Remove distprep

From 260d055b0428130d9db96bed2298495ce7e93505 Mon Sep 17 00:00:00 2001
From: Peter Eisentraut <peter@eisentraut.org>
Date: Fri, 14 Jul 2023 09:33:09 +0200
Subject: [PATCH v2] Remove distprep

A PostgreSQL release tarball contains a number of prebuilt files, in
particular files produced by bison, flex, perl, and well as html and
man documentation.  We have done this consistent with established
practice at the time to not require these tools for building from a
tarball.  Some of these tools were hard to get, or get the right
version of, from time to time, and shipping the prebuilt output was a
convenience to users.

Now this has at least two problems:

One, we have to make the build system(s) work in two modes: Building
from a git checkout and building from a tarball.  This is pretty
complicated, but it works so far for autoconf/make.  It does not
currently work for meson; you can currently only build with meson from
a git checkout.  Making meson builds work from a tarball seems very
difficult or impossible.  One particular problem is that since meson
requires a separate build directory, we cannot make the build update
files like gram.h in the source tree.  So if you were to build from a
tarball and update gram.y, you will have a gram.h in the source tree
and one in the build tree, but the way things work is that the
compiler will always use the one in the source tree.  So you cannot,
for example, make any gram.y changes when building from a tarball.
This seems impossible to fix in a non-horrible way.

Second, there is increased interest nowadays in precisely tracking the
origin of software.  We can reasonably track contributions into the
git tree, and users can reasonably track the path from a tarball to
packages and downloads and installs.  But what happens between the git
tree and the tarball is obscure and in some cases non-reproducible.

The solution for both of these issues is to get rid of the step that
adds prebuilt files to the tarball.  The tarball now only contains
what is in the git tree (*).  Getting the additional build
dependencies is no longer a problem nowadays, and the complications to
keep these dual build modes working are significant.  And of course we
want to get the meson build system working universally.

This commit removes the make distprep target altogether.  The make
dist target continues to do its job, it just doesn't call distprep
anymore.

(*) - The tarball also contains the INSTALL file that is built at make
dist time, but not by distprep.  This is unchanged for now.

The make maintainer-clean target, whose job it is to remove the
prebuilt files in addition to what make distclean does, is now just an
alias to make distprep.  (In practice, it is probably obsolete given
that git clean is available.)

The following programs are now hard build requirements in configure
(they were already required by meson.build):

- bison
- flex
- perl
---
 GNUmakefile.in                                |  6 +-
 config/perl.m4                                |  9 +-
 config/programs.m4                            | 21 +----
 configure                                     | 62 ++------------
 contrib/cube/Makefile                         |  7 +-
 contrib/fuzzystrmatch/Makefile                |  9 +-
 contrib/seg/Makefile                          |  7 +-
 doc/Makefile                                  |  2 +-
 doc/src/Makefile                              |  2 +-
 doc/src/sgml/Makefile                         |  9 +-
 doc/src/sgml/installation.sgml                | 83 ++++++++-----------
 meson.build                                   |  2 +-
 src/Makefile                                  |  5 +-
 src/Makefile.global.in                        | 30 +++----
 src/backend/Makefile                          | 65 ++-------------
 src/backend/bootstrap/Makefile                |  6 +-
 src/backend/catalog/Makefile                  | 14 +---
 src/backend/jit/llvm/Makefile                 |  2 +-
 src/backend/nls.mk                            |  2 +-
 src/backend/nodes/Makefile                    | 12 +--
 src/backend/parser/Makefile                   |  8 +-
 src/backend/port/Makefile                     |  2 +-
 src/backend/replication/Makefile              | 10 ++-
 .../replication/libpqwalreceiver/Makefile     |  2 +-
 src/backend/replication/pgoutput/Makefile     |  2 +-
 src/backend/snowball/Makefile                 |  4 -
 src/backend/storage/lmgr/Makefile             |  4 +-
 src/backend/utils/Makefile                    | 25 ++----
 src/backend/utils/activity/Makefile           |  2 +-
 src/backend/utils/adt/Makefile                |  5 +-
 src/backend/utils/mb/Makefile                 |  2 +-
 src/backend/utils/mb/Unicode/Makefile         |  2 -
 src/backend/utils/mb/conversion_procs/proc.mk |  2 +-
 src/backend/utils/misc/Makefile               |  3 +-
 src/bin/initdb/Makefile                       |  2 +-
 src/bin/pg_amcheck/Makefile                   |  2 +-
 src/bin/pg_archivecleanup/Makefile            |  2 +-
 src/bin/pg_basebackup/Makefile                |  2 +-
 src/bin/pg_checksums/Makefile                 |  2 +-
 src/bin/pg_config/Makefile                    |  2 +-
 src/bin/pg_controldata/Makefile               |  2 +-
 src/bin/pg_ctl/Makefile                       |  2 +-
 src/bin/pg_dump/Makefile                      |  2 +-
 src/bin/pg_resetwal/Makefile                  |  2 +-
 src/bin/pg_rewind/Makefile                    |  2 +-
 src/bin/pg_test_fsync/Makefile                |  2 +-
 src/bin/pg_test_timing/Makefile               |  2 +-
 src/bin/pg_upgrade/Makefile                   |  2 +-
 src/bin/pg_verifybackup/Makefile              |  2 +-
 src/bin/pg_waldump/Makefile                   |  2 +-
 src/bin/pgbench/Makefile                      |  4 -
 src/bin/psql/Makefile                         |  6 --
 src/bin/scripts/Makefile                      |  2 +-
 src/common/Makefile                           |  5 --
 src/common/unicode/Makefile                   |  2 -
 src/fe_utils/Makefile                         |  6 --
 src/include/Makefile                          |  2 +-
 src/interfaces/ecpg/Makefile                  |  2 +-
 src/interfaces/ecpg/compatlib/Makefile        |  2 -
 src/interfaces/ecpg/ecpglib/Makefile          |  2 -
 src/interfaces/ecpg/include/Makefile          |  2 +-
 src/interfaces/ecpg/pgtypeslib/Makefile       |  2 -
 src/interfaces/ecpg/preproc/Makefile          |  6 --
 src/interfaces/ecpg/test/Makefile             |  4 +-
 src/interfaces/libpq/Makefile                 |  3 -
 src/interfaces/libpq/test/Makefile            |  2 +-
 src/makefiles/pgxs.mk                         |  2 +-
 src/nls-global.mk                             |  2 +-
 src/pl/plperl/GNUmakefile                     |  2 +-
 src/pl/plpgsql/src/Makefile                   |  7 --
 src/pl/plpython/Makefile                      |  6 +-
 src/pl/tcl/Makefile                           |  5 --
 src/port/Makefile                             |  2 +-
 src/test/authentication/Makefile              |  2 +-
 src/test/examples/Makefile                    |  2 +-
 src/test/icu/Makefile                         |  2 +-
 src/test/isolation/Makefile                   |  4 -
 src/test/kerberos/Makefile                    |  2 +-
 src/test/ldap/Makefile                        |  2 +-
 src/test/locale/Makefile                      |  2 +-
 src/test/recovery/Makefile                    |  2 +-
 src/test/regress/GNUmakefile                  |  2 +-
 src/test/ssl/Makefile                         |  2 +-
 src/test/ssl/sslfiles.mk                      |  4 +-
 src/test/subscription/Makefile                |  2 +-
 src/timezone/Makefile                         |  2 +-
 src/tools/ifaddrs/Makefile                    |  2 +-
 src/tools/pg_bsd_indent/Makefile              |  2 +-
 88 files changed, 165 insertions(+), 407 deletions(-)

diff --git a/GNUmakefile.in b/GNUmakefile.in
index 9c18c56233..80db4c73f8 100644
--- a/GNUmakefile.in
+++ b/GNUmakefile.in
@@ -41,7 +41,7 @@ install-world-bin-contrib-recurse: install-world-bin-src-recurse
 
 $(call recurse,installdirs uninstall init-po update-po,doc src config)
 
-$(call recurse,distprep coverage,doc src config contrib)
+$(call recurse,coverage,doc src config contrib)
 
 # clean, distclean, etc should apply to contrib too, even though
 # it's not built by default
@@ -53,7 +53,7 @@ clean:
 
 # Important: distclean `src' last, otherwise Makefile.global
 # will be gone too soon.
-distclean maintainer-clean:
+distclean:
 	$(MAKE) -C doc $@
 	$(MAKE) -C contrib $@
 	$(MAKE) -C config $@
@@ -109,7 +109,6 @@ distdir:
 	      || cp "$(top_srcdir)/$$file" "$(distdir)/$$file"; \
 	  fi || exit; \
 	done
-	$(MAKE) -C $(distdir) distprep
 	$(MAKE) -C $(distdir)/doc/src/sgml/ INSTALL
 	cp $(distdir)/doc/src/sgml/INSTALL $(distdir)/
 	$(MAKE) -C $(distdir) distclean
@@ -122,7 +121,6 @@ distcheck: dist
 	install_prefix=`cd $(dummy) && pwd`; \
 	cd $(distdir) \
 	&& ./configure --prefix="$$install_prefix"
-	$(MAKE) -C $(distdir) -q distprep
 	$(MAKE) -C $(distdir)
 	$(MAKE) -C $(distdir) install
 	$(MAKE) -C $(distdir) uninstall
diff --git a/config/perl.m4 b/config/perl.m4
index 8126e79f67..1a3bb55649 100644
--- a/config/perl.m4
+++ b/config/perl.m4
@@ -13,19 +13,14 @@ if test "$PERL"; then
   if echo "$pgac_perl_version" | sed ['s/[.a-z_]/ /g'] | \
     $AWK '{ if ([$]1 == 5 && ([$]2 >= 14)) exit 1; else exit 0;}'
   then
-    AC_MSG_WARN([
+    AC_MSG_ERROR([
 *** The installed version of Perl, $PERL, is too old to use with PostgreSQL.
 *** Perl version 5.14 or later is required, but this is $pgac_perl_version.])
-    PERL=""
   fi
 fi
 
 if test -z "$PERL"; then
-  AC_MSG_WARN([
-*** Without Perl you will not be able to build PostgreSQL from Git.
-*** You can obtain Perl from any CPAN mirror site.
-*** (If you are using the official distribution of PostgreSQL then you do not
-*** need to worry about this, because the Perl output is pre-generated.)])
+  AC_MSG_ERROR([Perl not found])
 fi
 ])# PGAC_PATH_PERL
 
diff --git a/config/programs.m4 b/config/programs.m4
index 8a118b4e03..490ec9fe9f 100644
--- a/config/programs.m4
+++ b/config/programs.m4
@@ -33,10 +33,9 @@ if test "$BISON"; then
   AC_MSG_NOTICE([using $pgac_bison_version])
   if echo "$pgac_bison_version" | $AWK '{ if ([$]4 < 2.3) exit 0; else exit 1;}'
   then
-    AC_MSG_WARN([
+    AC_MSG_ERROR([
 *** The installed version of Bison, $BISON, is too old to use with PostgreSQL.
 *** Bison version 2.3 or later is required, but this is $pgac_bison_version.])
-    BISON=""
   fi
   # Bison >=3.0 issues warnings about %name-prefix="base_yy", instead
   # of the now preferred %name-prefix "base_yy", but the latter
@@ -49,12 +48,7 @@ if test "$BISON"; then
 fi
 
 if test -z "$BISON"; then
-  AC_MSG_WARN([
-*** Without Bison you will not be able to build PostgreSQL from Git nor
-*** change any of the parser definition files.  You can obtain Bison from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this, because the Bison
-*** output is pre-generated.)])
+  AC_MSG_ERROR([bison not found])
 fi
 dnl We don't need AC_SUBST(BISON) because PGAC_PATH_PROGS did it
 AC_SUBST(BISONFLAGS)
@@ -95,7 +89,7 @@ else
             pgac_cv_path_flex=$pgac_candidate
             break 2
           else
-            AC_MSG_WARN([
+            AC_MSG_ERROR([
 *** The installed version of Flex, $pgac_candidate, is too old to use with PostgreSQL.
 *** Flex version 2.5.35 or later is required, but this is $pgac_flex_version.])
           fi
@@ -109,14 +103,7 @@ fi
 ])[]dnl AC_CACHE_CHECK
 
 if test x"$pgac_cv_path_flex" = x"no"; then
-  AC_MSG_WARN([
-*** Without Flex you will not be able to build PostgreSQL from Git nor
-*** change any of the scanner definition files.  You can obtain Flex from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this because the Flex
-*** output is pre-generated.)])
-
-  FLEX=
+  AC_MSG_ERROR([flex not found])
 else
   FLEX=$pgac_cv_path_flex
   pgac_flex_version=`$FLEX --version 2>/dev/null`
diff --git a/configure b/configure
index 2e518c8007..802fc9edc4 100755
--- a/configure
+++ b/configure
@@ -10160,13 +10160,9 @@ if test "$BISON"; then
 $as_echo "$as_me: using $pgac_bison_version" >&6;}
   if echo "$pgac_bison_version" | $AWK '{ if ($4 < 2.3) exit 0; else exit 1;}'
   then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** The installed version of Bison, $BISON, is too old to use with PostgreSQL.
-*** Bison version 2.3 or later is required, but this is $pgac_bison_version." >&5
-$as_echo "$as_me: WARNING:
+    as_fn_error $? "
 *** The installed version of Bison, $BISON, is too old to use with PostgreSQL.
-*** Bison version 2.3 or later is required, but this is $pgac_bison_version." >&2;}
-    BISON=""
+*** Bison version 2.3 or later is required, but this is $pgac_bison_version." "$LINENO" 5
   fi
   # Bison >=3.0 issues warnings about %name-prefix="base_yy", instead
   # of the now preferred %name-prefix "base_yy", but the latter
@@ -10179,18 +10175,7 @@ $as_echo "$as_me: WARNING:
 fi
 
 if test -z "$BISON"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** Without Bison you will not be able to build PostgreSQL from Git nor
-*** change any of the parser definition files.  You can obtain Bison from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this, because the Bison
-*** output is pre-generated.)" >&5
-$as_echo "$as_me: WARNING:
-*** Without Bison you will not be able to build PostgreSQL from Git nor
-*** change any of the parser definition files.  You can obtain Bison from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this, because the Bison
-*** output is pre-generated.)" >&2;}
+  as_fn_error $? "bison not found" "$LINENO" 5
 fi
 
 
@@ -10223,12 +10208,9 @@ else
             pgac_cv_path_flex=$pgac_candidate
             break 2
           else
-            { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** The installed version of Flex, $pgac_candidate, is too old to use with PostgreSQL.
-*** Flex version 2.5.35 or later is required, but this is $pgac_flex_version." >&5
-$as_echo "$as_me: WARNING:
+            as_fn_error $? "
 *** The installed version of Flex, $pgac_candidate, is too old to use with PostgreSQL.
-*** Flex version 2.5.35 or later is required, but this is $pgac_flex_version." >&2;}
+*** Flex version 2.5.35 or later is required, but this is $pgac_flex_version." "$LINENO" 5
           fi
         fi
       fi
@@ -10242,20 +10224,7 @@ fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv_path_flex" >&5
 $as_echo "$pgac_cv_path_flex" >&6; }
 if test x"$pgac_cv_path_flex" = x"no"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** Without Flex you will not be able to build PostgreSQL from Git nor
-*** change any of the scanner definition files.  You can obtain Flex from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this because the Flex
-*** output is pre-generated.)" >&5
-$as_echo "$as_me: WARNING:
-*** Without Flex you will not be able to build PostgreSQL from Git nor
-*** change any of the scanner definition files.  You can obtain Flex from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this because the Flex
-*** output is pre-generated.)" >&2;}
-
-  FLEX=
+  as_fn_error $? "flex not found" "$LINENO" 5
 else
   FLEX=$pgac_cv_path_flex
   pgac_flex_version=`$FLEX --version 2>/dev/null`
@@ -10329,27 +10298,14 @@ $as_echo "$as_me: using perl $pgac_perl_version" >&6;}
   if echo "$pgac_perl_version" | sed 's/[.a-z_]/ /g' | \
     $AWK '{ if ($1 == 5 && ($2 >= 14)) exit 1; else exit 0;}'
   then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** The installed version of Perl, $PERL, is too old to use with PostgreSQL.
-*** Perl version 5.14 or later is required, but this is $pgac_perl_version." >&5
-$as_echo "$as_me: WARNING:
+    as_fn_error $? "
 *** The installed version of Perl, $PERL, is too old to use with PostgreSQL.
-*** Perl version 5.14 or later is required, but this is $pgac_perl_version." >&2;}
-    PERL=""
+*** Perl version 5.14 or later is required, but this is $pgac_perl_version." "$LINENO" 5
   fi
 fi
 
 if test -z "$PERL"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** Without Perl you will not be able to build PostgreSQL from Git.
-*** You can obtain Perl from any CPAN mirror site.
-*** (If you are using the official distribution of PostgreSQL then you do not
-*** need to worry about this, because the Perl output is pre-generated.)" >&5
-$as_echo "$as_me: WARNING:
-*** Without Perl you will not be able to build PostgreSQL from Git.
-*** You can obtain Perl from any CPAN mirror site.
-*** (If you are using the official distribution of PostgreSQL then you do not
-*** need to worry about this, because the Perl output is pre-generated.)" >&2;}
+  as_fn_error $? "Perl not found" "$LINENO" 5
 fi
 
 if test "$with_perl" = yes; then
diff --git a/contrib/cube/Makefile b/contrib/cube/Makefile
index 4fd19aac35..dfb0d806e4 100644
--- a/contrib/cube/Makefile
+++ b/contrib/cube/Makefile
@@ -18,6 +18,8 @@ REGRESS = cube cube_sci
 
 SHLIB_LINK += $(filter -lm, $(LIBS))
 
+EXTRA_CLEAN = cubeparse.h cubeparse.c cubescan.c
+
 ifdef USE_PGXS
 PG_CONFIG = pg_config
 PGXS := $(shell $(PG_CONFIG) --pgxs)
@@ -37,8 +39,3 @@ cubeparse.c: BISONFLAGS += -d
 
 # Force these dependencies to be known even without dependency info built:
 cubeparse.o cubescan.o: cubeparse.h
-
-distprep: cubeparse.c cubescan.c
-
-maintainer-clean:
-	rm -f cubeparse.h cubeparse.c cubescan.c
diff --git a/contrib/fuzzystrmatch/Makefile b/contrib/fuzzystrmatch/Makefile
index e68bc0e33f..04c83a34a7 100644
--- a/contrib/fuzzystrmatch/Makefile
+++ b/contrib/fuzzystrmatch/Makefile
@@ -15,6 +15,8 @@ PGFILEDESC = "fuzzystrmatch - similarities and distance between strings"
 
 REGRESS = fuzzystrmatch fuzzystrmatch_utf8
 
+EXTRA_CLEAN = daitch_mokotoff.h
+
 ifdef USE_PGXS
 PG_CONFIG = pg_config
 PGXS := $(shell $(PG_CONFIG) --pgxs)
@@ -31,10 +33,3 @@ daitch_mokotoff.o: daitch_mokotoff.h
 
 daitch_mokotoff.h: daitch_mokotoff_header.pl
 	$(PERL) $< $@
-
-# daitch_mokotoff.h is included in tarballs, so it has to be made by
-# "distprep" and not cleaned except by "maintainer-clean".
-distprep: daitch_mokotoff.h
-
-maintainer-clean:
-	rm -f daitch_mokotoff.h
diff --git a/contrib/seg/Makefile b/contrib/seg/Makefile
index a1e49bf051..132ec8dbfe 100644
--- a/contrib/seg/Makefile
+++ b/contrib/seg/Makefile
@@ -16,7 +16,7 @@ HEADERS = segdata.h
 
 REGRESS = security seg
 
-EXTRA_CLEAN = y.tab.c y.tab.h
+EXTRA_CLEAN = segparse.h segparse.c segscan.c
 
 ifdef USE_PGXS
 PG_CONFIG = pg_config
@@ -38,8 +38,3 @@ segparse.c: BISONFLAGS += -d
 
 # Force these dependencies to be known even without dependency info built:
 segparse.o segscan.o: segparse.h
-
-distprep: segparse.c segscan.c
-
-maintainer-clean:
-	rm -f segparse.h segparse.c segscan.c
diff --git a/doc/Makefile b/doc/Makefile
index aee3cc0965..24370fc903 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -12,5 +12,5 @@ subdir = doc
 top_builddir = ..
 include $(top_builddir)/src/Makefile.global
 
-all distprep html man install installdirs uninstall clean distclean maintainer-clean:
+all html man install installdirs uninstall clean distclean:
 	$(MAKE) -C src $@
diff --git a/doc/src/Makefile b/doc/src/Makefile
index 30d883815a..2ed02084ff 100644
--- a/doc/src/Makefile
+++ b/doc/src/Makefile
@@ -4,5 +4,5 @@ subdir = doc/src
 top_builddir = ../..
 include $(top_builddir)/src/Makefile.global
 
-all distprep html man install installdirs uninstall clean distclean maintainer-clean:
+all html man install installdirs uninstall clean distclean:
 	$(MAKE) -C sgml $@
diff --git a/doc/src/sgml/Makefile b/doc/src/sgml/Makefile
index 1e55e531db..82d57674a2 100644
--- a/doc/src/sgml/Makefile
+++ b/doc/src/sgml/Makefile
@@ -7,8 +7,7 @@
 #----------------------------------------------------------------------------
 
 # This makefile is for building and installing the documentation.
-# When a release tarball is created, the documentation files are
-# prepared using the distprep target.  In Git-based trees these files
+# In Git-based trees these files
 # don't exist, unless explicitly built, so we skip the installation in
 # that case.
 
@@ -28,8 +27,6 @@ include $(top_builddir)/src/Makefile.global
 
 all: html man
 
-distprep: html distprep-man
-
 
 ifndef DBTOEPUB
 DBTOEPUB = $(missing) dbtoepub
@@ -77,7 +74,7 @@ postgres-full.xml: postgres.sgml $(ALLSGML)
 ## Man pages
 ##
 
-man distprep-man: man-stamp
+man: man-stamp
 
 man-stamp: stylesheet-man.xsl postgres-full.xml
 	$(XSLTPROC) $(XMLINCLUDE) $(XSLTPROCFLAGS) $(XSLTPROC_MAN_FLAGS) $^
@@ -305,8 +302,6 @@ clean:
 	rm -f *.texixml *.texi *.info db2texi.refs
 
 distclean: clean
-
-maintainer-clean: distclean
 # HTML
 	rm -fr html/ html-stamp
 # man
diff --git a/doc/src/sgml/installation.sgml b/doc/src/sgml/installation.sgml
index ac8eee47c6..8eb928903e 100644
--- a/doc/src/sgml/installation.sgml
+++ b/doc/src/sgml/installation.sgml
@@ -72,8 +72,7 @@ <title>Requirements</title>
 
       Alternatively, <productname>PostgreSQL</productname> can be built using
       <ulink url="https://mesonbuild.com/">Meson</ulink>.  This is currently
-      experimental and only works when building from a Git checkout (not from
-      a distribution tarball).  If you choose to use
+      experimental.  If you choose to use
       <application>Meson</application>, then you don't need
       <acronym>GNU</acronym> <application>make</application>, but the other
       requirements below still apply.
@@ -102,6 +101,41 @@ <title>Requirements</title>
      </para>
     </listitem>
 
+    <listitem>
+     <para>
+      <indexterm>
+       <primary>flex</primary>
+      </indexterm>
+      <indexterm>
+       <primary>lex</primary>
+      </indexterm>
+      <indexterm>
+       <primary>bison</primary>
+      </indexterm>
+      <indexterm>
+       <primary>yacc</primary>
+      </indexterm>
+
+      <application>Flex</application> 2.5.35 or later and
+      <application>Bison</application> 2.3 or later are required.  Other
+      <application>lex</application> and <application>yacc</application>
+      programs cannot be used.
+     </para>
+    </listitem>
+
+    <listitem>
+     <para>
+      <indexterm>
+       <primary>perl</primary>
+      </indexterm>
+
+      <application>Perl</application> 5.14 or later is needed during the build
+      process and to run some test suites.  (This requirement is separate from
+      the requirements for building <application>PL/Perl</application>; see
+      below.)
+     </para>
+    </listitem>
+
     <listitem>
      <para>
       <indexterm>
@@ -315,51 +349,6 @@ <title>Requirements</title>
    </itemizedlist>
   </para>
 
-  <para>
-   If you are building from a <productname>Git</productname> tree instead of
-   using a released source package, or if you want to do server development,
-   you also need the following packages:
-
-   <itemizedlist>
-    <listitem>
-     <para>
-      <indexterm>
-       <primary>flex</primary>
-      </indexterm>
-      <indexterm>
-       <primary>lex</primary>
-      </indexterm>
-      <indexterm>
-       <primary>bison</primary>
-      </indexterm>
-      <indexterm>
-       <primary>yacc</primary>
-      </indexterm>
-
-      <application>Flex</application> and <application>Bison</application>
-      are needed to build from a Git checkout, or if you changed the actual
-      scanner and parser definition files. If you need them, be sure
-      to get <application>Flex</application> 2.5.35 or later and
-      <application>Bison</application> 2.3 or later. Other <application>lex</application>
-      and <application>yacc</application> programs cannot be used.
-     </para>
-    </listitem>
-    <listitem>
-     <para>
-      <indexterm>
-       <primary>perl</primary>
-      </indexterm>
-
-      <application>Perl</application> 5.14 or later is needed to build from a Git checkout,
-      or if you changed the input files for any of the build steps that
-      use Perl scripts.  If building on Windows you will need
-      <application>Perl</application> in any case.  <application>Perl</application> is
-      also required to run some test suites.
-     </para>
-    </listitem>
-   </itemizedlist>
-  </para>
-
   <para>
    If you need to get a <acronym>GNU</acronym> package, you can find
    it at your local <acronym>GNU</acronym> mirror site (see <ulink
diff --git a/meson.build b/meson.build
index 04ea348852..0f426d68d6 100644
--- a/meson.build
+++ b/meson.build
@@ -72,7 +72,7 @@ configure. Alternatively use a separate check out for meson based builds.
 @0@
 ****'''
 if fs.exists(meson.current_source_dir() / 'src' / 'include' / 'pg_config.h')
-  errmsg_cleanup = 'To clean up, run make maintainer-clean in the source tree.'
+  errmsg_cleanup = 'To clean up, run make distclean in the source tree.'
   error(errmsg_nonclean_base.format(errmsg_cleanup))
 endif
 
diff --git a/src/Makefile b/src/Makefile
index 94649c36c7..2f31a2f20a 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -59,16 +59,13 @@ uninstall: uninstall-local
 uninstall-local:
 	rm -f $(addprefix '$(DESTDIR)$(pgxsdir)/$(subdir)'/, Makefile.global Makefile.port Makefile.shlib nls-global.mk)
 
-distprep:
-	$(MAKE) -C test/isolation $@
-
 clean:
 	$(MAKE) -C test $@
 	$(MAKE) -C tutorial NO_PGXS=1 $@
 	$(MAKE) -C test/isolation $@
 	$(MAKE) -C tools/pg_bsd_indent $@
 
-distclean maintainer-clean:
+distclean:
 	$(MAKE) -C test $@
 	$(MAKE) -C tutorial NO_PGXS=1 $@
 	$(MAKE) -C test/isolation $@
diff --git a/src/Makefile.global.in b/src/Makefile.global.in
index df9f721a41..2159692439 100644
--- a/src/Makefile.global.in
+++ b/src/Makefile.global.in
@@ -19,11 +19,11 @@
 #
 # Meta configuration
 
-standard_targets = all install installdirs uninstall distprep clean distclean maintainer-clean coverage check checkprep installcheck init-po update-po
+standard_targets = all install installdirs uninstall clean distclean coverage check checkprep installcheck init-po update-po
 # these targets should recurse even into subdirectories not being built:
-standard_always_targets = distprep clean distclean maintainer-clean
+standard_always_targets = clean distclean
 
-.PHONY: $(standard_targets) install-strip html man installcheck-parallel update-unicode
+.PHONY: $(standard_targets) maintainer-clean install-strip html man installcheck-parallel update-unicode
 
 # make `all' the default target
 all:
@@ -35,6 +35,8 @@ all:
 # Never delete any intermediate files automatically.
 .SECONDARY:
 
+maintainer-clean: distclean
+
 # PostgreSQL version number
 VERSION = @PACKAGE_VERSION@
 MAJORVERSION = @PG_MAJORVERSION@
@@ -319,12 +321,8 @@ X = @EXEEXT@
 
 # Perl
 
-ifneq (@PERL@,)
-    # quoted to protect pathname with spaces
-    PERL		= '@PERL@'
-else
-    PERL		= $(missing) perl
-endif
+# quoted to protect pathname with spaces
+PERL		= '@PERL@'
 perl_archlibexp		= @perl_archlibexp@
 perl_privlibexp		= @perl_privlibexp@
 perl_includespec	= @perl_includespec@
@@ -765,21 +763,13 @@ TAS         = @TAS@
 # Global targets and rules
 
 %.c: %.l
-ifdef FLEX
 	$(FLEX) $(if $(FLEX_NO_BACKUP),-b) $(FLEXFLAGS) -o'$@' $<
 	@$(if $(FLEX_NO_BACKUP),if [ `wc -l <lex.backup` -eq 1 ]; then rm lex.backup; else echo "Scanner requires backup; see lex.backup." 1>&2; exit 1; fi)
 	$(if $(FLEX_FIX_WARNING),$(PERL) $(top_srcdir)/src/tools/fix-old-flex-code.pl '$@')
-else
-	@$(missing) flex $< '$@'
-endif
 
 %.c: %.y
 	$(if $(BISON_CHECK_CMD),$(BISON_CHECK_CMD))
-ifdef BISON
 	$(BISON) $(BISONFLAGS) -o $@ $<
-else
-	@$(missing) bison $< $@
-endif
 
 %.i: %.c
 	$(CPP) $(CPPFLAGS) -o $@ $<
@@ -907,7 +897,7 @@ recurse = $(foreach target,$(if $1,$1,$(standard_targets)),$(foreach subdir,$(if
 # If a makefile's list of SUBDIRS varies depending on configuration, then
 # any subdirectories excluded from SUBDIRS should instead be added to
 # ALWAYS_SUBDIRS, and then it must call recurse_always as well as recurse.
-# This ensures that distprep, distclean, etc will apply to all subdirectories.
+# This ensures that distclean, etc will apply to all subdirectories.
 # In the normal case all arguments will be defaulted.
 # $1: targets to make recursive (defaults to standard_always_targets)
 # $2: list of subdirs (defaults to ALWAYS_SUBDIRS variable)
@@ -962,7 +952,7 @@ include $(Po_files)
 endif
 
 # hook for clean-up
-clean distclean maintainer-clean: clean-deps
+clean distclean: clean-deps
 
 .PHONY: clean-deps
 clean-deps:
@@ -1046,7 +1036,7 @@ lcov_test.info: $(all_gcda_files)
 
 
 # hook for clean-up
-clean distclean maintainer-clean: clean-coverage
+clean distclean: clean-coverage
 
 .PHONY: clean-coverage
 clean-coverage:
diff --git a/src/backend/Makefile b/src/backend/Makefile
index 1c929383c4..023e14c15c 100644
--- a/src/backend/Makefile
+++ b/src/backend/Makefile
@@ -138,63 +138,38 @@ utils/activity/wait_event_types.h: utils/activity/generate-wait_event_types.pl u
 
 # run this unconditionally to avoid needing to know its dependencies here:
 submake-catalog-headers:
-	$(MAKE) -C catalog distprep generated-header-symlinks
+	$(MAKE) -C catalog generated-header-symlinks
 
 # run this unconditionally to avoid needing to know its dependencies here:
 submake-nodes-headers:
-	$(MAKE) -C nodes distprep generated-header-symlinks
+	$(MAKE) -C nodes generated-header-symlinks
 
 # run this unconditionally to avoid needing to know its dependencies here:
 submake-utils-headers:
-	$(MAKE) -C utils distprep generated-header-symlinks
+	$(MAKE) -C utils generated-header-symlinks
 
 .PHONY: submake-catalog-headers submake-nodes-headers submake-utils-headers
 
 # Make symlinks for these headers in the include directory. That way
 # we can cut down on the -I options. Also, a symlink is automatically
 # up to date when we update the base file.
-#
-# The point of the prereqdir incantation in some of the rules below is to
-# force the symlink to use an absolute path rather than a relative path.
-# For headers which are generated by make distprep, the actual header within
-# src/backend will be in the source tree, while the symlink in src/include
-# will be in the build tree, so a simple ../.. reference won't work.
-# For headers generated during regular builds, we prefer a relative symlink.
 
 .PHONY: generated-headers
 
 generated-headers: $(top_builddir)/src/include/storage/lwlocknames.h $(top_builddir)/src/include/utils/wait_event_types.h submake-catalog-headers submake-nodes-headers submake-utils-headers
 
 $(top_builddir)/src/include/storage/lwlocknames.h: storage/lmgr/lwlocknames.h
-	prereqdir=`cd '$(dir $<)' >/dev/null && pwd` && \
-	  cd '$(dir $@)' && rm -f $(notdir $@) && \
-	  $(LN_S) "$$prereqdir/$(notdir $<)" .
+	rm -f '$@'
+	$(LN_S) ../../backend/$< '$@'
 
 $(top_builddir)/src/include/utils/wait_event_types.h: utils/activity/wait_event_types.h
-	prereqdir=`cd '$(dir $<)' >/dev/null && pwd` && \
-	  cd '$(dir $@)' && rm -f $(notdir $@) && \
-	  $(LN_S) "$$prereqdir/$(notdir $<)" .
+	rm -f '$@'
+	$(LN_S) ../../backend/$< '$@'
 
 utils/probes.o: utils/probes.d $(SUBDIROBJS)
 	$(DTRACE) $(DTRACEFLAGS) -C -G -s $(call expand_subsys,$^) -o $@
 
 
-##########################################################################
-
-# Be sure that these files get removed by the maintainer-clean target
-distprep:
-	$(MAKE) -C parser	gram.c gram.h scan.c
-	$(MAKE) -C bootstrap	bootparse.c bootparse.h bootscanner.c
-	$(MAKE) -C catalog	distprep
-	$(MAKE) -C nodes	distprep
-	$(MAKE) -C replication	repl_gram.c repl_gram.h repl_scanner.c syncrep_gram.c syncrep_gram.h syncrep_scanner.c
-	$(MAKE) -C storage/lmgr	lwlocknames.h lwlocknames.c
-	$(MAKE) -C utils	distprep
-	$(MAKE) -C utils/activity	wait_event_types.h pgstat_wait_event.c
-	$(MAKE) -C utils/adt	jsonpath_gram.c jsonpath_gram.h jsonpath_scan.c
-	$(MAKE) -C utils/misc	guc-file.c
-
-
 ##########################################################################
 
 install: all installdirs install-bin
@@ -290,33 +265,9 @@ ifeq ($(PORTNAME), win32)
 endif
 
 distclean: clean
+# generated by configure
 	rm -f port/tas.s port/pg_sema.c port/pg_shmem.c
 
-maintainer-clean: distclean
-	$(MAKE) -C catalog $@
-	$(MAKE) -C nodes $@
-	$(MAKE) -C utils $@
-	rm -f bootstrap/bootparse.c \
-	      bootstrap/bootparse.h \
-	      bootstrap/bootscanner.c \
-	      parser/gram.c \
-	      parser/gram.h \
-	      parser/scan.c \
-	      replication/repl_gram.c \
-	      replication/repl_gram.h \
-	      replication/repl_scanner.c \
-	      replication/syncrep_gram.c \
-	      replication/syncrep_gram.h \
-	      replication/syncrep_scanner.c \
-	      storage/lmgr/lwlocknames.c \
-	      storage/lmgr/lwlocknames.h \
-	      utils/activity/pgstat_wait_event.c \
-	      utils/activity/wait_event_types.h \
-	      utils/adt/jsonpath_gram.c \
-	      utils/adt/jsonpath_gram.h \
-	      utils/adt/jsonpath_scan.c \
-	      utils/misc/guc-file.c
-
 
 ##########################################################################
 #
diff --git a/src/backend/bootstrap/Makefile b/src/backend/bootstrap/Makefile
index 606c8021e7..43dd2bc9aa 100644
--- a/src/backend/bootstrap/Makefile
+++ b/src/backend/bootstrap/Makefile
@@ -28,5 +28,7 @@ bootparse.c: BISONFLAGS += -d
 # Force these dependencies to be known even without dependency info built:
 bootparse.o bootscanner.o: bootparse.h
 
-# bootparse.c and bootscanner.c are in the distribution tarball, so
-# they are not cleaned here.
+clean:
+	rm -f bootstrap/bootparse.c \
+	      bootstrap/bootparse.h \
+	      bootstrap/bootscanner.c
diff --git a/src/backend/catalog/Makefile b/src/backend/catalog/Makefile
index a60107bf94..b49666dae2 100644
--- a/src/backend/catalog/Makefile
+++ b/src/backend/catalog/Makefile
@@ -89,9 +89,7 @@ POSTGRES_BKI_DATA = $(addprefix $(top_srcdir)/src/include/catalog/,\
 	pg_ts_template.dat pg_type.dat \
 	)
 
-all: distprep generated-header-symlinks
-
-distprep: bki-stamp
+all: generated-header-symlinks
 
 .PHONY: generated-header-symlinks
 
@@ -110,14 +108,12 @@ bki-stamp: genbki.pl Catalog.pm $(POSTGRES_BKI_SRCS) $(POSTGRES_BKI_DATA) $(top_
 		--set-version=$(MAJORVERSION) $(POSTGRES_BKI_SRCS)
 	touch $@
 
-# The generated headers must all be symlinked into builddir/src/include/,
-# using absolute links for the reasons explained in src/backend/Makefile.
+# The generated headers must all be symlinked into src/include/.
 # We use header-stamp to record that we've done this because the symlinks
 # themselves may appear older than bki-stamp.
 $(top_builddir)/src/include/catalog/header-stamp: bki-stamp
-	prereqdir=`cd '$(dir $<)' >/dev/null && pwd` && \
 	cd '$(dir $@)' && for file in $(GENERATED_HEADERS); do \
-	  rm -f $$file && $(LN_S) "$$prereqdir/$$file" . ; \
+	  rm -f $$file && $(LN_S) "../../../$(subdir)/$$file" . ; \
 	done
 	touch $@
 
@@ -138,9 +134,5 @@ installdirs:
 uninstall-data:
 	rm -f $(addprefix '$(DESTDIR)$(datadir)'/, postgres.bki system_constraints.sql system_functions.sql system_views.sql information_schema.sql sql_features.txt)
 
-# postgres.bki, system_constraints.sql, and the generated headers are
-# in the distribution tarball, so they are not cleaned here.
 clean:
-
-maintainer-clean: clean
 	rm -f bki-stamp postgres.bki system_constraints.sql $(GENERATED_HEADERS)
diff --git a/src/backend/jit/llvm/Makefile b/src/backend/jit/llvm/Makefile
index 2da122a391..0036c4f552 100644
--- a/src/backend/jit/llvm/Makefile
+++ b/src/backend/jit/llvm/Makefile
@@ -71,6 +71,6 @@ uninstall-types:
 
 include $(top_srcdir)/src/Makefile.shlib
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 	rm -f $(OBJS)
 	rm -f llvmjit_types.bc
diff --git a/src/backend/nls.mk b/src/backend/nls.mk
index 8263527c85..f1464cc5c5 100644
--- a/src/backend/nls.mk
+++ b/src/backend/nls.mk
@@ -22,7 +22,7 @@ GETTEXT_FLAGS    = $(BACKEND_COMMON_GETTEXT_FLAGS) \
     report_invalid_record:2:c-format \
     ereport_startup_progress:1:c-format
 
-gettext-files: distprep
+gettext-files: postgres
 	find $(srcdir) $(srcdir)/../common $(srcdir)/../port -name '*.c' -print | LC_ALL=C sort >$@
 
 my-clean:
diff --git a/src/backend/nodes/Makefile b/src/backend/nodes/Makefile
index 0a95e683d0..ebbe9052cb 100644
--- a/src/backend/nodes/Makefile
+++ b/src/backend/nodes/Makefile
@@ -65,9 +65,7 @@ node_headers = \
 
 # see also catalog/Makefile for an explanation of these make rules
 
-all: distprep generated-header-symlinks
-
-distprep: node-support-stamp
+all: generated-header-symlinks
 
 .PHONY: generated-header-symlinks
 
@@ -81,14 +79,12 @@ node-support-stamp: gen_node_support.pl $(addprefix $(top_srcdir)/src/include/,$
 	$(PERL) $^
 	touch $@
 
-# These generated headers must be symlinked into builddir/src/include/,
-# using absolute links for the reasons explained in src/backend/Makefile.
+# These generated headers must be symlinked into src/include/.
 # We use header-stamp to record that we've done this because the symlinks
 # themselves may appear older than node-support-stamp.
 $(top_builddir)/src/include/nodes/header-stamp: node-support-stamp
-	prereqdir=`cd '$(dir $<)' >/dev/null && pwd` && \
 	cd '$(dir $@)' && for file in nodetags.h; do \
-	  rm -f $$file && $(LN_S) "$$prereqdir/$$file" . ; \
+	  rm -f $$file && $(LN_S) "../../../$(subdir)/$$file" . ; \
 	done
 	touch $@
 
@@ -98,5 +94,5 @@ outfuncs.o: outfuncs.c outfuncs.funcs.c outfuncs.switch.c | node-support-stamp
 queryjumblefuncs.o: queryjumblefuncs.c queryjumblefuncs.funcs.c queryjumblefuncs.switch.c | node-support-stamp
 readfuncs.o:  readfuncs.c readfuncs.funcs.c readfuncs.switch.c | node-support-stamp
 
-maintainer-clean: clean
+clean:
 	rm -f node-support-stamp $(addsuffix funcs.funcs.c,copy equal out queryjumble read) $(addsuffix funcs.switch.c,copy equal out queryjumble read) nodetags.h
diff --git a/src/backend/parser/Makefile b/src/backend/parser/Makefile
index 9f1c4022bb..3d33b082f2 100644
--- a/src/backend/parser/Makefile
+++ b/src/backend/parser/Makefile
@@ -64,8 +64,8 @@ scan.c: FLEX_FIX_WARNING=yes
 # Force these dependencies to be known even without dependency info built:
 gram.o scan.o parser.o: gram.h
 
-
-# gram.c, gram.h, and scan.c are in the distribution tarball, so they
-# are not cleaned here.
-clean distclean maintainer-clean:
+clean:
+	rm -f parser/gram.c \
+	      parser/gram.h \
+	      parser/scan.c
 	rm -f lex.backup
diff --git a/src/backend/port/Makefile b/src/backend/port/Makefile
index 2d00b4f05a..47338d9922 100644
--- a/src/backend/port/Makefile
+++ b/src/backend/port/Makefile
@@ -43,6 +43,6 @@ else
 	$(CC) $(CFLAGS) -c $<
 endif
 
-distclean clean:
+clean:
 	rm -f tas_cpp.s
 	$(MAKE) -C win32 clean
diff --git a/src/backend/replication/Makefile b/src/backend/replication/Makefile
index 23f29ba545..9cc82680ab 100644
--- a/src/backend/replication/Makefile
+++ b/src/backend/replication/Makefile
@@ -48,6 +48,10 @@ syncrep_gram.c: BISONFLAGS += -d
 # Force these dependencies to be known even without dependency info built:
 syncrep_gram.o syncrep_scanner.o: syncrep_gram.h
 
-# repl_gram.c, repl_scanner.c, syncrep_gram.c and syncrep_scanner.c
-# are in the distribution tarball, so they are not cleaned here.
-# (Our parent Makefile takes care of them during maintainer-clean.)
+clean:
+	rm -f replication/repl_gram.c \
+	      replication/repl_gram.h \
+	      replication/repl_scanner.c \
+	      replication/syncrep_gram.c \
+	      replication/syncrep_gram.h \
+	      replication/syncrep_scanner.c
diff --git a/src/backend/replication/libpqwalreceiver/Makefile b/src/backend/replication/libpqwalreceiver/Makefile
index f26daa135f..e882907350 100644
--- a/src/backend/replication/libpqwalreceiver/Makefile
+++ b/src/backend/replication/libpqwalreceiver/Makefile
@@ -33,5 +33,5 @@ installdirs: installdirs-lib
 
 uninstall: uninstall-lib
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 	rm -f $(OBJS)
diff --git a/src/backend/replication/pgoutput/Makefile b/src/backend/replication/pgoutput/Makefile
index 3b41fbcfac..d89d317fe7 100644
--- a/src/backend/replication/pgoutput/Makefile
+++ b/src/backend/replication/pgoutput/Makefile
@@ -28,5 +28,5 @@ installdirs: installdirs-lib
 
 uninstall: uninstall-lib
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 	rm -f $(OBJS)
diff --git a/src/backend/snowball/Makefile b/src/backend/snowball/Makefile
index 4bebfa0250..efc4300eb9 100644
--- a/src/backend/snowball/Makefile
+++ b/src/backend/snowball/Makefile
@@ -104,8 +104,6 @@ include $(top_srcdir)/src/Makefile.shlib
 $(SQLSCRIPT): snowball_create.pl snowball_func.sql.in snowball.sql.in
 	$(PERL) $< --input ${srcdir} --outdir .
 
