[SCM] libav/experimental: Add information about a workaround for MinGW gcc versions. based on a patch by Art Clarke, aclarke vlideshow com

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit 0f898714d7e7bf0ddc1c188d86a9761d183bd514
Author: Diego Biurrun <diego at biurrun.de>
Date:   Thu Oct 23 14:39:02 2008 +0000

    Add information about a workaround for MinGW gcc versions.
    based on a patch by Art Clarke, aclarke vlideshow com
    
    Originally committed as revision 15670 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/doc/general.texi b/doc/general.texi
index a6aa582..972c4e6 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -458,10 +458,13 @@ are listed below:
 @item mingw-runtime 3.15
 @end itemize
 
+You will also need to pass @code{-fno-common} to the compiler to work around
+a GCC bug (see @url{http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37216}).
+
 Within the MSYS shell, configure and make with:
 
 @example
-./configure --enable-memalign-hack
+./configure --enable-memalign-hack --extra-cflags=-fno-common
 make
 make install
 @end example

-- 
Libav/FFmpeg packaging