[PATCH libXpm] config: add -fno-strict-aliasing now that it is out of $CWARNFLAGS

[Gaetan Nadon]

This patch will ensure the modules continues to suppress the
optimization, based on strict aliasing rules, after the option
is removed from $CWARNFLAGS. There is no change in the object
code produced.

There is no attempt to determine if the module should or should not
have such an optimization. A new warning (-Wstrict-aliasing=2)
has been added to the XORG_CWARNFLAGS macro to help  find code
that may interfere with optimization.
---
 cxpm/Makefile.am |    2 +-
 src/Makefile.am  |    2 +-
 sxpm/Makefile.am |    2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/cxpm/Makefile.am b/cxpm/Makefile.am
index 42cd49d..eac17f3 100644
--- a/cxpm/Makefile.am
+++ b/cxpm/Makefile.am
@@ -1,7 +1,7 @@
 bin_PROGRAMS = cxpm
 
 AM_CPPFLAGS = -I$(top_srcdir)/src -I$(top_srcdir)/include/X11
-AM_CFLAGS = $(CWARNFLAGS) $(XPM_CFLAGS)
+AM_CFLAGS = $(CWARNFLAGS) -fno-strict-aliasing $(XPM_CFLAGS)
 
 cxpm_SOURCES = cxpm.c
 
diff --git a/src/Makefile.am b/src/Makefile.am
index 0c8652a..e4b059f 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -3,7 +3,7 @@
 lib_LTLIBRARIES=libXpm.la
 
 AM_CPPFLAGS = -I. -I$(top_srcdir)/include/X11/
-AM_CFLAGS = $(CWARNFLAGS) $(XPM_CFLAGS)
+AM_CFLAGS = $(CWARNFLAGS) -fno-strict-aliasing $(XPM_CFLAGS)
 
 libXpm_la_LDFLAGS = -version-number 4:11:0 -no-undefined
 libXpm_la_LIBADD =  $(XPM_LIBS)
diff --git a/sxpm/Makefile.am b/sxpm/Makefile.am
index faa192c..312c820 100644
--- a/sxpm/Makefile.am
+++ b/sxpm/Makefile.am
@@ -2,7 +2,7 @@ if BUILD_SXPM
 
 bin_PROGRAMS = sxpm
 
-AM_CFLAGS = $(CWARNFLAGS) $(SXPM_CFLAGS)
+AM_CFLAGS = $(CWARNFLAGS) -fno-strict-aliasing $(SXPM_CFLAGS)
 
 AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_builddir)/include
 
-- 
1.6.0.4