Index: gnusound-0.7.5/configure.ac
===================================================================
--- gnusound-0.7.5.orig/configure.ac	2009-03-31 01:09:42.000000000 +0200
+++ gnusound-0.7.5/configure.ac	2009-03-31 01:11:55.000000000 +0200
@@ -183,7 +183,7 @@
 AC_CHECK_HEADER([ffmpeg/avformat.h],
   [AC_CHECK_LIB([avformat], [av_open_input_file],
     [AC_DEFINE(HAVE_FFMPEG)
-     echo "-lavformat -lavcodec -lavutil -lm $use" > ${module_path}/.file_ffmpeg.cflags
+     pkg-config --libs libavcodec libavformat libavutil > ${module_path}/.file_ffmpeg.cflags
      file_drivers="ffmpeg $file_drivers"], 
     [echo > ${module_path}/.file_ffmpeg.cflags], [-lavcodec -lavutil -lm])])
 
