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win32, dos: Work around a bug in the GNU toolchain. 

The bug[1] is exposed when gcc decides to put some data in a common
section (i.e. data that will be used by more than one object). It will
suggest the data to be aligned, but binutils >= 2.19 will fail to
properly align it. Thus if the data requires any alignment greater
than 4, the application will crash.
The workaround prevents gcc from putting data in a common section,
instead putting it in a properly aligned section.

[1] http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37216

Originally committed as revision 18501 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ramiro Polla 2009-04-13 22:54:21 +00:00
parent c573eb85f0
commit 1894e741f5
1 changed files with 3 additions and 0 deletions
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3
configure vendored
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@ -1634,6 +1634,7 @@ case $target_os in
SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
objformat="win32"
enable dos_paths
check_cflags -fno-common
if ! enabled x86_64; then
check_cpp_condition _mingw.h "(__MINGW32_MAJOR_VERSION > 3) || (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
die "ERROR: MinGW runtime version must be >= 3.15."
@ -1652,6 +1653,7 @@ case $target_os in
SHFLAGS='-shared -Wl,--enable-auto-image-base'
objformat="win32"
enable dos_paths
check_cflags -fno-common
;;
*-dos|freedos|opendos)
disable ffplay ffserver
@ -1659,6 +1661,7 @@ case $target_os in
network_extralibs="-lsocket"
objformat="coff"
enable dos_paths
check_cflags -fno-common
;;
linux)
enable dv1394