[git commit nptl_merge] build with -fmerge-all-constants

[Mike Frysinger]

commit: http://git.uclibc.org/uClibc/commit/?id=5a4c1b737f10317b168170094a07f3df2e181816
branch: http://git.uclibc.org/uClibc/commit/?id=refs/heads/nptl_merge

Glibc is already using this flag and it gives us a slight code shrink in
a few functions.

Signed-off-by: Mike Frysinger <vapier at gentoo.org>
---
 Rules.mak |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/Rules.mak b/Rules.mak
index e63f6a4..7b59350 100644
--- a/Rules.mak
+++ b/Rules.mak
@@ -175,6 +175,8 @@ OPTIMIZATION:=
 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
 # Use the gcc 3.4 -funit-at-a-time optimization when available
 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
+# shrinks code by about 0.1%
+OPTIMIZATION+=$(call check_gcc,-fmerge-all-constants)
 
 GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
 #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2)
-- 
1.6.3.3