diff options
| -rw-r--r-- | m4/acinclude.m4 | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/m4/acinclude.m4 b/m4/acinclude.m4 index e601f0ed..294507e2 100644 --- a/m4/acinclude.m4 +++ b/m4/acinclude.m4 @@ -114,6 +114,10 @@ AC_DEFUN([CFLAGS_ADD], [AS_VAR_PUSHDEF([my_cflags], [cflags_cv_warn_$1])dnl AC_CACHE_CHECK([whether compiler handles $1], [my_cflags], [ save_CFLAGS="$CFLAGS" + CFLAGS="${CFLAGS} -Werror=unknown-warning-option" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])], + [], + [CFLAGS="$save_CFLAGS"]) CFLAGS="${CFLAGS} $1" AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])], [AS_VAR_SET([my_cflags], [yes])], |