summaryrefslogtreecommitdiffstats
path: root/m4/fr_have_bounded_attribute.m4
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--m4/fr_have_bounded_attribute.m426
1 files changed, 26 insertions, 0 deletions
diff --git a/m4/fr_have_bounded_attribute.m4 b/m4/fr_have_bounded_attribute.m4
new file mode 100644
index 0000000..50c3305
--- /dev/null
+++ b/m4/fr_have_bounded_attribute.m4
@@ -0,0 +1,26 @@
+dnl #
+dnl # Check if we have __attribute__((__bounded__)) (usually only OpenBSD with GCC)
+dnl #
+AC_DEFUN([FR_HAVE_BOUNDED_ATTRIBUTE],[
+ AC_CACHE_CHECK([for __attribute__((__bounded__)) support in compiler], [ax_cv_cc_bounded_attribute],[
+ CFLAGS_SAVED=$CFLAGS
+ CFLAGS="$CFLAGS -Werror"
+ AC_RUN_IFELSE(
+ [
+ AC_LANG_SOURCE([
+ void test(char *buff) __attribute__ ((__bounded__ (__string__, 1, 1)));
+ int main(int argc, char **argv) {
+ if ((argc < 0) || !argv) return 1; /* -Werror=unused-parameter */
+ return 0;
+ }
+ ])
+ ],
+ [ax_cv_cc_bounded_attribute=yes],
+ [ax_cv_cc_bounded_attribute=no]
+ )
+ CFLAGS="$CFLAGS_SAVED"
+ ])
+ if test "x$ax_cv_cc_bounded_attribute" = "xyes"; then
+ AC_DEFINE(HAVE_ATTRIBUTE_BOUNDED, 1, [Define if your compiler supports the __bounded__ attribute (usually OpenBSD gcc).])
+ fi
+])