--- ./ffmpeg/libavutil/eval.c.orig	2005-12-07 16:09:07.000000000 +0100
+++ ./ffmpeg/libavutil/eval.c	2005-12-07 16:11:59.000000000 +0100
@@ -182,6 +182,8 @@
     return ret;
 }
 
+#if 0
+// this is already defined in ffmpeg/libavcodec/eval.c
 double ff_eval(char *s, double *const_value, const char **const_name,
                double (**func1)(void *, double), const char **func1_name,
                double (**func2)(void *, double, double), char **func2_name,
@@ -200,6 +202,7 @@
     
     return evalExpression(&p);
 }
+#endif
 
 #ifdef TEST
 #undef printf