-distprep: $(SQLSCRIPT)
-
 install: all installdirs install-lib install-script
 	$(INSTALL_DATA) $(addprefix $(srcdir)/stopwords/,$(stop_files)) '$(DESTDIR)$(datadir)/$(DICTDIR)'
 
@@ -122,6 +120,4 @@ uninstall: uninstall-lib
 
 clean distclean: clean-lib
 	rm -f $(OBJS)
-
-maintainer-clean: distclean
 	rm -f $(SQLSCRIPT)
diff --git a/src/backend/storage/lmgr/Makefile b/src/backend/storage/lmgr/Makefile
index b25b7ee421..c48ba943c4 100644
--- a/src/backend/storage/lmgr/Makefile
+++ b/src/backend/storage/lmgr/Makefile
@@ -45,8 +45,6 @@ lwlocknames.h: $(top_srcdir)/src/backend/storage/lmgr/lwlocknames.txt generate-l
 check: s_lock_test
 	./s_lock_test
 
-clean distclean:
+clean:
 	rm -f s_lock_test
-
-maintainer-clean: clean
 	rm -f lwlocknames.h lwlocknames.c
diff --git a/src/backend/utils/Makefile b/src/backend/utils/Makefile
index deb901609f..ba82a724f1 100644
--- a/src/backend/utils/Makefile
+++ b/src/backend/utils/Makefile
@@ -34,13 +34,11 @@ catalogdir  = $(top_srcdir)/src/backend/catalog
 
 include $(top_srcdir)/src/backend/common.mk
 
-all: distprep probes.h generated-header-symlinks
-
-distprep: fmgr-stamp errcodes.h
+all: probes.h generated-header-symlinks
 
 .PHONY: generated-header-symlinks
 
-generated-header-symlinks: $(top_builddir)/src/include/utils/header-stamp $(top_builddir)/src/include/utils/probes.h
+generated-header-symlinks: $(top_builddir)/src/include/utils/header-stamp
 
 $(SUBDIRS:%=%-recursive): fmgr-stamp errcodes.h
 
@@ -66,22 +64,15 @@ probes.h: Gen_dummy_probes.sed probes.d
 	sed -f $^ >$@
 endif
 
-# These generated headers must be symlinked into builddir/src/include/,
-# using absolute links for the reasons explained in src/backend/Makefile.
+# These generated headers must be symlinked into src/include/.
 # We use header-stamp to record that we've done this because the symlinks
 # themselves may appear older than fmgr-stamp.
-$(top_builddir)/src/include/utils/header-stamp: fmgr-stamp errcodes.h
-	prereqdir=`cd '$(dir $<)' >/dev/null && pwd` && \
-	cd '$(dir $@)' && for file in fmgroids.h fmgrprotos.h errcodes.h; do \
-	  rm -f $$file && $(LN_S) "$$prereqdir/$$file" . ; \
+$(top_builddir)/src/include/utils/header-stamp: fmgr-stamp errcodes.h probes.h
+	cd '$(dir $@)' && for file in fmgroids.h fmgrprotos.h errcodes.h probes.h; do \
+	  rm -f $$file && $(LN_S) "../../../$(subdir)/$$file" . ; \
 	done
 	touch $@
 
-# probes.h is handled differently because it's not in the distribution tarball.
-$(top_builddir)/src/include/utils/probes.h: probes.h
-	cd '$(dir $@)' && rm -f $(notdir $@) && \
-	    $(LN_S) "../../../$(subdir)/probes.h" .
-
 # Recipe for rebuilding the Perl version of Gen_dummy_probes
 # Nothing depends on it, so it will never be called unless explicitly requested
 # The last two lines of the recipe format the script according to  our
@@ -104,10 +95,6 @@ installdirs:
 uninstall-data:
 	rm -f $(addprefix '$(DESTDIR)$(datadir)'/, errcodes.txt)
 
-# fmgroids.h, fmgrprotos.h, fmgrtab.c, fmgr-stamp, and errcodes.h are in the
-# distribution tarball, so they are not cleaned here.
 clean:
 	rm -f probes.h probes.h.tmp
-
-maintainer-clean: clean
 	rm -f fmgroids.h fmgrprotos.h fmgrtab.c fmgr-stamp errcodes.h
diff --git a/src/backend/utils/activity/Makefile b/src/backend/utils/activity/Makefile
index f1117745d4..ac76cf782d 100644
--- a/src/backend/utils/activity/Makefile
+++ b/src/backend/utils/activity/Makefile
@@ -43,5 +43,5 @@ pgstat_wait_event.c: wait_event_types.h
 wait_event_types.h: $(top_srcdir)/src/backend/utils/activity/wait_event_names.txt generate-wait_event_types.pl
 	$(PERL) $(srcdir)/generate-wait_event_types.pl --code $<
 
-maintainer-clean: clean
+clean:
 	rm -f wait_event_types.h pgstat_wait_event.c
diff --git a/src/backend/utils/adt/Makefile b/src/backend/utils/adt/Makefile
index 0de0bbb1b8..199eae525d 100644
--- a/src/backend/utils/adt/Makefile
+++ b/src/backend/utils/adt/Makefile
@@ -132,10 +132,9 @@ jsonpath_scan.c: FLEX_NO_BACKUP=yes
 # Force these dependencies to be known even without dependency info built:
 jsonpath_gram.o jsonpath_scan.o: jsonpath_gram.h
 
-# jsonpath_gram.c and jsonpath_scan.c are in the distribution tarball,
-# so they are not cleaned here.
-clean distclean maintainer-clean:
+clean:
 	rm -f lex.backup
+	rm -f jsonpath_gram.c jsonpath_gram.h jsonpath_scan.c
 
 like.o: like.c like_match.c
 
diff --git a/src/backend/utils/mb/Makefile b/src/backend/utils/mb/Makefile
index b19a125fa2..bbde71b5aa 100644
--- a/src/backend/utils/mb/Makefile
+++ b/src/backend/utils/mb/Makefile
@@ -21,5 +21,5 @@ OBJS = \
 
 include $(top_srcdir)/src/backend/common.mk
 
-clean distclean maintainer-clean:
+clean distclean:
 	$(MAKE) -C conversion_procs $@
diff --git a/src/backend/utils/mb/Unicode/Makefile b/src/backend/utils/mb/Unicode/Makefile
index 728ccb99c2..6c0a8150f2 100644
--- a/src/backend/utils/mb/Unicode/Makefile
+++ b/src/backend/utils/mb/Unicode/Makefile
@@ -66,8 +66,6 @@ all: $(MAPS)
 
 distclean: clean
 	rm -f $(TEXTS)
-
-maintainer-clean: distclean
 	rm -f $(MAPS)
 
 
diff --git a/src/backend/utils/mb/conversion_procs/proc.mk b/src/backend/utils/mb/conversion_procs/proc.mk
index e0a3b74b25..2eeae28240 100644
--- a/src/backend/utils/mb/conversion_procs/proc.mk
+++ b/src/backend/utils/mb/conversion_procs/proc.mk
@@ -13,5 +13,5 @@ installdirs: installdirs-lib
 
 uninstall: uninstall-lib
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 	rm -f $(OBJS)
diff --git a/src/backend/utils/misc/Makefile b/src/backend/utils/misc/Makefile
index 2910032930..c2971c7678 100644
--- a/src/backend/utils/misc/Makefile
+++ b/src/backend/utils/misc/Makefile
@@ -40,6 +40,5 @@ endif
 
 include $(top_srcdir)/src/backend/common.mk
 
-# Note: guc-file.c is not deleted by 'make clean',
-# since we want to ship it in distribution tarballs.
 clean:
+	rm -f guc-file.c
diff --git a/src/bin/initdb/Makefile b/src/bin/initdb/Makefile
index d69bd89572..7043289239 100644
--- a/src/bin/initdb/Makefile
+++ b/src/bin/initdb/Makefile
@@ -55,7 +55,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/initdb$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f initdb$(X) $(OBJS) localtime.c
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_amcheck/Makefile b/src/bin/pg_amcheck/Makefile
index 947f2267ed..528c588e35 100644
--- a/src/bin/pg_amcheck/Makefile
+++ b/src/bin/pg_amcheck/Makefile
@@ -40,7 +40,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_amcheck$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_amcheck$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_archivecleanup/Makefile b/src/bin/pg_archivecleanup/Makefile
index 49935d6dce..93fd703f22 100644
--- a/src/bin/pg_archivecleanup/Makefile
+++ b/src/bin/pg_archivecleanup/Makefile
@@ -25,7 +25,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_archivecleanup$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_archivecleanup$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_basebackup/Makefile b/src/bin/pg_basebackup/Makefile
index 893a75c942..74dc1ddd6d 100644
--- a/src/bin/pg_basebackup/Makefile
+++ b/src/bin/pg_basebackup/Makefile
@@ -71,7 +71,7 @@ uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_receivewal$(X)'
 	rm -f '$(DESTDIR)$(bindir)/pg_recvlogical$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_basebackup$(X) pg_receivewal$(X) pg_recvlogical$(X) \
 		$(BBOBJS) pg_receivewal.o pg_recvlogical.o \
 		$(OBJS)
diff --git a/src/bin/pg_checksums/Makefile b/src/bin/pg_checksums/Makefile
index 4911f6bee2..ac736b2260 100644
--- a/src/bin/pg_checksums/Makefile
+++ b/src/bin/pg_checksums/Makefile
@@ -36,7 +36,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_checksums$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_checksums$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_config/Makefile b/src/bin/pg_config/Makefile
index 1a405f9c97..cb13aceafa 100644
--- a/src/bin/pg_config/Makefile
+++ b/src/bin/pg_config/Makefile
@@ -33,7 +33,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_config$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_config$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_controldata/Makefile b/src/bin/pg_controldata/Makefile
index aa5bd58222..00ee1e25b3 100644
--- a/src/bin/pg_controldata/Makefile
+++ b/src/bin/pg_controldata/Makefile
@@ -33,7 +33,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_controldata$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_controldata$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_ctl/Makefile b/src/bin/pg_ctl/Makefile
index 4b6d47a8f8..4d29ca72c1 100644
--- a/src/bin/pg_ctl/Makefile
+++ b/src/bin/pg_ctl/Makefile
@@ -42,7 +42,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_ctl$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_ctl$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_dump/Makefile b/src/bin/pg_dump/Makefile
index 24de7593a6..604cddb997 100644
--- a/src/bin/pg_dump/Makefile
+++ b/src/bin/pg_dump/Makefile
@@ -69,6 +69,6 @@ installcheck:
 uninstall:
 	rm -f $(addprefix '$(DESTDIR)$(bindir)'/, pg_dump$(X) pg_restore$(X) pg_dumpall$(X))
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_dump$(X) pg_restore$(X) pg_dumpall$(X) $(OBJS) pg_dump.o common.o pg_dump_sort.o pg_restore.o pg_dumpall.o
 	rm -rf tmp_check
diff --git a/src/bin/pg_resetwal/Makefile b/src/bin/pg_resetwal/Makefile
index a363b948b5..a06e493ba8 100644
--- a/src/bin/pg_resetwal/Makefile
+++ b/src/bin/pg_resetwal/Makefile
@@ -33,7 +33,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_resetwal$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_resetwal$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_rewind/Makefile b/src/bin/pg_rewind/Makefile
index bed05f1609..8df1da80cb 100644
--- a/src/bin/pg_rewind/Makefile
+++ b/src/bin/pg_rewind/Makefile
@@ -49,7 +49,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_rewind$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_rewind$(X) $(OBJS) xlogreader.c
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_test_fsync/Makefile b/src/bin/pg_test_fsync/Makefile
index 631d0f38a8..4c5e518125 100644
--- a/src/bin/pg_test_fsync/Makefile
+++ b/src/bin/pg_test_fsync/Makefile
@@ -31,6 +31,6 @@ installcheck:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_test_fsync$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_test_fsync$(X) $(OBJS)
 	rm -rf tmp_check
diff --git a/src/bin/pg_test_timing/Makefile b/src/bin/pg_test_timing/Makefile
index 84d84c38aa..7f677edadb 100644
--- a/src/bin/pg_test_timing/Makefile
+++ b/src/bin/pg_test_timing/Makefile
@@ -31,6 +31,6 @@ installcheck:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_test_timing$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_test_timing$(X) $(OBJS)
 	rm -rf tmp_check
diff --git a/src/bin/pg_upgrade/Makefile b/src/bin/pg_upgrade/Makefile
index 5834513add..f76aca1b1a 100644
--- a/src/bin/pg_upgrade/Makefile
+++ b/src/bin/pg_upgrade/Makefile
@@ -46,7 +46,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_upgrade$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_upgrade$(X) $(OBJS)
 	rm -rf delete_old_cluster.sh log/ tmp_check/ \
 	       reindex_hash.sql
diff --git a/src/bin/pg_verifybackup/Makefile b/src/bin/pg_verifybackup/Makefile
index 596df15118..c96323faa9 100644
--- a/src/bin/pg_verifybackup/Makefile
+++ b/src/bin/pg_verifybackup/Makefile
@@ -38,7 +38,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_verifybackup$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_verifybackup$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_waldump/Makefile b/src/bin/pg_waldump/Makefile
index 0ecf582039..4c1ee64950 100644
--- a/src/bin/pg_waldump/Makefile
+++ b/src/bin/pg_waldump/Makefile
@@ -45,7 +45,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_waldump$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_waldump$(X) $(OBJS) $(RMGRDESCSOURCES) xlogreader.c xlogstats.c
 	rm -rf tmp_check
 
diff --git a/src/bin/pgbench/Makefile b/src/bin/pgbench/Makefile
index 68b6eb0376..987bf64df9 100644
--- a/src/bin/pgbench/Makefile
+++ b/src/bin/pgbench/Makefile
@@ -38,8 +38,6 @@ exprparse.c: BISONFLAGS += -d
 # Force these dependencies to be known even without dependency info built:
 exprparse.o exprscan.o: exprparse.h
 
-distprep: exprparse.c exprscan.c
-
 install: all installdirs
 	$(INSTALL_PROGRAM) pgbench$(X) '$(DESTDIR)$(bindir)/pgbench$(X)'
 
@@ -52,8 +50,6 @@ uninstall:
 clean distclean:
 	rm -f pgbench$(X) $(OBJS)
 	rm -rf tmp_check
-
-maintainer-clean: distclean
 	rm -f exprparse.h exprparse.c exprscan.c
 
 check:
diff --git a/src/bin/psql/Makefile b/src/bin/psql/Makefile
index 1f2bf0c6b0..8ad7c65446 100644
--- a/src/bin/psql/Makefile
+++ b/src/bin/psql/Makefile
@@ -62,8 +62,6 @@ psqlscanslash.c: FLEXFLAGS = -Cfe -p -p
 psqlscanslash.c: FLEX_NO_BACKUP=yes
 psqlscanslash.c: FLEX_FIX_WARNING=yes
 
-distprep: sql_help.h sql_help.c psqlscanslash.c
-
 install: all installdirs
 	$(INSTALL_PROGRAM) psql$(X) '$(DESTDIR)$(bindir)/psql$(X)'
 	$(INSTALL_DATA) $(srcdir)/psqlrc.sample '$(DESTDIR)$(datadir)/psqlrc.sample'
@@ -77,10 +75,6 @@ uninstall:
 clean distclean:
 	rm -f psql$(X) $(OBJS) lex.backup
 	rm -rf tmp_check
-
-# files removed here are supposed to be in the distribution tarball,
-# so do not clean them in the clean/distclean rules
-maintainer-clean: distclean
 	rm -f sql_help.h sql_help.c psqlscanslash.c
 
 check:
diff --git a/src/bin/scripts/Makefile b/src/bin/scripts/Makefile
index a7a9d0fea5..20db40b103 100644
--- a/src/bin/scripts/Makefile
+++ b/src/bin/scripts/Makefile
@@ -48,7 +48,7 @@ installdirs:
 uninstall:
 	rm -f $(addprefix '$(DESTDIR)$(bindir)'/, $(addsuffix $(X), $(PROGRAMS)))
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f $(addsuffix $(X), $(PROGRAMS)) $(addsuffix .o, $(PROGRAMS))
 	rm -f common.o $(WIN32RES)
 	rm -rf tmp_check
diff --git a/src/common/Makefile b/src/common/Makefile
index 113029bf7b..ec063c6e18 100644
--- a/src/common/Makefile
+++ b/src/common/Makefile
@@ -121,8 +121,6 @@ GEN_KEYWORDLIST_DEPS = $(TOOLSDIR)/gen_keywordlist.pl $(TOOLSDIR)/PerfectHash.pm
 
 all: libpgcommon.a libpgcommon_shlib.a libpgcommon_srv.a
 
-distprep: kwlist_d.h
-
 # libpgcommon is needed by some contrib
 install: all installdirs
 	$(INSTALL_STLIB) libpgcommon.a '$(DESTDIR)$(libdir)/libpgcommon.a'
@@ -188,10 +186,7 @@ RYU_OBJS = $(RYU_FILES) $(RYU_FILES:%.o=%_shlib.o) $(RYU_FILES:%.o=%_srv.o)
 
 $(RYU_OBJS): CFLAGS += $(PERMIT_DECLARATION_AFTER_STATEMENT)
 
-# kwlist_d.h is in the distribution tarball, so it is not cleaned here.
 clean distclean:
 	rm -f libpgcommon.a libpgcommon_shlib.a libpgcommon_srv.a
 	rm -f $(OBJS_FRONTEND) $(OBJS_SHLIB) $(OBJS_SRV)
-
-maintainer-clean: distclean
 	rm -f kwlist_d.h
diff --git a/src/common/unicode/Makefile b/src/common/unicode/Makefile
index 382da476cf..d6e427b582 100644
--- a/src/common/unicode/Makefile
+++ b/src/common/unicode/Makefile
@@ -68,5 +68,3 @@ clean:
 
 distclean: clean
 	rm -f UnicodeData.txt EastAsianWidth.txt CompositionExclusions.txt NormalizationTest.txt norm_test_table.h unicode_norm_table.h
-
-maintainer-clean: distclean
diff --git a/src/fe_utils/Makefile b/src/fe_utils/Makefile
index 456d6dd390..8accd5906d 100644
--- a/src/fe_utils/Makefile
+++ b/src/fe_utils/Makefile
@@ -48,8 +48,6 @@ psqlscan.c: FLEXFLAGS = -Cfe -p -p
 psqlscan.c: FLEX_NO_BACKUP=yes
 psqlscan.c: FLEX_FIX_WARNING=yes
 
-distprep: psqlscan.c
-
 # libpgfeutils could be useful to contrib, so install it
 install: all installdirs
 	$(INSTALL_STLIB) libpgfeutils.a '$(DESTDIR)$(libdir)/libpgfeutils.a'
@@ -62,8 +60,4 @@ uninstall:
 
 clean distclean:
 	rm -f libpgfeutils.a $(OBJS) lex.backup
-
-# psqlscan.c is supposed to be in the distribution tarball,
-# so do not clean it in the clean/distclean rules
-maintainer-clean: distclean
 	rm -f psqlscan.c
diff --git a/src/include/Makefile b/src/include/Makefile
index 5d213187e2..0dfe7d9e23 100644
--- a/src/include/Makefile
+++ b/src/include/Makefile
@@ -77,5 +77,5 @@ clean:
 	rm -f catalog/pg_*_d.h catalog/header-stamp
 	rm -f nodes/nodetags.h nodes/header-stamp
 
-distclean maintainer-clean: clean
+distclean: clean
 	rm -f pg_config.h pg_config_ext.h pg_config_os.h stamp-h stamp-ext-h
diff --git a/src/interfaces/ecpg/Makefile b/src/interfaces/ecpg/Makefile
index e4bbf7b8a8..3002bc3c1b 100644
--- a/src/interfaces/ecpg/Makefile
+++ b/src/interfaces/ecpg/Makefile
@@ -23,7 +23,7 @@ install-pgtypeslib-recurse install-ecpglib-recurse install-compatlib-recurse ins
 install-compatlib-recurse: install-ecpglib-recurse
 install-ecpglib-recurse: install-pgtypeslib-recurse
 
-clean distclean maintainer-clean:
+clean distclean:
 	$(MAKE) -C test clean
 
 checktcp: | temp-install
diff --git a/src/interfaces/ecpg/compatlib/Makefile b/src/interfaces/ecpg/compatlib/Makefile
index b9483fba08..695fd1a080 100644
--- a/src/interfaces/ecpg/compatlib/Makefile
+++ b/src/interfaces/ecpg/compatlib/Makefile
@@ -55,5 +55,3 @@ uninstall: uninstall-lib
 
 clean distclean: clean-lib
 	rm -f $(OBJS)
-
-maintainer-clean: distclean
diff --git a/src/interfaces/ecpg/ecpglib/Makefile b/src/interfaces/ecpg/ecpglib/Makefile
index 652e023405..103cce393a 100644
--- a/src/interfaces/ecpg/ecpglib/Makefile
+++ b/src/interfaces/ecpg/ecpglib/Makefile
@@ -66,5 +66,3 @@ uninstall: uninstall-lib
 
 clean distclean: clean-lib
 	rm -f $(OBJS)
-
-maintainer-clean: distclean
diff --git a/src/interfaces/ecpg/include/Makefile b/src/interfaces/ecpg/include/Makefile
index 9c68bf3c47..3476409cef 100644
--- a/src/interfaces/ecpg/include/Makefile
+++ b/src/interfaces/ecpg/include/Makefile
@@ -31,5 +31,5 @@ uninstall:
 	rm -f $(addprefix '$(DESTDIR)$(informix_esql_dir)'/, $(informix_headers))
 	rm -f '$(DESTDIR)$(includedir)'/$(notdir $(ecpg_config_h))
 
-distclean maintainer-clean:
+distclean:
 	rm -f ecpg_config.h stamp-h
diff --git a/src/interfaces/ecpg/pgtypeslib/Makefile b/src/interfaces/ecpg/pgtypeslib/Makefile
index b0e154eb15..e56700a12e 100644
--- a/src/interfaces/ecpg/pgtypeslib/Makefile
+++ b/src/interfaces/ecpg/pgtypeslib/Makefile
@@ -50,5 +50,3 @@ uninstall: uninstall-lib
 
 clean distclean: clean-lib
 	rm -f $(OBJS)
-
-maintainer-clean: distclean
diff --git a/src/interfaces/ecpg/preproc/Makefile b/src/interfaces/ecpg/preproc/Makefile
index 77ae9ab722..afd46cd17c 100644
--- a/src/interfaces/ecpg/preproc/Makefile
+++ b/src/interfaces/ecpg/preproc/Makefile
@@ -81,8 +81,6 @@ ecpg_keywords.o: ecpg_kwlist_d.h
 c_keywords.o: c_kwlist_d.h
 keywords.o: $(top_srcdir)/src/include/parser/kwlist.h
 
-distprep: preproc.y preproc.c preproc.h pgc.c c_kwlist_d.h ecpg_kwlist_d.h
-
 install: all installdirs
 	$(INSTALL_PROGRAM) ecpg$(X) '$(DESTDIR)$(bindir)'
 
@@ -92,11 +90,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/ecpg$(X)'
 
-# preproc.y, preproc.c, preproc.h, pgc.c, c_kwlist_d.h, and ecpg_kwlist_d.h
-# are in the distribution tarball, so they are not cleaned here.
 clean distclean:
 	rm -f *.o ecpg$(X)
 	rm -f typename.c
-
-maintainer-clean: distclean
 	rm -f preproc.y preproc.c preproc.h pgc.c c_kwlist_d.h ecpg_kwlist_d.h
diff --git a/src/interfaces/ecpg/test/Makefile b/src/interfaces/ecpg/test/Makefile
index cf841a3a5b..3769488f16 100644
--- a/src/interfaces/ecpg/test/Makefile
+++ b/src/interfaces/ecpg/test/Makefile
@@ -20,7 +20,7 @@ else
 abs_builddir := $(shell sh -c "pwd -W")
 endif
 
-all install installdirs uninstall distprep:
+all install installdirs uninstall:
 	$(MAKE) -C connect $@
 	$(MAKE) -C sql $@
 	$(MAKE) -C pgtypeslib $@
@@ -29,7 +29,7 @@ all install installdirs uninstall distprep:
 	$(MAKE) -C compat_oracle $@
 	$(MAKE) -C thread $@
 
-clean distclean maintainer-clean:
+clean distclean:
 	$(MAKE) -C connect $@
 	$(MAKE) -C sql $@
 	$(MAKE) -C pgtypeslib $@
diff --git a/src/interfaces/libpq/Makefile b/src/interfaces/libpq/Makefile
index 46653682b0..d0a66cfaa0 100644
--- a/src/interfaces/libpq/Makefile
+++ b/src/interfaces/libpq/Makefile
@@ -165,6 +165,3 @@ clean distclean: clean-lib
 	rm -f $(OBJS) pthread.h libpq-refs-stamp
 # Might be left over from a Win32 client-only build
 	rm -f pg_config_paths.h
-
-maintainer-clean: distclean
-	$(MAKE) -C test $@
diff --git a/src/interfaces/libpq/test/Makefile b/src/interfaces/libpq/test/Makefile
index 75ac08f943..4e17ec1514 100644
--- a/src/interfaces/libpq/test/Makefile
+++ b/src/interfaces/libpq/test/Makefile
@@ -20,5 +20,5 @@ all: $(PROGS)
 
 $(PROGS): $(WIN32RES)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f $(PROGS) *.o
diff --git a/src/makefiles/pgxs.mk b/src/makefiles/pgxs.mk
index 7ba8d5bc98..0de3737e78 100644
--- a/src/makefiles/pgxs.mk
+++ b/src/makefiles/pgxs.mk
@@ -391,7 +391,7 @@ ifdef MODULE_big
 clean: clean-lib
 endif
 
-distclean maintainer-clean: clean
+distclean: clean
 
 
 ifdef REGRESS
diff --git a/src/nls-global.mk b/src/nls-global.mk
index f21bd5ed55..dfff472cb3 100644
--- a/src/nls-global.mk
+++ b/src/nls-global.mk
@@ -171,7 +171,7 @@ all: all-po
 install: install-po
 installdirs: installdirs-po
 uninstall: uninstall-po
-clean distclean maintainer-clean: clean-po
+clean distclean: clean-po
 
 .PHONY: all-po install-po installdirs-po uninstall-po clean-po \
         init-po update-po
diff --git a/src/pl/plperl/GNUmakefile b/src/pl/plperl/GNUmakefile
index 51f8890d15..975f540b3e 100644
--- a/src/pl/plperl/GNUmakefile
+++ b/src/pl/plperl/GNUmakefile
@@ -127,7 +127,7 @@ installcheck: submake
 submake:
 	$(MAKE) -C $(top_builddir)/src/test/regress pg_regress$(X)
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 	rm -f SPI.c Util.c $(OBJS) perlchunks.h plperl_opmask.h
 	rm -rf $(pg_regress_clean_files)
 ifeq ($(PORTNAME), win32)
diff --git a/src/pl/plpgsql/src/Makefile b/src/pl/plpgsql/src/Makefile
index f7eb42d54f..dfb815212f 100644
--- a/src/pl/plpgsql/src/Makefile
+++ b/src/pl/plpgsql/src/Makefile
@@ -104,14 +104,7 @@ submake:
 	$(MAKE) -C $(top_builddir)/src/test/regress pg_regress$(X)
 
 
-distprep: pl_gram.h pl_gram.c plerrcodes.h pl_reserved_kwlist_d.h pl_unreserved_kwlist_d.h
-
-# pl_gram.c, pl_gram.h, plerrcodes.h, pl_reserved_kwlist_d.h, and
-# pl_unreserved_kwlist_d.h are in the distribution tarball, so they
-# are not cleaned here.
 clean distclean: clean-lib
 	rm -f $(OBJS)
 	rm -rf $(pg_regress_clean_files)
-
-maintainer-clean: distclean
 	rm -f pl_gram.c pl_gram.h plerrcodes.h pl_reserved_kwlist_d.h pl_unreserved_kwlist_d.h
diff --git a/src/pl/plpython/Makefile b/src/pl/plpython/Makefile
index 6b1865c240..ef0a5905ae 100644
--- a/src/pl/plpython/Makefile
+++ b/src/pl/plpython/Makefile
@@ -142,6 +142,7 @@ clean distclean: clean-lib
 ifeq ($(PORTNAME), win32)
 	rm -f python${pytverstr}.def
 endif
+	rm -f spiexceptions.h
 
 
 # Force this dependency to be known even without dependency info built:
@@ -149,8 +150,3 @@ plpy_plpymodule.o: spiexceptions.h
 
 spiexceptions.h: $(top_srcdir)/src/backend/utils/errcodes.txt generate-spiexceptions.pl
 	$(PERL) $(srcdir)/generate-spiexceptions.pl $< > $@
-
-distprep: spiexceptions.h
-
-maintainer-clean: distclean
-	rm -f spiexceptions.h
diff --git a/src/pl/tcl/Makefile b/src/pl/tcl/Makefile
index 314f9b2eec..ea52a2efc2 100644
--- a/src/pl/tcl/Makefile
+++ b/src/pl/tcl/Makefile
@@ -63,8 +63,6 @@ pltcl.o: pltclerrcodes.h
 pltclerrcodes.h: $(top_srcdir)/src/backend/utils/errcodes.txt generate-pltclerrcodes.pl
 	$(PERL) $(srcdir)/generate-pltclerrcodes.pl $< > $@
 
-distprep: pltclerrcodes.h
-
 install: all install-lib install-data
 
 installdirs: installdirs-lib
@@ -91,13 +89,10 @@ installcheck: submake
 submake:
 	$(MAKE) -C $(top_builddir)/src/test/regress pg_regress$(X)
 
-# pltclerrcodes.h is in the distribution tarball, so don't clean it here.
 clean distclean: clean-lib
 	rm -f $(OBJS)
 	rm -rf $(pg_regress_clean_files)
 ifeq ($(PORTNAME), win32)
 	rm -f $(tclwithver).def
 endif
-
-maintainer-clean: distclean
 	rm -f pltclerrcodes.h
diff --git a/src/port/Makefile b/src/port/Makefile
index f205c2c9c5..4320dee0d1 100644
--- a/src/port/Makefile
+++ b/src/port/Makefile
@@ -154,6 +154,6 @@ pg_config_paths.h: $(top_builddir)/src/Makefile.global
 	echo "#define HTMLDIR \"$(htmldir)\"" >>$@
 	echo "#define MANDIR \"$(mandir)\"" >>$@
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f libpgport.a libpgport_shlib.a libpgport_srv.a
 	rm -f $(OBJS) $(OBJS_SHLIB) $(OBJS_SRV) pg_config_paths.h
diff --git a/src/test/authentication/Makefile b/src/test/authentication/Makefile
index 46fa72052d..a48ce39aaf 100644
--- a/src/test/authentication/Makefile
+++ b/src/test/authentication/Makefile
@@ -19,5 +19,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/test/examples/Makefile b/src/test/examples/Makefile
index a67f456904..e72d058e0c 100644
--- a/src/test/examples/Makefile
+++ b/src/test/examples/Makefile
@@ -18,5 +18,5 @@ PROGS = testlibpq testlibpq2 testlibpq3 testlibpq4 testlo testlo64
 
 all: $(PROGS)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f $(PROGS) *.o
diff --git a/src/test/icu/Makefile b/src/test/icu/Makefile
index 033b0d03cc..c4fc8cdb8c 100644
--- a/src/test/icu/Makefile
+++ b/src/test/icu/Makefile
@@ -21,5 +21,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/test/isolation/Makefile b/src/test/isolation/Makefile
index b8738b7c1b..8f5192fb37 100644
--- a/src/test/isolation/Makefile
+++ b/src/test/isolation/Makefile
@@ -43,8 +43,6 @@ pg_isolation_regress$(X): isolation_main.o pg_regress.o $(WIN32RES)
 isolationtester$(X): $(OBJS) | submake-libpq submake-libpgport
 	$(CC) $(CFLAGS) $^ $(libpq_pgport) $(LDFLAGS) $(LDFLAGS_EX) $(LIBS) -o $@
 
-distprep: specparse.c specscanner.c
-
 # See notes in src/backend/parser/Makefile about the following two rules
 specparse.h: specparse.c
 	touch $@
@@ -60,8 +58,6 @@ clean distclean:
 	rm -f isolationtester$(X) pg_isolation_regress$(X) $(OBJS) isolation_main.o
 	rm -f pg_regress.o
 	rm -rf $(pg_regress_clean_files)
-
-maintainer-clean: distclean
 	rm -f specparse.h specparse.c specscanner.c
 
 installcheck: all
diff --git a/src/test/kerberos/Makefile b/src/test/kerberos/Makefile
index f460d2c0e7..44da65611e 100644
--- a/src/test/kerberos/Makefile
+++ b/src/test/kerberos/Makefile
@@ -24,5 +24,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/test/ldap/Makefile b/src/test/ldap/Makefile
index 73bc878ea8..d4305ed5eb 100644
--- a/src/test/ldap/Makefile
+++ b/src/test/ldap/Makefile
@@ -21,5 +21,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/test/locale/Makefile b/src/test/locale/Makefile
index 7ba096b542..a40c67af07 100644
--- a/src/test/locale/Makefile
+++ b/src/test/locale/Makefile
@@ -10,7 +10,7 @@ DIRS = de_DE.ISO8859-1 gr_GR.ISO8859-7 koi8-r koi8-to-win1251
 
 all: $(PROGS)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f $(PROGS) *.o
 	rm -rf tmp_check
 	for d in $(DIRS); do \
diff --git a/src/test/recovery/Makefile b/src/test/recovery/Makefile
index c60314d195..49f1d1c118 100644
--- a/src/test/recovery/Makefile
+++ b/src/test/recovery/Makefile
@@ -25,5 +25,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/test/regress/GNUmakefile b/src/test/regress/GNUmakefile
index 38c3a1f85b..388f2700bd 100644
--- a/src/test/regress/GNUmakefile
+++ b/src/test/regress/GNUmakefile
@@ -146,7 +146,7 @@ bigcheck: all | temp-install
 ## Clean up
 ##
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 # things built by `all' target
 	rm -f $(OBJS) refint$(DLSUFFIX) autoinc$(DLSUFFIX)
 	rm -f pg_regress_main.o pg_regress.o pg_regress$(X)
diff --git a/src/test/ssl/Makefile b/src/test/ssl/Makefile
index af1e06e949..2d7c69068f 100644
--- a/src/test/ssl/Makefile
+++ b/src/test/ssl/Makefile
@@ -23,7 +23,7 @@ export OPENSSL with_ssl
 sslfiles sslfiles-clean:
 	$(MAKE) -f $(srcdir)/sslfiles.mk $@
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
 	$(MAKE) -f $(srcdir)/sslfiles.mk $@
 
diff --git a/src/test/ssl/sslfiles.mk b/src/test/ssl/sslfiles.mk
index f7ababe42c..62b2272183 100644
--- a/src/test/ssl/sslfiles.mk
+++ b/src/test/ssl/sslfiles.mk
@@ -269,6 +269,6 @@ sslfiles-clean:
 # clean targets will be run during a "standard" recursive clean run from the
 # main build tree. The sslfiles-clean target must be run explicitly from this
 # directory.
-.PHONY: clean distclean maintainer-clean
-clean distclean maintainer-clean:
+.PHONY: clean distclean
+clean distclean:
 	rm -rf ssl/*.old ssl/new_certs_dir ssl/client*_tmp.key
diff --git a/src/test/subscription/Makefile b/src/test/subscription/Makefile
index 99d1fe012d..36475ffabc 100644
--- a/src/test/subscription/Makefile
+++ b/src/test/subscription/Makefile
@@ -23,5 +23,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/timezone/Makefile b/src/timezone/Makefile
index fbbaae4cc5..c85e831247 100644
--- a/src/timezone/Makefile
+++ b/src/timezone/Makefile
@@ -75,5 +75,5 @@ ifeq (,$(with_system_tzdata))
 endif
 	$(MAKE) -C tznames $@
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f zic$(X) $(ZICOBJS) abbrevs.txt
diff --git a/src/tools/ifaddrs/Makefile b/src/tools/ifaddrs/Makefile
index e74d754769..ef5e8f0e0e 100644
--- a/src/tools/ifaddrs/Makefile
+++ b/src/tools/ifaddrs/Makefile
@@ -24,5 +24,5 @@ all: test_ifaddrs
 test_ifaddrs: test_ifaddrs.o $(libpq_backend_dir)/ifaddr.o
 	$(CC) $(CFLAGS) test_ifaddrs.o $(libpq_backend_dir)/ifaddr.o $(LDFLAGS) $(LDFLAGS_EX) $(LIBS) -o $@$(X)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f test_ifaddrs$(X) $(OBJS)
diff --git a/src/tools/pg_bsd_indent/Makefile b/src/tools/pg_bsd_indent/Makefile
index d176ceb326..ce5d815f07 100644
--- a/src/tools/pg_bsd_indent/Makefile
+++ b/src/tools/pg_bsd_indent/Makefile
@@ -39,7 +39,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_bsd_indent$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_bsd_indent$(X) $(OBJS)
 	rm -rf log/ tmp_check/
 

base-commit: 00f2a2556c9b23050e4f987e5d563b6856b83fc2
-- 
2.41.0

From 5b5e46ea28f4911408eb40936e814b4a05281baa Mon Sep 17 00:00:00 2001
From: Peter Eisentraut <peter@eisentraut.org>
Date: Fri, 14 Jul 2023 10:53:40 +0200
Subject: [PATCH v3] Remove distprep

A PostgreSQL release tarball contains a number of prebuilt files, in
particular files produced by bison, flex, perl, and well as html and
man documentation.  We have done this consistent with established
practice at the time to not require these tools for building from a
tarball.  Some of these tools were hard to get, or get the right
version of, from time to time, and shipping the prebuilt output was a
convenience to users.

Now this has at least two problems:

One, we have to make the build system(s) work in two modes: Building
from a git checkout and building from a tarball.  This is pretty
complicated, but it works so far for autoconf/make.  It does not
currently work for meson; you can currently only build with meson from
a git checkout.  Making meson builds work from a tarball seems very
difficult or impossible.  One particular problem is that since meson
requires a separate build directory, we cannot make the build update
files like gram.h in the source tree.  So if you were to build from a
tarball and update gram.y, you will have a gram.h in the source tree
and one in the build tree, but the way things work is that the
compiler will always use the one in the source tree.  So you cannot,
for example, make any gram.y changes when building from a tarball.
This seems impossible to fix in a non-horrible way.

