From 67bf5cb1a34c7dcb4081254a859bf82421be1d48 Mon Sep 17 00:00:00 2001
From: Dan Williams <dcbw@redhat.com>
Date: Tue, 2 Dec 2014 12:41:20 -0600
Subject: [PATCH] build: add --enable-lto to enable Link Time Optimization (bgo
 #741140)

Takes about 3x as long to build with gcc 4.8, but gcc 4.9
is supposed to speed that up considerably.

Name           Before   After   Saved
-------------------------------------
NetworkManager  1734744  1689728   3%
libnm           1263536   808816  36%
nm-iface-helper  931136   906496   3%
libnm-util       441264   437168   1%
libnm-glib       297064   292960   2%

https://bugzilla.gnome.org/show_bug.cgi?id=741140
---
 configure.ac | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/configure.ac b/configure.ac
index afc55defa1..c1c8fde83f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -821,6 +821,13 @@ AM_CONDITIONAL(BUILD_NMTUI, test "$build_nmtui" = yes)
 
 NM_COMPILER_WARNINGS
 
+AC_ARG_ENABLE(lto, AS_HELP_STRING([--enable-lto], [Enable Link Time Optimization for smaller size (default: no)]),
+              [enable_lto=yes], [enable_lto=no])
+if (test "${enable_lto}" = "yes"); then
+    CFLAGS="-flto $CFLAGS"
+fi
+
+
 dnl -------------------------
 dnl Vala bindings
 dnl -------------------------
@@ -1070,4 +1077,5 @@ echo "  documentation: $enable_gtk_doc"
 echo "  tests: $enable_tests"
 echo "  valgrind: $with_valgrind"
 echo "  code coverage: $enable_code_coverage"
+echo "  LTO: $enable_lto"
 echo