Messages in this thread Patch in this message | | | From | Arnaldo Carvalho de Melo <> | Subject | [PATCH 3/8] perf tools: check if -DFORTIFY_SOURCE=2 is allowed | Date | Thu, 14 Mar 2013 09:23:10 -0300 |
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From: Marcin Slusarz <marcin.slusarz@gmail.com>
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> --- tools/perf/Makefile | 8 +++++++- 1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/tools/perf/Makefile b/tools/perf/Makefile index a2108ca..bb74c79 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),) -- 1.7.1
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