From 1894e741f5a0cbc0818b0acbe0f7e45a22ab9107 Mon Sep 17 00:00:00 2001
From: Ramiro Polla <ramiro.polla@gmail.com>
Date: Mon, 13 Apr 2009 22:54:21 +0000
Subject: [PATCH] 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
---
configure | 3 +++
1 file changed, 3 insertions(+)
diff --git a/configure b/configure
index 4178044d97a..848839431e0 100755
--- a/configure
+++ b/configure
@@ -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
--
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