From 853d4c901ce4b53285b43ddf44cb567f774a2dd8 Mon Sep 17 00:00:00 2001
From: Alvaro Herrera <alvherre@alvh.no-ip.org>
Date: Fri, 31 May 2019 11:20:23 -0400
Subject: [PATCH] gcov_flush stuff

---
 config/c-compiler.m4 |  15 +++++++
 configure            | 102 +++++++++++++++++++++++++++++++++++++++++++
 configure.in         |   9 ++++
 3 files changed, 126 insertions(+)

diff --git a/config/c-compiler.m4 b/config/c-compiler.m4
index 71b645839d..0a73fd4624 100644
--- a/config/c-compiler.m4
+++ b/config/c-compiler.m4
@@ -394,6 +394,21 @@ AC_DEFINE_UNQUOTED(AS_TR_CPP([HAVE$1]), 1,
                    [Define to 1 if your compiler understands $1.])
 fi])# PGAC_CHECK_BUILTIN_FUNC
 
+AC_DEFUN([PGAC_CHECK_BUILTIN_FUNC0],
+[AC_CACHE_CHECK(for $1, pgac_cv$1,
+[AC_LINK_IFELSE([AC_LANG_PROGRAM([
+int
+call$1()
+{
+    return $1();
+}], [])],
+[pgac_cv$1=yes],
+[pgac_cv$1=no])])
+if test x"${pgac_cv$1}" = xyes ; then
+AC_DEFINE_UNQUOTED(AS_TR_CPP([HAVE$1]), 1,
+                   [Define to 1 if your compiler understands $1.])
+fi])# PGAC_CHECK_BUILTIN_FUNC0
+
 
 
 # PGAC_PROG_VARCC_VARFLAGS_OPT
diff --git a/configure b/configure
index fd61bf6472..28ebab733f 100755
--- a/configure
+++ b/configure
@@ -11915,6 +11915,69 @@ fi
   fi
 fi
 
+if test "$enable_coverage" = yes ; then
+  if test "$PORTNAME" != "win32"; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing __gcov_flush" >&5
+$as_echo_n "checking for library containing __gcov_flush... " >&6; }
+if ${ac_cv_search___gcov_flush+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char __gcov_flush ();
+int
+main ()
+{
+return __gcov_flush ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' gcov; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_search___gcov_flush=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if ${ac_cv_search___gcov_flush+:} false; then :
+  break
+fi
+done
+if ${ac_cv_search___gcov_flush+:} false; then :
+
+else
+  ac_cv_search___gcov_flush=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search___gcov_flush" >&5
+$as_echo "$ac_cv_search___gcov_flush" >&6; }
+ac_res=$ac_cv_search___gcov_flush
+if test "$ac_res" != no; then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+else
+  as_fn_error $? "could not find __gcov_flush" "$LINENO" 5
+fi
+
+	fi
+fi
+
 if test "$with_openssl" = yes ; then
     if test "$PORTNAME" != "win32"; then
      { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CRYPTO_new_ex_data in -lcrypto" >&5
@@ -15420,6 +15483,45 @@ _ACEOF
 
 fi
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for __gcov_flush" >&5
+$as_echo_n "checking for __gcov_flush... " >&6; }
+if ${pgac_cv__gcov_flush+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+call__gcov_flush()
+{
+    return __gcov_flush(x);
+}
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  pgac_cv__gcov_flush=yes
+else
+  pgac_cv__gcov_flush=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv__gcov_flush" >&5
+$as_echo "$pgac_cv__gcov_flush" >&6; }
+if test x"${pgac_cv__gcov_flush}" = xyes ; then
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE__GCOV_FLUSH 1
+_ACEOF
+
+fi
+
 ac_fn_c_check_func "$LINENO" "fseeko" "ac_cv_func_fseeko"
 if test "x$ac_cv_func_fseeko" = xyes; then :
   $as_echo "#define HAVE_FSEEKO 1" >>confdefs.h
diff --git a/configure.in b/configure.in
index 4586a1716c..bc97398bda 100644
--- a/configure.in
+++ b/configure.in
@@ -1197,6 +1197,13 @@ if test "$with_gssapi" = yes ; then
   fi
 fi
 
+if test "$enable_coverage" = yes ; then
+  if test "$PORTNAME" != "win32"; then
+    AC_SEARCH_LIBS(__gcov_flush, gcov, [],
+				   [AC_MSG_ERROR([could not find __gcov_flush])])
+	fi
+fi
+
 if test "$with_openssl" = yes ; then
   dnl Order matters!
   if test "$PORTNAME" != "win32"; then
@@ -1650,6 +1657,8 @@ PGAC_CHECK_BUILTIN_FUNC([__builtin_clz], [unsigned int x])
 PGAC_CHECK_BUILTIN_FUNC([__builtin_ctz], [unsigned int x])
 PGAC_CHECK_BUILTIN_FUNC([__builtin_popcount], [unsigned int x])
 
+PGAC_CHECK_BUILTIN_FUNC0([__gcov_flush])
+
 AC_REPLACE_FUNCS(fseeko)
 case $host_os in
 	# NetBSD uses a custom fseeko/ftello built on fsetpos/fgetpos
-- 
2.20.1