Second, there is increased interest nowadays in precisely tracking the
origin of software.  We can reasonably track contributions into the
git tree, and users can reasonably track the path from a tarball to
packages and downloads and installs.  But what happens between the git
tree and the tarball is obscure and in some cases non-reproducible.

The solution for both of these issues is to get rid of the step that
adds prebuilt files to the tarball.  The tarball now only contains
what is in the git tree (*).  Getting the additional build
dependencies is no longer a problem nowadays, and the complications to
keep these dual build modes working are significant.  And of course we
want to get the meson build system working universally.

This commit removes the make distprep target altogether.  The make
dist target continues to do its job, it just doesn't call distprep
anymore.

(*) - The tarball also contains the INSTALL file that is built at make
dist time, but not by distprep.  This is unchanged for now.

The make maintainer-clean target, whose job it is to remove the
prebuilt files in addition to what make distclean does, is now just an
alias to make distprep.  (In practice, it is probably obsolete given
that git clean is available.)

The following programs are now hard build requirements in configure
(they were already required by meson.build):

- bison
- flex
- perl
---
 GNUmakefile.in                                |  6 +-
 config/perl.m4                                |  9 +-
 config/programs.m4                            | 21 +----
 configure                                     | 62 ++------------
 contrib/cube/Makefile                         |  7 +-
 contrib/fuzzystrmatch/Makefile                |  9 +-
 contrib/seg/Makefile                          |  7 +-
 doc/Makefile                                  |  2 +-
 doc/src/Makefile                              |  2 +-
 doc/src/sgml/Makefile                         |  9 +-
 doc/src/sgml/installation.sgml                | 83 ++++++++-----------
 meson.build                                   |  2 +-
 src/Makefile                                  |  5 +-
 src/Makefile.global.in                        | 30 +++----
 src/backend/Makefile                          | 65 ++-------------
 src/backend/bootstrap/Makefile                |  6 +-
 src/backend/catalog/Makefile                  | 14 +---
 src/backend/jit/llvm/Makefile                 |  2 +-
 src/backend/nls.mk                            |  2 +-
 src/backend/nodes/Makefile                    | 12 +--
 src/backend/parser/Makefile                   |  8 +-
 src/backend/port/Makefile                     |  2 +-
 src/backend/replication/Makefile              | 10 ++-
 .../replication/libpqwalreceiver/Makefile     |  2 +-
 src/backend/replication/pgoutput/Makefile     |  2 +-
 src/backend/snowball/Makefile                 |  4 -
 src/backend/storage/lmgr/Makefile             |  4 +-
 src/backend/utils/Makefile                    | 28 ++-----
 src/backend/utils/activity/Makefile           |  2 +-
 src/backend/utils/adt/Makefile                |  5 +-
 src/backend/utils/mb/Makefile                 |  2 +-
 src/backend/utils/mb/Unicode/Makefile         |  2 -
 src/backend/utils/mb/conversion_procs/proc.mk |  2 +-
 src/backend/utils/misc/Makefile               |  3 +-
 src/bin/initdb/Makefile                       |  2 +-
 src/bin/pg_amcheck/Makefile                   |  2 +-
 src/bin/pg_archivecleanup/Makefile            |  2 +-
 src/bin/pg_basebackup/Makefile                |  2 +-
 src/bin/pg_checksums/Makefile                 |  2 +-
 src/bin/pg_config/Makefile                    |  2 +-
 src/bin/pg_controldata/Makefile               |  2 +-
 src/bin/pg_ctl/Makefile                       |  2 +-
 src/bin/pg_dump/Makefile                      |  2 +-
 src/bin/pg_resetwal/Makefile                  |  2 +-
 src/bin/pg_rewind/Makefile                    |  2 +-
 src/bin/pg_test_fsync/Makefile                |  2 +-
 src/bin/pg_test_timing/Makefile               |  2 +-
 src/bin/pg_upgrade/Makefile                   |  2 +-
 src/bin/pg_verifybackup/Makefile              |  2 +-
 src/bin/pg_waldump/Makefile                   |  2 +-
 src/bin/pgbench/Makefile                      |  4 -
 src/bin/psql/Makefile                         |  6 --
 src/bin/scripts/Makefile                      |  2 +-
 src/common/Makefile                           |  5 --
 src/common/unicode/Makefile                   |  2 -
 src/fe_utils/Makefile                         |  6 --
 src/include/Makefile                          |  2 +-
 src/interfaces/ecpg/Makefile                  |  2 +-
 src/interfaces/ecpg/compatlib/Makefile        |  2 -
 src/interfaces/ecpg/ecpglib/Makefile          |  2 -
 src/interfaces/ecpg/include/Makefile          |  2 +-
 src/interfaces/ecpg/pgtypeslib/Makefile       |  2 -
 src/interfaces/ecpg/preproc/Makefile          |  6 --
 src/interfaces/ecpg/test/Makefile             |  4 +-
 src/interfaces/libpq/Makefile                 |  3 -
 src/interfaces/libpq/test/Makefile            |  2 +-
 src/makefiles/pgxs.mk                         |  2 +-
 src/nls-global.mk                             |  2 +-
 src/pl/plperl/GNUmakefile                     |  2 +-
 src/pl/plpgsql/src/Makefile                   |  7 --
 src/pl/plpython/Makefile                      |  6 +-
 src/pl/tcl/Makefile                           |  5 --
 src/port/Makefile                             |  2 +-
 src/test/authentication/Makefile              |  2 +-
 src/test/examples/Makefile                    |  2 +-
 src/test/icu/Makefile                         |  2 +-
 src/test/isolation/Makefile                   |  4 -
 src/test/kerberos/Makefile                    |  2 +-
 src/test/ldap/Makefile                        |  2 +-
 src/test/locale/Makefile                      |  2 +-
 src/test/recovery/Makefile                    |  2 +-
 src/test/regress/GNUmakefile                  |  2 +-
 src/test/ssl/Makefile                         |  2 +-
 src/test/ssl/sslfiles.mk                      |  4 +-
 src/test/subscription/Makefile                |  2 +-
 src/timezone/Makefile                         |  2 +-
 src/tools/ifaddrs/Makefile                    |  2 +-
 src/tools/pg_bsd_indent/Makefile              |  2 +-
 88 files changed, 168 insertions(+), 407 deletions(-)

diff --git a/GNUmakefile.in b/GNUmakefile.in
index 9c18c56233..80db4c73f8 100644
--- a/GNUmakefile.in
+++ b/GNUmakefile.in
@@ -41,7 +41,7 @@ install-world-bin-contrib-recurse: install-world-bin-src-recurse
 
 $(call recurse,installdirs uninstall init-po update-po,doc src config)
 
-$(call recurse,distprep coverage,doc src config contrib)
+$(call recurse,coverage,doc src config contrib)
 
 # clean, distclean, etc should apply to contrib too, even though
 # it's not built by default
@@ -53,7 +53,7 @@ clean:
 
 # Important: distclean `src' last, otherwise Makefile.global
 # will be gone too soon.
-distclean maintainer-clean:
+distclean:
 	$(MAKE) -C doc $@
 	$(MAKE) -C contrib $@
 	$(MAKE) -C config $@
@@ -109,7 +109,6 @@ distdir:
 	      || cp "$(top_srcdir)/$$file" "$(distdir)/$$file"; \
 	  fi || exit; \
 	done
-	$(MAKE) -C $(distdir) distprep
 	$(MAKE) -C $(distdir)/doc/src/sgml/ INSTALL
 	cp $(distdir)/doc/src/sgml/INSTALL $(distdir)/
 	$(MAKE) -C $(distdir) distclean
@@ -122,7 +121,6 @@ distcheck: dist
 	install_prefix=`cd $(dummy) && pwd`; \
 	cd $(distdir) \
 	&& ./configure --prefix="$$install_prefix"
-	$(MAKE) -C $(distdir) -q distprep
 	$(MAKE) -C $(distdir)
 	$(MAKE) -C $(distdir) install
 	$(MAKE) -C $(distdir) uninstall
diff --git a/config/perl.m4 b/config/perl.m4
index 8126e79f67..1a3bb55649 100644
--- a/config/perl.m4
+++ b/config/perl.m4
@@ -13,19 +13,14 @@ if test "$PERL"; then
   if echo "$pgac_perl_version" | sed ['s/[.a-z_]/ /g'] | \
     $AWK '{ if ([$]1 == 5 && ([$]2 >= 14)) exit 1; else exit 0;}'
   then
-    AC_MSG_WARN([
+    AC_MSG_ERROR([
 *** The installed version of Perl, $PERL, is too old to use with PostgreSQL.
 *** Perl version 5.14 or later is required, but this is $pgac_perl_version.])
-    PERL=""
   fi
 fi
 
 if test -z "$PERL"; then
-  AC_MSG_WARN([
-*** Without Perl you will not be able to build PostgreSQL from Git.
-*** You can obtain Perl from any CPAN mirror site.
-*** (If you are using the official distribution of PostgreSQL then you do not
-*** need to worry about this, because the Perl output is pre-generated.)])
+  AC_MSG_ERROR([Perl not found])
 fi
 ])# PGAC_PATH_PERL
 
diff --git a/config/programs.m4 b/config/programs.m4
index 8a118b4e03..490ec9fe9f 100644
--- a/config/programs.m4
+++ b/config/programs.m4
@@ -33,10 +33,9 @@ if test "$BISON"; then
   AC_MSG_NOTICE([using $pgac_bison_version])
   if echo "$pgac_bison_version" | $AWK '{ if ([$]4 < 2.3) exit 0; else exit 1;}'
   then
-    AC_MSG_WARN([
+    AC_MSG_ERROR([
 *** The installed version of Bison, $BISON, is too old to use with PostgreSQL.
 *** Bison version 2.3 or later is required, but this is $pgac_bison_version.])
-    BISON=""
   fi
   # Bison >=3.0 issues warnings about %name-prefix="base_yy", instead
   # of the now preferred %name-prefix "base_yy", but the latter
@@ -49,12 +48,7 @@ if test "$BISON"; then
 fi
 
 if test -z "$BISON"; then
-  AC_MSG_WARN([
-*** Without Bison you will not be able to build PostgreSQL from Git nor
-*** change any of the parser definition files.  You can obtain Bison from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this, because the Bison
-*** output is pre-generated.)])
+  AC_MSG_ERROR([bison not found])
 fi
 dnl We don't need AC_SUBST(BISON) because PGAC_PATH_PROGS did it
 AC_SUBST(BISONFLAGS)
@@ -95,7 +89,7 @@ else
             pgac_cv_path_flex=$pgac_candidate
             break 2
           else
-            AC_MSG_WARN([
+            AC_MSG_ERROR([
 *** The installed version of Flex, $pgac_candidate, is too old to use with PostgreSQL.
 *** Flex version 2.5.35 or later is required, but this is $pgac_flex_version.])
           fi
@@ -109,14 +103,7 @@ fi
 ])[]dnl AC_CACHE_CHECK
 
 if test x"$pgac_cv_path_flex" = x"no"; then
-  AC_MSG_WARN([
-*** Without Flex you will not be able to build PostgreSQL from Git nor
-*** change any of the scanner definition files.  You can obtain Flex from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this because the Flex
-*** output is pre-generated.)])
-
-  FLEX=
+  AC_MSG_ERROR([flex not found])
 else
   FLEX=$pgac_cv_path_flex
   pgac_flex_version=`$FLEX --version 2>/dev/null`
diff --git a/configure b/configure
index 2e518c8007..802fc9edc4 100755
--- a/configure
+++ b/configure
@@ -10160,13 +10160,9 @@ if test "$BISON"; then
 $as_echo "$as_me: using $pgac_bison_version" >&6;}
   if echo "$pgac_bison_version" | $AWK '{ if ($4 < 2.3) exit 0; else exit 1;}'
   then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** The installed version of Bison, $BISON, is too old to use with PostgreSQL.
-*** Bison version 2.3 or later is required, but this is $pgac_bison_version." >&5
-$as_echo "$as_me: WARNING:
+    as_fn_error $? "
 *** The installed version of Bison, $BISON, is too old to use with PostgreSQL.
-*** Bison version 2.3 or later is required, but this is $pgac_bison_version." >&2;}
-    BISON=""
+*** Bison version 2.3 or later is required, but this is $pgac_bison_version." "$LINENO" 5
   fi
   # Bison >=3.0 issues warnings about %name-prefix="base_yy", instead
   # of the now preferred %name-prefix "base_yy", but the latter
@@ -10179,18 +10175,7 @@ $as_echo "$as_me: WARNING:
 fi
 
 if test -z "$BISON"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** Without Bison you will not be able to build PostgreSQL from Git nor
-*** change any of the parser definition files.  You can obtain Bison from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this, because the Bison
-*** output is pre-generated.)" >&5
-$as_echo "$as_me: WARNING:
-*** Without Bison you will not be able to build PostgreSQL from Git nor
-*** change any of the parser definition files.  You can obtain Bison from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this, because the Bison
-*** output is pre-generated.)" >&2;}
+  as_fn_error $? "bison not found" "$LINENO" 5
 fi
 
 
@@ -10223,12 +10208,9 @@ else
             pgac_cv_path_flex=$pgac_candidate
             break 2
           else
-            { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** The installed version of Flex, $pgac_candidate, is too old to use with PostgreSQL.
-*** Flex version 2.5.35 or later is required, but this is $pgac_flex_version." >&5
-$as_echo "$as_me: WARNING:
+            as_fn_error $? "
 *** The installed version of Flex, $pgac_candidate, is too old to use with PostgreSQL.
-*** Flex version 2.5.35 or later is required, but this is $pgac_flex_version." >&2;}
+*** Flex version 2.5.35 or later is required, but this is $pgac_flex_version." "$LINENO" 5
           fi
         fi
       fi
@@ -10242,20 +10224,7 @@ fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv_path_flex" >&5
 $as_echo "$pgac_cv_path_flex" >&6; }
 if test x"$pgac_cv_path_flex" = x"no"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** Without Flex you will not be able to build PostgreSQL from Git nor
-*** change any of the scanner definition files.  You can obtain Flex from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this because the Flex
-*** output is pre-generated.)" >&5
-$as_echo "$as_me: WARNING:
-*** Without Flex you will not be able to build PostgreSQL from Git nor
-*** change any of the scanner definition files.  You can obtain Flex from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this because the Flex
-*** output is pre-generated.)" >&2;}
-
-  FLEX=
+  as_fn_error $? "flex not found" "$LINENO" 5
 else
   FLEX=$pgac_cv_path_flex
   pgac_flex_version=`$FLEX --version 2>/dev/null`
@@ -10329,27 +10298,14 @@ $as_echo "$as_me: using perl $pgac_perl_version" >&6;}
   if echo "$pgac_perl_version" | sed 's/[.a-z_]/ /g' | \
     $AWK '{ if ($1 == 5 && ($2 >= 14)) exit 1; else exit 0;}'
   then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** The installed version of Perl, $PERL, is too old to use with PostgreSQL.
-*** Perl version 5.14 or later is required, but this is $pgac_perl_version." >&5
-$as_echo "$as_me: WARNING:
+    as_fn_error $? "
 *** The installed version of Perl, $PERL, is too old to use with PostgreSQL.
-*** Perl version 5.14 or later is required, but this is $pgac_perl_version." >&2;}
-    PERL=""
+*** Perl version 5.14 or later is required, but this is $pgac_perl_version." "$LINENO" 5
   fi
 fi
 
 if test -z "$PERL"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** Without Perl you will not be able to build PostgreSQL from Git.
-*** You can obtain Perl from any CPAN mirror site.
-*** (If you are using the official distribution of PostgreSQL then you do not
-*** need to worry about this, because the Perl output is pre-generated.)" >&5
-$as_echo "$as_me: WARNING:
-*** Without Perl you will not be able to build PostgreSQL from Git.
-*** You can obtain Perl from any CPAN mirror site.
-*** (If you are using the official distribution of PostgreSQL then you do not
-*** need to worry about this, because the Perl output is pre-generated.)" >&2;}
+  as_fn_error $? "Perl not found" "$LINENO" 5
 fi
 
 if test "$with_perl" = yes; then
diff --git a/contrib/cube/Makefile b/contrib/cube/Makefile
index 4fd19aac35..dfb0d806e4 100644
--- a/contrib/cube/Makefile
+++ b/contrib/cube/Makefile
@@ -18,6 +18,8 @@ REGRESS = cube cube_sci
 
 SHLIB_LINK += $(filter -lm, $(LIBS))
 
+EXTRA_CLEAN = cubeparse.h cubeparse.c cubescan.c
+
 ifdef USE_PGXS
 PG_CONFIG = pg_config
 PGXS := $(shell $(PG_CONFIG) --pgxs)
@@ -37,8 +39,3 @@ cubeparse.c: BISONFLAGS += -d
 
 # Force these dependencies to be known even without dependency info built:
 cubeparse.o cubescan.o: cubeparse.h
-
-distprep: cubeparse.c cubescan.c
-
-maintainer-clean:
-	rm -f cubeparse.h cubeparse.c cubescan.c
diff --git a/contrib/fuzzystrmatch/Makefile b/contrib/fuzzystrmatch/Makefile
index e68bc0e33f..04c83a34a7 100644
--- a/contrib/fuzzystrmatch/Makefile
+++ b/contrib/fuzzystrmatch/Makefile
@@ -15,6 +15,8 @@ PGFILEDESC = "fuzzystrmatch - similarities and distance between strings"
 
 REGRESS = fuzzystrmatch fuzzystrmatch_utf8
 
+EXTRA_CLEAN = daitch_mokotoff.h
+
 ifdef USE_PGXS
 PG_CONFIG = pg_config
 PGXS := $(shell $(PG_CONFIG) --pgxs)
@@ -31,10 +33,3 @@ daitch_mokotoff.o: daitch_mokotoff.h
 
 daitch_mokotoff.h: daitch_mokotoff_header.pl
 	$(PERL) $< $@
-
-# daitch_mokotoff.h is included in tarballs, so it has to be made by
-# "distprep" and not cleaned except by "maintainer-clean".
-distprep: daitch_mokotoff.h
-
-maintainer-clean:
-	rm -f daitch_mokotoff.h
diff --git a/contrib/seg/Makefile b/contrib/seg/Makefile
index a1e49bf051..132ec8dbfe 100644
--- a/contrib/seg/Makefile
+++ b/contrib/seg/Makefile
@@ -16,7 +16,7 @@ HEADERS = segdata.h
 
 REGRESS = security seg
 
-EXTRA_CLEAN = y.tab.c y.tab.h
+EXTRA_CLEAN = segparse.h segparse.c segscan.c
 
 ifdef USE_PGXS
 PG_CONFIG = pg_config
@@ -38,8 +38,3 @@ segparse.c: BISONFLAGS += -d
 
 # Force these dependencies to be known even without dependency info built:
 segparse.o segscan.o: segparse.h
-
-distprep: segparse.c segscan.c
-
-maintainer-clean:
-	rm -f segparse.h segparse.c segscan.c
diff --git a/doc/Makefile b/doc/Makefile
index aee3cc0965..24370fc903 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -12,5 +12,5 @@ subdir = doc
 top_builddir = ..
 include $(top_builddir)/src/Makefile.global
 
-all distprep html man install installdirs uninstall clean distclean maintainer-clean:
+all html man install installdirs uninstall clean distclean:
 	$(MAKE) -C src $@
diff --git a/doc/src/Makefile b/doc/src/Makefile
index 30d883815a..2ed02084ff 100644
--- a/doc/src/Makefile
+++ b/doc/src/Makefile
@@ -4,5 +4,5 @@ subdir = doc/src
 top_builddir = ../..
 include $(top_builddir)/src/Makefile.global
 
-all distprep html man install installdirs uninstall clean distclean maintainer-clean:
+all html man install installdirs uninstall clean distclean:
 	$(MAKE) -C sgml $@
diff --git a/doc/src/sgml/Makefile b/doc/src/sgml/Makefile
index 1e55e531db..82d57674a2 100644
--- a/doc/src/sgml/Makefile
+++ b/doc/src/sgml/Makefile
@@ -7,8 +7,7 @@
 #----------------------------------------------------------------------------
 
 # This makefile is for building and installing the documentation.
-# When a release tarball is created, the documentation files are
-# prepared using the distprep target.  In Git-based trees these files
+# In Git-based trees these files
 # don't exist, unless explicitly built, so we skip the installation in
 # that case.
 
@@ -28,8 +27,6 @@ include $(top_builddir)/src/Makefile.global
 
 all: html man
 
-distprep: html distprep-man
-
 
 ifndef DBTOEPUB
 DBTOEPUB = $(missing) dbtoepub
@@ -77,7 +74,7 @@ postgres-full.xml: postgres.sgml $(ALLSGML)
 ## Man pages
 ##
 
-man distprep-man: man-stamp
+man: man-stamp
 
 man-stamp: stylesheet-man.xsl postgres-full.xml
 	$(XSLTPROC) $(XMLINCLUDE) $(XSLTPROCFLAGS) $(XSLTPROC_MAN_FLAGS) $^
@@ -305,8 +302,6 @@ clean:
 	rm -f *.texixml *.texi *.info db2texi.refs
 
 distclean: clean
-
-maintainer-clean: distclean
 # HTML
 	rm -fr html/ html-stamp
 # man
diff --git a/doc/src/sgml/installation.sgml b/doc/src/sgml/installation.sgml
index ac8eee47c6..8eb928903e 100644
--- a/doc/src/sgml/installation.sgml
+++ b/doc/src/sgml/installation.sgml
@@ -72,8 +72,7 @@ <title>Requirements</title>
 
       Alternatively, <productname>PostgreSQL</productname> can be built using
       <ulink url="https://mesonbuild.com/">Meson</ulink>.  This is currently
-      experimental and only works when building from a Git checkout (not from
-      a distribution tarball).  If you choose to use
+      experimental.  If you choose to use
       <application>Meson</application>, then you don't need
       <acronym>GNU</acronym> <application>make</application>, but the other
       requirements below still apply.
@@ -102,6 +101,41 @@ <title>Requirements</title>
      </para>
     </listitem>
 
+    <listitem>
+     <para>
+      <indexterm>
+       <primary>flex</primary>
+      </indexterm>
+      <indexterm>
+       <primary>lex</primary>
+      </indexterm>
+      <indexterm>
+       <primary>bison</primary>
+      </indexterm>
+      <indexterm>
+       <primary>yacc</primary>
+      </indexterm>
+
+      <application>Flex</application> 2.5.35 or later and
+      <application>Bison</application> 2.3 or later are required.  Other
+      <application>lex</application> and <application>yacc</application>
+      programs cannot be used.
+     </para>
+    </listitem>
+
+    <listitem>
+     <para>
+      <indexterm>
+       <primary>perl</primary>
+      </indexterm>
+
+      <application>Perl</application> 5.14 or later is needed during the build
+      process and to run some test suites.  (This requirement is separate from
+      the requirements for building <application>PL/Perl</application>; see
+      below.)
+     </para>
+    </listitem>
+
     <listitem>
      <para>
       <indexterm>
@@ -315,51 +349,6 @@ <title>Requirements</title>
    </itemizedlist>
   </para>
 
-  <para>
-   If you are building from a <productname>Git</productname> tree instead of
-   using a released source package, or if you want to do server development,
-   you also need the following packages:
-
-   <itemizedlist>
-    <listitem>
-     <para>
-      <indexterm>
-       <primary>flex</primary>
-      </indexterm>
-      <indexterm>
-       <primary>lex</primary>
-      </indexterm>
-      <indexterm>
-       <primary>bison</primary>
-      </indexterm>
-      <indexterm>
-       <primary>yacc</primary>
-      </indexterm>
-
-      <application>Flex</application> and <application>Bison</application>
-      are needed to build from a Git checkout, or if you changed the actual
-      scanner and parser definition files. If you need them, be sure
-      to get <application>Flex</application> 2.5.35 or later and
-      <application>Bison</application> 2.3 or later. Other <application>lex</application>
-      and <application>yacc</application> programs cannot be used.
-     </para>
-    </listitem>
-    <listitem>
-     <para>
-      <indexterm>
-       <primary>perl</primary>
-      </indexterm>
-
-      <application>Perl</application> 5.14 or later is needed to build from a Git checkout,
-      or if you changed the input files for any of the build steps that
-      use Perl scripts.  If building on Windows you will need
-      <application>Perl</application> in any case.  <application>Perl</application> is
-      also required to run some test suites.
-     </para>
-    </listitem>
-   </itemizedlist>
-  </para>
-
   <para>
    If you need to get a <acronym>GNU</acronym> package, you can find
    it at your local <acronym>GNU</acronym> mirror site (see <ulink
diff --git a/meson.build b/meson.build
index 04ea348852..0f426d68d6 100644
--- a/meson.build
+++ b/meson.build
@@ -72,7 +72,7 @@ configure. Alternatively use a separate check out for meson based builds.
 @0@
 ****'''
 if fs.exists(meson.current_source_dir() / 'src' / 'include' / 'pg_config.h')
-  errmsg_cleanup = 'To clean up, run make maintainer-clean in the source tree.'
+  errmsg_cleanup = 'To clean up, run make distclean in the source tree.'
   error(errmsg_nonclean_base.format(errmsg_cleanup))
 endif
 
diff --git a/src/Makefile b/src/Makefile
index 94649c36c7..2f31a2f20a 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -59,16 +59,13 @@ uninstall: uninstall-local
 uninstall-local:
 	rm -f $(addprefix '$(DESTDIR)$(pgxsdir)/$(subdir)'/, Makefile.global Makefile.port Makefile.shlib nls-global.mk)
 
-distprep:
-	$(MAKE) -C test/isolation $@
-
 clean:
 	$(MAKE) -C test $@
 	$(MAKE) -C tutorial NO_PGXS=1 $@
 	$(MAKE) -C test/isolation $@
 	$(MAKE) -C tools/pg_bsd_indent $@
 
-distclean maintainer-clean:
+distclean:
 	$(MAKE) -C test $@
 	$(MAKE) -C tutorial NO_PGXS=1 $@
 	$(MAKE) -C test/isolation $@
diff --git a/src/Makefile.global.in b/src/Makefile.global.in
index df9f721a41..2159692439 100644
--- a/src/Makefile.global.in
+++ b/src/Makefile.global.in
@@ -19,11 +19,11 @@
 #
 # Meta configuration
 
-standard_targets = all install installdirs uninstall distprep clean distclean maintainer-clean coverage check checkprep installcheck init-po update-po
+standard_targets = all install installdirs uninstall clean distclean coverage check checkprep installcheck init-po update-po
 # these targets should recurse even into subdirectories not being built:
-standard_always_targets = distprep clean distclean maintainer-clean
+standard_always_targets = clean distclean
 
-.PHONY: $(standard_targets) install-strip html man installcheck-parallel update-unicode
+.PHONY: $(standard_targets) maintainer-clean install-strip html man installcheck-parallel update-unicode
 
 # make `all' the default target
 all:
@@ -35,6 +35,8 @@ all:
 # Never delete any intermediate files automatically.
 .SECONDARY:
 
+maintainer-clean: distclean
+
 # PostgreSQL version number
 VERSION = @PACKAGE_VERSION@
 MAJORVERSION = @PG_MAJORVERSION@
@@ -319,12 +321,8 @@ X = @EXEEXT@
 
 # Perl
 
-ifneq (@PERL@,)
-    # quoted to protect pathname with spaces
-    PERL		= '@PERL@'
-else
-    PERL		= $(missing) perl
-endif
+# quoted to protect pathname with spaces
+PERL		= '@PERL@'
 perl_archlibexp		= @perl_archlibexp@
 perl_privlibexp		= @perl_privlibexp@
 perl_includespec	= @perl_includespec@
@@ -765,21 +763,13 @@ TAS         = @TAS@
 # Global targets and rules
 
 %.c: %.l
-ifdef FLEX
 	$(FLEX) $(if $(FLEX_NO_BACKUP),-b) $(FLEXFLAGS) -o'$@' $<
 	@$(if $(FLEX_NO_BACKUP),if [ `wc -l <lex.backup` -eq 1 ]; then rm lex.backup; else echo "Scanner requires backup; see lex.backup." 1>&2; exit 1; fi)
 	$(if $(FLEX_FIX_WARNING),$(PERL) $(top_srcdir)/src/tools/fix-old-flex-code.pl '$@')
-else
-	@$(missing) flex $< '$@'
-endif
 
 %.c: %.y
 	$(if $(BISON_CHECK_CMD),$(BISON_CHECK_CMD))
-ifdef BISON
 	$(BISON) $(BISONFLAGS) -o $@ $<
-else
-	@$(missing) bison $< $@
-endif
 
 %.i: %.c
 	$(CPP) $(CPPFLAGS) -o $@ $<
@@ -907,7 +897,7 @@ recurse = $(foreach target,$(if $1,$1,$(standard_targets)),$(foreach subdir,$(if
 # If a makefile's list of SUBDIRS varies depending on configuration, then
 # any subdirectories excluded from SUBDIRS should instead be added to
 # ALWAYS_SUBDIRS, and then it must call recurse_always as well as recurse.
-# This ensures that distprep, distclean, etc will apply to all subdirectories.
+# This ensures that distclean, etc will apply to all subdirectories.
 # In the normal case all arguments will be defaulted.
 # $1: targets to make recursive (defaults to standard_always_targets)
 # $2: list of subdirs (defaults to ALWAYS_SUBDIRS variable)
@@ -962,7 +952,7 @@ include $(Po_files)
 endif
 
 # hook for clean-up
-clean distclean maintainer-clean: clean-deps
+clean distclean: clean-deps
 
 .PHONY: clean-deps
 clean-deps:
@@ -1046,7 +1036,7 @@ lcov_test.info: $(all_gcda_files)
 
 
 # hook for clean-up
-clean distclean maintainer-clean: clean-coverage
+clean distclean: clean-coverage
 
 .PHONY: clean-coverage
 clean-coverage:
diff --git a/src/backend/Makefile b/src/backend/Makefile
index 1c929383c4..023e14c15c 100644
--- a/src/backend/Makefile
+++ b/src/backend/Makefile
@@ -138,63 +138,38 @@ utils/activity/wait_event_types.h: utils/activity/generate-wait_event_types.pl u
 
 # run this unconditionally to avoid needing to know its dependencies here:
 submake-catalog-headers:
-	$(MAKE) -C catalog distprep generated-header-symlinks
+	$(MAKE) -C catalog generated-header-symlinks
 
 # run this unconditionally to avoid needing to know its dependencies here:
 submake-nodes-headers:
-	$(MAKE) -C nodes distprep generated-header-symlinks
+	$(MAKE) -C nodes generated-header-symlinks
 
 # run this unconditionally to avoid needing to know its dependencies here:
 submake-utils-headers:
-	$(MAKE) -C utils distprep generated-header-symlinks
+	$(MAKE) -C utils generated-header-symlinks
 
 .PHONY: submake-catalog-headers submake-nodes-headers submake-utils-headers
 
 # Make symlinks for these headers in the include directory. That way
 # we can cut down on the -I options. Also, a symlink is automatically
 # up to date when we update the base file.
-#
-# The point of the prereqdir incantation in some of the rules below is to
-# force the symlink to use an absolute path rather than a relative path.
-# For headers which are generated by make distprep, the actual header within
-# src/backend will be in the source tree, while the symlink in src/include
-# will be in the build tree, so a simple ../.. reference won't work.
-# For headers generated during regular builds, we prefer a relative symlink.
 
 .PHONY: generated-headers
 
 generated-headers: $(top_builddir)/src/include/storage/lwlocknames.h $(top_builddir)/src/include/utils/wait_event_types.h submake-catalog-headers submake-nodes-headers submake-utils-headers
 
 $(top_builddir)/src/include/storage/lwlocknames.h: storage/lmgr/lwlocknames.h
-	prereqdir=`cd '$(dir $<)' >/dev/null && pwd` && \
-	  cd '$(dir $@)' && rm -f $(notdir $@) && \
-	  $(LN_S) "$$prereqdir/$(notdir $<)" .
+	rm -f '$@'
+	$(LN_S) ../../backend/$< '$@'
 
 $(top_builddir)/src/include/utils/wait_event_types.h: utils/activity/wait_event_types.h
-	prereqdir=`cd '$(dir $<)' >/dev/null && pwd` && \
-	  cd '$(dir $@)' && rm -f $(notdir $@) && \
-	  $(LN_S) "$$prereqdir/$(notdir $<)" .
+	rm -f '$@'
+	$(LN_S) ../../backend/$< '$@'
 
 utils/probes.o: utils/probes.d $(SUBDIROBJS)
 	$(DTRACE) $(DTRACEFLAGS) -C -G -s $(call expand_subsys,$^) -o $@
 
 
-##########################################################################
-
-# Be sure that these files get removed by the maintainer-clean target
-distprep:
-	$(MAKE) -C parser	gram.c gram.h scan.c
-	$(MAKE) -C bootstrap	bootparse.c bootparse.h bootscanner.c
-	$(MAKE) -C catalog	distprep
-	$(MAKE) -C nodes	distprep
-	$(MAKE) -C replication	repl_gram.c repl_gram.h repl_scanner.c syncrep_gram.c syncrep_gram.h syncrep_scanner.c
-	$(MAKE) -C storage/lmgr	lwlocknames.h lwlocknames.c
-	$(MAKE) -C utils	distprep
-	$(MAKE) -C utils/activity	wait_event_types.h pgstat_wait_event.c
-	$(MAKE) -C utils/adt	jsonpath_gram.c jsonpath_gram.h jsonpath_scan.c
-	$(MAKE) -C utils/misc	guc-file.c
-
-
 ##########################################################################
 
 install: all installdirs install-bin
@@ -290,33 +265,9 @@ ifeq ($(PORTNAME), win32)
 endif
 
 distclean: clean
+# generated by configure
 	rm -f port/tas.s port/pg_sema.c port/pg_shmem.c
 
-maintainer-clean: distclean
-	$(MAKE) -C catalog $@
-	$(MAKE) -C nodes $@
-	$(MAKE) -C utils $@
-	rm -f bootstrap/bootparse.c \
-	      bootstrap/bootparse.h \
-	      bootstrap/bootscanner.c \
-	      parser/gram.c \
-	      parser/gram.h \
-	      parser/scan.c \
-	      replication/repl_gram.c \
-	      replication/repl_gram.h \
-	      replication/repl_scanner.c \
-	      replication/syncrep_gram.c \
-	      replication/syncrep_gram.h \
-	      replication/syncrep_scanner.c \
-	      storage/lmgr/lwlocknames.c \
-	      storage/lmgr/lwlocknames.h \
-	      utils/activity/pgstat_wait_event.c \
-	      utils/activity/wait_event_types.h \
-	      utils/adt/jsonpath_gram.c \
-	      utils/adt/jsonpath_gram.h \
-	      utils/adt/jsonpath_scan.c \
-	      utils/misc/guc-file.c
-
 
 ##########################################################################
 #
diff --git a/src/backend/bootstrap/Makefile b/src/backend/bootstrap/Makefile
index 606c8021e7..509b51e648 100644
--- a/src/backend/bootstrap/Makefile
+++ b/src/backend/bootstrap/Makefile
@@ -28,5 +28,7 @@ bootparse.c: BISONFLAGS += -d
 # Force these dependencies to be known even without dependency info built:
 bootparse.o bootscanner.o: bootparse.h
 
-# bootparse.c and bootscanner.c are in the distribution tarball, so
-# they are not cleaned here.
+clean:
+	rm -f bootparse.c \
+	      bootparse.h \
+	      bootscanner.c
diff --git a/src/backend/catalog/Makefile b/src/backend/catalog/Makefile
index a60107bf94..b49666dae2 100644
--- a/src/backend/catalog/Makefile
+++ b/src/backend/catalog/Makefile
@@ -89,9 +89,7 @@ POSTGRES_BKI_DATA = $(addprefix $(top_srcdir)/src/include/catalog/,\
 	pg_ts_template.dat pg_type.dat \
 	)
 
-all: distprep generated-header-symlinks
-
-distprep: bki-stamp
+all: generated-header-symlinks
 
 .PHONY: generated-header-symlinks
 
@@ -110,14 +108,12 @@ bki-stamp: genbki.pl Catalog.pm $(POSTGRES_BKI_SRCS) $(POSTGRES_BKI_DATA) $(top_
 		--set-version=$(MAJORVERSION) $(POSTGRES_BKI_SRCS)
 	touch $@
 
-# The generated headers must all be symlinked into builddir/src/include/,
-# using absolute links for the reasons explained in src/backend/Makefile.
+# The generated headers must all be symlinked into src/include/.
 # We use header-stamp to record that we've done this because the symlinks
 # themselves may appear older than bki-stamp.
 $(top_builddir)/src/include/catalog/header-stamp: bki-stamp
-	prereqdir=`cd '$(dir $<)' >/dev/null && pwd` && \
 	cd '$(dir $@)' && for file in $(GENERATED_HEADERS); do \
-	  rm -f $$file && $(LN_S) "$$prereqdir/$$file" . ; \
+	  rm -f $$file && $(LN_S) "../../../$(subdir)/$$file" . ; \
 	done
 	touch $@
 
@@ -138,9 +134,5 @@ installdirs:
 uninstall-data:
 	rm -f $(addprefix '$(DESTDIR)$(datadir)'/, postgres.bki system_constraints.sql system_functions.sql system_views.sql information_schema.sql sql_features.txt)
 
-# postgres.bki, system_constraints.sql, and the generated headers are
-# in the distribution tarball, so they are not cleaned here.
 clean:
-
-maintainer-clean: clean
 	rm -f bki-stamp postgres.bki system_constraints.sql $(GENERATED_HEADERS)
diff --git a/src/backend/jit/llvm/Makefile b/src/backend/jit/llvm/Makefile
index 2da122a391..0036c4f552 100644
--- a/src/backend/jit/llvm/Makefile
+++ b/src/backend/jit/llvm/Makefile
@@ -71,6 +71,6 @@ uninstall-types:
 
 include $(top_srcdir)/src/Makefile.shlib
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 	rm -f $(OBJS)
 	rm -f llvmjit_types.bc
diff --git a/src/backend/nls.mk b/src/backend/nls.mk
index 8263527c85..f1464cc5c5 100644
--- a/src/backend/nls.mk
+++ b/src/backend/nls.mk
@@ -22,7 +22,7 @@ GETTEXT_FLAGS    = $(BACKEND_COMMON_GETTEXT_FLAGS) \
     report_invalid_record:2:c-format \
     ereport_startup_progress:1:c-format
 
-gettext-files: distprep
+gettext-files: postgres
 	find $(srcdir) $(srcdir)/../common $(srcdir)/../port -name '*.c' -print | LC_ALL=C sort >$@
 
 my-clean:
diff --git a/src/backend/nodes/Makefile b/src/backend/nodes/Makefile
index 0a95e683d0..ebbe9052cb 100644
--- a/src/backend/nodes/Makefile
+++ b/src/backend/nodes/Makefile
@@ -65,9 +65,7 @@ node_headers = \
 
 # see also catalog/Makefile for an explanation of these make rules
 
-all: distprep generated-header-symlinks
-
-distprep: node-support-stamp
+all: generated-header-symlinks
 
 .PHONY: generated-header-symlinks
 
@@ -81,14 +79,12 @@ node-support-stamp: gen_node_support.pl $(addprefix $(top_srcdir)/src/include/,$
 	$(PERL) $^
 	touch $@
 
-# These generated headers must be symlinked into builddir/src/include/,
-# using absolute links for the reasons explained in src/backend/Makefile.
+# These generated headers must be symlinked into src/include/.
 # We use header-stamp to record that we've done this because the symlinks
 # themselves may appear older than node-support-stamp.
 $(top_builddir)/src/include/nodes/header-stamp: node-support-stamp
-	prereqdir=`cd '$(dir $<)' >/dev/null && pwd` && \
 	cd '$(dir $@)' && for file in nodetags.h; do \
-	  rm -f $$file && $(LN_S) "$$prereqdir/$$file" . ; \
+	  rm -f $$file && $(LN_S) "../../../$(subdir)/$$file" . ; \
 	done
 	touch $@
 
@@ -98,5 +94,5 @@ outfuncs.o: outfuncs.c outfuncs.funcs.c outfuncs.switch.c | node-support-stamp
 queryjumblefuncs.o: queryjumblefuncs.c queryjumblefuncs.funcs.c queryjumblefuncs.switch.c | node-support-stamp
 readfuncs.o:  readfuncs.c readfuncs.funcs.c readfuncs.switch.c | node-support-stamp
 
-maintainer-clean: clean
+clean:
 	rm -f node-support-stamp $(addsuffix funcs.funcs.c,copy equal out queryjumble read) $(addsuffix funcs.switch.c,copy equal out queryjumble read) nodetags.h
diff --git a/src/backend/parser/Makefile b/src/backend/parser/Makefile
index 9f1c4022bb..401c16686c 100644
--- a/src/backend/parser/Makefile
+++ b/src/backend/parser/Makefile
@@ -64,8 +64,8 @@ scan.c: FLEX_FIX_WARNING=yes
 # Force these dependencies to be known even without dependency info built:
 gram.o scan.o parser.o: gram.h
 
-
-# gram.c, gram.h, and scan.c are in the distribution tarball, so they
-# are not cleaned here.
-clean distclean maintainer-clean:
+clean:
+	rm -f gram.c \
+	      gram.h \
+	      scan.c
 	rm -f lex.backup
diff --git a/src/backend/port/Makefile b/src/backend/port/Makefile
index 2d00b4f05a..47338d9922 100644
--- a/src/backend/port/Makefile
+++ b/src/backend/port/Makefile
@@ -43,6 +43,6 @@ else
 	$(CC) $(CFLAGS) -c $<
 endif
 
-distclean clean:
+clean:
 	rm -f tas_cpp.s
 	$(MAKE) -C win32 clean
diff --git a/src/backend/replication/Makefile b/src/backend/replication/Makefile
index 23f29ba545..7f867ee91d 100644
--- a/src/backend/replication/Makefile
+++ b/src/backend/replication/Makefile
@@ -48,6 +48,10 @@ syncrep_gram.c: BISONFLAGS += -d
 # Force these dependencies to be known even without dependency info built:
 syncrep_gram.o syncrep_scanner.o: syncrep_gram.h
 
-# repl_gram.c, repl_scanner.c, syncrep_gram.c and syncrep_scanner.c
-# are in the distribution tarball, so they are not cleaned here.
-# (Our parent Makefile takes care of them during maintainer-clean.)
+clean:
+	rm -f repl_gram.c \
+	      repl_gram.h \
+	      repl_scanner.c \
+	      syncrep_gram.c \
+	      syncrep_gram.h \
+	      syncrep_scanner.c
diff --git a/src/backend/replication/libpqwalreceiver/Makefile b/src/backend/replication/libpqwalreceiver/Makefile
index f26daa135f..e882907350 100644
--- a/src/backend/replication/libpqwalreceiver/Makefile
+++ b/src/backend/replication/libpqwalreceiver/Makefile
@@ -33,5 +33,5 @@ installdirs: installdirs-lib
 
 uninstall: uninstall-lib
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 	rm -f $(OBJS)
diff --git a/src/backend/replication/pgoutput/Makefile b/src/backend/replication/pgoutput/Makefile
index 3b41fbcfac..d89d317fe7 100644
--- a/src/backend/replication/pgoutput/Makefile
+++ b/src/backend/replication/pgoutput/Makefile
@@ -28,5 +28,5 @@ installdirs: installdirs-lib
 
 uninstall: uninstall-lib
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 	rm -f $(OBJS)
diff --git a/src/backend/snowball/Makefile b/src/backend/snowball/Makefile
index 4bebfa0250..efc4300eb9 100644
--- a/src/backend/snowball/Makefile
+++ b/src/backend/snowball/Makefile
@@ -104,8 +104,6 @@ include $(top_srcdir)/src/Makefile.shlib
 $(SQLSCRIPT): snowball_create.pl snowball_func.sql.in snowball.sql.in
 	$(PERL) $< --input ${srcdir} --outdir .
 
