* [PATCH v2] tools/lib/api: undefine _FORTIFY_SOURCE before setting it
@ 2015-04-21 23:19 Bobby Powers
0 siblings, 0 replies; only message in thread
From: Bobby Powers @ 2015-04-21 23:19 UTC (permalink / raw
To: linux-kbuild, Kernel development list
Cc: Bobby Powers, Peter Zijlstra, Paul Mackerras, Ingo Molnar,
Dirk Gouders, Arnaldo Carvalho de Melo, Jiri Olsa, Michal Marek
Some toolchains (like Hardened Gentoo) define _FORTIFY_SOURCE in the
built-in, default args. This causes perf builds to fail with:
<command-line>:0:0: error: "_FORTIFY_SOURCE" redefined [-Werror]
<built-in>: note: this is the location of the previous definition
cc1: all warnings being treated as errors
To avoid this, undefine _FORTIFY_SOURCE before (possibly
re-)defining it in tools/lib/api.
v2 applies cleanly on top of already pulled kbuild changes for 4.1-rc1.
Signed-off-by: Bobby Powers <bobbypowers@gmail.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
---
tools/lib/api/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/lib/api/Makefile b/tools/lib/api/Makefile
index d8fe29f..8bd9606 100644
--- a/tools/lib/api/Makefile
+++ b/tools/lib/api/Makefile
@@ -16,7 +16,7 @@ MAKEFLAGS += --no-print-directory
LIBFILE = $(OUTPUT)libapi.a
CFLAGS := $(EXTRA_WARNINGS) $(EXTRA_CFLAGS)
-CFLAGS += -ggdb3 -Wall -Wextra -std=gnu99 -Werror -O6 -D_FORTIFY_SOURCE=2 -fPIC
+CFLAGS += -ggdb3 -Wall -Wextra -std=gnu99 -Werror -O6 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fPIC
CFLAGS += -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
RM = rm -f
--
2.3.5
^ permalink raw reply related [flat|nested] only message in thread
only message in thread, other threads:[~2015-04-21 23:19 UTC | newest]
Thread overview: (only message) (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2015-04-21 23:19 [PATCH v2] tools/lib/api: undefine _FORTIFY_SOURCE before setting it Bobby Powers
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).