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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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596a9f6768
It may be useful to compile host programs with different flags (e.g. hardening). Ensure that objtool picks up the appropriate flags. Signed-off-by: Laura Abbott <labbott@redhat.com> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kbuild@vger.kernel.org Link: http://lkml.kernel.org/r/05a360681176f1423cb2fde8faae3a0a0261afc5.1523560825.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
63 lines
1.7 KiB
Makefile
63 lines
1.7 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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include ../scripts/Makefile.include
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include ../scripts/Makefile.arch
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ifeq ($(ARCH),x86_64)
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ARCH := x86
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endif
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# always use the host compiler
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HOSTCC ?= gcc
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HOSTLD ?= ld
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CC = $(HOSTCC)
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LD = $(HOSTLD)
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AR = ar
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ifeq ($(srctree),)
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srctree := $(patsubst %/,%,$(dir $(CURDIR)))
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srctree := $(patsubst %/,%,$(dir $(srctree)))
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endif
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SUBCMD_SRCDIR = $(srctree)/tools/lib/subcmd/
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LIBSUBCMD_OUTPUT = $(if $(OUTPUT),$(OUTPUT),$(CURDIR)/)
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LIBSUBCMD = $(LIBSUBCMD_OUTPUT)libsubcmd.a
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OBJTOOL := $(OUTPUT)objtool
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OBJTOOL_IN := $(OBJTOOL)-in.o
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all: $(OBJTOOL)
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INCLUDES := -I$(srctree)/tools/include \
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-I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
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-I$(srctree)/tools/objtool/arch/$(ARCH)/include
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WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed
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CFLAGS += -Werror $(WARNINGS) $(HOSTCFLAGS) -g $(INCLUDES)
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LDFLAGS += -lelf $(LIBSUBCMD) $(HOSTLDFLAGS)
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# Allow old libelf to be used:
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elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr)
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CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED)
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AWK = awk
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export srctree OUTPUT CFLAGS SRCARCH AWK
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include $(srctree)/tools/build/Makefile.include
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$(OBJTOOL_IN): fixdep FORCE
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@$(MAKE) $(build)=objtool
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$(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN)
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@$(CONFIG_SHELL) ./sync-check.sh
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$(QUIET_LINK)$(CC) $(OBJTOOL_IN) $(LDFLAGS) -o $@
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$(LIBSUBCMD): fixdep FORCE
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$(Q)$(MAKE) -C $(SUBCMD_SRCDIR) OUTPUT=$(LIBSUBCMD_OUTPUT)
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clean:
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$(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL)
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$(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
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$(Q)$(RM) $(OUTPUT)arch/x86/lib/inat-tables.c $(OUTPUT)fixdep
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FORCE:
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.PHONY: clean FORCE
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