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Add -fno-strict-aliasing workaround for Linux GCC targets
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.tags/mesa_7_1_rc1
Dan Nicholson
19 years ago
15 changed files with 48 additions and 0 deletions
+ 4
- 0
configs/linux
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| @@ -28,6 +28,10 @@ CFLAGS = -Wall -Wmissing-prototypes $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) \ | |||
| CXXFLAGS = -Wall $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(DEFINES) \ | |||
| $(X11_INCLUDES) | |||
| # Work around aliasing bugs - developers should comment this out | |||
| CFLAGS += -fno-strict-aliasing | |||
| CXXFLAGS += -fno-strict-aliasing | |||
| GLUT_CFLAGS = -fexceptions | |||
| EXTRA_LIB_PATH = -L/usr/X11R6/lib | |||
+ 4
- 0
configs/linux-alpha
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| @@ -11,6 +11,10 @@ CFLAGS = -O3 -mcpu=ev5 -ansi -mieee -pedantic -fPIC -D_XOPEN_SOURCE -DUSE_XSHM | |||
| CXXFLAGS = -O3 -mcpu=ev5 -ansi -mieee -pedantic -fPIC -D_XOPEN_SOURCE | |||
| GLUT_CFLAGS = -fexceptions | |||
| # Work around aliasing bugs - developers should comment this out | |||
| CFLAGS += -fno-strict-aliasing | |||
| CXXFLAGS += -fno-strict-aliasing | |||
| GL_LIB_DEPS = -L/usr/X11R6/lib -lX11 -lXext -lm -lpthread | |||
| GLUT_LIB_DEPS = -L$(TOP)/$(LIB_DIR) -l$(GLU_LIB) -l$(GL_LIB) -L/usr/X11R6/lib -lX11 -lXmu -lXt -lXi -lm | |||
| GLW_LIB_DEPS = -L$(TOP)/$(LIB_DIR) -l$(GL_LIB) -L/usr/X11R6/lib -lXt -lX11 | |||
+ 3
- 0
configs/linux-alpha-static
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| @@ -12,6 +12,9 @@ CXXFLAGS = -O3 -mcpu=ev5 -ansi -mieee -pedantic -D_XOPEN_SOURCE | |||
| GLUT_CFLAGS = -fexceptions | |||
| MKLIB_OPTIONS = -static | |||
| # Work around aliasing bugs - developers should comment this out | |||
| CFLAGS += -fno-strict-aliasing | |||
| CXXFLAGS += -fno-strict-aliasing | |||
| # Library names (actual file names) | |||
| GL_LIB_NAME = libGL.a | |||
+ 4
- 0
configs/linux-directfb
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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 | |||
+ 3
- 0
configs/linux-dri
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| @@ -32,6 +32,9 @@ CFLAGS = -Wall -Wmissing-prototypes -std=c99 -ffast-math \ | |||
| CXXFLAGS = -Wall $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(DEFINES) | |||
| # Work around aliasing bugs - developers should comment this out | |||
| CFLAGS += -fno-strict-aliasing | |||
| CXXFLAGS += -fno-strict-aliasing | |||
| ASM_SOURCES = | |||
+ 3
- 0
configs/linux-dri-xcb
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| @@ -32,6 +32,9 @@ CFLAGS = -Wall -Wmissing-prototypes $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) \ | |||
| CXXFLAGS = -Wall $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(DEFINES) | |||
| # Work around aliasing bugs - developers should comment this out | |||
| CFLAGS += -fno-strict-aliasing | |||
| CXXFLAGS += -fno-strict-aliasing | |||
| ASM_SOURCES = | |||
+ 3
- 0
configs/linux-fbdev
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| @@ -6,6 +6,9 @@ CONFIG_NAME = linux-fbdev | |||
| CFLAGS = -O3 -ffast-math -ansi -pedantic -fPIC -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE -D_BSD_SOURCE -DPTHREADS -DUSE_GLFBDEV_DRIVER | |||
| # Work around aliasing bugs - developers should comment this out | |||
| CFLAGS += -fno-strict-aliasing | |||
| SRC_DIRS = mesa glu glut/fbdev | |||
| DRIVER_DIRS = fbdev osmesa | |||
| PROGRAM_DIRS = fbdev demos redbook samples | |||
+ 3
- 0
configs/linux-glide
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| @@ -12,6 +12,9 @@ CFLAGS = -O3 -ansi -pedantic -fPIC -ffast-math -D_POSIX_SOURCE -D_POSIX_C_SOURCE | |||
| CXXFLAGS = -O3 -ansi -pedantic -fPIC -ffast-math -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE -D_BSD_SOURCE | |||
