From 20924767e23ba489c27599e91eb80fc8935d603d Mon Sep 17 00:00:00 2001
From: Justin Pryzby <pryzbyj@telsasoft.com>
Date: Fri, 12 Mar 2021 15:35:40 -0600
Subject: [PATCH v9 6/9] Default to LZ4..

this is meant to exercise in the CIs, and not meant to be merged
---
 configure                         | 6 ++++--
 configure.ac                      | 4 ++--
 src/backend/access/transam/xlog.c | 2 +-
 src/backend/utils/misc/guc.c      | 2 +-
 4 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/configure b/configure
index e9b98f442f..7038b0727c 100755
--- a/configure
+++ b/configure
@@ -1575,7 +1575,7 @@ Optional Packages:
   --with-system-tzdata=DIR
                           use system time zone data in DIR
   --without-zlib          do not use Zlib
-  --with-lz4              build with LZ4 support
+  --without-lz4           build without LZ4 support
   --with-gnu-ld           assume the C compiler uses GNU ld [default=no]
   --with-ssl=LIB          use LIB for SSL/TLS support (openssl)
   --with-openssl          obsolete spelling of --with-ssl=openssl
@@ -8598,7 +8598,9 @@ $as_echo "#define USE_LZ4 1" >>confdefs.h
   esac
 
 else
-  with_lz4=no
+  with_lz4=yes
+
+$as_echo "#define USE_LZ4 1" >>confdefs.h
 
 fi
 
diff --git a/configure.ac b/configure.ac
index 3b42d8bdc9..cb0261f179 100644
--- a/configure.ac
+++ b/configure.ac
@@ -990,8 +990,8 @@ AC_SUBST(with_zlib)
 # LZ4
 #
 AC_MSG_CHECKING([whether to build with LZ4 support])
-PGAC_ARG_BOOL(with, lz4, no, [build with LZ4 support],
-              [AC_DEFINE([USE_LZ4], 1, [Define to 1 to build with LZ4 support. (--with-lz4)])])
+PGAC_ARG_BOOL(with, lz4, yes, [build without LZ4 support],
+              [AC_DEFINE([USE_LZ4], 1, [Define to 1 to build without LZ4 support. (--without-lz4)])])
 AC_MSG_RESULT([$with_lz4])
 AC_SUBST(with_lz4)
 
diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
index 3254c42243..f2b0af6360 100644
--- a/src/backend/access/transam/xlog.c
+++ b/src/backend/access/transam/xlog.c
@@ -98,7 +98,7 @@ char	   *XLogArchiveCommand = NULL;
 bool		EnableHotStandby = false;
 bool		fullPageWrites = true;
 bool		wal_log_hints = false;
-int		wal_compression = WAL_COMPRESSION_ZLIB;
+int		wal_compression = WAL_COMPRESSION_LZ4;
 char	   *wal_consistency_checking_string = NULL;
 bool	   *wal_consistency_checking = NULL;
 bool		wal_init_zero = true;
diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index 14a2203225..0ad62e4d1f 100644
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -4822,7 +4822,7 @@ static struct config_enum ConfigureNamesEnum[] =
 			NULL
 		},
 		&wal_compression,
-		WAL_COMPRESSION_ZLIB, wal_compression_options,
+		WAL_COMPRESSION_LZ4, wal_compression_options,
 		NULL, NULL, NULL
 	},
 
-- 
2.17.0