1 files changed, 13 insertions, 0 deletions
diff --git a/aclocal.m4 b/aclocal.m4
index c5af789..e98a413 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -147,6 +147,19 @@ if test -z "$bird_cv_sys_linux_version" ; then
 fi
 ])])
 
+AC_DEFUN(BIRD_CHECK_GCC_OPTIONS,
+[AC_CACHE_VAL(bird_cv_c_option_no_pointer_sign, [
+cat >conftest.c <<EOF
+int main(void)
+{ return 0; }
+EOF
+if $CC -Wall -Wno-pointer-sign conftest.c >&AS_MESSAGE_LOG_FD 2>&1 ; then
+	bird_cv_c_option_no_pointer_sign=yes
+else
+	bird_cv_c_option_no_pointer_sign=no
+fi
+])])
+
 # BIRD_CHECK_PROG_FLAVOR_GNU(PROGRAM-PATH, IF-SUCCESS, [IF-FAILURE])
 # copied autoconf internal _AC_PATH_PROG_FLAVOR_GNU
 m4_define([BIRD_CHECK_PROG_FLAVOR_GNU],