| GLUT_CFLAGS = -fexceptions | |||
| # Work around aliasing bugs - developers should comment this out | |||
| CFLAGS += -fno-strict-aliasing | |||
| CXXFLAGS += -fno-strict-aliasing | |||
| # Library/program dependencies | |||
| GL_LIB_DEPS = -L/usr/X11R6/lib -lX11 -lXext -L/usr/local/glide/lib -lglide3x -lm -lpthread | |||
+ 3
- 0
configs/linux-indirect
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| @@ -33,6 +33,9 @@ CFLAGS = $(WARN_FLAGS) $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(DEFINES) \ | |||
| CXXFLAGS = $(WARN_FLAGS) $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(DEFINES) | |||
| # Work around aliasing bugs - developers should comment this out | |||
| CFLAGS += -fno-strict-aliasing | |||
| CXXFLAGS += -fno-strict-aliasing | |||
| ASM_SOURCES = | |||
+ 3
- 0
configs/linux-osmesa
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| @@ -12,6 +12,9 @@ CXX = g++ | |||
| CFLAGS = -O3 -ansi -pedantic -fPIC -ffast-math -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE -D_BSD_SOURCE -DPTHREADS | |||
| CXXFLAGS = -O3 -ansi -pedantic -fPIC -ffast-math -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 | |||
| # Directories | |||
| SRC_DIRS = mesa glu | |||
+ 3
- 0
configs/linux-osmesa16
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| @@ -10,6 +10,9 @@ CXX = g++ | |||
| CFLAGS = -O3 -ansi -pedantic -fPIC -ffast-math -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE -D_BSD_SOURCE -DUSE_XSHM -DPTHREADS -I/usr/X11R6/include -DCHAN_BITS=16 -DDEFAULT_SOFTWARE_DEPTH_BITS=31 | |||
| CXXFLAGS = -O3 -ansi -pedantic -fPIC -ffast-math -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 | |||
| # Library names | |||
| OSMESA_LIB = OSMesa16 | |||
+ 3
- 0
configs/linux-osmesa16-static
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| @@ -11,6 +11,9 @@ CFLAGS = -O3 -ansi -pedantic -ffast-math -D_POSIX_SOURCE -D_POSIX_C_SOURCE=19930 | |||
| CXXFLAGS = -O3 -ansi -pedantic -ffast-math -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE -D_BSD_SOURCE | |||
| MKLIB_OPTIONS = -static | |||
| # Work around aliasing bugs - developers should comment this out | |||
| CFLAGS += -fno-strict-aliasing | |||
| CXXFLAGS += -fno-strict-aliasing | |||
| # Library names | |||
| OSMESA_LIB = OSMesa16 | |||
+ 3
- 0
configs/linux-osmesa32
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| @@ -10,6 +10,9 @@ CXX = g++ | |||
| CFLAGS = -O3 -ansi -pedantic -fPIC -ffast-math -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE -D_BSD_SOURCE -DUSE_XSHM -DPTHREADS -I/usr/X11R6/include -DCHAN_BITS=32 -DDEFAULT_SOFTWARE_DEPTH_BITS=31 | |||
| CXXFLAGS = -O3 -ansi -pedantic -fPIC -ffast-math -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 | |||
| # Library names | |||
| OSMESA_LIB = OSMesa32 | |||
+ 3
- 0
configs/linux-solo
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| @@ -32,6 +32,9 @@ CFLAGS = $(WARN_FLAGS) $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(DEFINES) \ | |||
| CXXFLAGS = $(WARN_FLAGS) $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(DEFINES) | |||
| # Work around aliasing bugs - developers should comment this out | |||
| CFLAGS += -fno-strict-aliasing | |||
| CXXFLAGS += -fno-strict-aliasing | |||
| ASM_SOURCES = | |||
+ 3
- 0
configs/linux-x86-glide
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| @@ -14,6 +14,9 @@ CXXFLAGS = -Wall -O3 -ansi -pedantic -fPIC -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199 | |||
| GLUT_CFLAGS = -fexceptions | |||
| # Work around aliasing bugs - developers should comment this out | |||
| CFLAGS += -fno-strict-aliasing | |||
| CXXFLAGS += -fno-strict-aliasing | |||
| ASM_SOURCES = $(X86_SOURCES) | |||
| ASM_API = $(X86_API) | |||
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