diff -Nur libdv-0.5.orig/configure.in libdv-0.5/configure.in
--- libdv-0.5.orig/configure.in	Wed Feb 14 18:44:49 2001
+++ libdv-0.5/configure.in	Sat Mar 10 19:57:00 2001
@@ -17,7 +17,7 @@
 
 dnl Add -Wall if gcc
 if test "$GCC" = "yes"; then
-   CFLAGS="-Wall -O2"
+   CFLAGS="$CFLAGS -Wall"
 fi