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Add -fno-strict-aliasing workaround for Linux GCC targets

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Most Linux distros work around aliasing problems in Mesa by compiling
with the GCC option -fno-strict-aliasing. Two examples:

  https://bugs.freedesktop.org/show_bug.cgi?id=6046
  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=394311

This makes -fno-strict-aliasing the default with a comment that
developers should consider commenting it out. There is a already a note
about these bugs in docs/helpwanted.html.
This commit is contained in:
Dan Nicholson
2007-10-31 09:47:39 -07:00
parent 2bdd467dfd
commit 013dbcd611
15 changed files with 48 additions and 0 deletions
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configs/linux-directfb
+4
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@@ -13,6 +13,10 @@ CFLAGS = -Wall -O3 -ffast-math -fPIC -std=c99 -D_GNU_SOURCE -D_POSIX_SOURCE -D
CXXFLAGS = -Wall -O3 -fPIC -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE -D_BSD_SOURCE
# Work around aliasing bugs - developers should comment this out
CFLAGS += -fno-strict-aliasing
CXXFLAGS += -fno-strict-aliasing
HAVE_X86 = $(shell uname -m | grep 'i[3-6]86' >/dev/null && echo yes)
ifeq ($(HAVE_X86), yes)
CFLAGS += -DUSE_X86_ASM -DUSE_MMX_ASM -DUSE_3DNOW_ASM -DUSE_SSE_ASM