/* Common definitions.
- Copyright (C) 1986-2018 Free Software Foundation, Inc.
+ Copyright (C) 1986-2019 Free Software Foundation, Inc.
This file is part of GDB.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
-#ifndef COMMON_DEFS_H
-#define COMMON_DEFS_H
+#ifndef COMMON_COMMON_DEFS_H
+#define COMMON_COMMON_DEFS_H
#include "config.h"
#define __STDC_LIMIT_MACROS 1
#define __STDC_FORMAT_MACROS 1
+/* Some distros enable _FORTIFY_SOURCE by default, which on occasion
+ has caused build failures with -Wunused-result when a patch is
+ developed on a distro that does not enable _FORTIFY_SOURCE. We
+ enable it here in order to try to catch these problems earlier;
+ plus this seems like a reasonable safety measure. The check for
+ optimization is required because _FORTIFY_SOURCE only works when
+ optimization is enabled. If _FORTIFY_SOURCE is already defined,
+ then we don't do anything. */
+
+#if !defined _FORTIFY_SOURCE && defined __OPTIMIZE__ && __OPTIMIZE__ > 0
+#define _FORTIFY_SOURCE 2
+#endif
+
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#undef ATTRIBUTE_PRINTF
#define ATTRIBUTE_PRINTF _GL_ATTRIBUTE_FORMAT_PRINTF
+#if GCC_VERSION >= 3004
+#define ATTRIBUTE_UNUSED_RESULT __attribute__ ((__warn_unused_result__))
+#else
+#define ATTRIBUTE_UNUSED_RESULT
+#endif
+
#include "libiberty.h"
#include "pathmax.h"
#include "gdb/signals.h"
#define HAVE_USEFUL_SBRK 1
#endif
-#endif /* COMMON_DEFS_H */
+#endif /* COMMON_COMMON_DEFS_H */