[PATCH util-macros 1/2] Don't disable strict aliasing (-fno-strict-aliasing) globally

[Jeremy Huddleston]

Instead, we warn where this optimization might cause a problem!

This was included for historic reasons and has persisted to the point of now
infecting all X.org modules.  Historically, it was just present in these
modules before adding XORG_CWARNFLAGS to XORG_DEFAULT_OPTIONS:

libICE
libSM
libX11
libXau
libXfont
libXft
libXpm
libXres
xorg-server

Most of these modules probably don't even need to disable this optimization,
but if it is decided that this optimization should be disabled, it should be
restricted to the required module rather than a global option.

Signed-off-by: Jeremy Huddleston <jeremyhu at apple.com>
---
 xorg-macros.m4.in |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/xorg-macros.m4.in b/xorg-macros.m4.in
index caf61c2..40f5939 100644
--- a/xorg-macros.m4.in
+++ b/xorg-macros.m4.in
@@ -588,7 +588,7 @@ AC_DEFUN([XORG_CWARNFLAGS], [
 AC_REQUIRE([AC_PROG_CC])
 if  test "x$GCC" = xyes ; then
     CWARNFLAGS="-Wall -Wpointer-arith -Wstrict-prototypes -Wmissing-prototypes \
--Wmissing-declarations -Wnested-externs -fno-strict-aliasing \
+-Wmissing-declarations -Wnested-externs -Wstrict-aliasing=2 \
 -Wbad-function-cast"
     case `$CC -dumpversion` in
     3.4.* | 4.*)
-- 
1.6.2