perf tools: Test -fstack-protector-all compiler option for inclusion in CFLAGS (5d7bdab7) · Commits · 戴 / test

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:

Michael 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:

Ingo Molnar <mingo@elte.hu>

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 ---

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