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| author | Marcin Slusarz <marcin.slusarz@gmail.com> | 2013-02-17 16:03:36 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-03-13 16:57:27 -0300 |
| commit | d2f32479e5526a1ab3b4e43910fcb279871524ce (patch) | |
| tree | 39c0d91b56d7d783b7b8118c8a246a6c291e90a0 /tools/perf | |
| parent | 5f7439e07822942f32b9e0a66f4a3cc9c3e29e67 (diff) | |
| download | lwn-d2f32479e5526a1ab3b4e43910fcb279871524ce.tar.gz lwn-d2f32479e5526a1ab3b4e43910fcb279871524ce.zip | |
perf tools: check if -DFORTIFY_SOURCE=2 is allowed
It seems gcc (4.7.2) defines _FORTIFY_SOURCE internally and becomes
confused when it sees another definition in flags.
For me, build failed like this:
CHK glibc
Makefile:548: *** No gnu/libc-version.h found, please install glibc-dev[el]/glibc-static. Stop.
and only with V=1 it printed:
<command-line>:0:0: error: "_FORTIFY_SOURCE" redefined [-Werror]
<stdin>:1:0: note: this is the location of the previous definition
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1361113416-8662-1-git-send-email-marcin.slusarz@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/Makefile | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/tools/perf/Makefile b/tools/perf/Makefile index a2108ca1cc17..bb74c79cd16e 100644 --- a/tools/perf/Makefile +++ b/tools/perf/Makefile @@ -95,7 +95,7 @@ ifeq ("$(origin DEBUG)", "command line") PERF_DEBUG = $(DEBUG) endif ifndef PERF_DEBUG - CFLAGS_OPTIMIZE = -O6 -D_FORTIFY_SOURCE=2 + CFLAGS_OPTIMIZE = -O6 endif ifdef PARSER_DEBUG @@ -180,6 +180,12 @@ ifeq ($(call try-cc,$(SOURCE_HELLO),$(CFLAGS) -Werror -Wvolatile-register-var,-W CFLAGS := $(CFLAGS) -Wvolatile-register-var endif +ifndef PERF_DEBUG + ifeq ($(call try-cc,$(SOURCE_HELLO),$(CFLAGS) -D_FORTIFY_SOURCE=2,-D_FORTIFY_SOURCE=2),y) + CFLAGS := $(CFLAGS) -D_FORTIFY_SOURCE=2 + endif +endif + ### --- END CONFIGURATION SECTION --- ifeq ($(srctree),) |