From 9ca40dcd4d0cad43d95a9a253fafaa9a9ba7de24 Mon Sep 17 00:00:00 2001
From: Michael Paquier <michael@paquier.xyz>
Date: Tue, 11 May 2021 10:43:05 +0900
Subject: [PATCH] Add support for LZ4 build in MSVC scripts

Since its introduction in bbe0a81, compression of table data supports
LZ4, but nothing had been done within the MSVC scripts to allow users to
build the code with this library.

This commit closes the gap by extending the MSVC scripts to be able to
build optionally with LZ4.  Getting libraries that can be used for
compilation and execution is possible as LZ4 can be compiled down to
MSVC 2010 using its source tarball.  MinGW may require extra efforts to
be able to work, and I have been able to test this only with MSVC, still
this is better than nothing to give users a way to test the feature on
Windows.

Author: Dilip Kumar
Reviewed-by: Michael Paquier
Discussion: https://postgr.es/m/YJPdNeF68XpwDDki@paquier.xyz
---
 doc/src/sgml/install-windows.sgml | 10 ++++++++++
 src/tools/msvc/Solution.pm        | 12 ++++++++++++
 src/tools/msvc/config_default.pl  |  1 +
 3 files changed, 23 insertions(+)

diff --git a/doc/src/sgml/install-windows.sgml b/doc/src/sgml/install-windows.sgml
index 64687b12e67..92087dba687 100644
--- a/doc/src/sgml/install-windows.sgml
+++ b/doc/src/sgml/install-windows.sgml
@@ -304,6 +304,16 @@ $ENV{MSBFLAGS}="/m";
      </para></listitem>
     </varlistentry>
 
+    <varlistentry>
+     <term><productname>LZ4</productname></term>
+     <listitem><para>
+      Required for supporting <productname>LZ4</productname> compression
+      method for compressing the table data. Binaries and source can be
+      downloaded from
+      <ulink url="https://github.com/lz4/lz4/releases"></ulink>.
+     </para></listitem>
+    </varlistentry>
+
     <varlistentry>
      <term><productname>OpenSSL</productname></term>
      <listitem><para>
diff --git a/src/tools/msvc/Solution.pm b/src/tools/msvc/Solution.pm
index 459579d312f..85af28fe0bd 100644
--- a/src/tools/msvc/Solution.pm
+++ b/src/tools/msvc/Solution.pm
@@ -535,6 +535,12 @@ sub GenerateFiles
 		$define{HAVE_LIBXSLT} = 1;
 		$define{USE_LIBXSLT}  = 1;
 	}
+	if ($self->{options}->{lz4})
+	{
+		$define{HAVE_LIBLZ4} = 1;
+		$define{HAVE_LZ4_H}  = 1;
+		$define{USE_LZ4}     = 1;
+	}
 	if ($self->{options}->{openssl})
 	{
 		$define{USE_OPENSSL} = 1;
@@ -1054,6 +1060,11 @@ sub AddProject
 		$proj->AddIncludeDir($self->{options}->{xslt} . '\include');
 		$proj->AddLibrary($self->{options}->{xslt} . '\lib\libxslt.lib');
 	}
+	if ($self->{options}->{lz4})
+	{
+		$proj->AddIncludeDir($self->{options}->{lz4} . '\include');
+		$proj->AddLibrary($self->{options}->{lz4} . '\lib\liblz4.lib');
+	}
 	if ($self->{options}->{uuid})
 	{
 		$proj->AddIncludeDir($self->{options}->{uuid} . '\include');
@@ -1165,6 +1176,7 @@ sub GetFakeConfigure
 	$cfg .= ' --with-uuid'          if ($self->{options}->{uuid});
 	$cfg .= ' --with-libxml'        if ($self->{options}->{xml});
 	$cfg .= ' --with-libxslt'       if ($self->{options}->{xslt});
+	$cfg .= ' --with-lz4'           if ($self->{options}->{lz4});
 	$cfg .= ' --with-gssapi'        if ($self->{options}->{gss});
 	$cfg .= ' --with-icu'           if ($self->{options}->{icu});
 	$cfg .= ' --with-tcl'           if ($self->{options}->{tcl});
diff --git a/src/tools/msvc/config_default.pl b/src/tools/msvc/config_default.pl
index 256878f5820..460c0375d4b 100644
--- a/src/tools/msvc/config_default.pl
+++ b/src/tools/msvc/config_default.pl
@@ -14,6 +14,7 @@ our $config = {
 	extraver  => undef,    # --with-extra-version=<string>
 	gss       => undef,    # --with-gssapi=<path>
 	icu       => undef,    # --with-icu=<path>
+	lz4       => undef,    # --with-lz4=<path>
 	nls       => undef,    # --enable-nls=<path>
 	tap_tests => undef,    # --enable-tap-tests
 	tcl       => undef,    # --with-tcl=<path>