-distprep: $(SQLSCRIPT)
-
 install: all installdirs install-lib install-script
 	$(INSTALL_DATA) $(addprefix $(srcdir)/stopwords/,$(stop_files)) '$(DESTDIR)$(datadir)/$(DICTDIR)'
 
@@ -122,6 +120,4 @@ uninstall: uninstall-lib
 
 clean distclean: clean-lib
 	rm -f $(OBJS)
-
-maintainer-clean: distclean
 	rm -f $(SQLSCRIPT)
diff --git a/src/backend/storage/lmgr/Makefile b/src/backend/storage/lmgr/Makefile
index b25b7ee421..c48ba943c4 100644
--- a/src/backend/storage/lmgr/Makefile
+++ b/src/backend/storage/lmgr/Makefile
@@ -45,8 +45,6 @@ lwlocknames.h: $(top_srcdir)/src/backend/storage/lmgr/lwlocknames.txt generate-l
 check: s_lock_test
 	./s_lock_test
 
-clean distclean:
+clean:
 	rm -f s_lock_test
-
-maintainer-clean: clean
 	rm -f lwlocknames.h lwlocknames.c
diff --git a/src/backend/utils/Makefile b/src/backend/utils/Makefile
index deb901609f..e184e3dfdf 100644
--- a/src/backend/utils/Makefile
+++ b/src/backend/utils/Makefile
@@ -34,13 +34,14 @@ catalogdir  = $(top_srcdir)/src/backend/catalog
 
 include $(top_srcdir)/src/backend/common.mk
 
-all: distprep probes.h generated-header-symlinks
+all: probes.h generated-header-symlinks
 
-distprep: fmgr-stamp errcodes.h
+.PHONY: generated-header-symlinks submake-adt-headers
 
-.PHONY: generated-header-symlinks
+generated-header-symlinks: $(top_builddir)/src/include/utils/header-stamp submake-adt-headers
 
-generated-header-symlinks: $(top_builddir)/src/include/utils/header-stamp $(top_builddir)/src/include/utils/probes.h
+submake-adt-headers:
+	$(MAKE) -C adt jsonpath_gram.h
 
 $(SUBDIRS:%=%-recursive): fmgr-stamp errcodes.h
 
@@ -66,22 +67,15 @@ probes.h: Gen_dummy_probes.sed probes.d
 	sed -f $^ >$@
 endif
 
-# These generated headers must be symlinked into builddir/src/include/,
-# using absolute links for the reasons explained in src/backend/Makefile.
+# These generated headers must be symlinked into src/include/.
 # We use header-stamp to record that we've done this because the symlinks
 # themselves may appear older than fmgr-stamp.
-$(top_builddir)/src/include/utils/header-stamp: fmgr-stamp errcodes.h
-	prereqdir=`cd '$(dir $<)' >/dev/null && pwd` && \
-	cd '$(dir $@)' && for file in fmgroids.h fmgrprotos.h errcodes.h; do \
-	  rm -f $$file && $(LN_S) "$$prereqdir/$$file" . ; \
+$(top_builddir)/src/include/utils/header-stamp: fmgr-stamp errcodes.h probes.h
+	cd '$(dir $@)' && for file in fmgroids.h fmgrprotos.h errcodes.h probes.h; do \
+	  rm -f $$file && $(LN_S) "../../../$(subdir)/$$file" . ; \
 	done
 	touch $@
 
-# probes.h is handled differently because it's not in the distribution tarball.
-$(top_builddir)/src/include/utils/probes.h: probes.h
-	cd '$(dir $@)' && rm -f $(notdir $@) && \
-	    $(LN_S) "../../../$(subdir)/probes.h" .
-
 # Recipe for rebuilding the Perl version of Gen_dummy_probes
 # Nothing depends on it, so it will never be called unless explicitly requested
 # The last two lines of the recipe format the script according to  our
@@ -104,10 +98,6 @@ installdirs:
 uninstall-data:
 	rm -f $(addprefix '$(DESTDIR)$(datadir)'/, errcodes.txt)
 
-# fmgroids.h, fmgrprotos.h, fmgrtab.c, fmgr-stamp, and errcodes.h are in the
-# distribution tarball, so they are not cleaned here.
 clean:
 	rm -f probes.h probes.h.tmp
-
-maintainer-clean: clean
 	rm -f fmgroids.h fmgrprotos.h fmgrtab.c fmgr-stamp errcodes.h
diff --git a/src/backend/utils/activity/Makefile b/src/backend/utils/activity/Makefile
index f1117745d4..ac76cf782d 100644
--- a/src/backend/utils/activity/Makefile
+++ b/src/backend/utils/activity/Makefile
@@ -43,5 +43,5 @@ pgstat_wait_event.c: wait_event_types.h
 wait_event_types.h: $(top_srcdir)/src/backend/utils/activity/wait_event_names.txt generate-wait_event_types.pl
 	$(PERL) $(srcdir)/generate-wait_event_types.pl --code $<
 
-maintainer-clean: clean
+clean:
 	rm -f wait_event_types.h pgstat_wait_event.c
diff --git a/src/backend/utils/adt/Makefile b/src/backend/utils/adt/Makefile
index 0de0bbb1b8..199eae525d 100644
--- a/src/backend/utils/adt/Makefile
+++ b/src/backend/utils/adt/Makefile
@@ -132,10 +132,9 @@ jsonpath_scan.c: FLEX_NO_BACKUP=yes
 # Force these dependencies to be known even without dependency info built:
 jsonpath_gram.o jsonpath_scan.o: jsonpath_gram.h
 
-# jsonpath_gram.c and jsonpath_scan.c are in the distribution tarball,
-# so they are not cleaned here.
-clean distclean maintainer-clean:
+clean:
 	rm -f lex.backup
+	rm -f jsonpath_gram.c jsonpath_gram.h jsonpath_scan.c
 
 like.o: like.c like_match.c
 
diff --git a/src/backend/utils/mb/Makefile b/src/backend/utils/mb/Makefile
index b19a125fa2..bbde71b5aa 100644
--- a/src/backend/utils/mb/Makefile
+++ b/src/backend/utils/mb/Makefile
@@ -21,5 +21,5 @@ OBJS = \
 
 include $(top_srcdir)/src/backend/common.mk
 
-clean distclean maintainer-clean:
+clean distclean:
 	$(MAKE) -C conversion_procs $@
diff --git a/src/backend/utils/mb/Unicode/Makefile b/src/backend/utils/mb/Unicode/Makefile
index 728ccb99c2..6c0a8150f2 100644
--- a/src/backend/utils/mb/Unicode/Makefile
+++ b/src/backend/utils/mb/Unicode/Makefile
@@ -66,8 +66,6 @@ all: $(MAPS)
 
 distclean: clean
 	rm -f $(TEXTS)
-
-maintainer-clean: distclean
 	rm -f $(MAPS)
 
 
diff --git a/src/backend/utils/mb/conversion_procs/proc.mk b/src/backend/utils/mb/conversion_procs/proc.mk
index e0a3b74b25..2eeae28240 100644
--- a/src/backend/utils/mb/conversion_procs/proc.mk
+++ b/src/backend/utils/mb/conversion_procs/proc.mk
@@ -13,5 +13,5 @@ installdirs: installdirs-lib
 
 uninstall: uninstall-lib
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 	rm -f $(OBJS)
diff --git a/src/backend/utils/misc/Makefile b/src/backend/utils/misc/Makefile
index 2910032930..c2971c7678 100644
--- a/src/backend/utils/misc/Makefile
+++ b/src/backend/utils/misc/Makefile
@@ -40,6 +40,5 @@ endif
 
 include $(top_srcdir)/src/backend/common.mk
 
-# Note: guc-file.c is not deleted by 'make clean',
-# since we want to ship it in distribution tarballs.
 clean:
+	rm -f guc-file.c
diff --git a/src/bin/initdb/Makefile b/src/bin/initdb/Makefile
index d69bd89572..7043289239 100644
--- a/src/bin/initdb/Makefile
+++ b/src/bin/initdb/Makefile
@@ -55,7 +55,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/initdb$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f initdb$(X) $(OBJS) localtime.c
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_amcheck/Makefile b/src/bin/pg_amcheck/Makefile
index 947f2267ed..528c588e35 100644
--- a/src/bin/pg_amcheck/Makefile
+++ b/src/bin/pg_amcheck/Makefile
@@ -40,7 +40,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_amcheck$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_amcheck$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_archivecleanup/Makefile b/src/bin/pg_archivecleanup/Makefile
index 49935d6dce..93fd703f22 100644
--- a/src/bin/pg_archivecleanup/Makefile
+++ b/src/bin/pg_archivecleanup/Makefile
@@ -25,7 +25,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_archivecleanup$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_archivecleanup$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_basebackup/Makefile b/src/bin/pg_basebackup/Makefile
index 893a75c942..74dc1ddd6d 100644
--- a/src/bin/pg_basebackup/Makefile
+++ b/src/bin/pg_basebackup/Makefile
@@ -71,7 +71,7 @@ uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_receivewal$(X)'
 	rm -f '$(DESTDIR)$(bindir)/pg_recvlogical$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_basebackup$(X) pg_receivewal$(X) pg_recvlogical$(X) \
 		$(BBOBJS) pg_receivewal.o pg_recvlogical.o \
 		$(OBJS)
diff --git a/src/bin/pg_checksums/Makefile b/src/bin/pg_checksums/Makefile
index 4911f6bee2..ac736b2260 100644
--- a/src/bin/pg_checksums/Makefile
+++ b/src/bin/pg_checksums/Makefile
@@ -36,7 +36,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_checksums$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_checksums$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_config/Makefile b/src/bin/pg_config/Makefile
index 1a405f9c97..cb13aceafa 100644
--- a/src/bin/pg_config/Makefile
+++ b/src/bin/pg_config/Makefile
@@ -33,7 +33,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_config$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_config$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_controldata/Makefile b/src/bin/pg_controldata/Makefile
index aa5bd58222..00ee1e25b3 100644
--- a/src/bin/pg_controldata/Makefile
+++ b/src/bin/pg_controldata/Makefile
@@ -33,7 +33,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_controldata$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_controldata$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_ctl/Makefile b/src/bin/pg_ctl/Makefile
index 4b6d47a8f8..4d29ca72c1 100644
--- a/src/bin/pg_ctl/Makefile
+++ b/src/bin/pg_ctl/Makefile
@@ -42,7 +42,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_ctl$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_ctl$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_dump/Makefile b/src/bin/pg_dump/Makefile
index 24de7593a6..604cddb997 100644
--- a/src/bin/pg_dump/Makefile
+++ b/src/bin/pg_dump/Makefile
@@ -69,6 +69,6 @@ installcheck:
 uninstall:
 	rm -f $(addprefix '$(DESTDIR)$(bindir)'/, pg_dump$(X) pg_restore$(X) pg_dumpall$(X))
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_dump$(X) pg_restore$(X) pg_dumpall$(X) $(OBJS) pg_dump.o common.o pg_dump_sort.o pg_restore.o pg_dumpall.o
 	rm -rf tmp_check
diff --git a/src/bin/pg_resetwal/Makefile b/src/bin/pg_resetwal/Makefile
index a363b948b5..a06e493ba8 100644
--- a/src/bin/pg_resetwal/Makefile
+++ b/src/bin/pg_resetwal/Makefile
@@ -33,7 +33,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_resetwal$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_resetwal$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_rewind/Makefile b/src/bin/pg_rewind/Makefile
index bed05f1609..8df1da80cb 100644
--- a/src/bin/pg_rewind/Makefile
+++ b/src/bin/pg_rewind/Makefile
@@ -49,7 +49,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_rewind$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_rewind$(X) $(OBJS) xlogreader.c
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_test_fsync/Makefile b/src/bin/pg_test_fsync/Makefile
index 631d0f38a8..4c5e518125 100644
--- a/src/bin/pg_test_fsync/Makefile
+++ b/src/bin/pg_test_fsync/Makefile
@@ -31,6 +31,6 @@ installcheck:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_test_fsync$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_test_fsync$(X) $(OBJS)
 	rm -rf tmp_check
diff --git a/src/bin/pg_test_timing/Makefile b/src/bin/pg_test_timing/Makefile
index 84d84c38aa..7f677edadb 100644
--- a/src/bin/pg_test_timing/Makefile
+++ b/src/bin/pg_test_timing/Makefile
@@ -31,6 +31,6 @@ installcheck:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_test_timing$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_test_timing$(X) $(OBJS)
 	rm -rf tmp_check
diff --git a/src/bin/pg_upgrade/Makefile b/src/bin/pg_upgrade/Makefile
index 5834513add..f76aca1b1a 100644
--- a/src/bin/pg_upgrade/Makefile
+++ b/src/bin/pg_upgrade/Makefile
@@ -46,7 +46,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_upgrade$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_upgrade$(X) $(OBJS)
 	rm -rf delete_old_cluster.sh log/ tmp_check/ \
 	       reindex_hash.sql
diff --git a/src/bin/pg_verifybackup/Makefile b/src/bin/pg_verifybackup/Makefile
index 596df15118..c96323faa9 100644
--- a/src/bin/pg_verifybackup/Makefile
+++ b/src/bin/pg_verifybackup/Makefile
@@ -38,7 +38,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_verifybackup$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_verifybackup$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_waldump/Makefile b/src/bin/pg_waldump/Makefile
index 0ecf582039..4c1ee64950 100644
--- a/src/bin/pg_waldump/Makefile
+++ b/src/bin/pg_waldump/Makefile
@@ -45,7 +45,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_waldump$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_waldump$(X) $(OBJS) $(RMGRDESCSOURCES) xlogreader.c xlogstats.c
 	rm -rf tmp_check
 
diff --git a/src/bin/pgbench/Makefile b/src/bin/pgbench/Makefile
index 68b6eb0376..987bf64df9 100644
--- a/src/bin/pgbench/Makefile
+++ b/src/bin/pgbench/Makefile
@@ -38,8 +38,6 @@ exprparse.c: BISONFLAGS += -d
 # Force these dependencies to be known even without dependency info built:
 exprparse.o exprscan.o: exprparse.h
 
-distprep: exprparse.c exprscan.c
-
 install: all installdirs
 	$(INSTALL_PROGRAM) pgbench$(X) '$(DESTDIR)$(bindir)/pgbench$(X)'
 
@@ -52,8 +50,6 @@ uninstall:
 clean distclean:
 	rm -f pgbench$(X) $(OBJS)
 	rm -rf tmp_check
-
-maintainer-clean: distclean
 	rm -f exprparse.h exprparse.c exprscan.c
 
 check:
diff --git a/src/bin/psql/Makefile b/src/bin/psql/Makefile
index 1f2bf0c6b0..8ad7c65446 100644
--- a/src/bin/psql/Makefile
+++ b/src/bin/psql/Makefile
@@ -62,8 +62,6 @@ psqlscanslash.c: FLEXFLAGS = -Cfe -p -p
 psqlscanslash.c: FLEX_NO_BACKUP=yes
 psqlscanslash.c: FLEX_FIX_WARNING=yes
 
-distprep: sql_help.h sql_help.c psqlscanslash.c
-
 install: all installdirs
 	$(INSTALL_PROGRAM) psql$(X) '$(DESTDIR)$(bindir)/psql$(X)'
 	$(INSTALL_DATA) $(srcdir)/psqlrc.sample '$(DESTDIR)$(datadir)/psqlrc.sample'
@@ -77,10 +75,6 @@ uninstall:
 clean distclean:
 	rm -f psql$(X) $(OBJS) lex.backup
 	rm -rf tmp_check
-
-# files removed here are supposed to be in the distribution tarball,
-# so do not clean them in the clean/distclean rules
-maintainer-clean: distclean
 	rm -f sql_help.h sql_help.c psqlscanslash.c
 
 check:
diff --git a/src/bin/scripts/Makefile b/src/bin/scripts/Makefile
index a7a9d0fea5..20db40b103 100644
--- a/src/bin/scripts/Makefile
+++ b/src/bin/scripts/Makefile
@@ -48,7 +48,7 @@ installdirs:
 uninstall:
 	rm -f $(addprefix '$(DESTDIR)$(bindir)'/, $(addsuffix $(X), $(PROGRAMS)))
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f $(addsuffix $(X), $(PROGRAMS)) $(addsuffix .o, $(PROGRAMS))
 	rm -f common.o $(WIN32RES)
 	rm -rf tmp_check
diff --git a/src/common/Makefile b/src/common/Makefile
index 113029bf7b..ec063c6e18 100644
--- a/src/common/Makefile
+++ b/src/common/Makefile
@@ -121,8 +121,6 @@ GEN_KEYWORDLIST_DEPS = $(TOOLSDIR)/gen_keywordlist.pl $(TOOLSDIR)/PerfectHash.pm
 
 all: libpgcommon.a libpgcommon_shlib.a libpgcommon_srv.a
 
-distprep: kwlist_d.h
-
 # libpgcommon is needed by some contrib
 install: all installdirs
 	$(INSTALL_STLIB) libpgcommon.a '$(DESTDIR)$(libdir)/libpgcommon.a'
@@ -188,10 +186,7 @@ RYU_OBJS = $(RYU_FILES) $(RYU_FILES:%.o=%_shlib.o) $(RYU_FILES:%.o=%_srv.o)
 
 $(RYU_OBJS): CFLAGS += $(PERMIT_DECLARATION_AFTER_STATEMENT)
 
-# kwlist_d.h is in the distribution tarball, so it is not cleaned here.
 clean distclean:
 	rm -f libpgcommon.a libpgcommon_shlib.a libpgcommon_srv.a
 	rm -f $(OBJS_FRONTEND) $(OBJS_SHLIB) $(OBJS_SRV)
-
-maintainer-clean: distclean
 	rm -f kwlist_d.h
diff --git a/src/common/unicode/Makefile b/src/common/unicode/Makefile
index 382da476cf..d6e427b582 100644
--- a/src/common/unicode/Makefile
+++ b/src/common/unicode/Makefile
@@ -68,5 +68,3 @@ clean:
 
 distclean: clean
 	rm -f UnicodeData.txt EastAsianWidth.txt CompositionExclusions.txt NormalizationTest.txt norm_test_table.h unicode_norm_table.h
-
-maintainer-clean: distclean
diff --git a/src/fe_utils/Makefile b/src/fe_utils/Makefile
index 456d6dd390..8accd5906d 100644
--- a/src/fe_utils/Makefile
+++ b/src/fe_utils/Makefile
@@ -48,8 +48,6 @@ psqlscan.c: FLEXFLAGS = -Cfe -p -p
 psqlscan.c: FLEX_NO_BACKUP=yes
 psqlscan.c: FLEX_FIX_WARNING=yes
 
-distprep: psqlscan.c
-
 # libpgfeutils could be useful to contrib, so install it
 install: all installdirs
 	$(INSTALL_STLIB) libpgfeutils.a '$(DESTDIR)$(libdir)/libpgfeutils.a'
@@ -62,8 +60,4 @@ uninstall:
 
 clean distclean:
 	rm -f libpgfeutils.a $(OBJS) lex.backup
-
-# psqlscan.c is supposed to be in the distribution tarball,
-# so do not clean it in the clean/distclean rules
-maintainer-clean: distclean
 	rm -f psqlscan.c
diff --git a/src/include/Makefile b/src/include/Makefile
index 5d213187e2..0dfe7d9e23 100644
--- a/src/include/Makefile
+++ b/src/include/Makefile
@@ -77,5 +77,5 @@ clean:
 	rm -f catalog/pg_*_d.h catalog/header-stamp
 	rm -f nodes/nodetags.h nodes/header-stamp
 
-distclean maintainer-clean: clean
+distclean: clean
 	rm -f pg_config.h pg_config_ext.h pg_config_os.h stamp-h stamp-ext-h
diff --git a/src/interfaces/ecpg/Makefile b/src/interfaces/ecpg/Makefile
index e4bbf7b8a8..3002bc3c1b 100644
--- a/src/interfaces/ecpg/Makefile
+++ b/src/interfaces/ecpg/Makefile
@@ -23,7 +23,7 @@ install-pgtypeslib-recurse install-ecpglib-recurse install-compatlib-recurse ins
 install-compatlib-recurse: install-ecpglib-recurse
 install-ecpglib-recurse: install-pgtypeslib-recurse
 
-clean distclean maintainer-clean:
+clean distclean:
 	$(MAKE) -C test clean
 
 checktcp: | temp-install
diff --git a/src/interfaces/ecpg/compatlib/Makefile b/src/interfaces/ecpg/compatlib/Makefile
index b9483fba08..695fd1a080 100644
--- a/src/interfaces/ecpg/compatlib/Makefile
+++ b/src/interfaces/ecpg/compatlib/Makefile
@@ -55,5 +55,3 @@ uninstall: uninstall-lib
 
 clean distclean: clean-lib
 	rm -f $(OBJS)
-
-maintainer-clean: distclean
diff --git a/src/interfaces/ecpg/ecpglib/Makefile b/src/interfaces/ecpg/ecpglib/Makefile
index 652e023405..103cce393a 100644
--- a/src/interfaces/ecpg/ecpglib/Makefile
+++ b/src/interfaces/ecpg/ecpglib/Makefile
@@ -66,5 +66,3 @@ uninstall: uninstall-lib
 
 clean distclean: clean-lib
 	rm -f $(OBJS)
-
-maintainer-clean: distclean
diff --git a/src/interfaces/ecpg/include/Makefile b/src/interfaces/ecpg/include/Makefile
index 9c68bf3c47..3476409cef 100644
--- a/src/interfaces/ecpg/include/Makefile
+++ b/src/interfaces/ecpg/include/Makefile
@@ -31,5 +31,5 @@ uninstall:
 	rm -f $(addprefix '$(DESTDIR)$(informix_esql_dir)'/, $(informix_headers))
 	rm -f '$(DESTDIR)$(includedir)'/$(notdir $(ecpg_config_h))
 
-distclean maintainer-clean:
+distclean:
 	rm -f ecpg_config.h stamp-h
diff --git a/src/interfaces/ecpg/pgtypeslib/Makefile b/src/interfaces/ecpg/pgtypeslib/Makefile
index b0e154eb15..e56700a12e 100644
--- a/src/interfaces/ecpg/pgtypeslib/Makefile
+++ b/src/interfaces/ecpg/pgtypeslib/Makefile
@@ -50,5 +50,3 @@ uninstall: uninstall-lib
 
 clean distclean: clean-lib
 	rm -f $(OBJS)
-
-maintainer-clean: distclean
diff --git a/src/interfaces/ecpg/preproc/Makefile b/src/interfaces/ecpg/preproc/Makefile
index 77ae9ab722..afd46cd17c 100644
--- a/src/interfaces/ecpg/preproc/Makefile
+++ b/src/interfaces/ecpg/preproc/Makefile
@@ -81,8 +81,6 @@ ecpg_keywords.o: ecpg_kwlist_d.h
 c_keywords.o: c_kwlist_d.h
 keywords.o: $(top_srcdir)/src/include/parser/kwlist.h
 
-distprep: preproc.y preproc.c preproc.h pgc.c c_kwlist_d.h ecpg_kwlist_d.h
-
 install: all installdirs
 	$(INSTALL_PROGRAM) ecpg$(X) '$(DESTDIR)$(bindir)'
 
@@ -92,11 +90,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/ecpg$(X)'
 
-# preproc.y, preproc.c, preproc.h, pgc.c, c_kwlist_d.h, and ecpg_kwlist_d.h
-# are in the distribution tarball, so they are not cleaned here.
 clean distclean:
 	rm -f *.o ecpg$(X)
 	rm -f typename.c
-
-maintainer-clean: distclean
 	rm -f preproc.y preproc.c preproc.h pgc.c c_kwlist_d.h ecpg_kwlist_d.h
diff --git a/src/interfaces/ecpg/test/Makefile b/src/interfaces/ecpg/test/Makefile
index cf841a3a5b..3769488f16 100644
--- a/src/interfaces/ecpg/test/Makefile
+++ b/src/interfaces/ecpg/test/Makefile
@@ -20,7 +20,7 @@ else
 abs_builddir := $(shell sh -c "pwd -W")
 endif
 
-all install installdirs uninstall distprep:
+all install installdirs uninstall:
 	$(MAKE) -C connect $@
 	$(MAKE) -C sql $@
 	$(MAKE) -C pgtypeslib $@
@@ -29,7 +29,7 @@ all install installdirs uninstall distprep:
 	$(MAKE) -C compat_oracle $@
 	$(MAKE) -C thread $@
 
-clean distclean maintainer-clean:
+clean distclean:
 	$(MAKE) -C connect $@
 	$(MAKE) -C sql $@
 	$(MAKE) -C pgtypeslib $@
diff --git a/src/interfaces/libpq/Makefile b/src/interfaces/libpq/Makefile
index 46653682b0..d0a66cfaa0 100644
--- a/src/interfaces/libpq/Makefile
+++ b/src/interfaces/libpq/Makefile
@@ -165,6 +165,3 @@ clean distclean: clean-lib
 	rm -f $(OBJS) pthread.h libpq-refs-stamp
 # Might be left over from a Win32 client-only build
 	rm -f pg_config_paths.h
-
-maintainer-clean: distclean
-	$(MAKE) -C test $@
diff --git a/src/interfaces/libpq/test/Makefile b/src/interfaces/libpq/test/Makefile
index 75ac08f943..4e17ec1514 100644
--- a/src/interfaces/libpq/test/Makefile
+++ b/src/interfaces/libpq/test/Makefile
@@ -20,5 +20,5 @@ all: $(PROGS)
 
 $(PROGS): $(WIN32RES)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f $(PROGS) *.o
diff --git a/src/makefiles/pgxs.mk b/src/makefiles/pgxs.mk
index 7ba8d5bc98..0de3737e78 100644
--- a/src/makefiles/pgxs.mk
+++ b/src/makefiles/pgxs.mk
@@ -391,7 +391,7 @@ ifdef MODULE_big
 clean: clean-lib
 endif
 
-distclean maintainer-clean: clean
+distclean: clean
 
 
 ifdef REGRESS
diff --git a/src/nls-global.mk b/src/nls-global.mk
index f21bd5ed55..dfff472cb3 100644
--- a/src/nls-global.mk
+++ b/src/nls-global.mk
@@ -171,7 +171,7 @@ all: all-po
 install: install-po
 installdirs: installdirs-po
 uninstall: uninstall-po
-clean distclean maintainer-clean: clean-po
+clean distclean: clean-po
 
 .PHONY: all-po install-po installdirs-po uninstall-po clean-po \
         init-po update-po
diff --git a/src/pl/plperl/GNUmakefile b/src/pl/plperl/GNUmakefile
index 51f8890d15..975f540b3e 100644
--- a/src/pl/plperl/GNUmakefile
+++ b/src/pl/plperl/GNUmakefile
@@ -127,7 +127,7 @@ installcheck: submake
 submake:
 	$(MAKE) -C $(top_builddir)/src/test/regress pg_regress$(X)
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 	rm -f SPI.c Util.c $(OBJS) perlchunks.h plperl_opmask.h
 	rm -rf $(pg_regress_clean_files)
 ifeq ($(PORTNAME), win32)
diff --git a/src/pl/plpgsql/src/Makefile b/src/pl/plpgsql/src/Makefile
index f7eb42d54f..dfb815212f 100644
--- a/src/pl/plpgsql/src/Makefile
+++ b/src/pl/plpgsql/src/Makefile
@@ -104,14 +104,7 @@ submake:
 	$(MAKE) -C $(top_builddir)/src/test/regress pg_regress$(X)
 
 
-distprep: pl_gram.h pl_gram.c plerrcodes.h pl_reserved_kwlist_d.h pl_unreserved_kwlist_d.h
-
-# pl_gram.c, pl_gram.h, plerrcodes.h, pl_reserved_kwlist_d.h, and
-# pl_unreserved_kwlist_d.h are in the distribution tarball, so they
-# are not cleaned here.
 clean distclean: clean-lib
 	rm -f $(OBJS)
 	rm -rf $(pg_regress_clean_files)
-
-maintainer-clean: distclean
 	rm -f pl_gram.c pl_gram.h plerrcodes.h pl_reserved_kwlist_d.h pl_unreserved_kwlist_d.h
diff --git a/src/pl/plpython/Makefile b/src/pl/plpython/Makefile
index 6b1865c240..ef0a5905ae 100644
--- a/src/pl/plpython/Makefile
+++ b/src/pl/plpython/Makefile
@@ -142,6 +142,7 @@ clean distclean: clean-lib
 ifeq ($(PORTNAME), win32)
 	rm -f python${pytverstr}.def
 endif
+	rm -f spiexceptions.h
 
 
 # Force this dependency to be known even without dependency info built:
@@ -149,8 +150,3 @@ plpy_plpymodule.o: spiexceptions.h
 
 spiexceptions.h: $(top_srcdir)/src/backend/utils/errcodes.txt generate-spiexceptions.pl
 	$(PERL) $(srcdir)/generate-spiexceptions.pl $< > $@
-
-distprep: spiexceptions.h
-
-maintainer-clean: distclean
-	rm -f spiexceptions.h
diff --git a/src/pl/tcl/Makefile b/src/pl/tcl/Makefile
index 314f9b2eec..ea52a2efc2 100644
--- a/src/pl/tcl/Makefile
+++ b/src/pl/tcl/Makefile
@@ -63,8 +63,6 @@ pltcl.o: pltclerrcodes.h
 pltclerrcodes.h: $(top_srcdir)/src/backend/utils/errcodes.txt generate-pltclerrcodes.pl
 	$(PERL) $(srcdir)/generate-pltclerrcodes.pl $< > $@
 
-distprep: pltclerrcodes.h
-
 install: all install-lib install-data
 
 installdirs: installdirs-lib
@@ -91,13 +89,10 @@ installcheck: submake
 submake:
 	$(MAKE) -C $(top_builddir)/src/test/regress pg_regress$(X)
 
-# pltclerrcodes.h is in the distribution tarball, so don't clean it here.
 clean distclean: clean-lib
 	rm -f $(OBJS)
 	rm -rf $(pg_regress_clean_files)
 ifeq ($(PORTNAME), win32)
 	rm -f $(tclwithver).def
 endif
-
-maintainer-clean: distclean
 	rm -f pltclerrcodes.h
diff --git a/src/port/Makefile b/src/port/Makefile
index f205c2c9c5..4320dee0d1 100644
--- a/src/port/Makefile
+++ b/src/port/Makefile
@@ -154,6 +154,6 @@ pg_config_paths.h: $(top_builddir)/src/Makefile.global
 	echo "#define HTMLDIR \"$(htmldir)\"" >>$@
 	echo "#define MANDIR \"$(mandir)\"" >>$@
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f libpgport.a libpgport_shlib.a libpgport_srv.a
 	rm -f $(OBJS) $(OBJS_SHLIB) $(OBJS_SRV) pg_config_paths.h
diff --git a/src/test/authentication/Makefile b/src/test/authentication/Makefile
index 46fa72052d..a48ce39aaf 100644
--- a/src/test/authentication/Makefile
+++ b/src/test/authentication/Makefile
@@ -19,5 +19,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/test/examples/Makefile b/src/test/examples/Makefile
index a67f456904..e72d058e0c 100644
--- a/src/test/examples/Makefile
+++ b/src/test/examples/Makefile
@@ -18,5 +18,5 @@ PROGS = testlibpq testlibpq2 testlibpq3 testlibpq4 testlo testlo64
 
 all: $(PROGS)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f $(PROGS) *.o
diff --git a/src/test/icu/Makefile b/src/test/icu/Makefile
index 033b0d03cc..c4fc8cdb8c 100644
--- a/src/test/icu/Makefile
+++ b/src/test/icu/Makefile
@@ -21,5 +21,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/test/isolation/Makefile b/src/test/isolation/Makefile
index b8738b7c1b..8f5192fb37 100644
--- a/src/test/isolation/Makefile
+++ b/src/test/isolation/Makefile
@@ -43,8 +43,6 @@ pg_isolation_regress$(X): isolation_main.o pg_regress.o $(WIN32RES)
 isolationtester$(X): $(OBJS) | submake-libpq submake-libpgport
 	$(CC) $(CFLAGS) $^ $(libpq_pgport) $(LDFLAGS) $(LDFLAGS_EX) $(LIBS) -o $@
 
-distprep: specparse.c specscanner.c
-
 # See notes in src/backend/parser/Makefile about the following two rules
 specparse.h: specparse.c
 	touch $@
@@ -60,8 +58,6 @@ clean distclean:
 	rm -f isolationtester$(X) pg_isolation_regress$(X) $(OBJS) isolation_main.o
 	rm -f pg_regress.o
 	rm -rf $(pg_regress_clean_files)
-
-maintainer-clean: distclean
 	rm -f specparse.h specparse.c specscanner.c
 
 installcheck: all
diff --git a/src/test/kerberos/Makefile b/src/test/kerberos/Makefile
index f460d2c0e7..44da65611e 100644
--- a/src/test/kerberos/Makefile
+++ b/src/test/kerberos/Makefile
@@ -24,5 +24,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/test/ldap/Makefile b/src/test/ldap/Makefile
index 73bc878ea8..d4305ed5eb 100644
--- a/src/test/ldap/Makefile
+++ b/src/test/ldap/Makefile
@@ -21,5 +21,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/test/locale/Makefile b/src/test/locale/Makefile
index 7ba096b542..a40c67af07 100644
--- a/src/test/locale/Makefile
+++ b/src/test/locale/Makefile
@@ -10,7 +10,7 @@ DIRS = de_DE.ISO8859-1 gr_GR.ISO8859-7 koi8-r koi8-to-win1251
 
 all: $(PROGS)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f $(PROGS) *.o
 	rm -rf tmp_check
 	for d in $(DIRS); do \
diff --git a/src/test/recovery/Makefile b/src/test/recovery/Makefile
index c60314d195..49f1d1c118 100644
--- a/src/test/recovery/Makefile
+++ b/src/test/recovery/Makefile
@@ -25,5 +25,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/test/regress/GNUmakefile b/src/test/regress/GNUmakefile
index 38c3a1f85b..388f2700bd 100644
--- a/src/test/regress/GNUmakefile
+++ b/src/test/regress/GNUmakefile
@@ -146,7 +146,7 @@ bigcheck: all | temp-install
 ## Clean up
 ##
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 # things built by `all' target
 	rm -f $(OBJS) refint$(DLSUFFIX) autoinc$(DLSUFFIX)
 	rm -f pg_regress_main.o pg_regress.o pg_regress$(X)
diff --git a/src/test/ssl/Makefile b/src/test/ssl/Makefile
index af1e06e949..2d7c69068f 100644
--- a/src/test/ssl/Makefile
+++ b/src/test/ssl/Makefile
@@ -23,7 +23,7 @@ export OPENSSL with_ssl
 sslfiles sslfiles-clean:
 	$(MAKE) -f $(srcdir)/sslfiles.mk $@
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
 	$(MAKE) -f $(srcdir)/sslfiles.mk $@
 
diff --git a/src/test/ssl/sslfiles.mk b/src/test/ssl/sslfiles.mk
index f7ababe42c..62b2272183 100644
--- a/src/test/ssl/sslfiles.mk
+++ b/src/test/ssl/sslfiles.mk
@@ -269,6 +269,6 @@ sslfiles-clean:
 # clean targets will be run during a "standard" recursive clean run from the
 # main build tree. The sslfiles-clean target must be run explicitly from this
 # directory.
-.PHONY: clean distclean maintainer-clean
-clean distclean maintainer-clean:
+.PHONY: clean distclean
+clean distclean:
 	rm -rf ssl/*.old ssl/new_certs_dir ssl/client*_tmp.key
diff --git a/src/test/subscription/Makefile b/src/test/subscription/Makefile
index 99d1fe012d..36475ffabc 100644
--- a/src/test/subscription/Makefile
+++ b/src/test/subscription/Makefile
@@ -23,5 +23,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/timezone/Makefile b/src/timezone/Makefile
index fbbaae4cc5..c85e831247 100644
--- a/src/timezone/Makefile
+++ b/src/timezone/Makefile
@@ -75,5 +75,5 @@ ifeq (,$(with_system_tzdata))
 endif
 	$(MAKE) -C tznames $@
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f zic$(X) $(ZICOBJS) abbrevs.txt
diff --git a/src/tools/ifaddrs/Makefile b/src/tools/ifaddrs/Makefile
index e74d754769..ef5e8f0e0e 100644
--- a/src/tools/ifaddrs/Makefile
+++ b/src/tools/ifaddrs/Makefile
@@ -24,5 +24,5 @@ all: test_ifaddrs
 test_ifaddrs: test_ifaddrs.o $(libpq_backend_dir)/ifaddr.o
 	$(CC) $(CFLAGS) test_ifaddrs.o $(libpq_backend_dir)/ifaddr.o $(LDFLAGS) $(LDFLAGS_EX) $(LIBS) -o $@$(X)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f test_ifaddrs$(X) $(OBJS)
diff --git a/src/tools/pg_bsd_indent/Makefile b/src/tools/pg_bsd_indent/Makefile
index d176ceb326..ce5d815f07 100644
--- a/src/tools/pg_bsd_indent/Makefile
+++ b/src/tools/pg_bsd_indent/Makefile
@@ -39,7 +39,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_bsd_indent$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_bsd_indent$(X) $(OBJS)
 	rm -rf log/ tmp_check/
 

base-commit: 00f2a2556c9b23050e4f987e5d563b6856b83fc2
-- 
2.41.0

From c386175ab4194aa2b17a8374f73a9de4aa0edb56 Mon Sep 17 00:00:00 2001
From: Peter Eisentraut <peter@eisentraut.org>
Date: Wed, 23 Aug 2023 12:15:42 +0200
Subject: [PATCH v4] Remove distprep

A PostgreSQL release tarball contains a number of prebuilt files, in
particular files produced by bison, flex, perl, and well as html and
man documentation.  We have done this consistent with established
practice at the time to not require these tools for building from a
tarball.  Some of these tools were hard to get, or get the right
version of, from time to time, and shipping the prebuilt output was a
convenience to users.

Now this has at least two problems:

One, we have to make the build system(s) work in two modes: Building
from a git checkout and building from a tarball.  This is pretty
complicated, but it works so far for autoconf/make.  It does not
currently work for meson; you can currently only build with meson from
a git checkout.  Making meson builds work from a tarball seems very
difficult or impossible.  One particular problem is that since meson
requires a separate build directory, we cannot make the build update
files like gram.h in the source tree.  So if you were to build from a
tarball and update gram.y, you will have a gram.h in the source tree
and one in the build tree, but the way things work is that the
compiler will always use the one in the source tree.  So you cannot,
for example, make any gram.y changes when building from a tarball.
This seems impossible to fix in a non-horrible way.

Second, there is increased interest nowadays in precisely tracking the
origin of software.  We can reasonably track contributions into the
git tree, and users can reasonably track the path from a tarball to
packages and downloads and installs.  But what happens between the git
tree and the tarball is obscure and in some cases non-reproducible.

The solution for both of these issues is to get rid of the step that
adds prebuilt files to the tarball.  The tarball now only contains
what is in the git tree (*).  Getting the additional build
dependencies is no longer a problem nowadays, and the complications to
keep these dual build modes working are significant.  And of course we
want to get the meson build system working universally.

This commit removes the make distprep target altogether.  The make
dist target continues to do its job, it just doesn't call distprep
anymore.

(*) - The tarball also contains the INSTALL file that is built at make
dist time, but not by distprep.  This is unchanged for now.

