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build: add --enable-lto to enable Link Time Optimization (bgo #741140)

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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
This commit is contained in:
Dan Williams 2014-12-02 12:41:20 -06:00
parent 53380159dd
commit 67bf5cb1a3
1 changed files with 8 additions and 0 deletions
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8
configure.ac
View file

@ -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