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Diffstat (limited to '')
| -rw-r--r-- | m4/fr_have_bounded_attribute.m4 | 26 |
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 +]) |