[SCM] libav/experimental: fix extern prefix detection on mingw

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit 2081f3c619a365da56a3192d1691662602e08468
Author: Måns Rullgård <mans at mansr.com>
Date:   Tue Mar 18 09:36:29 2008 +0000

    fix extern prefix detection on mingw
    
    Originally committed as revision 12485 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/configure b/configure
index 16860d2..ac46aeb 100755
--- a/configure
+++ b/configure
@@ -1494,7 +1494,7 @@ fi
 check_cc <<EOF || die "Symbol mangling check failed."
 int ff_extern;
 EOF
-sym=$(nm -P $TMPO)
+sym=$(nm -P -g $TMPO)
 extern_prefix=${sym%%ff_extern*}
 
 check_asm inline_asm '""'

-- 
Libav/FFmpeg packaging