The make maintainer-clean target, whose job it is to remove the
prebuilt files in addition to what make distclean does, is now just an
alias to make distprep.  (In practice, it is probably obsolete given
that git clean is available.)

The following programs are now hard build requirements in configure
(they were already required by meson.build):

- bison
- flex
- perl
---
 GNUmakefile.in                                |  6 +-
 config/perl.m4                                |  9 +-
 config/programs.m4                            | 21 +----
 configure                                     | 62 ++------------
 contrib/cube/Makefile                         |  7 +-
 contrib/fuzzystrmatch/Makefile                |  9 +-
 contrib/seg/Makefile                          |  7 +-
 doc/Makefile                                  |  2 +-
 doc/src/Makefile                              |  2 +-
 doc/src/sgml/Makefile                         |  9 +-
 doc/src/sgml/installation.sgml                | 83 ++++++++-----------
 meson.build                                   |  2 +-
 src/Makefile                                  |  5 +-
 src/Makefile.global.in                        | 30 +++----
 src/backend/Makefile                          | 68 ++-------------
 src/backend/bootstrap/Makefile                |  6 +-
 src/backend/catalog/Makefile                  | 14 +---
 src/backend/jit/llvm/Makefile                 |  2 +-
 src/backend/nls.mk                            |  2 +-
 src/backend/nodes/Makefile                    | 12 +--
 src/backend/parser/Makefile                   |  8 +-
 src/backend/port/Makefile                     |  2 +-
 src/backend/replication/Makefile              | 10 ++-
 .../replication/libpqwalreceiver/Makefile     |  2 +-
 src/backend/replication/pgoutput/Makefile     |  2 +-
 src/backend/snowball/Makefile                 |  4 -
 src/backend/storage/lmgr/Makefile             |  4 +-
 src/backend/utils/Makefile                    | 28 ++-----
 src/backend/utils/activity/Makefile           |  2 +-
 src/backend/utils/adt/Makefile                |  5 +-
 src/backend/utils/mb/Makefile                 |  2 +-
 src/backend/utils/mb/Unicode/Makefile         |  2 -
 src/backend/utils/mb/conversion_procs/proc.mk |  2 +-
 src/backend/utils/misc/Makefile               |  3 +-
 src/bin/initdb/Makefile                       |  2 +-
 src/bin/pg_amcheck/Makefile                   |  2 +-
 src/bin/pg_archivecleanup/Makefile            |  2 +-
 src/bin/pg_basebackup/Makefile                |  2 +-
 src/bin/pg_checksums/Makefile                 |  2 +-
 src/bin/pg_config/Makefile                    |  2 +-
 src/bin/pg_controldata/Makefile               |  2 +-
 src/bin/pg_ctl/Makefile                       |  2 +-
 src/bin/pg_dump/Makefile                      |  2 +-
 src/bin/pg_resetwal/Makefile                  |  2 +-
 src/bin/pg_rewind/Makefile                    |  2 +-
 src/bin/pg_test_fsync/Makefile                |  2 +-
 src/bin/pg_test_timing/Makefile               |  2 +-
 src/bin/pg_upgrade/Makefile                   |  2 +-
 src/bin/pg_verifybackup/Makefile              |  2 +-
 src/bin/pg_waldump/Makefile                   |  2 +-
 src/bin/pgbench/Makefile                      |  4 -
 src/bin/psql/Makefile                         |  6 --
 src/bin/scripts/Makefile                      |  2 +-
 src/common/Makefile                           |  5 --
 src/common/unicode/Makefile                   |  2 -
 src/fe_utils/Makefile                         |  6 --
 src/include/Makefile                          |  2 +-
 src/interfaces/ecpg/Makefile                  |  2 +-
 src/interfaces/ecpg/compatlib/Makefile        |  2 -
 src/interfaces/ecpg/ecpglib/Makefile          |  2 -
 src/interfaces/ecpg/include/Makefile          |  2 +-
 src/interfaces/ecpg/pgtypeslib/Makefile       |  2 -
 src/interfaces/ecpg/preproc/Makefile          |  6 --
 src/interfaces/ecpg/test/Makefile             |  4 +-
 src/interfaces/libpq/Makefile                 |  3 -
 src/interfaces/libpq/test/Makefile            |  2 +-
 src/makefiles/pgxs.mk                         |  2 +-
 src/nls-global.mk                             |  2 +-
 src/pl/plperl/GNUmakefile                     |  2 +-
 src/pl/plpgsql/src/Makefile                   |  7 --
 src/pl/plpython/Makefile                      |  6 +-
 src/pl/tcl/Makefile                           |  5 --
 src/port/Makefile                             |  2 +-
 src/test/authentication/Makefile              |  2 +-
 src/test/examples/Makefile                    |  2 +-
 src/test/icu/Makefile                         |  2 +-
 src/test/isolation/Makefile                   |  4 -
 src/test/kerberos/Makefile                    |  2 +-
 src/test/ldap/Makefile                        |  2 +-
 src/test/locale/Makefile                      |  2 +-
 src/test/recovery/Makefile                    |  2 +-
 src/test/regress/GNUmakefile                  |  2 +-
 src/test/ssl/Makefile                         |  2 +-
 src/test/ssl/sslfiles.mk                      |  4 +-
 src/test/subscription/Makefile                |  2 +-
 src/timezone/Makefile                         |  2 +-
 src/tools/ifaddrs/Makefile                    |  2 +-
 src/tools/pg_bsd_indent/Makefile              |  2 +-
 88 files changed, 169 insertions(+), 409 deletions(-)

diff --git a/GNUmakefile.in b/GNUmakefile.in
index 9c18c56233..80db4c73f8 100644
--- a/GNUmakefile.in
+++ b/GNUmakefile.in
@@ -41,7 +41,7 @@ install-world-bin-contrib-recurse: install-world-bin-src-recurse
 
 $(call recurse,installdirs uninstall init-po update-po,doc src config)
 
-$(call recurse,distprep coverage,doc src config contrib)
+$(call recurse,coverage,doc src config contrib)
 
 # clean, distclean, etc should apply to contrib too, even though
 # it's not built by default
@@ -53,7 +53,7 @@ clean:
 
 # Important: distclean `src' last, otherwise Makefile.global
 # will be gone too soon.
-distclean maintainer-clean:
+distclean:
 	$(MAKE) -C doc $@
 	$(MAKE) -C contrib $@
 	$(MAKE) -C config $@
@@ -109,7 +109,6 @@ distdir:
 	      || cp "$(top_srcdir)/$$file" "$(distdir)/$$file"; \
 	  fi || exit; \
 	done
-	$(MAKE) -C $(distdir) distprep
 	$(MAKE) -C $(distdir)/doc/src/sgml/ INSTALL
 	cp $(distdir)/doc/src/sgml/INSTALL $(distdir)/
 	$(MAKE) -C $(distdir) distclean
@@ -122,7 +121,6 @@ distcheck: dist
 	install_prefix=`cd $(dummy) && pwd`; \
 	cd $(distdir) \
 	&& ./configure --prefix="$$install_prefix"
-	$(MAKE) -C $(distdir) -q distprep
 	$(MAKE) -C $(distdir)
 	$(MAKE) -C $(distdir) install
 	$(MAKE) -C $(distdir) uninstall
diff --git a/config/perl.m4 b/config/perl.m4
index 8126e79f67..1a3bb55649 100644
--- a/config/perl.m4
+++ b/config/perl.m4
@@ -13,19 +13,14 @@ if test "$PERL"; then
   if echo "$pgac_perl_version" | sed ['s/[.a-z_]/ /g'] | \
     $AWK '{ if ([$]1 == 5 && ([$]2 >= 14)) exit 1; else exit 0;}'
   then
-    AC_MSG_WARN([
+    AC_MSG_ERROR([
 *** The installed version of Perl, $PERL, is too old to use with PostgreSQL.
 *** Perl version 5.14 or later is required, but this is $pgac_perl_version.])
-    PERL=""
   fi
 fi
 
 if test -z "$PERL"; then
-  AC_MSG_WARN([
-*** Without Perl you will not be able to build PostgreSQL from Git.
-*** You can obtain Perl from any CPAN mirror site.
-*** (If you are using the official distribution of PostgreSQL then you do not
-*** need to worry about this, because the Perl output is pre-generated.)])
+  AC_MSG_ERROR([Perl not found])
 fi
 ])# PGAC_PATH_PERL
 
diff --git a/config/programs.m4 b/config/programs.m4
index 8a118b4e03..490ec9fe9f 100644
--- a/config/programs.m4
+++ b/config/programs.m4
@@ -33,10 +33,9 @@ if test "$BISON"; then
   AC_MSG_NOTICE([using $pgac_bison_version])
   if echo "$pgac_bison_version" | $AWK '{ if ([$]4 < 2.3) exit 0; else exit 1;}'
   then
-    AC_MSG_WARN([
+    AC_MSG_ERROR([
 *** The installed version of Bison, $BISON, is too old to use with PostgreSQL.
 *** Bison version 2.3 or later is required, but this is $pgac_bison_version.])
-    BISON=""
   fi
   # Bison >=3.0 issues warnings about %name-prefix="base_yy", instead
   # of the now preferred %name-prefix "base_yy", but the latter
@@ -49,12 +48,7 @@ if test "$BISON"; then
 fi
 
 if test -z "$BISON"; then
-  AC_MSG_WARN([
-*** Without Bison you will not be able to build PostgreSQL from Git nor
-*** change any of the parser definition files.  You can obtain Bison from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this, because the Bison
-*** output is pre-generated.)])
+  AC_MSG_ERROR([bison not found])
 fi
 dnl We don't need AC_SUBST(BISON) because PGAC_PATH_PROGS did it
 AC_SUBST(BISONFLAGS)
@@ -95,7 +89,7 @@ else
             pgac_cv_path_flex=$pgac_candidate
             break 2
           else
-            AC_MSG_WARN([
+            AC_MSG_ERROR([
 *** The installed version of Flex, $pgac_candidate, is too old to use with PostgreSQL.
 *** Flex version 2.5.35 or later is required, but this is $pgac_flex_version.])
           fi
@@ -109,14 +103,7 @@ fi
 ])[]dnl AC_CACHE_CHECK
 
 if test x"$pgac_cv_path_flex" = x"no"; then
-  AC_MSG_WARN([
-*** Without Flex you will not be able to build PostgreSQL from Git nor
-*** change any of the scanner definition files.  You can obtain Flex from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this because the Flex
-*** output is pre-generated.)])
-
-  FLEX=
+  AC_MSG_ERROR([flex not found])
 else
   FLEX=$pgac_cv_path_flex
   pgac_flex_version=`$FLEX --version 2>/dev/null`
diff --git a/configure b/configure
index d47e0f8b26..514cee190d 100755
--- a/configure
+++ b/configure
@@ -10160,13 +10160,9 @@ if test "$BISON"; then
 $as_echo "$as_me: using $pgac_bison_version" >&6;}
   if echo "$pgac_bison_version" | $AWK '{ if ($4 < 2.3) exit 0; else exit 1;}'
   then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** The installed version of Bison, $BISON, is too old to use with PostgreSQL.
-*** Bison version 2.3 or later is required, but this is $pgac_bison_version." >&5
-$as_echo "$as_me: WARNING:
+    as_fn_error $? "
 *** The installed version of Bison, $BISON, is too old to use with PostgreSQL.
-*** Bison version 2.3 or later is required, but this is $pgac_bison_version." >&2;}
-    BISON=""
+*** Bison version 2.3 or later is required, but this is $pgac_bison_version." "$LINENO" 5
   fi
   # Bison >=3.0 issues warnings about %name-prefix="base_yy", instead
   # of the now preferred %name-prefix "base_yy", but the latter
@@ -10179,18 +10175,7 @@ $as_echo "$as_me: WARNING:
 fi
 
 if test -z "$BISON"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** Without Bison you will not be able to build PostgreSQL from Git nor
-*** change any of the parser definition files.  You can obtain Bison from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this, because the Bison
-*** output is pre-generated.)" >&5
-$as_echo "$as_me: WARNING:
-*** Without Bison you will not be able to build PostgreSQL from Git nor
-*** change any of the parser definition files.  You can obtain Bison from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this, because the Bison
-*** output is pre-generated.)" >&2;}
+  as_fn_error $? "bison not found" "$LINENO" 5
 fi
 
 
@@ -10223,12 +10208,9 @@ else
             pgac_cv_path_flex=$pgac_candidate
             break 2
           else
-            { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** The installed version of Flex, $pgac_candidate, is too old to use with PostgreSQL.
-*** Flex version 2.5.35 or later is required, but this is $pgac_flex_version." >&5
-$as_echo "$as_me: WARNING:
+            as_fn_error $? "
 *** The installed version of Flex, $pgac_candidate, is too old to use with PostgreSQL.
-*** Flex version 2.5.35 or later is required, but this is $pgac_flex_version." >&2;}
+*** Flex version 2.5.35 or later is required, but this is $pgac_flex_version." "$LINENO" 5
           fi
         fi
       fi
@@ -10242,20 +10224,7 @@ fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv_path_flex" >&5
 $as_echo "$pgac_cv_path_flex" >&6; }
 if test x"$pgac_cv_path_flex" = x"no"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** Without Flex you will not be able to build PostgreSQL from Git nor
-*** change any of the scanner definition files.  You can obtain Flex from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this because the Flex
-*** output is pre-generated.)" >&5
-$as_echo "$as_me: WARNING:
-*** Without Flex you will not be able to build PostgreSQL from Git nor
-*** change any of the scanner definition files.  You can obtain Flex from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this because the Flex
-*** output is pre-generated.)" >&2;}
-
-  FLEX=
+  as_fn_error $? "flex not found" "$LINENO" 5
 else
   FLEX=$pgac_cv_path_flex
   pgac_flex_version=`$FLEX --version 2>/dev/null`
@@ -10329,27 +10298,14 @@ $as_echo "$as_me: using perl $pgac_perl_version" >&6;}
   if echo "$pgac_perl_version" | sed 's/[.a-z_]/ /g' | \
     $AWK '{ if ($1 == 5 && ($2 >= 14)) exit 1; else exit 0;}'
   then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** The installed version of Perl, $PERL, is too old to use with PostgreSQL.
-*** Perl version 5.14 or later is required, but this is $pgac_perl_version." >&5
-$as_echo "$as_me: WARNING:
+    as_fn_error $? "
 *** The installed version of Perl, $PERL, is too old to use with PostgreSQL.
-*** Perl version 5.14 or later is required, but this is $pgac_perl_version." >&2;}
-    PERL=""
+*** Perl version 5.14 or later is required, but this is $pgac_perl_version." "$LINENO" 5
   fi
 fi
 
 if test -z "$PERL"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** Without Perl you will not be able to build PostgreSQL from Git.
-*** You can obtain Perl from any CPAN mirror site.
-*** (If you are using the official distribution of PostgreSQL then you do not
-*** need to worry about this, because the Perl output is pre-generated.)" >&5
-$as_echo "$as_me: WARNING:
-*** Without Perl you will not be able to build PostgreSQL from Git.
-*** You can obtain Perl from any CPAN mirror site.
-*** (If you are using the official distribution of PostgreSQL then you do not
-*** need to worry about this, because the Perl output is pre-generated.)" >&2;}
+  as_fn_error $? "Perl not found" "$LINENO" 5
 fi
 
 if test "$with_perl" = yes; then
diff --git a/contrib/cube/Makefile b/contrib/cube/Makefile
index 4fd19aac35..dfb0d806e4 100644
--- a/contrib/cube/Makefile
+++ b/contrib/cube/Makefile
@@ -18,6 +18,8 @@ REGRESS = cube cube_sci
 
 SHLIB_LINK += $(filter -lm, $(LIBS))
 
+EXTRA_CLEAN = cubeparse.h cubeparse.c cubescan.c
+
 ifdef USE_PGXS
 PG_CONFIG = pg_config
 PGXS := $(shell $(PG_CONFIG) --pgxs)
@@ -37,8 +39,3 @@ cubeparse.c: BISONFLAGS += -d
 
 # Force these dependencies to be known even without dependency info built:
 cubeparse.o cubescan.o: cubeparse.h
-
-distprep: cubeparse.c cubescan.c
-
-maintainer-clean:
-	rm -f cubeparse.h cubeparse.c cubescan.c
diff --git a/contrib/fuzzystrmatch/Makefile b/contrib/fuzzystrmatch/Makefile
index e68bc0e33f..04c83a34a7 100644
--- a/contrib/fuzzystrmatch/Makefile
+++ b/contrib/fuzzystrmatch/Makefile
@@ -15,6 +15,8 @@ PGFILEDESC = "fuzzystrmatch - similarities and distance between strings"
 
 REGRESS = fuzzystrmatch fuzzystrmatch_utf8
 
+EXTRA_CLEAN = daitch_mokotoff.h
+
 ifdef USE_PGXS
 PG_CONFIG = pg_config
 PGXS := $(shell $(PG_CONFIG) --pgxs)
@@ -31,10 +33,3 @@ daitch_mokotoff.o: daitch_mokotoff.h
 
 daitch_mokotoff.h: daitch_mokotoff_header.pl
 	$(PERL) $< $@
-
-# daitch_mokotoff.h is included in tarballs, so it has to be made by
-# "distprep" and not cleaned except by "maintainer-clean".
-distprep: daitch_mokotoff.h
-
-maintainer-clean:
-	rm -f daitch_mokotoff.h
diff --git a/contrib/seg/Makefile b/contrib/seg/Makefile
index a1e49bf051..132ec8dbfe 100644
--- a/contrib/seg/Makefile
+++ b/contrib/seg/Makefile
@@ -16,7 +16,7 @@ HEADERS = segdata.h
 
 REGRESS = security seg
 
-EXTRA_CLEAN = y.tab.c y.tab.h
+EXTRA_CLEAN = segparse.h segparse.c segscan.c
 
 ifdef USE_PGXS
 PG_CONFIG = pg_config
@@ -38,8 +38,3 @@ segparse.c: BISONFLAGS += -d
 
 # Force these dependencies to be known even without dependency info built:
 segparse.o segscan.o: segparse.h
-
-distprep: segparse.c segscan.c
-
-maintainer-clean:
-	rm -f segparse.h segparse.c segscan.c
diff --git a/doc/Makefile b/doc/Makefile
index aee3cc0965..24370fc903 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -12,5 +12,5 @@ subdir = doc
 top_builddir = ..
 include $(top_builddir)/src/Makefile.global
 
-all distprep html man install installdirs uninstall clean distclean maintainer-clean:
+all html man install installdirs uninstall clean distclean:
 	$(MAKE) -C src $@
diff --git a/doc/src/Makefile b/doc/src/Makefile
index 30d883815a..2ed02084ff 100644
--- a/doc/src/Makefile
+++ b/doc/src/Makefile
@@ -4,5 +4,5 @@ subdir = doc/src
 top_builddir = ../..
 include $(top_builddir)/src/Makefile.global
 
-all distprep html man install installdirs uninstall clean distclean maintainer-clean:
+all html man install installdirs uninstall clean distclean:
 	$(MAKE) -C sgml $@
diff --git a/doc/src/sgml/Makefile b/doc/src/sgml/Makefile
index 1e55e531db..82d57674a2 100644
--- a/doc/src/sgml/Makefile
+++ b/doc/src/sgml/Makefile
@@ -7,8 +7,7 @@
 #----------------------------------------------------------------------------
 
 # This makefile is for building and installing the documentation.
-# When a release tarball is created, the documentation files are
-# prepared using the distprep target.  In Git-based trees these files
+# In Git-based trees these files
 # don't exist, unless explicitly built, so we skip the installation in
 # that case.
 
@@ -28,8 +27,6 @@ include $(top_builddir)/src/Makefile.global
 
 all: html man
 
-distprep: html distprep-man
-
 
 ifndef DBTOEPUB
 DBTOEPUB = $(missing) dbtoepub
@@ -77,7 +74,7 @@ postgres-full.xml: postgres.sgml $(ALLSGML)
 ## Man pages
 ##
 
-man distprep-man: man-stamp
+man: man-stamp
 
 man-stamp: stylesheet-man.xsl postgres-full.xml
 	$(XSLTPROC) $(XMLINCLUDE) $(XSLTPROCFLAGS) $(XSLTPROC_MAN_FLAGS) $^
@@ -305,8 +302,6 @@ clean:
 	rm -f *.texixml *.texi *.info db2texi.refs
 
 distclean: clean
-
-maintainer-clean: distclean
 # HTML
 	rm -fr html/ html-stamp
 # man
diff --git a/doc/src/sgml/installation.sgml b/doc/src/sgml/installation.sgml
index ac8eee47c6..8eb928903e 100644
--- a/doc/src/sgml/installation.sgml
+++ b/doc/src/sgml/installation.sgml
@@ -72,8 +72,7 @@ <title>Requirements</title>
 
       Alternatively, <productname>PostgreSQL</productname> can be built using
       <ulink url="https://mesonbuild.com/">Meson</ulink>.  This is currently
-      experimental and only works when building from a Git checkout (not from
-      a distribution tarball).  If you choose to use
+      experimental.  If you choose to use
       <application>Meson</application>, then you don't need
       <acronym>GNU</acronym> <application>make</application>, but the other
       requirements below still apply.
@@ -102,6 +101,41 @@ <title>Requirements</title>
      </para>
     </listitem>
 
+    <listitem>
+     <para>
+      <indexterm>
+       <primary>flex</primary>
+      </indexterm>
+      <indexterm>
+       <primary>lex</primary>
+      </indexterm>
+      <indexterm>
+       <primary>bison</primary>
+      </indexterm>
+      <indexterm>
+       <primary>yacc</primary>
+      </indexterm>
+
+      <application>Flex</application> 2.5.35 or later and
+      <application>Bison</application> 2.3 or later are required.  Other
+      <application>lex</application> and <application>yacc</application>
+      programs cannot be used.
+     </para>
+    </listitem>
+
+    <listitem>
+     <para>
+      <indexterm>
+       <primary>perl</primary>
+      </indexterm>
+
+      <application>Perl</application> 5.14 or later is needed during the build
+      process and to run some test suites.  (This requirement is separate from
+      the requirements for building <application>PL/Perl</application>; see
+      below.)
+     </para>
+    </listitem>
+
     <listitem>
      <para>
       <indexterm>
@@ -315,51 +349,6 @@ <title>Requirements</title>
    </itemizedlist>
   </para>
 
-  <para>
-   If you are building from a <productname>Git</productname> tree instead of
-   using a released source package, or if you want to do server development,
-   you also need the following packages:
-
-   <itemizedlist>
-    <listitem>
-     <para>
-      <indexterm>
-       <primary>flex</primary>
-      </indexterm>
-      <indexterm>
-       <primary>lex</primary>
-      </indexterm>
-      <indexterm>
-       <primary>bison</primary>
-      </indexterm>
-      <indexterm>
-       <primary>yacc</primary>
-      </indexterm>
-
-      <application>Flex</application> and <application>Bison</application>
-      are needed to build from a Git checkout, or if you changed the actual
-      scanner and parser definition files. If you need them, be sure
-      to get <application>Flex</application> 2.5.35 or later and
-      <application>Bison</application> 2.3 or later. Other <application>lex</application>
-      and <application>yacc</application> programs cannot be used.
-     </para>
-    </listitem>
-    <listitem>
-     <para>
-      <indexterm>
-       <primary>perl</primary>
-      </indexterm>
-
-      <application>Perl</application> 5.14 or later is needed to build from a Git checkout,
-      or if you changed the input files for any of the build steps that
-      use Perl scripts.  If building on Windows you will need
-      <application>Perl</application> in any case.  <application>Perl</application> is
-      also required to run some test suites.
-     </para>
-    </listitem>
-   </itemizedlist>
-  </para>
-
   <para>
    If you need to get a <acronym>GNU</acronym> package, you can find
    it at your local <acronym>GNU</acronym> mirror site (see <ulink
diff --git a/meson.build b/meson.build
index f5ec442f9a..040d5c869b 100644
--- a/meson.build
+++ b/meson.build
@@ -72,7 +72,7 @@ configure. Alternatively use a separate check out for meson based builds.
 @0@
 ****'''
 if fs.exists(meson.current_source_dir() / 'src' / 'include' / 'pg_config.h')
-  errmsg_cleanup = 'To clean up, run make maintainer-clean in the source tree.'
+  errmsg_cleanup = 'To clean up, run make distclean in the source tree.'
   error(errmsg_nonclean_base.format(errmsg_cleanup))
 endif
 
diff --git a/src/Makefile b/src/Makefile
index 94649c36c7..2f31a2f20a 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -59,16 +59,13 @@ uninstall: uninstall-local
 uninstall-local:
 	rm -f $(addprefix '$(DESTDIR)$(pgxsdir)/$(subdir)'/, Makefile.global Makefile.port Makefile.shlib nls-global.mk)
 
-distprep:
-	$(MAKE) -C test/isolation $@
-
 clean:
 	$(MAKE) -C test $@
 	$(MAKE) -C tutorial NO_PGXS=1 $@
 	$(MAKE) -C test/isolation $@
 	$(MAKE) -C tools/pg_bsd_indent $@
 
-distclean maintainer-clean:
+distclean:
 	$(MAKE) -C test $@
 	$(MAKE) -C tutorial NO_PGXS=1 $@
 	$(MAKE) -C test/isolation $@
diff --git a/src/Makefile.global.in b/src/Makefile.global.in
index df9f721a41..2159692439 100644
--- a/src/Makefile.global.in
+++ b/src/Makefile.global.in
@@ -19,11 +19,11 @@
 #
 # Meta configuration
 
-standard_targets = all install installdirs uninstall distprep clean distclean maintainer-clean coverage check checkprep installcheck init-po update-po
+standard_targets = all install installdirs uninstall clean distclean coverage check checkprep installcheck init-po update-po
 # these targets should recurse even into subdirectories not being built:
-standard_always_targets = distprep clean distclean maintainer-clean
+standard_always_targets = clean distclean
 
-.PHONY: $(standard_targets) install-strip html man installcheck-parallel update-unicode
+.PHONY: $(standard_targets) maintainer-clean install-strip html man installcheck-parallel update-unicode
 
 # make `all' the default target
 all:
@@ -35,6 +35,8 @@ all:
 # Never delete any intermediate files automatically.
 .SECONDARY:
 
+maintainer-clean: distclean
+
 # PostgreSQL version number
 VERSION = @PACKAGE_VERSION@
 MAJORVERSION = @PG_MAJORVERSION@
@@ -319,12 +321,8 @@ X = @EXEEXT@
 
 # Perl
 
-ifneq (@PERL@,)
-    # quoted to protect pathname with spaces
-    PERL		= '@PERL@'
-else
-    PERL		= $(missing) perl
-endif
+# quoted to protect pathname with spaces
+PERL		= '@PERL@'
 perl_archlibexp		= @perl_archlibexp@
 perl_privlibexp		= @perl_privlibexp@
 perl_includespec	= @perl_includespec@
@@ -765,21 +763,13 @@ TAS         = @TAS@
 # Global targets and rules
 
 %.c: %.l
-ifdef FLEX
 	$(FLEX) $(if $(FLEX_NO_BACKUP),-b) $(FLEXFLAGS) -o'$@' $<
 	@$(if $(FLEX_NO_BACKUP),if [ `wc -l <lex.backup` -eq 1 ]; then rm lex.backup; else echo "Scanner requires backup; see lex.backup." 1>&2; exit 1; fi)
 	$(if $(FLEX_FIX_WARNING),$(PERL) $(top_srcdir)/src/tools/fix-old-flex-code.pl '$@')
-else
-	@$(missing) flex $< '$@'
-endif
 
 %.c: %.y
 	$(if $(BISON_CHECK_CMD),$(BISON_CHECK_CMD))
-ifdef BISON
 	$(BISON) $(BISONFLAGS) -o $@ $<
-else
-	@$(missing) bison $< $@
-endif
 
 %.i: %.c
 	$(CPP) $(CPPFLAGS) -o $@ $<
@@ -907,7 +897,7 @@ recurse = $(foreach target,$(if $1,$1,$(standard_targets)),$(foreach subdir,$(if
 # If a makefile's list of SUBDIRS varies depending on configuration, then
 # any subdirectories excluded from SUBDIRS should instead be added to
 # ALWAYS_SUBDIRS, and then it must call recurse_always as well as recurse.
-# This ensures that distprep, distclean, etc will apply to all subdirectories.
+# This ensures that distclean, etc will apply to all subdirectories.
 # In the normal case all arguments will be defaulted.
 # $1: targets to make recursive (defaults to standard_always_targets)
 # $2: list of subdirs (defaults to ALWAYS_SUBDIRS variable)
@@ -962,7 +952,7 @@ include $(Po_files)
 endif
 
 # hook for clean-up
-clean distclean maintainer-clean: clean-deps
+clean distclean: clean-deps
 
 .PHONY: clean-deps
 clean-deps:
@@ -1046,7 +1036,7 @@ lcov_test.info: $(all_gcda_files)
 
 
 # hook for clean-up
-clean distclean maintainer-clean: clean-coverage
+clean distclean: clean-coverage
 
 .PHONY: clean-coverage
 clean-coverage:
diff --git a/src/backend/Makefile b/src/backend/Makefile
index 3e275ac759..b62ced35cc 100644
--- a/src/backend/Makefile
+++ b/src/backend/Makefile
@@ -138,63 +138,38 @@ utils/activity/wait_event_types.h: utils/activity/generate-wait_event_types.pl u
 
 # run this unconditionally to avoid needing to know its dependencies here:
 submake-catalog-headers:
-	$(MAKE) -C catalog distprep generated-header-symlinks
+	$(MAKE) -C catalog generated-header-symlinks
 
 # run this unconditionally to avoid needing to know its dependencies here:
 submake-nodes-headers:
-	$(MAKE) -C nodes distprep generated-header-symlinks
+	$(MAKE) -C nodes generated-header-symlinks
 
 # run this unconditionally to avoid needing to know its dependencies here:
 submake-utils-headers:
-	$(MAKE) -C utils distprep generated-header-symlinks
+	$(MAKE) -C utils generated-header-symlinks
 
 .PHONY: submake-catalog-headers submake-nodes-headers submake-utils-headers
 
 # Make symlinks for these headers in the include directory. That way
 # we can cut down on the -I options. Also, a symlink is automatically
 # up to date when we update the base file.
-#
-# The point of the prereqdir incantation in some of the rules below is to
-# force the symlink to use an absolute path rather than a relative path.
-# For headers which are generated by make distprep, the actual header within
-# src/backend will be in the source tree, while the symlink in src/include
-# will be in the build tree, so a simple ../.. reference won't work.
-# For headers generated during regular builds, we prefer a relative symlink.
 
 .PHONY: generated-headers
 
-generated-headers: $(top_builddir)/src/include/storage/lwlocknames.h $(top_builddir)/src/include/utils/wait_event_types.h submake-catalog-headers submake-nodes-headers submake-utils-headers
+generated-headers: $(top_builddir)/src/include/storage/lwlocknames.h $(top_builddir)/src/include/utils/wait_event_types.h submake-catalog-headers submake-nodes-headers submake-utils-headers parser/gram.h
 
 $(top_builddir)/src/include/storage/lwlocknames.h: storage/lmgr/lwlocknames.h
-	prereqdir=`cd '$(dir $<)' >/dev/null && pwd` && \
-	  cd '$(dir $@)' && rm -f $(notdir $@) && \
-	  $(LN_S) "$$prereqdir/$(notdir $<)" .
+	rm -f '$@'
+	$(LN_S) ../../backend/$< '$@'
 
 $(top_builddir)/src/include/utils/wait_event_types.h: utils/activity/wait_event_types.h
-	prereqdir=`cd '$(dir $<)' >/dev/null && pwd` && \
-	  cd '$(dir $@)' && rm -f $(notdir $@) && \
-	  $(LN_S) "$$prereqdir/$(notdir $<)" .
+	rm -f '$@'
+	$(LN_S) ../../backend/$< '$@'
 
 utils/probes.o: utils/probes.d $(SUBDIROBJS)
 	$(DTRACE) $(DTRACEFLAGS) -C -G -s $(call expand_subsys,$^) -o $@
 
 
-##########################################################################
-
-# Be sure that these files get removed by the maintainer-clean target
-distprep:
-	$(MAKE) -C parser	gram.c gram.h scan.c
-	$(MAKE) -C bootstrap	bootparse.c bootparse.h bootscanner.c
-	$(MAKE) -C catalog	distprep
-	$(MAKE) -C nodes	distprep
-	$(MAKE) -C replication	repl_gram.c repl_gram.h repl_scanner.c syncrep_gram.c syncrep_gram.h syncrep_scanner.c
-	$(MAKE) -C storage/lmgr	lwlocknames.h lwlocknames.c
-	$(MAKE) -C utils	distprep
-	$(MAKE) -C utils/activity	wait_event_types.h pgstat_wait_event.c
-	$(MAKE) -C utils/adt	jsonpath_gram.c jsonpath_gram.h jsonpath_scan.c
-	$(MAKE) -C utils/misc	guc-file.c
-
-
 ##########################################################################
 
 install: all installdirs install-bin
@@ -290,34 +265,9 @@ ifeq ($(PORTNAME), win32)
 endif
 
 distclean: clean
+# generated by configure
 	rm -f port/tas.s port/pg_sema.c port/pg_shmem.c
 
-maintainer-clean: distclean
-	$(MAKE) -C catalog $@
-	$(MAKE) -C nodes $@
-	$(MAKE) -C utils $@
-	rm -f bootstrap/bootparse.c \
-	      bootstrap/bootparse.h \
-	      bootstrap/bootscanner.c \
-	      parser/gram.c \
-	      parser/gram.h \
-	      parser/scan.c \
-	      replication/repl_gram.c \
-	      replication/repl_gram.h \
-	      replication/repl_scanner.c \
-	      replication/syncrep_gram.c \
-	      replication/syncrep_gram.h \
-	      replication/syncrep_scanner.c \
-	      storage/lmgr/lwlocknames.c \
-	      storage/lmgr/lwlocknames.h \
-	      utils/activity/pgstat_wait_event.c \
-	      utils/activity/wait_event_funcs_data.c \
-	      utils/activity/wait_event_types.h \
-	      utils/adt/jsonpath_gram.c \
-	      utils/adt/jsonpath_gram.h \
-	      utils/adt/jsonpath_scan.c \
-	      utils/misc/guc-file.c
-
 
 ##########################################################################
 #
diff --git a/src/backend/bootstrap/Makefile b/src/backend/bootstrap/Makefile
index 606c8021e7..509b51e648 100644
--- a/src/backend/bootstrap/Makefile
+++ b/src/backend/bootstrap/Makefile
@@ -28,5 +28,7 @@ bootparse.c: BISONFLAGS += -d
 # Force these dependencies to be known even without dependency info built:
 bootparse.o bootscanner.o: bootparse.h
 
-# bootparse.c and bootscanner.c are in the distribution tarball, so
-# they are not cleaned here.
+clean:
+	rm -f bootparse.c \
+	      bootparse.h \
+	      bootscanner.c
diff --git a/src/backend/catalog/Makefile b/src/backend/catalog/Makefile
index a60107bf94..b49666dae2 100644
--- a/src/backend/catalog/Makefile
+++ b/src/backend/catalog/Makefile
@@ -89,9 +89,7 @@ POSTGRES_BKI_DATA = $(addprefix $(top_srcdir)/src/include/catalog/,\
 	pg_ts_template.dat pg_type.dat \
 	)
 
-all: distprep generated-header-symlinks
-
-distprep: bki-stamp
+all: generated-header-symlinks
 
 .PHONY: generated-header-symlinks
 
@@ -110,14 +108,12 @@ bki-stamp: genbki.pl Catalog.pm $(POSTGRES_BKI_SRCS) $(POSTGRES_BKI_DATA) $(top_
 		--set-version=$(MAJORVERSION) $(POSTGRES_BKI_SRCS)
 	touch $@
 
-# The generated headers must all be symlinked into builddir/src/include/,
-# using absolute links for the reasons explained in src/backend/Makefile.
+# The generated headers must all be symlinked into src/include/.
 # We use header-stamp to record that we've done this because the symlinks
 # themselves may appear older than bki-stamp.
 $(top_builddir)/src/include/catalog/header-stamp: bki-stamp
-	prereqdir=`cd '$(dir $<)' >/dev/null && pwd` && \
 	cd '$(dir $@)' && for file in $(GENERATED_HEADERS); do \
-	  rm -f $$file && $(LN_S) "$$prereqdir/$$file" . ; \
+	  rm -f $$file && $(LN_S) "../../../$(subdir)/$$file" . ; \
 	done
 	touch $@
 
@@ -138,9 +134,5 @@ installdirs:
 uninstall-data:
 	rm -f $(addprefix '$(DESTDIR)$(datadir)'/, postgres.bki system_constraints.sql system_functions.sql system_views.sql information_schema.sql sql_features.txt)
 
-# postgres.bki, system_constraints.sql, and the generated headers are
-# in the distribution tarball, so they are not cleaned here.
 clean:
-
-maintainer-clean: clean
 	rm -f bki-stamp postgres.bki system_constraints.sql $(GENERATED_HEADERS)
diff --git a/src/backend/jit/llvm/Makefile b/src/backend/jit/llvm/Makefile
index 2da122a391..0036c4f552 100644
--- a/src/backend/jit/llvm/Makefile
+++ b/src/backend/jit/llvm/Makefile
@@ -71,6 +71,6 @@ uninstall-types:
 
 include $(top_srcdir)/src/Makefile.shlib
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 	rm -f $(OBJS)
 	rm -f llvmjit_types.bc
diff --git a/src/backend/nls.mk b/src/backend/nls.mk
index 8263527c85..f1464cc5c5 100644
--- a/src/backend/nls.mk
+++ b/src/backend/nls.mk
@@ -22,7 +22,7 @@ GETTEXT_FLAGS    = $(BACKEND_COMMON_GETTEXT_FLAGS) \
     report_invalid_record:2:c-format \
     ereport_startup_progress:1:c-format
 
-gettext-files: distprep
+gettext-files: postgres
 	find $(srcdir) $(srcdir)/../common $(srcdir)/../port -name '*.c' -print | LC_ALL=C sort >$@
 
 my-clean:
diff --git a/src/backend/nodes/Makefile b/src/backend/nodes/Makefile
index 0a95e683d0..ebbe9052cb 100644
--- a/src/backend/nodes/Makefile
+++ b/src/backend/nodes/Makefile
@@ -65,9 +65,7 @@ node_headers = \
 
 # see also catalog/Makefile for an explanation of these make rules
 
-all: distprep generated-header-symlinks
-
-distprep: node-support-stamp
+all: generated-header-symlinks
 
 .PHONY: generated-header-symlinks
 
@@ -81,14 +79,12 @@ node-support-stamp: gen_node_support.pl $(addprefix $(top_srcdir)/src/include/,$
 	$(PERL) $^
 	touch $@
 
-# These generated headers must be symlinked into builddir/src/include/,
-# using absolute links for the reasons explained in src/backend/Makefile.
+# These generated headers must be symlinked into src/include/.
 # We use header-stamp to record that we've done this because the symlinks
 # themselves may appear older than node-support-stamp.
 $(top_builddir)/src/include/nodes/header-stamp: node-support-stamp
-	prereqdir=`cd '$(dir $<)' >/dev/null && pwd` && \
 	cd '$(dir $@)' && for file in nodetags.h; do \
-	  rm -f $$file && $(LN_S) "$$prereqdir/$$file" . ; \
+	  rm -f $$file && $(LN_S) "../../../$(subdir)/$$file" . ; \
 	done
 	touch $@
 
@@ -98,5 +94,5 @@ outfuncs.o: outfuncs.c outfuncs.funcs.c outfuncs.switch.c | node-support-stamp
 queryjumblefuncs.o: queryjumblefuncs.c queryjumblefuncs.funcs.c queryjumblefuncs.switch.c | node-support-stamp
 readfuncs.o:  readfuncs.c readfuncs.funcs.c readfuncs.switch.c | node-support-stamp
 
-maintainer-clean: clean
+clean:
 	rm -f node-support-stamp $(addsuffix funcs.funcs.c,copy equal out queryjumble read) $(addsuffix funcs.switch.c,copy equal out queryjumble read) nodetags.h
diff --git a/src/backend/parser/Makefile b/src/backend/parser/Makefile
index 9f1c4022bb..401c16686c 100644
--- a/src/backend/parser/Makefile
+++ b/src/backend/parser/Makefile
@@ -64,8 +64,8 @@ scan.c: FLEX_FIX_WARNING=yes
 # Force these dependencies to be known even without dependency info built:
 gram.o scan.o parser.o: gram.h
 
-
-# gram.c, gram.h, and scan.c are in the distribution tarball, so they
-# are not cleaned here.
-clean distclean maintainer-clean:
+clean:
+	rm -f gram.c \
+	      gram.h \
+	      scan.c
 	rm -f lex.backup
diff --git a/src/backend/port/Makefile b/src/backend/port/Makefile
index 2d00b4f05a..47338d9922 100644
--- a/src/backend/port/Makefile
+++ b/src/backend/port/Makefile
@@ -43,6 +43,6 @@ else
 	$(CC) $(CFLAGS) -c $<
 endif
 
-distclean clean:
+clean:
 	rm -f tas_cpp.s
 	$(MAKE) -C win32 clean
diff --git a/src/backend/replication/Makefile b/src/backend/replication/Makefile
index 23f29ba545..7f867ee91d 100644
--- a/src/backend/replication/Makefile
+++ b/src/backend/replication/Makefile
@@ -48,6 +48,10 @@ syncrep_gram.c: BISONFLAGS += -d
 # Force these dependencies to be known even without dependency info built:
 syncrep_gram.o syncrep_scanner.o: syncrep_gram.h
 
-# repl_gram.c, repl_scanner.c, syncrep_gram.c and syncrep_scanner.c
-# are in the distribution tarball, so they are not cleaned here.
-# (Our parent Makefile takes care of them during maintainer-clean.)
+clean:
+	rm -f repl_gram.c \
+	      repl_gram.h \
+	      repl_scanner.c \
+	      syncrep_gram.c \
+	      syncrep_gram.h \
+	      syncrep_scanner.c
diff --git a/src/backend/replication/libpqwalreceiver/Makefile b/src/backend/replication/libpqwalreceiver/Makefile
index f26daa135f..e882907350 100644
--- a/src/backend/replication/libpqwalreceiver/Makefile
+++ b/src/backend/replication/libpqwalreceiver/Makefile
@@ -33,5 +33,5 @@ installdirs: installdirs-lib
 
 uninstall: uninstall-lib
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 	rm -f $(OBJS)
diff --git a/src/backend/replication/pgoutput/Makefile b/src/backend/replication/pgoutput/Makefile
index 3b41fbcfac..d89d317fe7 100644
--- a/src/backend/replication/pgoutput/Makefile
+++ b/src/backend/replication/pgoutput/Makefile
@@ -28,5 +28,5 @@ installdirs: installdirs-lib
 
 uninstall: uninstall-lib
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 	rm -f $(OBJS)
diff --git a/src/backend/snowball/Makefile b/src/backend/snowball/Makefile
index 4bebfa0250..efc4300eb9 100644
--- a/src/backend/snowball/Makefile
+++ b/src/backend/snowball/Makefile
@@ -104,8 +104,6 @@ include $(top_srcdir)/src/Makefile.shlib
 $(SQLSCRIPT): snowball_create.pl snowball_func.sql.in snowball.sql.in
 	$(PERL) $< --input ${srcdir} --outdir .
 
