From 18f9424ed77c27411f73dfad2be8e3b4ad97001f Mon Sep 17 00:00:00 2001
From: Tor Lillqvist <tml@collabora.com>
Date: Tue, 12 Nov 2013 15:50:50 +0200
Subject: [PATCH] Turn on LTO for MSVC when optimising unless told not to
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Change-Id: Ifdb04238d02ff504bd517508851e93211d748b7d
Reviewed-on: https://gerrit.libreoffice.org/6652
Reviewed-by: Jesús Corrius <jcorrius@gmail.com>
Tested-by: Jesús Corrius <jcorrius@gmail.com>
---
 configure.ac | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/configure.ac b/configure.ac
index 875c434983c6..9544ab7bcfd1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2495,6 +2495,12 @@ COMPATH=`echo $COMPATH | $SED "s@/[[Bb]][[Ii]][[Nn]]\\\$@@"`
 # Set the ENABLE_LTO variable
 # ===================================================================
 AC_MSG_CHECKING([whether to use link-time optimization])
+if test $_os = WINNT -a "$WITH_MINGW" != yes -a -z "$enable_lto" -a \
+        \( -z "$enable_dbgutil" -o "$enable_dbgutil" = no \) -a \
+        \( -z "$enable_debug" -o "$enable_debug" = no \); then
+    # Turn on LTO for MSVC when optimising unless told not to
+    enable_lto=yes
+fi
 if test -n "$enable_lto" -a "$enable_lto" != "no"; then
     ENABLE_LTO="TRUE"
     AC_MSG_RESULT([yes])