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Commit 5d7bdab7 authored by Michael Cree's avatar Michael Cree Committed by Ingo Molnar
Browse files

perf tools: Test -fstack-protector-all compiler option for inclusion in CFLAGS 



Some architectures (e.g. Alpha) do not support the
-fstack-protector-all compiler option and the use of the option
with -Werror causes the compiler to abort and the build fails.

Test that the compiler supports -fstack-protector-all before
inclusion in CFLAGS.

Signed-off-by: default avatarMichael Cree <mcree@orcon.net.nz>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <20091111074302.GA3728@omega>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 9e827dd0

tools/perf/Makefile

+4 −1
Original line number Diff line number Diff line
@@ -207,7 +207,7 @@ ifndef PERF_DEBUG 
  CFLAGS_OPTIMIZE = -O6

endif



CFLAGS = $(MBITS) -ggdb3 -Wall -Wextra -std=gnu99 -Werror $(CFLAGS_OPTIMIZE) -fstack-protector-all -D_FORTIFY_SOURCE=2 $(EXTRA_WARNINGS)

CFLAGS = $(MBITS) -ggdb3 -Wall -Wextra -std=gnu99 -Werror $(CFLAGS_OPTIMIZE) -D_FORTIFY_SOURCE=2 $(EXTRA_WARNINGS)

LDFLAGS = -lpthread -lrt -lelf -lm

ALL_CFLAGS = $(CFLAGS)

ALL_LDFLAGS = $(LDFLAGS)
@@ -259,6 +259,9 @@ PTHREAD_LIBS = -lpthread 
# explicitly what architecture to check for. Fix this up for yours..

SPARSE_FLAGS = -D__BIG_ENDIAN__ -D__powerpc__



ifeq ($(shell sh -c "echo 'int foo(void) {char X[2]; return 3;}' | $(CC) -x c -c -Werror -fstack-protector-all - -o /dev/null >/dev/null 2>&1 && echo y"), y)

  CFLAGS := $(CFLAGS) -fstack-protector-all

endif





### --- END CONFIGURATION SECTION ---