--- /dev/null
+--- libmpeg2-0.5.1/configure.ac~ 2009-07-09 10:07:51.000000000 +0200
++++ libmpeg2-0.5.1/configure.ac 2009-07-09 10:08:42.000000000 +0200
+@@ -76,13 +76,15 @@
+ for TRY_CFLAGS in "-mpim-altivec -force_cpusubtype_ALL" -faltivec -maltivec -fvec; do
+ AC_TRY_CFLAGS([$OPT_CFLAGS $TRY_CFLAGS $CFLAGS],
+ [save_CFLAGS="$CFLAGS"
+- CFLAGS="$OPT_CFLAGS $TRY_CFLAGS $CFLAGS"
++ CFLAGS="$OPT_CFLAGS $TRY_CFLAGS $CFLAGS -Werror"
+ AC_MSG_CHECKING([if <altivec.h> is needed])
+ AC_TRY_COMPILE([],
+ [typedef vector int t;
+ vec_ld(0, (unsigned char *)0);],
+ [have_altivec=yes; AC_MSG_RESULT(no)],
+- [AC_TRY_COMPILE([#include <altivec.h>],
++ [CFLAGS="$save_CFLAGS"
++ CFLAGS="$OPT_CFLAGS $TRY_CFLAGS $CFLAGS"
++ AC_TRY_COMPILE([#include <altivec.h>],
+ [typedef vector int t; vec_ld(0, (unsigned char *)0);],
+ [AC_DEFINE([HAVE_ALTIVEC_H],,
+ [Define to 1 if you have the <altivec.h> header.])