-distprep: $(SQLSCRIPT)
-
 install: all installdirs install-lib install-script
 	$(INSTALL_DATA) $(addprefix $(srcdir)/stopwords/,$(stop_files)) '$(DESTDIR)$(datadir)/$(DICTDIR)'
 
@@ -122,6 +120,4 @@ uninstall: uninstall-lib
 
 clean distclean: clean-lib
 	rm -f $(OBJS)
-
-maintainer-clean: distclean
 	rm -f $(SQLSCRIPT)
diff --git a/src/backend/storage/lmgr/Makefile b/src/backend/storage/lmgr/Makefile
index b25b7ee421..c48ba943c4 100644
--- a/src/backend/storage/lmgr/Makefile
+++ b/src/backend/storage/lmgr/Makefile
@@ -45,8 +45,6 @@ lwlocknames.h: $(top_srcdir)/src/backend/storage/lmgr/lwlocknames.txt generate-l
 check: s_lock_test
 	./s_lock_test
 
-clean distclean:
+clean:
 	rm -f s_lock_test
-
-maintainer-clean: clean
 	rm -f lwlocknames.h lwlocknames.c
diff --git a/src/backend/utils/Makefile b/src/backend/utils/Makefile
index deb901609f..e184e3dfdf 100644
--- a/src/backend/utils/Makefile
+++ b/src/backend/utils/Makefile
@@ -34,13 +34,14 @@ catalogdir  = $(top_srcdir)/src/backend/catalog
 
 include $(top_srcdir)/src/backend/common.mk
 
-all: distprep probes.h generated-header-symlinks
+all: probes.h generated-header-symlinks
 
-distprep: fmgr-stamp errcodes.h
+.PHONY: generated-header-symlinks submake-adt-headers
 
-.PHONY: generated-header-symlinks
+generated-header-symlinks: $(top_builddir)/src/include/utils/header-stamp submake-adt-headers
 
-generated-header-symlinks: $(top_builddir)/src/include/utils/header-stamp $(top_builddir)/src/include/utils/probes.h
+submake-adt-headers:
+	$(MAKE) -C adt jsonpath_gram.h
 
 $(SUBDIRS:%=%-recursive): fmgr-stamp errcodes.h
 
@@ -66,22 +67,15 @@ probes.h: Gen_dummy_probes.sed probes.d
 	sed -f $^ >$@
 endif
 
-# These generated headers must be symlinked into builddir/src/include/,
-# using absolute links for the reasons explained in src/backend/Makefile.
+# These generated headers must be symlinked into src/include/.
 # We use header-stamp to record that we've done this because the symlinks
 # themselves may appear older than fmgr-stamp.
-$(top_builddir)/src/include/utils/header-stamp: fmgr-stamp errcodes.h
-	prereqdir=`cd '$(dir $<)' >/dev/null && pwd` && \
-	cd '$(dir $@)' && for file in fmgroids.h fmgrprotos.h errcodes.h; do \
-	  rm -f $$file && $(LN_S) "$$prereqdir/$$file" . ; \
+$(top_builddir)/src/include/utils/header-stamp: fmgr-stamp errcodes.h probes.h
+	cd '$(dir $@)' && for file in fmgroids.h fmgrprotos.h errcodes.h probes.h; do \
+	  rm -f $$file && $(LN_S) "../../../$(subdir)/$$file" . ; \
 	done
 	touch $@
 
-# probes.h is handled differently because it's not in the distribution tarball.
-$(top_builddir)/src/include/utils/probes.h: probes.h
-	cd '$(dir $@)' && rm -f $(notdir $@) && \
-	    $(LN_S) "../../../$(subdir)/probes.h" .
-
 # Recipe for rebuilding the Perl version of Gen_dummy_probes
 # Nothing depends on it, so it will never be called unless explicitly requested
 # The last two lines of the recipe format the script according to  our
@@ -104,10 +98,6 @@ installdirs:
 uninstall-data:
 	rm -f $(addprefix '$(DESTDIR)$(datadir)'/, errcodes.txt)
 
-# fmgroids.h, fmgrprotos.h, fmgrtab.c, fmgr-stamp, and errcodes.h are in the
-# distribution tarball, so they are not cleaned here.
 clean:
 	rm -f probes.h probes.h.tmp
-
-maintainer-clean: clean
 	rm -f fmgroids.h fmgrprotos.h fmgrtab.c fmgr-stamp errcodes.h
diff --git a/src/backend/utils/activity/Makefile b/src/backend/utils/activity/Makefile
index f57cf3958c..a4397ef907 100644
--- a/src/backend/utils/activity/Makefile
+++ b/src/backend/utils/activity/Makefile
@@ -47,5 +47,5 @@ pgstat_wait_event.c: wait_event_types.h
 wait_event_types.h: $(top_srcdir)/src/backend/utils/activity/wait_event_names.txt generate-wait_event_types.pl
 	$(PERL) $(srcdir)/generate-wait_event_types.pl --code $<
 
-maintainer-clean: clean
+clean:
 	rm -f wait_event_types.h pgstat_wait_event.c wait_event_funcs_data.c
diff --git a/src/backend/utils/adt/Makefile b/src/backend/utils/adt/Makefile
index 0de0bbb1b8..199eae525d 100644
--- a/src/backend/utils/adt/Makefile
+++ b/src/backend/utils/adt/Makefile
@@ -132,10 +132,9 @@ jsonpath_scan.c: FLEX_NO_BACKUP=yes
 # Force these dependencies to be known even without dependency info built:
 jsonpath_gram.o jsonpath_scan.o: jsonpath_gram.h
 
-# jsonpath_gram.c and jsonpath_scan.c are in the distribution tarball,
-# so they are not cleaned here.
-clean distclean maintainer-clean:
+clean:
 	rm -f lex.backup
+	rm -f jsonpath_gram.c jsonpath_gram.h jsonpath_scan.c
 
 like.o: like.c like_match.c
 
diff --git a/src/backend/utils/mb/Makefile b/src/backend/utils/mb/Makefile
index b19a125fa2..bbde71b5aa 100644
--- a/src/backend/utils/mb/Makefile
+++ b/src/backend/utils/mb/Makefile
@@ -21,5 +21,5 @@ OBJS = \
 
 include $(top_srcdir)/src/backend/common.mk
 
-clean distclean maintainer-clean:
+clean distclean:
 	$(MAKE) -C conversion_procs $@
diff --git a/src/backend/utils/mb/Unicode/Makefile b/src/backend/utils/mb/Unicode/Makefile
index 728ccb99c2..6c0a8150f2 100644
--- a/src/backend/utils/mb/Unicode/Makefile
+++ b/src/backend/utils/mb/Unicode/Makefile
@@ -66,8 +66,6 @@ all: $(MAPS)
 
 distclean: clean
 	rm -f $(TEXTS)
-
-maintainer-clean: distclean
 	rm -f $(MAPS)
 
 
diff --git a/src/backend/utils/mb/conversion_procs/proc.mk b/src/backend/utils/mb/conversion_procs/proc.mk
index e0a3b74b25..2eeae28240 100644
--- a/src/backend/utils/mb/conversion_procs/proc.mk
+++ b/src/backend/utils/mb/conversion_procs/proc.mk
@@ -13,5 +13,5 @@ installdirs: installdirs-lib
 
 uninstall: uninstall-lib
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 	rm -f $(OBJS)
diff --git a/src/backend/utils/misc/Makefile b/src/backend/utils/misc/Makefile
index 2910032930..c2971c7678 100644
--- a/src/backend/utils/misc/Makefile
+++ b/src/backend/utils/misc/Makefile
@@ -40,6 +40,5 @@ endif
 
 include $(top_srcdir)/src/backend/common.mk
 
-# Note: guc-file.c is not deleted by 'make clean',
-# since we want to ship it in distribution tarballs.
 clean:
+	rm -f guc-file.c
diff --git a/src/bin/initdb/Makefile b/src/bin/initdb/Makefile
index d69bd89572..7043289239 100644
--- a/src/bin/initdb/Makefile
+++ b/src/bin/initdb/Makefile
@@ -55,7 +55,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/initdb$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f initdb$(X) $(OBJS) localtime.c
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_amcheck/Makefile b/src/bin/pg_amcheck/Makefile
index 947f2267ed..528c588e35 100644
--- a/src/bin/pg_amcheck/Makefile
+++ b/src/bin/pg_amcheck/Makefile
@@ -40,7 +40,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_amcheck$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_amcheck$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_archivecleanup/Makefile b/src/bin/pg_archivecleanup/Makefile
index 49935d6dce..93fd703f22 100644
--- a/src/bin/pg_archivecleanup/Makefile
+++ b/src/bin/pg_archivecleanup/Makefile
@@ -25,7 +25,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_archivecleanup$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_archivecleanup$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_basebackup/Makefile b/src/bin/pg_basebackup/Makefile
index 893a75c942..74dc1ddd6d 100644
--- a/src/bin/pg_basebackup/Makefile
+++ b/src/bin/pg_basebackup/Makefile
@@ -71,7 +71,7 @@ uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_receivewal$(X)'
 	rm -f '$(DESTDIR)$(bindir)/pg_recvlogical$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_basebackup$(X) pg_receivewal$(X) pg_recvlogical$(X) \
 		$(BBOBJS) pg_receivewal.o pg_recvlogical.o \
 		$(OBJS)
diff --git a/src/bin/pg_checksums/Makefile b/src/bin/pg_checksums/Makefile
index 4911f6bee2..ac736b2260 100644
--- a/src/bin/pg_checksums/Makefile
+++ b/src/bin/pg_checksums/Makefile
@@ -36,7 +36,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_checksums$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_checksums$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_config/Makefile b/src/bin/pg_config/Makefile
index 1a405f9c97..cb13aceafa 100644
--- a/src/bin/pg_config/Makefile
+++ b/src/bin/pg_config/Makefile
@@ -33,7 +33,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_config$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_config$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_controldata/Makefile b/src/bin/pg_controldata/Makefile
index aa5bd58222..00ee1e25b3 100644
--- a/src/bin/pg_controldata/Makefile
+++ b/src/bin/pg_controldata/Makefile
@@ -33,7 +33,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_controldata$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_controldata$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_ctl/Makefile b/src/bin/pg_ctl/Makefile
index 4b6d47a8f8..4d29ca72c1 100644
--- a/src/bin/pg_ctl/Makefile
+++ b/src/bin/pg_ctl/Makefile
@@ -42,7 +42,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_ctl$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_ctl$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_dump/Makefile b/src/bin/pg_dump/Makefile
index 24de7593a6..604cddb997 100644
--- a/src/bin/pg_dump/Makefile
+++ b/src/bin/pg_dump/Makefile
@@ -69,6 +69,6 @@ installcheck:
 uninstall:
 	rm -f $(addprefix '$(DESTDIR)$(bindir)'/, pg_dump$(X) pg_restore$(X) pg_dumpall$(X))
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_dump$(X) pg_restore$(X) pg_dumpall$(X) $(OBJS) pg_dump.o common.o pg_dump_sort.o pg_restore.o pg_dumpall.o
 	rm -rf tmp_check
diff --git a/src/bin/pg_resetwal/Makefile b/src/bin/pg_resetwal/Makefile
index a363b948b5..a06e493ba8 100644
--- a/src/bin/pg_resetwal/Makefile
+++ b/src/bin/pg_resetwal/Makefile
@@ -33,7 +33,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_resetwal$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_resetwal$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_rewind/Makefile b/src/bin/pg_rewind/Makefile
index bed05f1609..8df1da80cb 100644
--- a/src/bin/pg_rewind/Makefile
+++ b/src/bin/pg_rewind/Makefile
@@ -49,7 +49,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_rewind$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_rewind$(X) $(OBJS) xlogreader.c
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_test_fsync/Makefile b/src/bin/pg_test_fsync/Makefile
index 631d0f38a8..4c5e518125 100644
--- a/src/bin/pg_test_fsync/Makefile
+++ b/src/bin/pg_test_fsync/Makefile
@@ -31,6 +31,6 @@ installcheck:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_test_fsync$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_test_fsync$(X) $(OBJS)
 	rm -rf tmp_check
diff --git a/src/bin/pg_test_timing/Makefile b/src/bin/pg_test_timing/Makefile
index 84d84c38aa..7f677edadb 100644
--- a/src/bin/pg_test_timing/Makefile
+++ b/src/bin/pg_test_timing/Makefile
@@ -31,6 +31,6 @@ installcheck:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_test_timing$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_test_timing$(X) $(OBJS)
 	rm -rf tmp_check
diff --git a/src/bin/pg_upgrade/Makefile b/src/bin/pg_upgrade/Makefile
index 5834513add..f76aca1b1a 100644
--- a/src/bin/pg_upgrade/Makefile
+++ b/src/bin/pg_upgrade/Makefile
@@ -46,7 +46,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_upgrade$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_upgrade$(X) $(OBJS)
 	rm -rf delete_old_cluster.sh log/ tmp_check/ \
 	       reindex_hash.sql
diff --git a/src/bin/pg_verifybackup/Makefile b/src/bin/pg_verifybackup/Makefile
index 596df15118..c96323faa9 100644
--- a/src/bin/pg_verifybackup/Makefile
+++ b/src/bin/pg_verifybackup/Makefile
@@ -38,7 +38,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_verifybackup$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_verifybackup$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_waldump/Makefile b/src/bin/pg_waldump/Makefile
index 0ecf582039..4c1ee64950 100644
--- a/src/bin/pg_waldump/Makefile
+++ b/src/bin/pg_waldump/Makefile
@@ -45,7 +45,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_waldump$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_waldump$(X) $(OBJS) $(RMGRDESCSOURCES) xlogreader.c xlogstats.c
 	rm -rf tmp_check
 
diff --git a/src/bin/pgbench/Makefile b/src/bin/pgbench/Makefile
index 68b6eb0376..987bf64df9 100644
--- a/src/bin/pgbench/Makefile
+++ b/src/bin/pgbench/Makefile
@@ -38,8 +38,6 @@ exprparse.c: BISONFLAGS += -d
 # Force these dependencies to be known even without dependency info built:
 exprparse.o exprscan.o: exprparse.h
 
-distprep: exprparse.c exprscan.c
-
 install: all installdirs
 	$(INSTALL_PROGRAM) pgbench$(X) '$(DESTDIR)$(bindir)/pgbench$(X)'
 
@@ -52,8 +50,6 @@ uninstall:
 clean distclean:
 	rm -f pgbench$(X) $(OBJS)
 	rm -rf tmp_check
-
-maintainer-clean: distclean
 	rm -f exprparse.h exprparse.c exprscan.c
 
 check:
diff --git a/src/bin/psql/Makefile b/src/bin/psql/Makefile
index 1f2bf0c6b0..8ad7c65446 100644
--- a/src/bin/psql/Makefile
+++ b/src/bin/psql/Makefile
@@ -62,8 +62,6 @@ psqlscanslash.c: FLEXFLAGS = -Cfe -p -p
 psqlscanslash.c: FLEX_NO_BACKUP=yes
 psqlscanslash.c: FLEX_FIX_WARNING=yes
 
-distprep: sql_help.h sql_help.c psqlscanslash.c
-
 install: all installdirs
 	$(INSTALL_PROGRAM) psql$(X) '$(DESTDIR)$(bindir)/psql$(X)'
 	$(INSTALL_DATA) $(srcdir)/psqlrc.sample '$(DESTDIR)$(datadir)/psqlrc.sample'
@@ -77,10 +75,6 @@ uninstall:
 clean distclean:
 	rm -f psql$(X) $(OBJS) lex.backup
 	rm -rf tmp_check
-
-# files removed here are supposed to be in the distribution tarball,
-# so do not clean them in the clean/distclean rules
-maintainer-clean: distclean
 	rm -f sql_help.h sql_help.c psqlscanslash.c
 
 check:
diff --git a/src/bin/scripts/Makefile b/src/bin/scripts/Makefile
index a7a9d0fea5..20db40b103 100644
--- a/src/bin/scripts/Makefile
+++ b/src/bin/scripts/Makefile
@@ -48,7 +48,7 @@ installdirs:
 uninstall:
 	rm -f $(addprefix '$(DESTDIR)$(bindir)'/, $(addsuffix $(X), $(PROGRAMS)))
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f $(addsuffix $(X), $(PROGRAMS)) $(addsuffix .o, $(PROGRAMS))
 	rm -f common.o $(WIN32RES)
 	rm -rf tmp_check
diff --git a/src/common/Makefile b/src/common/Makefile
index 113029bf7b..ec063c6e18 100644
--- a/src/common/Makefile
+++ b/src/common/Makefile
@@ -121,8 +121,6 @@ GEN_KEYWORDLIST_DEPS = $(TOOLSDIR)/gen_keywordlist.pl $(TOOLSDIR)/PerfectHash.pm
 
 all: libpgcommon.a libpgcommon_shlib.a libpgcommon_srv.a
 
-distprep: kwlist_d.h
-
 # libpgcommon is needed by some contrib
 install: all installdirs
 	$(INSTALL_STLIB) libpgcommon.a '$(DESTDIR)$(libdir)/libpgcommon.a'
@@ -188,10 +186,7 @@ RYU_OBJS = $(RYU_FILES) $(RYU_FILES:%.o=%_shlib.o) $(RYU_FILES:%.o=%_srv.o)
 
 $(RYU_OBJS): CFLAGS += $(PERMIT_DECLARATION_AFTER_STATEMENT)
 
-# kwlist_d.h is in the distribution tarball, so it is not cleaned here.
 clean distclean:
 	rm -f libpgcommon.a libpgcommon_shlib.a libpgcommon_srv.a
 	rm -f $(OBJS_FRONTEND) $(OBJS_SHLIB) $(OBJS_SRV)
-
-maintainer-clean: distclean
 	rm -f kwlist_d.h
diff --git a/src/common/unicode/Makefile b/src/common/unicode/Makefile
index 382da476cf..d6e427b582 100644
--- a/src/common/unicode/Makefile
+++ b/src/common/unicode/Makefile
@@ -68,5 +68,3 @@ clean:
 
 distclean: clean
 	rm -f UnicodeData.txt EastAsianWidth.txt CompositionExclusions.txt NormalizationTest.txt norm_test_table.h unicode_norm_table.h
-
-maintainer-clean: distclean
diff --git a/src/fe_utils/Makefile b/src/fe_utils/Makefile
index 456d6dd390..8accd5906d 100644
--- a/src/fe_utils/Makefile
+++ b/src/fe_utils/Makefile
@@ -48,8 +48,6 @@ psqlscan.c: FLEXFLAGS = -Cfe -p -p
 psqlscan.c: FLEX_NO_BACKUP=yes
 psqlscan.c: FLEX_FIX_WARNING=yes
 
-distprep: psqlscan.c
-
 # libpgfeutils could be useful to contrib, so install it
 install: all installdirs
 	$(INSTALL_STLIB) libpgfeutils.a '$(DESTDIR)$(libdir)/libpgfeutils.a'
@@ -62,8 +60,4 @@ uninstall:
 
 clean distclean:
 	rm -f libpgfeutils.a $(OBJS) lex.backup
-
-# psqlscan.c is supposed to be in the distribution tarball,
-# so do not clean it in the clean/distclean rules
-maintainer-clean: distclean
 	rm -f psqlscan.c
diff --git a/src/include/Makefile b/src/include/Makefile
index 2d5242561c..743de5abe4 100644
--- a/src/include/Makefile
+++ b/src/include/Makefile
@@ -78,5 +78,5 @@ clean:
 	rm -f catalog/pg_*_d.h catalog/header-stamp
 	rm -f nodes/nodetags.h nodes/header-stamp
 
-distclean maintainer-clean: clean
+distclean: clean
 	rm -f pg_config.h pg_config_ext.h pg_config_os.h stamp-h stamp-ext-h
diff --git a/src/interfaces/ecpg/Makefile b/src/interfaces/ecpg/Makefile
index e4bbf7b8a8..3002bc3c1b 100644
--- a/src/interfaces/ecpg/Makefile
+++ b/src/interfaces/ecpg/Makefile
@@ -23,7 +23,7 @@ install-pgtypeslib-recurse install-ecpglib-recurse install-compatlib-recurse ins
 install-compatlib-recurse: install-ecpglib-recurse
 install-ecpglib-recurse: install-pgtypeslib-recurse
 
-clean distclean maintainer-clean:
+clean distclean:
 	$(MAKE) -C test clean
 
 checktcp: | temp-install
diff --git a/src/interfaces/ecpg/compatlib/Makefile b/src/interfaces/ecpg/compatlib/Makefile
index b9483fba08..695fd1a080 100644
--- a/src/interfaces/ecpg/compatlib/Makefile
+++ b/src/interfaces/ecpg/compatlib/Makefile
@@ -55,5 +55,3 @@ uninstall: uninstall-lib
 
 clean distclean: clean-lib
 	rm -f $(OBJS)
-
-maintainer-clean: distclean
diff --git a/src/interfaces/ecpg/ecpglib/Makefile b/src/interfaces/ecpg/ecpglib/Makefile
index 652e023405..103cce393a 100644
--- a/src/interfaces/ecpg/ecpglib/Makefile
+++ b/src/interfaces/ecpg/ecpglib/Makefile
@@ -66,5 +66,3 @@ uninstall: uninstall-lib
 
 clean distclean: clean-lib
 	rm -f $(OBJS)
-
-maintainer-clean: distclean
diff --git a/src/interfaces/ecpg/include/Makefile b/src/interfaces/ecpg/include/Makefile
index 9c68bf3c47..3476409cef 100644
--- a/src/interfaces/ecpg/include/Makefile
+++ b/src/interfaces/ecpg/include/Makefile
@@ -31,5 +31,5 @@ uninstall:
 	rm -f $(addprefix '$(DESTDIR)$(informix_esql_dir)'/, $(informix_headers))
 	rm -f '$(DESTDIR)$(includedir)'/$(notdir $(ecpg_config_h))
 
-distclean maintainer-clean:
+distclean:
 	rm -f ecpg_config.h stamp-h
diff --git a/src/interfaces/ecpg/pgtypeslib/Makefile b/src/interfaces/ecpg/pgtypeslib/Makefile
index b0e154eb15..e56700a12e 100644
--- a/src/interfaces/ecpg/pgtypeslib/Makefile
+++ b/src/interfaces/ecpg/pgtypeslib/Makefile
@@ -50,5 +50,3 @@ uninstall: uninstall-lib
 
 clean distclean: clean-lib
 	rm -f $(OBJS)
-
-maintainer-clean: distclean
diff --git a/src/interfaces/ecpg/preproc/Makefile b/src/interfaces/ecpg/preproc/Makefile
index 77ae9ab722..afd46cd17c 100644
--- a/src/interfaces/ecpg/preproc/Makefile
+++ b/src/interfaces/ecpg/preproc/Makefile
@@ -81,8 +81,6 @@ ecpg_keywords.o: ecpg_kwlist_d.h
 c_keywords.o: c_kwlist_d.h
 keywords.o: $(top_srcdir)/src/include/parser/kwlist.h
 
-distprep: preproc.y preproc.c preproc.h pgc.c c_kwlist_d.h ecpg_kwlist_d.h
-
 install: all installdirs
 	$(INSTALL_PROGRAM) ecpg$(X) '$(DESTDIR)$(bindir)'
 
@@ -92,11 +90,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/ecpg$(X)'
 
-# preproc.y, preproc.c, preproc.h, pgc.c, c_kwlist_d.h, and ecpg_kwlist_d.h
-# are in the distribution tarball, so they are not cleaned here.
 clean distclean:
 	rm -f *.o ecpg$(X)
 	rm -f typename.c
-
-maintainer-clean: distclean
 	rm -f preproc.y preproc.c preproc.h pgc.c c_kwlist_d.h ecpg_kwlist_d.h
diff --git a/src/interfaces/ecpg/test/Makefile b/src/interfaces/ecpg/test/Makefile
index cf841a3a5b..3769488f16 100644
--- a/src/interfaces/ecpg/test/Makefile
+++ b/src/interfaces/ecpg/test/Makefile
@@ -20,7 +20,7 @@ else
 abs_builddir := $(shell sh -c "pwd -W")
 endif
 
-all install installdirs uninstall distprep:
+all install installdirs uninstall:
 	$(MAKE) -C connect $@
 	$(MAKE) -C sql $@
 	$(MAKE) -C pgtypeslib $@
@@ -29,7 +29,7 @@ all install installdirs uninstall distprep:
 	$(MAKE) -C compat_oracle $@
 	$(MAKE) -C thread $@
 
-clean distclean maintainer-clean:
+clean distclean:
 	$(MAKE) -C connect $@
 	$(MAKE) -C sql $@
 	$(MAKE) -C pgtypeslib $@
diff --git a/src/interfaces/libpq/Makefile b/src/interfaces/libpq/Makefile
index 46653682b0..d0a66cfaa0 100644
--- a/src/interfaces/libpq/Makefile
+++ b/src/interfaces/libpq/Makefile
@@ -165,6 +165,3 @@ clean distclean: clean-lib
 	rm -f $(OBJS) pthread.h libpq-refs-stamp
 # Might be left over from a Win32 client-only build
 	rm -f pg_config_paths.h
-
-maintainer-clean: distclean
-	$(MAKE) -C test $@
diff --git a/src/interfaces/libpq/test/Makefile b/src/interfaces/libpq/test/Makefile
index 75ac08f943..4e17ec1514 100644
--- a/src/interfaces/libpq/test/Makefile
+++ b/src/interfaces/libpq/test/Makefile
@@ -20,5 +20,5 @@ all: $(PROGS)
 
 $(PROGS): $(WIN32RES)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f $(PROGS) *.o
diff --git a/src/makefiles/pgxs.mk b/src/makefiles/pgxs.mk
index 7ba8d5bc98..0de3737e78 100644
--- a/src/makefiles/pgxs.mk
+++ b/src/makefiles/pgxs.mk
@@ -391,7 +391,7 @@ ifdef MODULE_big
 clean: clean-lib
 endif
 
-distclean maintainer-clean: clean
+distclean: clean
 
 
 ifdef REGRESS
diff --git a/src/nls-global.mk b/src/nls-global.mk
index f21bd5ed55..dfff472cb3 100644
--- a/src/nls-global.mk
+++ b/src/nls-global.mk
@@ -171,7 +171,7 @@ all: all-po
 install: install-po
 installdirs: installdirs-po
 uninstall: uninstall-po
-clean distclean maintainer-clean: clean-po
+clean distclean: clean-po
 
 .PHONY: all-po install-po installdirs-po uninstall-po clean-po \
         init-po update-po
diff --git a/src/pl/plperl/GNUmakefile b/src/pl/plperl/GNUmakefile
index 51f8890d15..975f540b3e 100644
--- a/src/pl/plperl/GNUmakefile
+++ b/src/pl/plperl/GNUmakefile
@@ -127,7 +127,7 @@ installcheck: submake
 submake:
 	$(MAKE) -C $(top_builddir)/src/test/regress pg_regress$(X)
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 	rm -f SPI.c Util.c $(OBJS) perlchunks.h plperl_opmask.h
 	rm -rf $(pg_regress_clean_files)
 ifeq ($(PORTNAME), win32)
diff --git a/src/pl/plpgsql/src/Makefile b/src/pl/plpgsql/src/Makefile
index f7eb42d54f..dfb815212f 100644
--- a/src/pl/plpgsql/src/Makefile
+++ b/src/pl/plpgsql/src/Makefile
@@ -104,14 +104,7 @@ submake:
 	$(MAKE) -C $(top_builddir)/src/test/regress pg_regress$(X)
 
 
-distprep: pl_gram.h pl_gram.c plerrcodes.h pl_reserved_kwlist_d.h pl_unreserved_kwlist_d.h
-
-# pl_gram.c, pl_gram.h, plerrcodes.h, pl_reserved_kwlist_d.h, and
-# pl_unreserved_kwlist_d.h are in the distribution tarball, so they
-# are not cleaned here.
 clean distclean: clean-lib
 	rm -f $(OBJS)
 	rm -rf $(pg_regress_clean_files)
-
-maintainer-clean: distclean
 	rm -f pl_gram.c pl_gram.h plerrcodes.h pl_reserved_kwlist_d.h pl_unreserved_kwlist_d.h
diff --git a/src/pl/plpython/Makefile b/src/pl/plpython/Makefile
index 6b1865c240..ef0a5905ae 100644
--- a/src/pl/plpython/Makefile
+++ b/src/pl/plpython/Makefile
@@ -142,6 +142,7 @@ clean distclean: clean-lib
 ifeq ($(PORTNAME), win32)
 	rm -f python${pytverstr}.def
 endif
+	rm -f spiexceptions.h
 
 
 # Force this dependency to be known even without dependency info built:
@@ -149,8 +150,3 @@ plpy_plpymodule.o: spiexceptions.h
 
 spiexceptions.h: $(top_srcdir)/src/backend/utils/errcodes.txt generate-spiexceptions.pl
 	$(PERL) $(srcdir)/generate-spiexceptions.pl $< > $@
-
-distprep: spiexceptions.h
-
-maintainer-clean: distclean
-	rm -f spiexceptions.h
diff --git a/src/pl/tcl/Makefile b/src/pl/tcl/Makefile
index 314f9b2eec..ea52a2efc2 100644
--- a/src/pl/tcl/Makefile
+++ b/src/pl/tcl/Makefile
@@ -63,8 +63,6 @@ pltcl.o: pltclerrcodes.h
 pltclerrcodes.h: $(top_srcdir)/src/backend/utils/errcodes.txt generate-pltclerrcodes.pl
 	$(PERL) $(srcdir)/generate-pltclerrcodes.pl $< > $@
 
-distprep: pltclerrcodes.h
-
 install: all install-lib install-data
 
 installdirs: installdirs-lib
@@ -91,13 +89,10 @@ installcheck: submake
 submake:
 	$(MAKE) -C $(top_builddir)/src/test/regress pg_regress$(X)
 
-# pltclerrcodes.h is in the distribution tarball, so don't clean it here.
 clean distclean: clean-lib
 	rm -f $(OBJS)
 	rm -rf $(pg_regress_clean_files)
 ifeq ($(PORTNAME), win32)
 	rm -f $(tclwithver).def
 endif
-
-maintainer-clean: distclean
 	rm -f pltclerrcodes.h
diff --git a/src/port/Makefile b/src/port/Makefile
index f205c2c9c5..4320dee0d1 100644
--- a/src/port/Makefile
+++ b/src/port/Makefile
@@ -154,6 +154,6 @@ pg_config_paths.h: $(top_builddir)/src/Makefile.global
 	echo "#define HTMLDIR \"$(htmldir)\"" >>$@
 	echo "#define MANDIR \"$(mandir)\"" >>$@
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f libpgport.a libpgport_shlib.a libpgport_srv.a
 	rm -f $(OBJS) $(OBJS_SHLIB) $(OBJS_SRV) pg_config_paths.h
diff --git a/src/test/authentication/Makefile b/src/test/authentication/Makefile
index 46fa72052d..a48ce39aaf 100644
--- a/src/test/authentication/Makefile
+++ b/src/test/authentication/Makefile
@@ -19,5 +19,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/test/examples/Makefile b/src/test/examples/Makefile
index a67f456904..e72d058e0c 100644
--- a/src/test/examples/Makefile
+++ b/src/test/examples/Makefile
@@ -18,5 +18,5 @@ PROGS = testlibpq testlibpq2 testlibpq3 testlibpq4 testlo testlo64
 
 all: $(PROGS)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f $(PROGS) *.o
diff --git a/src/test/icu/Makefile b/src/test/icu/Makefile
index 033b0d03cc..c4fc8cdb8c 100644
--- a/src/test/icu/Makefile
+++ b/src/test/icu/Makefile
@@ -21,5 +21,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/test/isolation/Makefile b/src/test/isolation/Makefile
index b8738b7c1b..8f5192fb37 100644
--- a/src/test/isolation/Makefile
+++ b/src/test/isolation/Makefile
@@ -43,8 +43,6 @@ pg_isolation_regress$(X): isolation_main.o pg_regress.o $(WIN32RES)
 isolationtester$(X): $(OBJS) | submake-libpq submake-libpgport
 	$(CC) $(CFLAGS) $^ $(libpq_pgport) $(LDFLAGS) $(LDFLAGS_EX) $(LIBS) -o $@
 
-distprep: specparse.c specscanner.c
-
 # See notes in src/backend/parser/Makefile about the following two rules
 specparse.h: specparse.c
 	touch $@
@@ -60,8 +58,6 @@ clean distclean:
 	rm -f isolationtester$(X) pg_isolation_regress$(X) $(OBJS) isolation_main.o
 	rm -f pg_regress.o
 	rm -rf $(pg_regress_clean_files)
-
-maintainer-clean: distclean
 	rm -f specparse.h specparse.c specscanner.c
 
 installcheck: all
diff --git a/src/test/kerberos/Makefile b/src/test/kerberos/Makefile
index f460d2c0e7..44da65611e 100644
--- a/src/test/kerberos/Makefile
+++ b/src/test/kerberos/Makefile
@@ -24,5 +24,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/test/ldap/Makefile b/src/test/ldap/Makefile
index 73bc878ea8..d4305ed5eb 100644
--- a/src/test/ldap/Makefile
+++ b/src/test/ldap/Makefile
@@ -21,5 +21,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/test/locale/Makefile b/src/test/locale/Makefile
index 7ba096b542..a40c67af07 100644
--- a/src/test/locale/Makefile
+++ b/src/test/locale/Makefile
@@ -10,7 +10,7 @@ DIRS = de_DE.ISO8859-1 gr_GR.ISO8859-7 koi8-r koi8-to-win1251
 
 all: $(PROGS)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f $(PROGS) *.o
 	rm -rf tmp_check
 	for d in $(DIRS); do \
diff --git a/src/test/recovery/Makefile b/src/test/recovery/Makefile
index c60314d195..49f1d1c118 100644
--- a/src/test/recovery/Makefile
+++ b/src/test/recovery/Makefile
@@ -25,5 +25,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/test/regress/GNUmakefile b/src/test/regress/GNUmakefile
index 38c3a1f85b..388f2700bd 100644
--- a/src/test/regress/GNUmakefile
+++ b/src/test/regress/GNUmakefile
@@ -146,7 +146,7 @@ bigcheck: all | temp-install
 ## Clean up
 ##
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 # things built by `all' target
 	rm -f $(OBJS) refint$(DLSUFFIX) autoinc$(DLSUFFIX)
 	rm -f pg_regress_main.o pg_regress.o pg_regress$(X)
diff --git a/src/test/ssl/Makefile b/src/test/ssl/Makefile
index af1e06e949..2d7c69068f 100644
--- a/src/test/ssl/Makefile
+++ b/src/test/ssl/Makefile
@@ -23,7 +23,7 @@ export OPENSSL with_ssl
 sslfiles sslfiles-clean:
 	$(MAKE) -f $(srcdir)/sslfiles.mk $@
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
 	$(MAKE) -f $(srcdir)/sslfiles.mk $@
 
diff --git a/src/test/ssl/sslfiles.mk b/src/test/ssl/sslfiles.mk
index f7ababe42c..62b2272183 100644
--- a/src/test/ssl/sslfiles.mk
+++ b/src/test/ssl/sslfiles.mk
@@ -269,6 +269,6 @@ sslfiles-clean:
 # clean targets will be run during a "standard" recursive clean run from the
 # main build tree. The sslfiles-clean target must be run explicitly from this
 # directory.
-.PHONY: clean distclean maintainer-clean
-clean distclean maintainer-clean:
+.PHONY: clean distclean
+clean distclean:
 	rm -rf ssl/*.old ssl/new_certs_dir ssl/client*_tmp.key
diff --git a/src/test/subscription/Makefile b/src/test/subscription/Makefile
index 99d1fe012d..36475ffabc 100644
--- a/src/test/subscription/Makefile
+++ b/src/test/subscription/Makefile
@@ -23,5 +23,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/timezone/Makefile b/src/timezone/Makefile
index fbbaae4cc5..c85e831247 100644
--- a/src/timezone/Makefile
+++ b/src/timezone/Makefile
@@ -75,5 +75,5 @@ ifeq (,$(with_system_tzdata))
 endif
 	$(MAKE) -C tznames $@
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f zic$(X) $(ZICOBJS) abbrevs.txt
diff --git a/src/tools/ifaddrs/Makefile b/src/tools/ifaddrs/Makefile
index e74d754769..ef5e8f0e0e 100644
--- a/src/tools/ifaddrs/Makefile
+++ b/src/tools/ifaddrs/Makefile
@@ -24,5 +24,5 @@ all: test_ifaddrs
 test_ifaddrs: test_ifaddrs.o $(libpq_backend_dir)/ifaddr.o
 	$(CC) $(CFLAGS) test_ifaddrs.o $(libpq_backend_dir)/ifaddr.o $(LDFLAGS) $(LDFLAGS_EX) $(LIBS) -o $@$(X)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f test_ifaddrs$(X) $(OBJS)
diff --git a/src/tools/pg_bsd_indent/Makefile b/src/tools/pg_bsd_indent/Makefile
index d176ceb326..ce5d815f07 100644
--- a/src/tools/pg_bsd_indent/Makefile
+++ b/src/tools/pg_bsd_indent/Makefile
@@ -39,7 +39,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_bsd_indent$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_bsd_indent$(X) $(OBJS)
 	rm -rf log/ tmp_check/
 
-- 
2.41.0

From 9b4504ce0e247b840b8cef424e44d922bc7cde88 Mon Sep 17 00:00:00 2001
From: Peter Eisentraut <peter@eisentraut.org>
Date: Thu, 5 Oct 2023 17:39:24 +0200
Subject: [PATCH v5 1/2] Make bison, flex, perl hard build requirements

