de28c15daf
Some toolchains (like Hardened Gentoo) define _FORTIFY_SOURCE in the built-in, default args. This causes perf builds to fail with: <command-line>:0:0: error: "_FORTIFY_SOURCE" redefined [-Werror] <built-in>: note: this is the location of the previous definition cc1: all warnings being treated as errors To avoid this, undefine _FORTIFY_SOURCE before (possibly re-)defining it in tools/lib/api. v2 applies cleanly on top of already pulled kbuild changes for 4.1-rc1. Signed-off-by: Bobby Powers <bobbypowers@gmail.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Dirk Gouders <dirk@gouders.net> Cc: Michal Marek <mmarek@suse.cz> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: linux-kbuild@vger.kernel.org Link: http://lkml.kernel.org/r/1429658381-3039-1-git-send-email-bobbypowers@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
44 lines
1 KiB
Makefile
44 lines
1 KiB
Makefile
include ../../scripts/Makefile.include
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include ../../perf/config/utilities.mak # QUIET_CLEAN
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ifeq ($(srctree),)
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srctree := $(patsubst %/,%,$(dir $(shell pwd)))
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srctree := $(patsubst %/,%,$(dir $(srctree)))
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srctree := $(patsubst %/,%,$(dir $(srctree)))
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#$(info Determined 'srctree' to be $(srctree))
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endif
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CC = $(CROSS_COMPILE)gcc
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AR = $(CROSS_COMPILE)ar
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MAKEFLAGS += --no-print-directory
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LIBFILE = $(OUTPUT)libapi.a
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CFLAGS := $(EXTRA_WARNINGS) $(EXTRA_CFLAGS)
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CFLAGS += -ggdb3 -Wall -Wextra -std=gnu99 -Werror -O6 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fPIC
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CFLAGS += -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
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RM = rm -f
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build := -f $(srctree)/tools/build/Makefile.build dir=. obj
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API_IN := $(OUTPUT)libapi-in.o
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export srctree OUTPUT CC LD CFLAGS V
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all: $(LIBFILE)
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$(API_IN): FORCE
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@$(MAKE) $(build)=libapi
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$(LIBFILE): $(API_IN)
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$(QUIET_AR)$(RM) $@ && $(AR) rcs $@ $(API_IN)
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clean:
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$(call QUIET_CLEAN, libapi) $(RM) $(LIBFILE); \
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find $(if $(OUTPUT),$(OUTPUT),.) -name \*.o | xargs $(RM)
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FORCE:
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.PHONY: clean FORCE
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