* configure.ac: fixed the AltiVec capabilities check.

diff --git a/configure.ac b/configure.ac
index 1cf3746825d05d601eefecbb6dab643e1623fcef..e51768a2a12e3cd756023abc16d8c08b09d20d6a 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1066,7 +1066,7 @@ AC_CACHE_CHECK([if \$CC groks AltiVec C extensions],
        [vec_ld(0, (unsigned char *)0);],
        [ac_cv_c_altivec="-faltivec"],
        [# Linux/PPC test (no flags)
-        CFLAGS="${CFLAGS_save} ${CFLAGS_idctaltivec}"
+        CFLAGS="${CFLAGS_save} ${CFLAGS_idctaltivec} -Werror"
         AC_TRY_COMPILE([#ifdef HAVE_ALTIVEC_H
                         #include <altivec.h>
                         #endif],