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authorDan Nicholson <dbn.lists@gmail.com>2007-10-31 09:47:39 -0700
committerDan Nicholson <dbn.lists@gmail.com>2007-11-01 10:56:01 -0700
commit00e7dd8a1387155f73030b2ab28902ecf031e6e0 (patch)
tree2e025b3c9b9fe844e92f67841f09b57aff5719d4
parentd11b375b16d2d16cf324777aa854ea3222ac89a2 (diff)
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. (cherry picked from commit 013dbcd6111bc880e65ed00a7ca31e19230a81d5)
Diffstat
-rw-r--r--configs/linux4
-rw-r--r--configs/linux-alpha4
-rw-r--r--configs/linux-alpha-static3
-rw-r--r--configs/linux-directfb4
-rw-r--r--configs/linux-dri3
-rw-r--r--configs/linux-dri-xcb3
-rw-r--r--configs/linux-fbdev3
-rw-r--r--configs/linux-glide3
-rw-r--r--configs/linux-indirect3
-rw-r--r--configs/linux-osmesa3
-rw-r--r--configs/linux-osmesa163
-rw-r--r--configs/linux-osmesa16-static3
-rw-r--r--configs/linux-osmesa323
-rw-r--r--configs/linux-solo3
-rw-r--r--configs/linux-x86-glide3
15 files changed, 48 insertions, 0 deletions
diff --git a/configs/linux b/configs/linux
index 0d455ff46a..15700a1a3b 100644
--- a/configs/linux
+++ b/configs/linux
@@ -28,6 +28,10 @@ CFLAGS = -Wall -Wmissing-prototypes $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) \
CXXFLAGS = -Wall $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(DEFINES) \
$(X11_INCLUDES)
+# Work around aliasing bugs - developers should comment this out
+CFLAGS += -fno-strict-aliasing
+CXXFLAGS += -fno-strict-aliasing
+
GLUT_CFLAGS = -fexceptions
EXTRA_LIB_PATH = -L/usr/X11R6/lib
diff --git a/configs/linux-alpha b/configs/linux-alpha
index d69aabb730..65bf0c2ab6 100644
--- a/configs/linux-alpha
+++ b/configs/linux-alpha
@@ -11,6 +11,10 @@ CFLAGS = -O3 -mcpu=ev5 -ansi -mieee -pedantic -fPIC -D_XOPEN_SOURCE -DUSE_XSHM
CXXFLAGS = -O3 -mcpu=ev5 -ansi -mieee -pedantic -fPIC -D_XOPEN_SOURCE
GLUT_CFLAGS = -fexceptions
+# Work around aliasing bugs - developers should comment this out
+CFLAGS += -fno-strict-aliasing
+CXXFLAGS += -fno-strict-aliasing
+
GL_LIB_DEPS = -L/usr/X11R6/lib -lX11 -lXext -lm -lpthread
GLUT_LIB_DEPS = -L$(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
diff --git a/configs/linux-alpha-static b/configs/linux-alpha-static
index 2a30af9b68..08ec2d177e 100644
--- a/configs/linux-alpha-static
+++ b/configs/linux-alpha-static
@@ -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
diff --git a/configs/linux-directfb b/configs/linux-directfb
index 09332f4808..2a9843e93c 100644
--- a/configs/linux-directfb
+++ b/configs/linux-directfb
@@ -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
diff --git a/configs/linux-dri b/configs/linux-dri
index 246b9ab70c..c40b5a6cd5 100644
--- a/configs/linux-dri
+++ b/configs/linux-dri
@@ -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 =
diff --git a/configs/linux-dri-xcb b/configs/linux-dri-xcb
index 1f233f07f5..69643718ad 100644
--- a/configs/linux-dri-xcb
+++ b/configs/linux-dri-xcb
@@ -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 =
diff --git a/configs/linux-fbdev b/configs/linux-fbdev
index e36d20a702..69d10127c8 100644
--- a/configs/linux-fbdev
+++ b/configs/linux-fbdev
@@ -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
diff --git a/configs/linux-glide b/configs/linux-glide
index 0a40521e1b..31475c81d8 100644
--- a/configs/linux-glide
+++ b/configs/linux-glide
@@ -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
diff --git a/configs/linux-indirect b/configs/linux-indirect
index bd33345ed7..17c7126e11 100644
--- a/configs/linux-indirect
+++ b/configs/linux-indirect
@@ -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 =
diff --git a/configs/linux-osmesa b/configs/linux-osmesa
index cc1fbbd109..163b145291 100644
--- a/configs/linux-osmesa
+++ b/configs/linux-osmesa
@@ -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
diff --git a/configs/linux-osmesa16 b/configs/linux-osmesa16
index 1fb0186d31..796fba1780 100644
--- a/configs/linux-osmesa16
+++ b/configs/linux-osmesa16
@@ -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
diff --git a/configs/linux-osmesa16-static b/configs/linux-osmesa16-static
index 6645504478..22f6851d32 100644
--- a/configs/linux-osmesa16-static
+++ b/configs/linux-osmesa16-static
@@ -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
diff --git a/configs/linux-osmesa32 b/configs/linux-osmesa32
index a1e5a358d6..12d0cb053d 100644
--- a/configs/linux-osmesa32
+++ b/configs/linux-osmesa32
@@ -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
diff --git a/configs/linux-solo b/configs/linux-solo
index a6cab8c9b3..4278ac7fa5 100644
--- a/configs/linux-solo
+++ b/configs/linux-solo
@@ -31,6 +31,9 @@ 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 =
diff --git a/configs/linux-x86-glide b/configs/linux-x86-glide
index f2f8aeea60..941efc1e59 100644
--- a/configs/linux-x86-glide
+++ b/configs/linux-x86-glide
@@ -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)
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 08:16:25 +0000