This is the mail archive of the
gdb-cvs@sourceware.org
mailing list for the GDB project.
[binutils-gdb] Define _FORTIFY_SOURCE in common-defs.h
- From: Tom Tromey <tromey at sourceware dot org>
- To: gdb-cvs at sourceware dot org
- Date: 13 Aug 2018 16:02:36 -0000
- Subject: [binutils-gdb] Define _FORTIFY_SOURCE in common-defs.h
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=a97b53dda99526d7c2890aeb9637008790cbdfa9
commit a97b53dda99526d7c2890aeb9637008790cbdfa9
Author: Tom Tromey <tom@tromey.com>
Date: Fri Aug 10 09:03:47 2018 -0600
Define _FORTIFY_SOURCE in common-defs.h
This defines _FORTIFY_SOURCE in common-defs.h. This seems like a
sensible safety measure, and also it may help avoid build problems
with -Wunused-result on distros that already define _FORTIFY_SOURCE by
default.
Tested by the buildbot.
gdb/ChangeLog
2018-08-13 Tom Tromey <tom@tromey.com>
* common/common-defs.h (_FORTIFY_SOURCE): Define.
Diff:
---
gdb/ChangeLog | 4 ++++
gdb/common/common-defs.h | 12 ++++++++++++
2 files changed, 16 insertions(+)
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 0e1848c..37ab81b 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2018-08-13 Tom Tromey <tom@tromey.com>
+
+ * common/common-defs.h (_FORTIFY_SOURCE): Define.
+
2018-08-13 Alan Hayward <alan.hayward@arm.com>
* aarch64-linux-tdep.c (aarch64_linux_supply_sve_regset): New function.
diff --git a/gdb/common/common-defs.h b/gdb/common/common-defs.h
index 80f1ff4..58445b1 100644
--- a/gdb/common/common-defs.h
+++ b/gdb/common/common-defs.h
@@ -59,6 +59,18 @@
#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 defined __OPTIMIZE__ && __OPTIMIZE__ > 0
+#define _FORTIFY_SOURCE 2
+#endif
+
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>