From 25b6e0369d88c3da0c630d185b0e8554b8afcfcf Mon Sep 17 00:00:00 2001
From: Bill Currie <bill@taniwha.org>
Date: Thu, 16 Nov 2023 19:11:47 +0900
Subject: [PATCH] [build] Enable link-time optimizations

They seem to make a small difference. I guess QF is currently well
enough organized that LTO just doesn't have enough to work with, though
I suspect that will change when I make more use of the ECS.
---
 config.d/compiling.m4 | 1 +
 1 file changed, 1 insertion(+)

diff --git a/config.d/compiling.m4 b/config.d/compiling.m4
index f5603bd25..c8ce1e3d5 100644
--- a/config.d/compiling.m4
+++ b/config.d/compiling.m4
@@ -158,6 +158,7 @@ AC_MSG_CHECKING(for optimization)
 if test "x$optimize" = xyes -a "x$leave_cflags_alone" != "xyes"; then
 	AC_MSG_RESULT(yes)
 	BUILD_TYPE="$BUILD_TYPE Optimize"
+	QF_CC_OPTION(-flto=auto)
 	if test "x$GCC" = xyes; then
 		saved_cflags="$CFLAGS"
 		dnl CFLAGS=""