... see next patch
---
 config/perl.m4                 |  9 +---
 config/programs.m4             | 21 ++-------
 configure                      | 62 ++++----------------------
 doc/src/sgml/installation.sgml | 80 +++++++++++++++-------------------
 doc/src/sgml/sourcerepo.sgml   | 10 -----
 src/Makefile.global.in         | 16 +------
 6 files changed, 52 insertions(+), 146 deletions(-)

diff --git a/config/perl.m4 b/config/perl.m4
index 8126e79f67..1a3bb55649 100644
--- a/config/perl.m4
+++ b/config/perl.m4
@@ -13,19 +13,14 @@ if test "$PERL"; then
   if echo "$pgac_perl_version" | sed ['s/[.a-z_]/ /g'] | \
     $AWK '{ if ([$]1 == 5 && ([$]2 >= 14)) exit 1; else exit 0;}'
   then
-    AC_MSG_WARN([
+    AC_MSG_ERROR([
 *** The installed version of Perl, $PERL, is too old to use with PostgreSQL.
 *** Perl version 5.14 or later is required, but this is $pgac_perl_version.])
-    PERL=""
   fi
 fi
 
 if test -z "$PERL"; then
-  AC_MSG_WARN([
-*** Without Perl you will not be able to build PostgreSQL from Git.
-*** You can obtain Perl from any CPAN mirror site.
-*** (If you are using the official distribution of PostgreSQL then you do not
-*** need to worry about this, because the Perl output is pre-generated.)])
+  AC_MSG_ERROR([Perl not found])
 fi
 ])# PGAC_PATH_PERL
 
diff --git a/config/programs.m4 b/config/programs.m4
index 8a118b4e03..490ec9fe9f 100644
--- a/config/programs.m4
+++ b/config/programs.m4
@@ -33,10 +33,9 @@ if test "$BISON"; then
   AC_MSG_NOTICE([using $pgac_bison_version])
   if echo "$pgac_bison_version" | $AWK '{ if ([$]4 < 2.3) exit 0; else exit 1;}'
   then
-    AC_MSG_WARN([
+    AC_MSG_ERROR([
 *** The installed version of Bison, $BISON, is too old to use with PostgreSQL.
 *** Bison version 2.3 or later is required, but this is $pgac_bison_version.])
-    BISON=""
   fi
   # Bison >=3.0 issues warnings about %name-prefix="base_yy", instead
   # of the now preferred %name-prefix "base_yy", but the latter
@@ -49,12 +48,7 @@ if test "$BISON"; then
 fi
 
 if test -z "$BISON"; then
-  AC_MSG_WARN([
-*** Without Bison you will not be able to build PostgreSQL from Git nor
-*** change any of the parser definition files.  You can obtain Bison from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this, because the Bison
-*** output is pre-generated.)])
+  AC_MSG_ERROR([bison not found])
 fi
 dnl We don't need AC_SUBST(BISON) because PGAC_PATH_PROGS did it
 AC_SUBST(BISONFLAGS)
@@ -95,7 +89,7 @@ else
             pgac_cv_path_flex=$pgac_candidate
             break 2
           else
-            AC_MSG_WARN([
+            AC_MSG_ERROR([
 *** The installed version of Flex, $pgac_candidate, is too old to use with PostgreSQL.
 *** Flex version 2.5.35 or later is required, but this is $pgac_flex_version.])
           fi
@@ -109,14 +103,7 @@ fi
 ])[]dnl AC_CACHE_CHECK
 
 if test x"$pgac_cv_path_flex" = x"no"; then
-  AC_MSG_WARN([
-*** Without Flex you will not be able to build PostgreSQL from Git nor
-*** change any of the scanner definition files.  You can obtain Flex from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this because the Flex
-*** output is pre-generated.)])
-
-  FLEX=
+  AC_MSG_ERROR([flex not found])
 else
   FLEX=$pgac_cv_path_flex
   pgac_flex_version=`$FLEX --version 2>/dev/null`
diff --git a/configure b/configure
index d47e0f8b26..514cee190d 100755
--- a/configure
+++ b/configure
@@ -10160,13 +10160,9 @@ if test "$BISON"; then
 $as_echo "$as_me: using $pgac_bison_version" >&6;}
   if echo "$pgac_bison_version" | $AWK '{ if ($4 < 2.3) exit 0; else exit 1;}'
   then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** The installed version of Bison, $BISON, is too old to use with PostgreSQL.
-*** Bison version 2.3 or later is required, but this is $pgac_bison_version." >&5
-$as_echo "$as_me: WARNING:
+    as_fn_error $? "
 *** The installed version of Bison, $BISON, is too old to use with PostgreSQL.
-*** Bison version 2.3 or later is required, but this is $pgac_bison_version." >&2;}
-    BISON=""
+*** Bison version 2.3 or later is required, but this is $pgac_bison_version." "$LINENO" 5
   fi
   # Bison >=3.0 issues warnings about %name-prefix="base_yy", instead
   # of the now preferred %name-prefix "base_yy", but the latter
@@ -10179,18 +10175,7 @@ $as_echo "$as_me: WARNING:
 fi
 
 if test -z "$BISON"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** Without Bison you will not be able to build PostgreSQL from Git nor
-*** change any of the parser definition files.  You can obtain Bison from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this, because the Bison
-*** output is pre-generated.)" >&5
-$as_echo "$as_me: WARNING:
-*** Without Bison you will not be able to build PostgreSQL from Git nor
-*** change any of the parser definition files.  You can obtain Bison from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this, because the Bison
-*** output is pre-generated.)" >&2;}
+  as_fn_error $? "bison not found" "$LINENO" 5
 fi
 
 
@@ -10223,12 +10208,9 @@ else
             pgac_cv_path_flex=$pgac_candidate
             break 2
           else
-            { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** The installed version of Flex, $pgac_candidate, is too old to use with PostgreSQL.
-*** Flex version 2.5.35 or later is required, but this is $pgac_flex_version." >&5
-$as_echo "$as_me: WARNING:
+            as_fn_error $? "
 *** The installed version of Flex, $pgac_candidate, is too old to use with PostgreSQL.
-*** Flex version 2.5.35 or later is required, but this is $pgac_flex_version." >&2;}
+*** Flex version 2.5.35 or later is required, but this is $pgac_flex_version." "$LINENO" 5
           fi
         fi
       fi
@@ -10242,20 +10224,7 @@ fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv_path_flex" >&5
 $as_echo "$pgac_cv_path_flex" >&6; }
 if test x"$pgac_cv_path_flex" = x"no"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** Without Flex you will not be able to build PostgreSQL from Git nor
-*** change any of the scanner definition files.  You can obtain Flex from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this because the Flex
-*** output is pre-generated.)" >&5
-$as_echo "$as_me: WARNING:
-*** Without Flex you will not be able to build PostgreSQL from Git nor
-*** change any of the scanner definition files.  You can obtain Flex from
-*** a GNU mirror site.  (If you are using the official distribution of
-*** PostgreSQL then you do not need to worry about this because the Flex
-*** output is pre-generated.)" >&2;}
-
-  FLEX=
+  as_fn_error $? "flex not found" "$LINENO" 5
 else
   FLEX=$pgac_cv_path_flex
   pgac_flex_version=`$FLEX --version 2>/dev/null`
@@ -10329,27 +10298,14 @@ $as_echo "$as_me: using perl $pgac_perl_version" >&6;}
   if echo "$pgac_perl_version" | sed 's/[.a-z_]/ /g' | \
     $AWK '{ if ($1 == 5 && ($2 >= 14)) exit 1; else exit 0;}'
   then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** The installed version of Perl, $PERL, is too old to use with PostgreSQL.
-*** Perl version 5.14 or later is required, but this is $pgac_perl_version." >&5
-$as_echo "$as_me: WARNING:
+    as_fn_error $? "
 *** The installed version of Perl, $PERL, is too old to use with PostgreSQL.
-*** Perl version 5.14 or later is required, but this is $pgac_perl_version." >&2;}
-    PERL=""
+*** Perl version 5.14 or later is required, but this is $pgac_perl_version." "$LINENO" 5
   fi
 fi
 
 if test -z "$PERL"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** Without Perl you will not be able to build PostgreSQL from Git.
-*** You can obtain Perl from any CPAN mirror site.
-*** (If you are using the official distribution of PostgreSQL then you do not
-*** need to worry about this, because the Perl output is pre-generated.)" >&5
-$as_echo "$as_me: WARNING:
-*** Without Perl you will not be able to build PostgreSQL from Git.
-*** You can obtain Perl from any CPAN mirror site.
-*** (If you are using the official distribution of PostgreSQL then you do not
-*** need to worry about this, because the Perl output is pre-generated.)" >&2;}
+  as_fn_error $? "Perl not found" "$LINENO" 5
 fi
 
 if test "$with_perl" = yes; then
diff --git a/doc/src/sgml/installation.sgml b/doc/src/sgml/installation.sgml
index f4b1f81189..468759583c 100644
--- a/doc/src/sgml/installation.sgml
+++ b/doc/src/sgml/installation.sgml
@@ -102,6 +102,41 @@ <title>Requirements</title>
      </para>
     </listitem>
 
+    <listitem>
+     <para>
+      <indexterm>
+       <primary>flex</primary>
+      </indexterm>
+      <indexterm>
+       <primary>lex</primary>
+      </indexterm>
+      <indexterm>
+       <primary>bison</primary>
+      </indexterm>
+      <indexterm>
+       <primary>yacc</primary>
+      </indexterm>
+
+      <application>Flex</application> 2.5.35 or later and
+      <application>Bison</application> 2.3 or later are required.  Other
+      <application>lex</application> and <application>yacc</application>
+      programs cannot be used.
+     </para>
+    </listitem>
+
+    <listitem>
+     <para>
+      <indexterm>
+       <primary>perl</primary>
+      </indexterm>
+
+      <application>Perl</application> 5.14 or later is needed during the build
+      process and to run some test suites.  (This requirement is separate from
+      the requirements for building <application>PL/Perl</application>; see
+      below.)
+     </para>
+    </listitem>
+
     <listitem>
      <para>
       <indexterm>
@@ -315,51 +350,6 @@ <title>Requirements</title>
    </itemizedlist>
   </para>
 
-  <para>
-   If you are building from a <productname>Git</productname> tree instead of
-   using a released source package, or if you want to do server development,
-   you also need the following packages:
-
-   <itemizedlist>
-    <listitem>
-     <para>
-      <indexterm>
-       <primary>flex</primary>
-      </indexterm>
-      <indexterm>
-       <primary>lex</primary>
-      </indexterm>
-      <indexterm>
-       <primary>bison</primary>
-      </indexterm>
-      <indexterm>
-       <primary>yacc</primary>
-      </indexterm>
-
-      <application>Flex</application> and <application>Bison</application>
-      are needed to build from a Git checkout, or if you changed the actual
-      scanner and parser definition files. If you need them, be sure
-      to get <application>Flex</application> 2.5.35 or later and
-      <application>Bison</application> 2.3 or later. Other <application>lex</application>
-      and <application>yacc</application> programs cannot be used.
-     </para>
-    </listitem>
-    <listitem>
-     <para>
-      <indexterm>
-       <primary>perl</primary>
-      </indexterm>
-
-      <application>Perl</application> 5.14 or later is needed to build from a Git checkout,
-      or if you changed the input files for any of the build steps that
-      use Perl scripts.  If building on Windows you will need
-      <application>Perl</application> in any case.  <application>Perl</application> is
-      also required to run some test suites.
-     </para>
-    </listitem>
-   </itemizedlist>
-  </para>
-
   <para>
    If you need to get a <acronym>GNU</acronym> package, you can find
    it at your local <acronym>GNU</acronym> mirror site (see <ulink
diff --git a/doc/src/sgml/sourcerepo.sgml b/doc/src/sgml/sourcerepo.sgml
index 07b003a794..6c13c5a30c 100644
--- a/doc/src/sgml/sourcerepo.sgml
+++ b/doc/src/sgml/sourcerepo.sgml
@@ -16,16 +16,6 @@ <title>The Source Code Repository</title>
   has some discussion on working with Git.
  </para>
 
-  <para>
-   Note that building <productname>PostgreSQL</productname> from the source
-   repository requires reasonably up-to-date versions of <application>bison</application>,
-   <application>flex</application>, and <application>Perl</application>.
-   These tools are not needed to build from a distribution tarball, because
-   the files generated with these tools are included in the tarball.
-   Other tool requirements
-   are the same as shown in <xref linkend="install-requirements"/>.
-  </para>
-
  <sect1 id="git">
   <title>Getting the Source via <productname>Git</productname></title>
 
diff --git a/src/Makefile.global.in b/src/Makefile.global.in
index 7b66590801..985b3ea62b 100644
--- a/src/Makefile.global.in
+++ b/src/Makefile.global.in
@@ -319,12 +319,8 @@ X = @EXEEXT@
 
 # Perl
 
-ifneq (@PERL@,)
-    # quoted to protect pathname with spaces
-    PERL		= '@PERL@'
-else
-    PERL		= $(missing) perl
-endif
+# quoted to protect pathname with spaces
+PERL		= '@PERL@'
 perl_archlibexp		= @perl_archlibexp@
 perl_privlibexp		= @perl_privlibexp@
 perl_includespec	= @perl_includespec@
@@ -777,21 +773,13 @@ TAS         = @TAS@
 # Global targets and rules
 
 %.c: %.l
-ifdef FLEX
 	$(FLEX) $(if $(FLEX_NO_BACKUP),-b) $(FLEXFLAGS) -o'$@' $<
 	@$(if $(FLEX_NO_BACKUP),if [ `wc -l <lex.backup` -eq 1 ]; then rm lex.backup; else echo "Scanner requires backup; see lex.backup." 1>&2; exit 1; fi)
 	$(if $(FLEX_FIX_WARNING),$(PERL) $(top_srcdir)/src/tools/fix-old-flex-code.pl '$@')
-else
-	@$(missing) flex $< '$@'
-endif
 
 %.c: %.y
 	$(if $(BISON_CHECK_CMD),$(BISON_CHECK_CMD))
-ifdef BISON
 	$(BISON) $(BISONFLAGS) -o $@ $<
-else
-	@$(missing) bison $< $@
-endif
 
 %.i: %.c
 	$(CPP) $(CPPFLAGS) -o $@ $<
-- 
2.42.0

From 42b5812cacb97746aec2f7c7a54dafba10437e24 Mon Sep 17 00:00:00 2001
From: Peter Eisentraut <peter@eisentraut.org>
Date: Wed, 23 Aug 2023 12:15:42 +0200
Subject: [PATCH v5 2/2] Remove distprep

A PostgreSQL release tarball contains a number of prebuilt files, in
particular files produced by bison, flex, perl, and well as html and
man documentation.  We have done this consistent with established
practice at the time to not require these tools for building from a
tarball.  Some of these tools were hard to get, or get the right
version of, from time to time, and shipping the prebuilt output was a
convenience to users.

Now this has at least two problems:

One, we have to make the build system(s) work in two modes: Building
from a git checkout and building from a tarball.  This is pretty
complicated, but it works so far for autoconf/make.  It does not
currently work for meson; you can currently only build with meson from
a git checkout.  Making meson builds work from a tarball seems very
difficult or impossible.  One particular problem is that since meson
requires a separate build directory, we cannot make the build update
files like gram.h in the source tree.  So if you were to build from a
tarball and update gram.y, you will have a gram.h in the source tree
and one in the build tree, but the way things work is that the
compiler will always use the one in the source tree.  So you cannot,
for example, make any gram.y changes when building from a tarball.
This seems impossible to fix in a non-horrible way.

Second, there is increased interest nowadays in precisely tracking the
origin of software.  We can reasonably track contributions into the
git tree, and users can reasonably track the path from a tarball to
packages and downloads and installs.  But what happens between the git
tree and the tarball is obscure and in some cases non-reproducible.

The solution for both of these issues is to get rid of the step that
adds prebuilt files to the tarball.  The tarball now only contains
what is in the git tree (*).  Getting the additional build
dependencies is no longer a problem nowadays, and the complications to
keep these dual build modes working are significant.  And of course we
want to get the meson build system working universally.

This commit removes the make distprep target altogether.  The make
dist target continues to do its job, it just doesn't call distprep
anymore.

(*) - The tarball also contains the INSTALL file that is built at make
dist time, but not by distprep.  This is unchanged for now.

The make maintainer-clean target, whose job it is to remove the
prebuilt files in addition to what make distclean does, is now just an
alias to make distprep.  (In practice, it is probably obsolete given
that git clean is available.)

The following programs are now hard build requirements in configure
(they were already required by meson.build):

- bison
- flex
- perl
---
 GNUmakefile.in                                |  6 +-
 contrib/cube/Makefile                         |  7 +--
 contrib/fuzzystrmatch/Makefile                |  9 +--
 contrib/seg/Makefile                          |  7 +--
 doc/Makefile                                  |  2 +-
 doc/src/Makefile                              |  2 +-
 doc/src/sgml/Makefile                         | 16 ++---
 doc/src/sgml/installation.sgml                |  3 +-
 meson.build                                   |  2 +-
 src/Makefile                                  |  5 +-
 src/Makefile.global.in                        | 14 +++--
 src/backend/Makefile                          | 62 ++++---------------
 src/backend/bootstrap/Makefile                |  6 +-
 src/backend/catalog/Makefile                  | 14 +----
 src/backend/jit/llvm/Makefile                 |  2 +-
 src/backend/nls.mk                            |  2 +-
 src/backend/nodes/Makefile                    | 12 ++--
 src/backend/parser/Makefile                   |  8 +--
 src/backend/port/Makefile                     |  2 +-
 src/backend/replication/Makefile              | 10 ++-
 .../replication/libpqwalreceiver/Makefile     |  2 +-
 src/backend/replication/pgoutput/Makefile     |  2 +-
 src/backend/snowball/Makefile                 |  4 --
 src/backend/storage/lmgr/Makefile             |  4 +-
 src/backend/utils/Makefile                    | 28 +++------
 src/backend/utils/activity/Makefile           |  2 +-
 src/backend/utils/adt/Makefile                |  5 +-
 src/backend/utils/mb/Makefile                 |  2 +-
 src/backend/utils/mb/Unicode/Makefile         |  2 -
 src/backend/utils/mb/conversion_procs/proc.mk |  2 +-
 src/backend/utils/misc/Makefile               |  3 +-
 src/bin/initdb/Makefile                       |  2 +-
 src/bin/pg_amcheck/Makefile                   |  2 +-
 src/bin/pg_archivecleanup/Makefile            |  2 +-
 src/bin/pg_basebackup/Makefile                |  2 +-
 src/bin/pg_checksums/Makefile                 |  2 +-
 src/bin/pg_config/Makefile                    |  2 +-
 src/bin/pg_controldata/Makefile               |  2 +-
 src/bin/pg_ctl/Makefile                       |  2 +-
 src/bin/pg_dump/Makefile                      |  2 +-
 src/bin/pg_resetwal/Makefile                  |  2 +-
 src/bin/pg_rewind/Makefile                    |  2 +-
 src/bin/pg_test_fsync/Makefile                |  2 +-
 src/bin/pg_test_timing/Makefile               |  2 +-
 src/bin/pg_upgrade/Makefile                   |  2 +-
 src/bin/pg_verifybackup/Makefile              |  2 +-
 src/bin/pg_waldump/Makefile                   |  2 +-
 src/bin/pgbench/Makefile                      |  4 --
 src/bin/psql/Makefile                         |  6 --
 src/bin/scripts/Makefile                      |  2 +-
 src/common/Makefile                           |  5 --
 src/common/unicode/Makefile                   |  2 -
 src/fe_utils/Makefile                         |  6 --
 src/include/Makefile                          |  2 +-
 src/interfaces/ecpg/Makefile                  |  2 +-
 src/interfaces/ecpg/compatlib/Makefile        |  2 -
 src/interfaces/ecpg/ecpglib/Makefile          |  2 -
 src/interfaces/ecpg/include/Makefile          |  2 +-
 src/interfaces/ecpg/pgtypeslib/Makefile       |  2 -
 src/interfaces/ecpg/preproc/Makefile          |  6 --
 src/interfaces/ecpg/test/Makefile             |  4 +-
 src/interfaces/libpq/Makefile                 |  3 -
 src/interfaces/libpq/test/Makefile            |  2 +-
 src/makefiles/pgxs.mk                         |  2 +-
 src/nls-global.mk                             |  2 +-
 src/pl/plperl/GNUmakefile                     |  2 +-
 src/pl/plpgsql/src/Makefile                   |  7 ---
 src/pl/plpython/Makefile                      |  6 +-
 src/pl/tcl/Makefile                           |  5 --
 src/port/Makefile                             |  2 +-
 src/test/authentication/Makefile              |  2 +-
 src/test/examples/Makefile                    |  2 +-
 src/test/icu/Makefile                         |  2 +-
 src/test/isolation/Makefile                   |  6 --
 src/test/kerberos/Makefile                    |  2 +-
 src/test/ldap/Makefile                        |  2 +-
 src/test/locale/Makefile                      |  2 +-
 src/test/recovery/Makefile                    |  2 +-
 src/test/regress/GNUmakefile                  |  2 +-
 src/test/ssl/Makefile                         |  2 +-
 src/test/ssl/sslfiles.mk                      |  4 +-
 src/test/subscription/Makefile                |  2 +-
 src/timezone/Makefile                         |  2 +-
 src/tools/ifaddrs/Makefile                    |  2 +-
 src/tools/pg_bsd_indent/Makefile              |  2 +-
 85 files changed, 123 insertions(+), 270 deletions(-)

diff --git a/GNUmakefile.in b/GNUmakefile.in
index 9c18c56233..80db4c73f8 100644
--- a/GNUmakefile.in
+++ b/GNUmakefile.in
@@ -41,7 +41,7 @@ install-world-bin-contrib-recurse: install-world-bin-src-recurse
 
 $(call recurse,installdirs uninstall init-po update-po,doc src config)
 
-$(call recurse,distprep coverage,doc src config contrib)
+$(call recurse,coverage,doc src config contrib)
 
 # clean, distclean, etc should apply to contrib too, even though
 # it's not built by default
@@ -53,7 +53,7 @@ clean:
 
 # Important: distclean `src' last, otherwise Makefile.global
 # will be gone too soon.
-distclean maintainer-clean:
+distclean:
 	$(MAKE) -C doc $@
 	$(MAKE) -C contrib $@
 	$(MAKE) -C config $@
@@ -109,7 +109,6 @@ distdir:
 	      || cp "$(top_srcdir)/$$file" "$(distdir)/$$file"; \
 	  fi || exit; \
 	done
-	$(MAKE) -C $(distdir) distprep
 	$(MAKE) -C $(distdir)/doc/src/sgml/ INSTALL
 	cp $(distdir)/doc/src/sgml/INSTALL $(distdir)/
 	$(MAKE) -C $(distdir) distclean
@@ -122,7 +121,6 @@ distcheck: dist
 	install_prefix=`cd $(dummy) && pwd`; \
 	cd $(distdir) \
 	&& ./configure --prefix="$$install_prefix"
-	$(MAKE) -C $(distdir) -q distprep
 	$(MAKE) -C $(distdir)
 	$(MAKE) -C $(distdir) install
 	$(MAKE) -C $(distdir) uninstall
diff --git a/contrib/cube/Makefile b/contrib/cube/Makefile
index 4fd19aac35..dfb0d806e4 100644
--- a/contrib/cube/Makefile
+++ b/contrib/cube/Makefile
@@ -18,6 +18,8 @@ REGRESS = cube cube_sci
 
 SHLIB_LINK += $(filter -lm, $(LIBS))
 
+EXTRA_CLEAN = cubeparse.h cubeparse.c cubescan.c
+
 ifdef USE_PGXS
 PG_CONFIG = pg_config
 PGXS := $(shell $(PG_CONFIG) --pgxs)
@@ -37,8 +39,3 @@ cubeparse.c: BISONFLAGS += -d
 
 # Force these dependencies to be known even without dependency info built:
 cubeparse.o cubescan.o: cubeparse.h
-
-distprep: cubeparse.c cubescan.c
-
-maintainer-clean:
-	rm -f cubeparse.h cubeparse.c cubescan.c
diff --git a/contrib/fuzzystrmatch/Makefile b/contrib/fuzzystrmatch/Makefile
index e68bc0e33f..04c83a34a7 100644
--- a/contrib/fuzzystrmatch/Makefile
+++ b/contrib/fuzzystrmatch/Makefile
@@ -15,6 +15,8 @@ PGFILEDESC = "fuzzystrmatch - similarities and distance between strings"
 
 REGRESS = fuzzystrmatch fuzzystrmatch_utf8
 
+EXTRA_CLEAN = daitch_mokotoff.h
+
 ifdef USE_PGXS
 PG_CONFIG = pg_config
 PGXS := $(shell $(PG_CONFIG) --pgxs)
@@ -31,10 +33,3 @@ daitch_mokotoff.o: daitch_mokotoff.h
 
 daitch_mokotoff.h: daitch_mokotoff_header.pl
 	$(PERL) $< $@
-
-# daitch_mokotoff.h is included in tarballs, so it has to be made by
-# "distprep" and not cleaned except by "maintainer-clean".
-distprep: daitch_mokotoff.h
-
-maintainer-clean:
-	rm -f daitch_mokotoff.h
diff --git a/contrib/seg/Makefile b/contrib/seg/Makefile
index a1e49bf051..132ec8dbfe 100644
--- a/contrib/seg/Makefile
+++ b/contrib/seg/Makefile
@@ -16,7 +16,7 @@ HEADERS = segdata.h
 
 REGRESS = security seg
 
-EXTRA_CLEAN = y.tab.c y.tab.h
+EXTRA_CLEAN = segparse.h segparse.c segscan.c
 
 ifdef USE_PGXS
 PG_CONFIG = pg_config
@@ -38,8 +38,3 @@ segparse.c: BISONFLAGS += -d
 
 # Force these dependencies to be known even without dependency info built:
 segparse.o segscan.o: segparse.h
-
-distprep: segparse.c segscan.c
-
-maintainer-clean:
-	rm -f segparse.h segparse.c segscan.c
diff --git a/doc/Makefile b/doc/Makefile
index aee3cc0965..24370fc903 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -12,5 +12,5 @@ subdir = doc
 top_builddir = ..
 include $(top_builddir)/src/Makefile.global
 
-all distprep html man install installdirs uninstall clean distclean maintainer-clean:
+all html man install installdirs uninstall clean distclean:
 	$(MAKE) -C src $@
diff --git a/doc/src/Makefile b/doc/src/Makefile
index 30d883815a..2ed02084ff 100644
--- a/doc/src/Makefile
+++ b/doc/src/Makefile
@@ -4,5 +4,5 @@ subdir = doc/src
 top_builddir = ../..
 include $(top_builddir)/src/Makefile.global
 
-all distprep html man install installdirs uninstall clean distclean maintainer-clean:
+all html man install installdirs uninstall clean distclean:
 	$(MAKE) -C sgml $@
diff --git a/doc/src/sgml/Makefile b/doc/src/sgml/Makefile
index 1e55e531db..49d35dd0d6 100644
--- a/doc/src/sgml/Makefile
+++ b/doc/src/sgml/Makefile
@@ -7,8 +7,7 @@
 #----------------------------------------------------------------------------
 
 # This makefile is for building and installing the documentation.
-# When a release tarball is created, the documentation files are
-# prepared using the distprep target.  In Git-based trees these files
+# In Git-based trees these files
 # don't exist, unless explicitly built, so we skip the installation in
 # that case.
 
@@ -28,8 +27,6 @@ include $(top_builddir)/src/Makefile.global
 
 all: html man
 
-distprep: html distprep-man
-
 
 ifndef DBTOEPUB
 DBTOEPUB = $(missing) dbtoepub
@@ -77,7 +74,7 @@ postgres-full.xml: postgres.sgml $(ALLSGML)
 ## Man pages
 ##
 
-man distprep-man: man-stamp
+man: man-stamp
 
 man-stamp: stylesheet-man.xsl postgres-full.xml
 	$(XSLTPROC) $(XMLINCLUDE) $(XSLTPROCFLAGS) $(XSLTPROC_MAN_FLAGS) $^
@@ -89,10 +86,9 @@ man-stamp: stylesheet-man.xsl postgres-full.xml
 ##
 
 # Technically, this should depend on Makefile.global, but then
-# version.sgml would need to be rebuilt after every configure run,
-# even in distribution tarballs.  So this is cheating a bit, but it
-# will achieve the goal of updating the version number when it
-# changes.
+# version.sgml would need to be rebuilt after every configure run.  So
+# this is cheating a bit, but it will achieve the goal of updating the
+# version number when it changes.
 version.sgml: $(top_srcdir)/configure
 	{ \
 	  echo "<!ENTITY version \"$(VERSION)\">"; \
@@ -305,8 +301,6 @@ clean:
 	rm -f *.texixml *.texi *.info db2texi.refs
 
 distclean: clean
-
-maintainer-clean: distclean
 # HTML
 	rm -fr html/ html-stamp
 # man
diff --git a/doc/src/sgml/installation.sgml b/doc/src/sgml/installation.sgml
index 468759583c..36c1ec2918 100644
--- a/doc/src/sgml/installation.sgml
+++ b/doc/src/sgml/installation.sgml
@@ -72,8 +72,7 @@ <title>Requirements</title>
 
       Alternatively, <productname>PostgreSQL</productname> can be built using
       <ulink url="https://mesonbuild.com/">Meson</ulink>.  This is currently
-      experimental and only works when building from a Git checkout (not from
-      a distribution tarball).  If you choose to use
+      experimental.  If you choose to use
       <application>Meson</application>, then you don't need
       <acronym>GNU</acronym> <application>make</application>, but the other
       requirements below still apply.
diff --git a/meson.build b/meson.build
index 862c955453..a8a4344e00 100644
--- a/meson.build
+++ b/meson.build
@@ -72,7 +72,7 @@ configure. Alternatively use a separate check out for meson based builds.
 @0@
 ****'''
 if fs.exists(meson.current_source_dir() / 'src' / 'include' / 'pg_config.h')
-  errmsg_cleanup = 'To clean up, run make maintainer-clean in the source tree.'
+  errmsg_cleanup = 'To clean up, run make distclean in the source tree.'
   error(errmsg_nonclean_base.format(errmsg_cleanup))
 endif
 
diff --git a/src/Makefile b/src/Makefile
index 94649c36c7..2f31a2f20a 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -59,16 +59,13 @@ uninstall: uninstall-local
 uninstall-local:
 	rm -f $(addprefix '$(DESTDIR)$(pgxsdir)/$(subdir)'/, Makefile.global Makefile.port Makefile.shlib nls-global.mk)
 
-distprep:
-	$(MAKE) -C test/isolation $@
-
 clean:
 	$(MAKE) -C test $@
 	$(MAKE) -C tutorial NO_PGXS=1 $@
 	$(MAKE) -C test/isolation $@
 	$(MAKE) -C tools/pg_bsd_indent $@
 
-distclean maintainer-clean:
+distclean:
 	$(MAKE) -C test $@
 	$(MAKE) -C tutorial NO_PGXS=1 $@
 	$(MAKE) -C test/isolation $@
diff --git a/src/Makefile.global.in b/src/Makefile.global.in
index 985b3ea62b..b3ca6392a6 100644
--- a/src/Makefile.global.in
+++ b/src/Makefile.global.in
@@ -19,11 +19,11 @@
 #
 # Meta configuration
 
-standard_targets = all install installdirs uninstall distprep clean distclean maintainer-clean coverage check checkprep installcheck init-po update-po
+standard_targets = all install installdirs uninstall clean distclean coverage check checkprep installcheck init-po update-po
 # these targets should recurse even into subdirectories not being built:
-standard_always_targets = distprep clean distclean maintainer-clean
+standard_always_targets = clean distclean
 
-.PHONY: $(standard_targets) install-strip html man installcheck-parallel update-unicode
+.PHONY: $(standard_targets) maintainer-clean install-strip html man installcheck-parallel update-unicode
 
 # make `all' the default target
 all:
@@ -35,6 +35,8 @@ all:
 # Never delete any intermediate files automatically.
 .SECONDARY:
 
+maintainer-clean: distclean
+
 # PostgreSQL version number
 VERSION = @PACKAGE_VERSION@
 MAJORVERSION = @PG_MAJORVERSION@
@@ -907,7 +909,7 @@ recurse = $(foreach target,$(if $1,$1,$(standard_targets)),$(foreach subdir,$(if
 # If a makefile's list of SUBDIRS varies depending on configuration, then
 # any subdirectories excluded from SUBDIRS should instead be added to
 # ALWAYS_SUBDIRS, and then it must call recurse_always as well as recurse.
-# This ensures that distprep, distclean, etc will apply to all subdirectories.
+# This ensures that distclean, etc will apply to all subdirectories.
 # In the normal case all arguments will be defaulted.
 # $1: targets to make recursive (defaults to standard_always_targets)
 # $2: list of subdirs (defaults to ALWAYS_SUBDIRS variable)
@@ -962,7 +964,7 @@ include $(Po_files)
 endif
 
 # hook for clean-up
-clean distclean maintainer-clean: clean-deps
+clean distclean: clean-deps
 
 .PHONY: clean-deps
 clean-deps:
@@ -1046,7 +1048,7 @@ lcov_test.info: $(all_gcda_files)
 
 
 # hook for clean-up
-clean distclean maintainer-clean: clean-coverage
+clean distclean: clean-coverage
 
 .PHONY: clean-coverage
 clean-coverage:
diff --git a/src/backend/Makefile b/src/backend/Makefile
index 3e275ac759..0a475f01a4 100644
--- a/src/backend/Makefile
+++ b/src/backend/Makefile
@@ -138,42 +138,33 @@ utils/activity/wait_event_types.h: utils/activity/generate-wait_event_types.pl u
 
 # run this unconditionally to avoid needing to know its dependencies here:
 submake-catalog-headers:
-	$(MAKE) -C catalog distprep generated-header-symlinks
+	$(MAKE) -C catalog generated-header-symlinks
 
 # run this unconditionally to avoid needing to know its dependencies here:
 submake-nodes-headers:
-	$(MAKE) -C nodes distprep generated-header-symlinks
+	$(MAKE) -C nodes generated-header-symlinks
 
 # run this unconditionally to avoid needing to know its dependencies here:
 submake-utils-headers:
-	$(MAKE) -C utils distprep generated-header-symlinks
+	$(MAKE) -C utils generated-header-symlinks
 
 .PHONY: submake-catalog-headers submake-nodes-headers submake-utils-headers
 
 # Make symlinks for these headers in the include directory. That way
 # we can cut down on the -I options. Also, a symlink is automatically
 # up to date when we update the base file.
-#
-# The point of the prereqdir incantation in some of the rules below is to
-# force the symlink to use an absolute path rather than a relative path.
-# For headers which are generated by make distprep, the actual header within
-# src/backend will be in the source tree, while the symlink in src/include
-# will be in the build tree, so a simple ../.. reference won't work.
-# For headers generated during regular builds, we prefer a relative symlink.
 
 .PHONY: generated-headers
 
-generated-headers: $(top_builddir)/src/include/storage/lwlocknames.h $(top_builddir)/src/include/utils/wait_event_types.h submake-catalog-headers submake-nodes-headers submake-utils-headers
+generated-headers: $(top_builddir)/src/include/storage/lwlocknames.h $(top_builddir)/src/include/utils/wait_event_types.h submake-catalog-headers submake-nodes-headers submake-utils-headers parser/gram.h
 
 $(top_builddir)/src/include/storage/lwlocknames.h: storage/lmgr/lwlocknames.h
-	prereqdir=`cd '$(dir $<)' >/dev/null && pwd` && \
-	  cd '$(dir $@)' && rm -f $(notdir $@) && \
-	  $(LN_S) "$$prereqdir/$(notdir $<)" .
+	rm -f '$@'
+	$(LN_S) ../../backend/$< '$@'
 
 $(top_builddir)/src/include/utils/wait_event_types.h: utils/activity/wait_event_types.h
-	prereqdir=`cd '$(dir $<)' >/dev/null && pwd` && \
-	  cd '$(dir $@)' && rm -f $(notdir $@) && \
-	  $(LN_S) "$$prereqdir/$(notdir $<)" .
+	rm -f '$@'
+	$(LN_S) ../../backend/$< '$@'
 
 utils/probes.o: utils/probes.d $(SUBDIROBJS)
 	$(DTRACE) $(DTRACEFLAGS) -C -G -s $(call expand_subsys,$^) -o $@
@@ -181,16 +172,12 @@ utils/probes.o: utils/probes.d $(SUBDIROBJS)
 
 ##########################################################################
 
-# Be sure that these files get removed by the maintainer-clean target
-distprep:
+# This target is only needed by nls.mk.
+.PHONY: generated-parser-sources
+generated-parser-sources:
 	$(MAKE) -C parser	gram.c gram.h scan.c
 	$(MAKE) -C bootstrap	bootparse.c bootparse.h bootscanner.c
-	$(MAKE) -C catalog	distprep
-	$(MAKE) -C nodes	distprep
 	$(MAKE) -C replication	repl_gram.c repl_gram.h repl_scanner.c syncrep_gram.c syncrep_gram.h syncrep_scanner.c
-	$(MAKE) -C storage/lmgr	lwlocknames.h lwlocknames.c
-	$(MAKE) -C utils	distprep
-	$(MAKE) -C utils/activity	wait_event_types.h pgstat_wait_event.c
 	$(MAKE) -C utils/adt	jsonpath_gram.c jsonpath_gram.h jsonpath_scan.c
 	$(MAKE) -C utils/misc	guc-file.c
 
@@ -290,34 +277,9 @@ ifeq ($(PORTNAME), win32)
 endif
 
 distclean: clean
+# generated by configure
 	rm -f port/tas.s port/pg_sema.c port/pg_shmem.c
 
-maintainer-clean: distclean
-	$(MAKE) -C catalog $@
-	$(MAKE) -C nodes $@
-	$(MAKE) -C utils $@
-	rm -f bootstrap/bootparse.c \
-	      bootstrap/bootparse.h \
-	      bootstrap/bootscanner.c \
-	      parser/gram.c \
-	      parser/gram.h \
-	      parser/scan.c \
-	      replication/repl_gram.c \
-	      replication/repl_gram.h \
-	      replication/repl_scanner.c \
-	      replication/syncrep_gram.c \
-	      replication/syncrep_gram.h \
-	      replication/syncrep_scanner.c \
-	      storage/lmgr/lwlocknames.c \
-	      storage/lmgr/lwlocknames.h \
-	      utils/activity/pgstat_wait_event.c \
-	      utils/activity/wait_event_funcs_data.c \
-	      utils/activity/wait_event_types.h \
-	      utils/adt/jsonpath_gram.c \
-	      utils/adt/jsonpath_gram.h \
-	      utils/adt/jsonpath_scan.c \
-	      utils/misc/guc-file.c
-
 
 ##########################################################################
 #
diff --git a/src/backend/bootstrap/Makefile b/src/backend/bootstrap/Makefile
index 606c8021e7..509b51e648 100644
--- a/src/backend/bootstrap/Makefile
+++ b/src/backend/bootstrap/Makefile
@@ -28,5 +28,7 @@ bootparse.c: BISONFLAGS += -d
 # Force these dependencies to be known even without dependency info built:
 bootparse.o bootscanner.o: bootparse.h
 
-# bootparse.c and bootscanner.c are in the distribution tarball, so
-# they are not cleaned here.
+clean:
+	rm -f bootparse.c \
+	      bootparse.h \
+	      bootscanner.c
diff --git a/src/backend/catalog/Makefile b/src/backend/catalog/Makefile
index 3e9994793d..ec7b6f5362 100644
--- a/src/backend/catalog/Makefile
+++ b/src/backend/catalog/Makefile
@@ -152,9 +152,7 @@ POSTGRES_BKI_DATA = $(addprefix $(top_srcdir)/src/include/catalog/,\
 	pg_type.dat \
 	)
 
-all: distprep generated-header-symlinks
-
-distprep: bki-stamp
+all: generated-header-symlinks
 
 .PHONY: generated-header-symlinks
 
@@ -173,14 +171,12 @@ bki-stamp: genbki.pl Catalog.pm $(POSTGRES_BKI_SRCS) $(POSTGRES_BKI_DATA) $(top_
 		--set-version=$(MAJORVERSION) $(POSTGRES_BKI_SRCS)
 	touch $@
 
-# The generated headers must all be symlinked into builddir/src/include/,
-# using absolute links for the reasons explained in src/backend/Makefile.
+# The generated headers must all be symlinked into src/include/.
 # We use header-stamp to record that we've done this because the symlinks
 # themselves may appear older than bki-stamp.
 $(top_builddir)/src/include/catalog/header-stamp: bki-stamp
-	prereqdir=`cd '$(dir $<)' >/dev/null && pwd` && \
 	cd '$(dir $@)' && for file in $(GENERATED_HEADERS); do \
-	  rm -f $$file && $(LN_S) "$$prereqdir/$$file" . ; \
+	  rm -f $$file && $(LN_S) "../../../$(subdir)/$$file" . ; \
 	done
 	touch $@
 
@@ -201,9 +197,5 @@ installdirs:
 uninstall-data:
 	rm -f $(addprefix '$(DESTDIR)$(datadir)'/, postgres.bki system_constraints.sql system_functions.sql system_views.sql information_schema.sql sql_features.txt)
 
-# postgres.bki, system_constraints.sql, and the generated headers are
-# in the distribution tarball, so they are not cleaned here.
 clean:
-
-maintainer-clean: clean
 	rm -f bki-stamp postgres.bki system_constraints.sql $(GENERATED_HEADERS)
diff --git a/src/backend/jit/llvm/Makefile b/src/backend/jit/llvm/Makefile
index 2da122a391..0036c4f552 100644
--- a/src/backend/jit/llvm/Makefile
+++ b/src/backend/jit/llvm/Makefile
@@ -71,6 +71,6 @@ uninstall-types:
 
 include $(top_srcdir)/src/Makefile.shlib
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 	rm -f $(OBJS)
 	rm -f llvmjit_types.bc
diff --git a/src/backend/nls.mk b/src/backend/nls.mk
index 8263527c85..dfb053c2a7 100644
--- a/src/backend/nls.mk
+++ b/src/backend/nls.mk
@@ -22,7 +22,7 @@ GETTEXT_FLAGS    = $(BACKEND_COMMON_GETTEXT_FLAGS) \
     report_invalid_record:2:c-format \
     ereport_startup_progress:1:c-format
 
-gettext-files: distprep
+gettext-files: generated-parser-sources generated-headers
 	find $(srcdir) $(srcdir)/../common $(srcdir)/../port -name '*.c' -print | LC_ALL=C sort >$@
 
 my-clean:
diff --git a/src/backend/nodes/Makefile b/src/backend/nodes/Makefile
index 0a95e683d0..ebbe9052cb 100644
--- a/src/backend/nodes/Makefile
+++ b/src/backend/nodes/Makefile
@@ -65,9 +65,7 @@ node_headers = \
 
 # see also catalog/Makefile for an explanation of these make rules
 
-all: distprep generated-header-symlinks
-
-distprep: node-support-stamp
+all: generated-header-symlinks
 
 .PHONY: generated-header-symlinks
 
@@ -81,14 +79,12 @@ node-support-stamp: gen_node_support.pl $(addprefix $(top_srcdir)/src/include/,$
 	$(PERL) $^
 	touch $@
 
-# These generated headers must be symlinked into builddir/src/include/,
-# using absolute links for the reasons explained in src/backend/Makefile.
+# These generated headers must be symlinked into src/include/.
 # We use header-stamp to record that we've done this because the symlinks
 # themselves may appear older than node-support-stamp.
 $(top_builddir)/src/include/nodes/header-stamp: node-support-stamp
-	prereqdir=`cd '$(dir $<)' >/dev/null && pwd` && \
 	cd '$(dir $@)' && for file in nodetags.h; do \
-	  rm -f $$file && $(LN_S) "$$prereqdir/$$file" . ; \
+	  rm -f $$file && $(LN_S) "../../../$(subdir)/$$file" . ; \
 	done
 	touch $@
 
@@ -98,5 +94,5 @@ outfuncs.o: outfuncs.c outfuncs.funcs.c outfuncs.switch.c | node-support-stamp
 queryjumblefuncs.o: queryjumblefuncs.c queryjumblefuncs.funcs.c queryjumblefuncs.switch.c | node-support-stamp
 readfuncs.o:  readfuncs.c readfuncs.funcs.c readfuncs.switch.c | node-support-stamp
 
-maintainer-clean: clean
+clean:
 	rm -f node-support-stamp $(addsuffix funcs.funcs.c,copy equal out queryjumble read) $(addsuffix funcs.switch.c,copy equal out queryjumble read) nodetags.h
diff --git a/src/backend/parser/Makefile b/src/backend/parser/Makefile
index 9f1c4022bb..401c16686c 100644
--- a/src/backend/parser/Makefile
+++ b/src/backend/parser/Makefile
@@ -64,8 +64,8 @@ scan.c: FLEX_FIX_WARNING=yes
 # Force these dependencies to be known even without dependency info built:
 gram.o scan.o parser.o: gram.h
 
-
-# gram.c, gram.h, and scan.c are in the distribution tarball, so they
-# are not cleaned here.
-clean distclean maintainer-clean:
+clean:
+	rm -f gram.c \
+	      gram.h \
+	      scan.c
 	rm -f lex.backup
diff --git a/src/backend/port/Makefile b/src/backend/port/Makefile
index 2d00b4f05a..47338d9922 100644
--- a/src/backend/port/Makefile
+++ b/src/backend/port/Makefile
@@ -43,6 +43,6 @@ else
 	$(CC) $(CFLAGS) -c $<
 endif
 
-distclean clean:
+clean:
 	rm -f tas_cpp.s
 	$(MAKE) -C win32 clean
diff --git a/src/backend/replication/Makefile b/src/backend/replication/Makefile
index 23f29ba545..7f867ee91d 100644
--- a/src/backend/replication/Makefile
+++ b/src/backend/replication/Makefile
@@ -48,6 +48,10 @@ syncrep_gram.c: BISONFLAGS += -d
 # Force these dependencies to be known even without dependency info built:
 syncrep_gram.o syncrep_scanner.o: syncrep_gram.h
 
-# repl_gram.c, repl_scanner.c, syncrep_gram.c and syncrep_scanner.c
-# are in the distribution tarball, so they are not cleaned here.
-# (Our parent Makefile takes care of them during maintainer-clean.)
+clean:
+	rm -f repl_gram.c \
+	      repl_gram.h \
+	      repl_scanner.c \
+	      syncrep_gram.c \
+	      syncrep_gram.h \
+	      syncrep_scanner.c
diff --git a/src/backend/replication/libpqwalreceiver/Makefile b/src/backend/replication/libpqwalreceiver/Makefile
index f26daa135f..e882907350 100644
--- a/src/backend/replication/libpqwalreceiver/Makefile
+++ b/src/backend/replication/libpqwalreceiver/Makefile
@@ -33,5 +33,5 @@ installdirs: installdirs-lib
 
 uninstall: uninstall-lib
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 	rm -f $(OBJS)
diff --git a/src/backend/replication/pgoutput/Makefile b/src/backend/replication/pgoutput/Makefile
index 3b41fbcfac..d89d317fe7 100644
--- a/src/backend/replication/pgoutput/Makefile
+++ b/src/backend/replication/pgoutput/Makefile
@@ -28,5 +28,5 @@ installdirs: installdirs-lib
 
 uninstall: uninstall-lib
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 	rm -f $(OBJS)
diff --git a/src/backend/snowball/Makefile b/src/backend/snowball/Makefile
index 4bebfa0250..efc4300eb9 100644
--- a/src/backend/snowball/Makefile
+++ b/src/backend/snowball/Makefile
@@ -104,8 +104,6 @@ include $(top_srcdir)/src/Makefile.shlib
 $(SQLSCRIPT): snowball_create.pl snowball_func.sql.in snowball.sql.in
 	$(PERL) $< --input ${srcdir} --outdir .
 
