From: Sergei Trofimovich <sly...@gentoo.org>
Gentoo's toolchain sets _FORTIFY_SOURCE by default
which leads to very obscure error:
perf # make clean && make
Makefile:455: No libdw.h found or old libdw.h found or elfutils is older than
0.138, disables dwarf support. Please install new elfutils-devel/libdw-dev
Makefile:470: *** No gnu/libc-version.h found, please install
glibc-dev[el]/glibc-static. Stop
Patch explicitely undefines _FORTIFY_SOURCE. Thanks!
CC: Peter Zijlstra <a.p.zijls...@chello.nl>
CC: Paul Mackerras <pau...@samba.org>
CC: Ingo Molnar <mi...@redhat.com>
CC: Arnaldo Carvalho de Melo <a...@ghostprotocols.net>
Signed-off-by: Sergei Trofimovich <sly...@gentoo.org>
---
tools/perf/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 891bc77..60f083d 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -94,7 +94,7 @@ ifeq ("$(origin DEBUG)", "command line")
PERF_DEBUG = $(DEBUG)
endif
ifndef PERF_DEBUG
- CFLAGS_OPTIMIZE = -O6 -D_FORTIFY_SOURCE=2
+ CFLAGS_OPTIMIZE = -O6 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
endif
ifdef PARSER_DEBUG
--
1.8.0
--
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