-distprep: $(SQLSCRIPT)
-
 install: all installdirs install-lib install-script
 	$(INSTALL_DATA) $(addprefix $(srcdir)/stopwords/,$(stop_files)) '$(DESTDIR)$(datadir)/$(DICTDIR)'
 
@@ -122,6 +120,4 @@ uninstall: uninstall-lib
 
 clean distclean: clean-lib
 	rm -f $(OBJS)
-
-maintainer-clean: distclean
 	rm -f $(SQLSCRIPT)
diff --git a/src/backend/storage/lmgr/Makefile b/src/backend/storage/lmgr/Makefile
index b25b7ee421..c48ba943c4 100644
--- a/src/backend/storage/lmgr/Makefile
+++ b/src/backend/storage/lmgr/Makefile
@@ -45,8 +45,6 @@ lwlocknames.h: $(top_srcdir)/src/backend/storage/lmgr/lwlocknames.txt generate-l
 check: s_lock_test
 	./s_lock_test
 
-clean distclean:
+clean:
 	rm -f s_lock_test
-
-maintainer-clean: clean
 	rm -f lwlocknames.h lwlocknames.c
diff --git a/src/backend/utils/Makefile b/src/backend/utils/Makefile
index deb901609f..e184e3dfdf 100644
--- a/src/backend/utils/Makefile
+++ b/src/backend/utils/Makefile
@@ -34,13 +34,14 @@ catalogdir  = $(top_srcdir)/src/backend/catalog
 
 include $(top_srcdir)/src/backend/common.mk
 
-all: distprep probes.h generated-header-symlinks
+all: probes.h generated-header-symlinks
 
-distprep: fmgr-stamp errcodes.h
+.PHONY: generated-header-symlinks submake-adt-headers
 
-.PHONY: generated-header-symlinks
+generated-header-symlinks: $(top_builddir)/src/include/utils/header-stamp submake-adt-headers
 
-generated-header-symlinks: $(top_builddir)/src/include/utils/header-stamp $(top_builddir)/src/include/utils/probes.h
+submake-adt-headers:
+	$(MAKE) -C adt jsonpath_gram.h
 
 $(SUBDIRS:%=%-recursive): fmgr-stamp errcodes.h
 
@@ -66,22 +67,15 @@ probes.h: Gen_dummy_probes.sed probes.d
 	sed -f $^ >$@
 endif
 
-# These generated headers must be symlinked into builddir/src/include/,
-# using absolute links for the reasons explained in src/backend/Makefile.
+# These generated headers must be symlinked into src/include/.
 # We use header-stamp to record that we've done this because the symlinks
 # themselves may appear older than fmgr-stamp.
-$(top_builddir)/src/include/utils/header-stamp: fmgr-stamp errcodes.h
-	prereqdir=`cd '$(dir $<)' >/dev/null && pwd` && \
-	cd '$(dir $@)' && for file in fmgroids.h fmgrprotos.h errcodes.h; do \
-	  rm -f $$file && $(LN_S) "$$prereqdir/$$file" . ; \
+$(top_builddir)/src/include/utils/header-stamp: fmgr-stamp errcodes.h probes.h
+	cd '$(dir $@)' && for file in fmgroids.h fmgrprotos.h errcodes.h probes.h; do \
+	  rm -f $$file && $(LN_S) "../../../$(subdir)/$$file" . ; \
 	done
 	touch $@
 
-# probes.h is handled differently because it's not in the distribution tarball.
-$(top_builddir)/src/include/utils/probes.h: probes.h
-	cd '$(dir $@)' && rm -f $(notdir $@) && \
-	    $(LN_S) "../../../$(subdir)/probes.h" .
-
 # Recipe for rebuilding the Perl version of Gen_dummy_probes
 # Nothing depends on it, so it will never be called unless explicitly requested
 # The last two lines of the recipe format the script according to  our
@@ -104,10 +98,6 @@ installdirs:
 uninstall-data:
 	rm -f $(addprefix '$(DESTDIR)$(datadir)'/, errcodes.txt)
 
-# fmgroids.h, fmgrprotos.h, fmgrtab.c, fmgr-stamp, and errcodes.h are in the
-# distribution tarball, so they are not cleaned here.
 clean:
 	rm -f probes.h probes.h.tmp
-
-maintainer-clean: clean
 	rm -f fmgroids.h fmgrprotos.h fmgrtab.c fmgr-stamp errcodes.h
diff --git a/src/backend/utils/activity/Makefile b/src/backend/utils/activity/Makefile
index f57cf3958c..a4397ef907 100644
--- a/src/backend/utils/activity/Makefile
+++ b/src/backend/utils/activity/Makefile
@@ -47,5 +47,5 @@ pgstat_wait_event.c: wait_event_types.h
 wait_event_types.h: $(top_srcdir)/src/backend/utils/activity/wait_event_names.txt generate-wait_event_types.pl
 	$(PERL) $(srcdir)/generate-wait_event_types.pl --code $<
 
-maintainer-clean: clean
+clean:
 	rm -f wait_event_types.h pgstat_wait_event.c wait_event_funcs_data.c
diff --git a/src/backend/utils/adt/Makefile b/src/backend/utils/adt/Makefile
index 0de0bbb1b8..199eae525d 100644
--- a/src/backend/utils/adt/Makefile
+++ b/src/backend/utils/adt/Makefile
@@ -132,10 +132,9 @@ jsonpath_scan.c: FLEX_NO_BACKUP=yes
 # Force these dependencies to be known even without dependency info built:
 jsonpath_gram.o jsonpath_scan.o: jsonpath_gram.h
 
-# jsonpath_gram.c and jsonpath_scan.c are in the distribution tarball,
-# so they are not cleaned here.
-clean distclean maintainer-clean:
+clean:
 	rm -f lex.backup
+	rm -f jsonpath_gram.c jsonpath_gram.h jsonpath_scan.c
 
 like.o: like.c like_match.c
 
diff --git a/src/backend/utils/mb/Makefile b/src/backend/utils/mb/Makefile
index b19a125fa2..bbde71b5aa 100644
--- a/src/backend/utils/mb/Makefile
+++ b/src/backend/utils/mb/Makefile
@@ -21,5 +21,5 @@ OBJS = \
 
 include $(top_srcdir)/src/backend/common.mk
 
-clean distclean maintainer-clean:
+clean distclean:
 	$(MAKE) -C conversion_procs $@
diff --git a/src/backend/utils/mb/Unicode/Makefile b/src/backend/utils/mb/Unicode/Makefile
index ea930a7b95..c540f34649 100644
--- a/src/backend/utils/mb/Unicode/Makefile
+++ b/src/backend/utils/mb/Unicode/Makefile
@@ -66,8 +66,6 @@ all: $(MAPS)
 
 distclean: clean
 	rm -f $(TEXTS)
-
-maintainer-clean: distclean
 	rm -f $(MAPS)
 
 
diff --git a/src/backend/utils/mb/conversion_procs/proc.mk b/src/backend/utils/mb/conversion_procs/proc.mk
index e0a3b74b25..2eeae28240 100644
--- a/src/backend/utils/mb/conversion_procs/proc.mk
+++ b/src/backend/utils/mb/conversion_procs/proc.mk
@@ -13,5 +13,5 @@ installdirs: installdirs-lib
 
 uninstall: uninstall-lib
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 	rm -f $(OBJS)
diff --git a/src/backend/utils/misc/Makefile b/src/backend/utils/misc/Makefile
index 2910032930..c2971c7678 100644
--- a/src/backend/utils/misc/Makefile
+++ b/src/backend/utils/misc/Makefile
@@ -40,6 +40,5 @@ endif
 
 include $(top_srcdir)/src/backend/common.mk
 
-# Note: guc-file.c is not deleted by 'make clean',
-# since we want to ship it in distribution tarballs.
 clean:
+	rm -f guc-file.c
diff --git a/src/bin/initdb/Makefile b/src/bin/initdb/Makefile
index d69bd89572..7043289239 100644
--- a/src/bin/initdb/Makefile
+++ b/src/bin/initdb/Makefile
@@ -55,7 +55,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/initdb$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f initdb$(X) $(OBJS) localtime.c
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_amcheck/Makefile b/src/bin/pg_amcheck/Makefile
index 947f2267ed..528c588e35 100644
--- a/src/bin/pg_amcheck/Makefile
+++ b/src/bin/pg_amcheck/Makefile
@@ -40,7 +40,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_amcheck$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_amcheck$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_archivecleanup/Makefile b/src/bin/pg_archivecleanup/Makefile
index 49935d6dce..93fd703f22 100644
--- a/src/bin/pg_archivecleanup/Makefile
+++ b/src/bin/pg_archivecleanup/Makefile
@@ -25,7 +25,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_archivecleanup$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_archivecleanup$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_basebackup/Makefile b/src/bin/pg_basebackup/Makefile
index 893a75c942..74dc1ddd6d 100644
--- a/src/bin/pg_basebackup/Makefile
+++ b/src/bin/pg_basebackup/Makefile
@@ -71,7 +71,7 @@ uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_receivewal$(X)'
 	rm -f '$(DESTDIR)$(bindir)/pg_recvlogical$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_basebackup$(X) pg_receivewal$(X) pg_recvlogical$(X) \
 		$(BBOBJS) pg_receivewal.o pg_recvlogical.o \
 		$(OBJS)
diff --git a/src/bin/pg_checksums/Makefile b/src/bin/pg_checksums/Makefile
index 4911f6bee2..ac736b2260 100644
--- a/src/bin/pg_checksums/Makefile
+++ b/src/bin/pg_checksums/Makefile
@@ -36,7 +36,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_checksums$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_checksums$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_config/Makefile b/src/bin/pg_config/Makefile
index 1a405f9c97..cb13aceafa 100644
--- a/src/bin/pg_config/Makefile
+++ b/src/bin/pg_config/Makefile
@@ -33,7 +33,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_config$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_config$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_controldata/Makefile b/src/bin/pg_controldata/Makefile
index aa5bd58222..00ee1e25b3 100644
--- a/src/bin/pg_controldata/Makefile
+++ b/src/bin/pg_controldata/Makefile
@@ -33,7 +33,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_controldata$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_controldata$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_ctl/Makefile b/src/bin/pg_ctl/Makefile
index 4b6d47a8f8..4d29ca72c1 100644
--- a/src/bin/pg_ctl/Makefile
+++ b/src/bin/pg_ctl/Makefile
@@ -42,7 +42,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_ctl$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_ctl$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_dump/Makefile b/src/bin/pg_dump/Makefile
index 24de7593a6..604cddb997 100644
--- a/src/bin/pg_dump/Makefile
+++ b/src/bin/pg_dump/Makefile
@@ -69,6 +69,6 @@ installcheck:
 uninstall:
 	rm -f $(addprefix '$(DESTDIR)$(bindir)'/, pg_dump$(X) pg_restore$(X) pg_dumpall$(X))
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_dump$(X) pg_restore$(X) pg_dumpall$(X) $(OBJS) pg_dump.o common.o pg_dump_sort.o pg_restore.o pg_dumpall.o
 	rm -rf tmp_check
diff --git a/src/bin/pg_resetwal/Makefile b/src/bin/pg_resetwal/Makefile
index 5c86435e22..a93e6611af 100644
--- a/src/bin/pg_resetwal/Makefile
+++ b/src/bin/pg_resetwal/Makefile
@@ -35,7 +35,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_resetwal$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_resetwal$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_rewind/Makefile b/src/bin/pg_rewind/Makefile
index bed05f1609..8df1da80cb 100644
--- a/src/bin/pg_rewind/Makefile
+++ b/src/bin/pg_rewind/Makefile
@@ -49,7 +49,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_rewind$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_rewind$(X) $(OBJS) xlogreader.c
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_test_fsync/Makefile b/src/bin/pg_test_fsync/Makefile
index 631d0f38a8..4c5e518125 100644
--- a/src/bin/pg_test_fsync/Makefile
+++ b/src/bin/pg_test_fsync/Makefile
@@ -31,6 +31,6 @@ installcheck:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_test_fsync$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_test_fsync$(X) $(OBJS)
 	rm -rf tmp_check
diff --git a/src/bin/pg_test_timing/Makefile b/src/bin/pg_test_timing/Makefile
index 84d84c38aa..7f677edadb 100644
--- a/src/bin/pg_test_timing/Makefile
+++ b/src/bin/pg_test_timing/Makefile
@@ -31,6 +31,6 @@ installcheck:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_test_timing$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_test_timing$(X) $(OBJS)
 	rm -rf tmp_check
diff --git a/src/bin/pg_upgrade/Makefile b/src/bin/pg_upgrade/Makefile
index 5834513add..f76aca1b1a 100644
--- a/src/bin/pg_upgrade/Makefile
+++ b/src/bin/pg_upgrade/Makefile
@@ -46,7 +46,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_upgrade$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_upgrade$(X) $(OBJS)
 	rm -rf delete_old_cluster.sh log/ tmp_check/ \
 	       reindex_hash.sql
diff --git a/src/bin/pg_verifybackup/Makefile b/src/bin/pg_verifybackup/Makefile
index 596df15118..c96323faa9 100644
--- a/src/bin/pg_verifybackup/Makefile
+++ b/src/bin/pg_verifybackup/Makefile
@@ -38,7 +38,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_verifybackup$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_verifybackup$(X) $(OBJS)
 	rm -rf tmp_check
 
diff --git a/src/bin/pg_waldump/Makefile b/src/bin/pg_waldump/Makefile
index 0ecf582039..4c1ee64950 100644
--- a/src/bin/pg_waldump/Makefile
+++ b/src/bin/pg_waldump/Makefile
@@ -45,7 +45,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_waldump$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_waldump$(X) $(OBJS) $(RMGRDESCSOURCES) xlogreader.c xlogstats.c
 	rm -rf tmp_check
 
diff --git a/src/bin/pgbench/Makefile b/src/bin/pgbench/Makefile
index 68b6eb0376..987bf64df9 100644
--- a/src/bin/pgbench/Makefile
+++ b/src/bin/pgbench/Makefile
@@ -38,8 +38,6 @@ exprparse.c: BISONFLAGS += -d
 # Force these dependencies to be known even without dependency info built:
 exprparse.o exprscan.o: exprparse.h
 
-distprep: exprparse.c exprscan.c
-
 install: all installdirs
 	$(INSTALL_PROGRAM) pgbench$(X) '$(DESTDIR)$(bindir)/pgbench$(X)'
 
@@ -52,8 +50,6 @@ uninstall:
 clean distclean:
 	rm -f pgbench$(X) $(OBJS)
 	rm -rf tmp_check
-
-maintainer-clean: distclean
 	rm -f exprparse.h exprparse.c exprscan.c
 
 check:
diff --git a/src/bin/psql/Makefile b/src/bin/psql/Makefile
index 1f2bf0c6b0..8ad7c65446 100644
--- a/src/bin/psql/Makefile
+++ b/src/bin/psql/Makefile
@@ -62,8 +62,6 @@ psqlscanslash.c: FLEXFLAGS = -Cfe -p -p
 psqlscanslash.c: FLEX_NO_BACKUP=yes
 psqlscanslash.c: FLEX_FIX_WARNING=yes
 
-distprep: sql_help.h sql_help.c psqlscanslash.c
-
 install: all installdirs
 	$(INSTALL_PROGRAM) psql$(X) '$(DESTDIR)$(bindir)/psql$(X)'
 	$(INSTALL_DATA) $(srcdir)/psqlrc.sample '$(DESTDIR)$(datadir)/psqlrc.sample'
@@ -77,10 +75,6 @@ uninstall:
 clean distclean:
 	rm -f psql$(X) $(OBJS) lex.backup
 	rm -rf tmp_check
-
-# files removed here are supposed to be in the distribution tarball,
-# so do not clean them in the clean/distclean rules
-maintainer-clean: distclean
 	rm -f sql_help.h sql_help.c psqlscanslash.c
 
 check:
diff --git a/src/bin/scripts/Makefile b/src/bin/scripts/Makefile
index a7a9d0fea5..20db40b103 100644
--- a/src/bin/scripts/Makefile
+++ b/src/bin/scripts/Makefile
@@ -48,7 +48,7 @@ installdirs:
 uninstall:
 	rm -f $(addprefix '$(DESTDIR)$(bindir)'/, $(addsuffix $(X), $(PROGRAMS)))
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f $(addsuffix $(X), $(PROGRAMS)) $(addsuffix .o, $(PROGRAMS))
 	rm -f common.o $(WIN32RES)
 	rm -rf tmp_check
diff --git a/src/common/Makefile b/src/common/Makefile
index cc5c54dcee..36eae518b9 100644
--- a/src/common/Makefile
+++ b/src/common/Makefile
@@ -122,8 +122,6 @@ GEN_KEYWORDLIST_DEPS = $(TOOLSDIR)/gen_keywordlist.pl $(TOOLSDIR)/PerfectHash.pm
 
 all: libpgcommon.a libpgcommon_shlib.a libpgcommon_srv.a
 
-distprep: kwlist_d.h
-
 # libpgcommon is needed by some contrib
 install: all installdirs
 	$(INSTALL_STLIB) libpgcommon.a '$(DESTDIR)$(libdir)/libpgcommon.a'
@@ -189,10 +187,7 @@ RYU_OBJS = $(RYU_FILES) $(RYU_FILES:%.o=%_shlib.o) $(RYU_FILES:%.o=%_srv.o)
 
 $(RYU_OBJS): CFLAGS += $(PERMIT_DECLARATION_AFTER_STATEMENT)
 
-# kwlist_d.h is in the distribution tarball, so it is not cleaned here.
 clean distclean:
 	rm -f libpgcommon.a libpgcommon_shlib.a libpgcommon_srv.a
 	rm -f $(OBJS_FRONTEND) $(OBJS_SHLIB) $(OBJS_SRV)
-
-maintainer-clean: distclean
 	rm -f kwlist_d.h
diff --git a/src/common/unicode/Makefile b/src/common/unicode/Makefile
index 382da476cf..d6e427b582 100644
--- a/src/common/unicode/Makefile
+++ b/src/common/unicode/Makefile
@@ -68,5 +68,3 @@ clean:
 
 distclean: clean
 	rm -f UnicodeData.txt EastAsianWidth.txt CompositionExclusions.txt NormalizationTest.txt norm_test_table.h unicode_norm_table.h
-
-maintainer-clean: distclean
diff --git a/src/fe_utils/Makefile b/src/fe_utils/Makefile
index 456d6dd390..8accd5906d 100644
--- a/src/fe_utils/Makefile
+++ b/src/fe_utils/Makefile
@@ -48,8 +48,6 @@ psqlscan.c: FLEXFLAGS = -Cfe -p -p
 psqlscan.c: FLEX_NO_BACKUP=yes
 psqlscan.c: FLEX_FIX_WARNING=yes
 
-distprep: psqlscan.c
-
 # libpgfeutils could be useful to contrib, so install it
 install: all installdirs
 	$(INSTALL_STLIB) libpgfeutils.a '$(DESTDIR)$(libdir)/libpgfeutils.a'
@@ -62,8 +60,4 @@ uninstall:
 
 clean distclean:
 	rm -f libpgfeutils.a $(OBJS) lex.backup
-
-# psqlscan.c is supposed to be in the distribution tarball,
-# so do not clean it in the clean/distclean rules
-maintainer-clean: distclean
 	rm -f psqlscan.c
diff --git a/src/include/Makefile b/src/include/Makefile
index 2d5242561c..743de5abe4 100644
--- a/src/include/Makefile
+++ b/src/include/Makefile
@@ -78,5 +78,5 @@ clean:
 	rm -f catalog/pg_*_d.h catalog/header-stamp
 	rm -f nodes/nodetags.h nodes/header-stamp
 
-distclean maintainer-clean: clean
+distclean: clean
 	rm -f pg_config.h pg_config_ext.h pg_config_os.h stamp-h stamp-ext-h
diff --git a/src/interfaces/ecpg/Makefile b/src/interfaces/ecpg/Makefile
index e4bbf7b8a8..3002bc3c1b 100644
--- a/src/interfaces/ecpg/Makefile
+++ b/src/interfaces/ecpg/Makefile
@@ -23,7 +23,7 @@ install-pgtypeslib-recurse install-ecpglib-recurse install-compatlib-recurse ins
 install-compatlib-recurse: install-ecpglib-recurse
 install-ecpglib-recurse: install-pgtypeslib-recurse
 
-clean distclean maintainer-clean:
+clean distclean:
 	$(MAKE) -C test clean
 
 checktcp: | temp-install
diff --git a/src/interfaces/ecpg/compatlib/Makefile b/src/interfaces/ecpg/compatlib/Makefile
index b9483fba08..695fd1a080 100644
--- a/src/interfaces/ecpg/compatlib/Makefile
+++ b/src/interfaces/ecpg/compatlib/Makefile
@@ -55,5 +55,3 @@ uninstall: uninstall-lib
 
 clean distclean: clean-lib
 	rm -f $(OBJS)
-
-maintainer-clean: distclean
diff --git a/src/interfaces/ecpg/ecpglib/Makefile b/src/interfaces/ecpg/ecpglib/Makefile
index 652e023405..103cce393a 100644
--- a/src/interfaces/ecpg/ecpglib/Makefile
+++ b/src/interfaces/ecpg/ecpglib/Makefile
@@ -66,5 +66,3 @@ uninstall: uninstall-lib
 
 clean distclean: clean-lib
 	rm -f $(OBJS)
-
-maintainer-clean: distclean
diff --git a/src/interfaces/ecpg/include/Makefile b/src/interfaces/ecpg/include/Makefile
index 9c68bf3c47..3476409cef 100644
--- a/src/interfaces/ecpg/include/Makefile
+++ b/src/interfaces/ecpg/include/Makefile
@@ -31,5 +31,5 @@ uninstall:
 	rm -f $(addprefix '$(DESTDIR)$(informix_esql_dir)'/, $(informix_headers))
 	rm -f '$(DESTDIR)$(includedir)'/$(notdir $(ecpg_config_h))
 
-distclean maintainer-clean:
+distclean:
 	rm -f ecpg_config.h stamp-h
diff --git a/src/interfaces/ecpg/pgtypeslib/Makefile b/src/interfaces/ecpg/pgtypeslib/Makefile
index b0e154eb15..e56700a12e 100644
--- a/src/interfaces/ecpg/pgtypeslib/Makefile
+++ b/src/interfaces/ecpg/pgtypeslib/Makefile
@@ -50,5 +50,3 @@ uninstall: uninstall-lib
 
 clean distclean: clean-lib
 	rm -f $(OBJS)
-
-maintainer-clean: distclean
diff --git a/src/interfaces/ecpg/preproc/Makefile b/src/interfaces/ecpg/preproc/Makefile
index 77ae9ab722..afd46cd17c 100644
--- a/src/interfaces/ecpg/preproc/Makefile
+++ b/src/interfaces/ecpg/preproc/Makefile
@@ -81,8 +81,6 @@ ecpg_keywords.o: ecpg_kwlist_d.h
 c_keywords.o: c_kwlist_d.h
 keywords.o: $(top_srcdir)/src/include/parser/kwlist.h
 
-distprep: preproc.y preproc.c preproc.h pgc.c c_kwlist_d.h ecpg_kwlist_d.h
-
 install: all installdirs
 	$(INSTALL_PROGRAM) ecpg$(X) '$(DESTDIR)$(bindir)'
 
@@ -92,11 +90,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/ecpg$(X)'
 
-# preproc.y, preproc.c, preproc.h, pgc.c, c_kwlist_d.h, and ecpg_kwlist_d.h
-# are in the distribution tarball, so they are not cleaned here.
 clean distclean:
 	rm -f *.o ecpg$(X)
 	rm -f typename.c
-
-maintainer-clean: distclean
 	rm -f preproc.y preproc.c preproc.h pgc.c c_kwlist_d.h ecpg_kwlist_d.h
diff --git a/src/interfaces/ecpg/test/Makefile b/src/interfaces/ecpg/test/Makefile
index cf841a3a5b..3769488f16 100644
--- a/src/interfaces/ecpg/test/Makefile
+++ b/src/interfaces/ecpg/test/Makefile
@@ -20,7 +20,7 @@ else
 abs_builddir := $(shell sh -c "pwd -W")
 endif
 
-all install installdirs uninstall distprep:
+all install installdirs uninstall:
 	$(MAKE) -C connect $@
 	$(MAKE) -C sql $@
 	$(MAKE) -C pgtypeslib $@
@@ -29,7 +29,7 @@ all install installdirs uninstall distprep:
 	$(MAKE) -C compat_oracle $@
 	$(MAKE) -C thread $@
 
-clean distclean maintainer-clean:
+clean distclean:
 	$(MAKE) -C connect $@
 	$(MAKE) -C sql $@
 	$(MAKE) -C pgtypeslib $@
diff --git a/src/interfaces/libpq/Makefile b/src/interfaces/libpq/Makefile
index 46653682b0..d0a66cfaa0 100644
--- a/src/interfaces/libpq/Makefile
+++ b/src/interfaces/libpq/Makefile
@@ -165,6 +165,3 @@ clean distclean: clean-lib
 	rm -f $(OBJS) pthread.h libpq-refs-stamp
 # Might be left over from a Win32 client-only build
 	rm -f pg_config_paths.h
-
-maintainer-clean: distclean
-	$(MAKE) -C test $@
diff --git a/src/interfaces/libpq/test/Makefile b/src/interfaces/libpq/test/Makefile
index 75ac08f943..4e17ec1514 100644
--- a/src/interfaces/libpq/test/Makefile
+++ b/src/interfaces/libpq/test/Makefile
@@ -20,5 +20,5 @@ all: $(PROGS)
 
 $(PROGS): $(WIN32RES)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f $(PROGS) *.o
diff --git a/src/makefiles/pgxs.mk b/src/makefiles/pgxs.mk
index 7ba8d5bc98..0de3737e78 100644
--- a/src/makefiles/pgxs.mk
+++ b/src/makefiles/pgxs.mk
@@ -391,7 +391,7 @@ ifdef MODULE_big
 clean: clean-lib
 endif
 
-distclean maintainer-clean: clean
+distclean: clean
 
 
 ifdef REGRESS
diff --git a/src/nls-global.mk b/src/nls-global.mk
index f21bd5ed55..dfff472cb3 100644
--- a/src/nls-global.mk
+++ b/src/nls-global.mk
@@ -171,7 +171,7 @@ all: all-po
 install: install-po
 installdirs: installdirs-po
 uninstall: uninstall-po
-clean distclean maintainer-clean: clean-po
+clean distclean: clean-po
 
 .PHONY: all-po install-po installdirs-po uninstall-po clean-po \
         init-po update-po
diff --git a/src/pl/plperl/GNUmakefile b/src/pl/plperl/GNUmakefile
index 51f8890d15..975f540b3e 100644
--- a/src/pl/plperl/GNUmakefile
+++ b/src/pl/plperl/GNUmakefile
@@ -127,7 +127,7 @@ installcheck: submake
 submake:
 	$(MAKE) -C $(top_builddir)/src/test/regress pg_regress$(X)
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 	rm -f SPI.c Util.c $(OBJS) perlchunks.h plperl_opmask.h
 	rm -rf $(pg_regress_clean_files)
 ifeq ($(PORTNAME), win32)
diff --git a/src/pl/plpgsql/src/Makefile b/src/pl/plpgsql/src/Makefile
index f7eb42d54f..dfb815212f 100644
--- a/src/pl/plpgsql/src/Makefile
+++ b/src/pl/plpgsql/src/Makefile
@@ -104,14 +104,7 @@ submake:
 	$(MAKE) -C $(top_builddir)/src/test/regress pg_regress$(X)
 
 
-distprep: pl_gram.h pl_gram.c plerrcodes.h pl_reserved_kwlist_d.h pl_unreserved_kwlist_d.h
-
-# pl_gram.c, pl_gram.h, plerrcodes.h, pl_reserved_kwlist_d.h, and
-# pl_unreserved_kwlist_d.h are in the distribution tarball, so they
-# are not cleaned here.
 clean distclean: clean-lib
 	rm -f $(OBJS)
 	rm -rf $(pg_regress_clean_files)
-
-maintainer-clean: distclean
 	rm -f pl_gram.c pl_gram.h plerrcodes.h pl_reserved_kwlist_d.h pl_unreserved_kwlist_d.h
diff --git a/src/pl/plpython/Makefile b/src/pl/plpython/Makefile
index 6b1865c240..ef0a5905ae 100644
--- a/src/pl/plpython/Makefile
+++ b/src/pl/plpython/Makefile
@@ -142,6 +142,7 @@ clean distclean: clean-lib
 ifeq ($(PORTNAME), win32)
 	rm -f python${pytverstr}.def
 endif
+	rm -f spiexceptions.h
 
 
 # Force this dependency to be known even without dependency info built:
@@ -149,8 +150,3 @@ plpy_plpymodule.o: spiexceptions.h
 
 spiexceptions.h: $(top_srcdir)/src/backend/utils/errcodes.txt generate-spiexceptions.pl
 	$(PERL) $(srcdir)/generate-spiexceptions.pl $< > $@
-
-distprep: spiexceptions.h
-
-maintainer-clean: distclean
-	rm -f spiexceptions.h
diff --git a/src/pl/tcl/Makefile b/src/pl/tcl/Makefile
index 314f9b2eec..ea52a2efc2 100644
--- a/src/pl/tcl/Makefile
+++ b/src/pl/tcl/Makefile
@@ -63,8 +63,6 @@ pltcl.o: pltclerrcodes.h
 pltclerrcodes.h: $(top_srcdir)/src/backend/utils/errcodes.txt generate-pltclerrcodes.pl
 	$(PERL) $(srcdir)/generate-pltclerrcodes.pl $< > $@
 
-distprep: pltclerrcodes.h
-
 install: all install-lib install-data
 
 installdirs: installdirs-lib
@@ -91,13 +89,10 @@ installcheck: submake
 submake:
 	$(MAKE) -C $(top_builddir)/src/test/regress pg_regress$(X)
 
-# pltclerrcodes.h is in the distribution tarball, so don't clean it here.
 clean distclean: clean-lib
 	rm -f $(OBJS)
 	rm -rf $(pg_regress_clean_files)
 ifeq ($(PORTNAME), win32)
 	rm -f $(tclwithver).def
 endif
-
-maintainer-clean: distclean
 	rm -f pltclerrcodes.h
diff --git a/src/port/Makefile b/src/port/Makefile
index f205c2c9c5..4320dee0d1 100644
--- a/src/port/Makefile
+++ b/src/port/Makefile
@@ -154,6 +154,6 @@ pg_config_paths.h: $(top_builddir)/src/Makefile.global
 	echo "#define HTMLDIR \"$(htmldir)\"" >>$@
 	echo "#define MANDIR \"$(mandir)\"" >>$@
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f libpgport.a libpgport_shlib.a libpgport_srv.a
 	rm -f $(OBJS) $(OBJS_SHLIB) $(OBJS_SRV) pg_config_paths.h
diff --git a/src/test/authentication/Makefile b/src/test/authentication/Makefile
index 46fa72052d..a48ce39aaf 100644
--- a/src/test/authentication/Makefile
+++ b/src/test/authentication/Makefile
@@ -19,5 +19,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/test/examples/Makefile b/src/test/examples/Makefile
index a67f456904..e72d058e0c 100644
--- a/src/test/examples/Makefile
+++ b/src/test/examples/Makefile
@@ -18,5 +18,5 @@ PROGS = testlibpq testlibpq2 testlibpq3 testlibpq4 testlo testlo64
 
 all: $(PROGS)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f $(PROGS) *.o
diff --git a/src/test/icu/Makefile b/src/test/icu/Makefile
index 033b0d03cc..c4fc8cdb8c 100644
--- a/src/test/icu/Makefile
+++ b/src/test/icu/Makefile
@@ -21,5 +21,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/test/isolation/Makefile b/src/test/isolation/Makefile
index b8738b7c1b..11c48fed5b 100644
--- a/src/test/isolation/Makefile
+++ b/src/test/isolation/Makefile
@@ -43,8 +43,6 @@ pg_isolation_regress$(X): isolation_main.o pg_regress.o $(WIN32RES)
 isolationtester$(X): $(OBJS) | submake-libpq submake-libpgport
 	$(CC) $(CFLAGS) $^ $(libpq_pgport) $(LDFLAGS) $(LDFLAGS_EX) $(LIBS) -o $@
 
-distprep: specparse.c specscanner.c
-
 # See notes in src/backend/parser/Makefile about the following two rules
 specparse.h: specparse.c
 	touch $@
@@ -54,14 +52,10 @@ specparse.c: BISONFLAGS += -d
 # Force these dependencies to be known even without dependency info built:
 specparse.o specscanner.o: specparse.h
 
-# specparse.c and specscanner.c are in the distribution tarball,
-# so do not clean them here
 clean distclean:
 	rm -f isolationtester$(X) pg_isolation_regress$(X) $(OBJS) isolation_main.o
 	rm -f pg_regress.o
 	rm -rf $(pg_regress_clean_files)
-
-maintainer-clean: distclean
 	rm -f specparse.h specparse.c specscanner.c
 
 installcheck: all
diff --git a/src/test/kerberos/Makefile b/src/test/kerberos/Makefile
index f460d2c0e7..44da65611e 100644
--- a/src/test/kerberos/Makefile
+++ b/src/test/kerberos/Makefile
@@ -24,5 +24,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/test/ldap/Makefile b/src/test/ldap/Makefile
index 73bc878ea8..d4305ed5eb 100644
--- a/src/test/ldap/Makefile
+++ b/src/test/ldap/Makefile
@@ -21,5 +21,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/test/locale/Makefile b/src/test/locale/Makefile
index 7ba096b542..a40c67af07 100644
--- a/src/test/locale/Makefile
+++ b/src/test/locale/Makefile
@@ -10,7 +10,7 @@ DIRS = de_DE.ISO8859-1 gr_GR.ISO8859-7 koi8-r koi8-to-win1251
 
 all: $(PROGS)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f $(PROGS) *.o
 	rm -rf tmp_check
 	for d in $(DIRS); do \
diff --git a/src/test/recovery/Makefile b/src/test/recovery/Makefile
index c60314d195..49f1d1c118 100644
--- a/src/test/recovery/Makefile
+++ b/src/test/recovery/Makefile
@@ -25,5 +25,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/test/regress/GNUmakefile b/src/test/regress/GNUmakefile
index 38c3a1f85b..388f2700bd 100644
--- a/src/test/regress/GNUmakefile
+++ b/src/test/regress/GNUmakefile
@@ -146,7 +146,7 @@ bigcheck: all | temp-install
 ## Clean up
 ##
 
-clean distclean maintainer-clean: clean-lib
+clean distclean: clean-lib
 # things built by `all' target
 	rm -f $(OBJS) refint$(DLSUFFIX) autoinc$(DLSUFFIX)
 	rm -f pg_regress_main.o pg_regress.o pg_regress$(X)
diff --git a/src/test/ssl/Makefile b/src/test/ssl/Makefile
index af1e06e949..2d7c69068f 100644
--- a/src/test/ssl/Makefile
+++ b/src/test/ssl/Makefile
@@ -23,7 +23,7 @@ export OPENSSL with_ssl
 sslfiles sslfiles-clean:
 	$(MAKE) -f $(srcdir)/sslfiles.mk $@
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
 	$(MAKE) -f $(srcdir)/sslfiles.mk $@
 
diff --git a/src/test/ssl/sslfiles.mk b/src/test/ssl/sslfiles.mk
index 569f1731cd..89ba2d193b 100644
--- a/src/test/ssl/sslfiles.mk
+++ b/src/test/ssl/sslfiles.mk
@@ -269,6 +269,6 @@ sslfiles-clean:
 # clean targets will be run during a "standard" recursive clean run from the
 # main build tree. The sslfiles-clean target must be run explicitly from this
 # directory.
-.PHONY: clean distclean maintainer-clean
-clean distclean maintainer-clean:
+.PHONY: clean distclean
+clean distclean:
 	rm -rf ssl/*.old ssl/new_certs_dir ssl/client*_tmp.key
diff --git a/src/test/subscription/Makefile b/src/test/subscription/Makefile
index 99d1fe012d..36475ffabc 100644
--- a/src/test/subscription/Makefile
+++ b/src/test/subscription/Makefile
@@ -23,5 +23,5 @@ check:
 installcheck:
 	$(prove_installcheck)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -rf tmp_check
diff --git a/src/timezone/Makefile b/src/timezone/Makefile
index fbbaae4cc5..c85e831247 100644
--- a/src/timezone/Makefile
+++ b/src/timezone/Makefile
@@ -75,5 +75,5 @@ ifeq (,$(with_system_tzdata))
 endif
 	$(MAKE) -C tznames $@
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f zic$(X) $(ZICOBJS) abbrevs.txt
diff --git a/src/tools/ifaddrs/Makefile b/src/tools/ifaddrs/Makefile
index e74d754769..ef5e8f0e0e 100644
--- a/src/tools/ifaddrs/Makefile
+++ b/src/tools/ifaddrs/Makefile
@@ -24,5 +24,5 @@ all: test_ifaddrs
 test_ifaddrs: test_ifaddrs.o $(libpq_backend_dir)/ifaddr.o
 	$(CC) $(CFLAGS) test_ifaddrs.o $(libpq_backend_dir)/ifaddr.o $(LDFLAGS) $(LDFLAGS_EX) $(LIBS) -o $@$(X)
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f test_ifaddrs$(X) $(OBJS)
diff --git a/src/tools/pg_bsd_indent/Makefile b/src/tools/pg_bsd_indent/Makefile
index d176ceb326..ce5d815f07 100644
--- a/src/tools/pg_bsd_indent/Makefile
+++ b/src/tools/pg_bsd_indent/Makefile
@@ -39,7 +39,7 @@ installdirs:
 uninstall:
 	rm -f '$(DESTDIR)$(bindir)/pg_bsd_indent$(X)'
 
-clean distclean maintainer-clean:
+clean distclean:
 	rm -f pg_bsd_indent$(X) $(OBJS)
 	rm -rf log/ tmp_check/
 
-- 
2.42.0