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>
64 lines
1.7 KiB
Makefile
64 lines
1.7 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
|
|
include ../scripts/Makefile.include
|
|
include ../scripts/Makefile.arch
|
|
|
|
ifeq ($(ARCH),x86_64)
|
|
ARCH := x86
|
|
endif
|
|
|
|
# always use the host compiler
|
|
HOSTCC ?= gcc
|
|
HOSTLD ?= ld
|
|
CC = $(HOSTCC)
|
|
LD = $(HOSTLD)
|
|
AR = ar
|
|
|
|
ifeq ($(srctree),)
|
|
srctree := $(patsubst %/,%,$(dir $(CURDIR)))
|
|
srctree := $(patsubst %/,%,$(dir $(srctree)))
|
|
endif
|
|
|
|
SUBCMD_SRCDIR = $(srctree)/tools/lib/subcmd/
|
|
LIBSUBCMD_OUTPUT = $(if $(OUTPUT),$(OUTPUT),$(CURDIR)/)
|
|
LIBSUBCMD = $(LIBSUBCMD_OUTPUT)libsubcmd.a
|
|
|
|
OBJTOOL := $(OUTPUT)objtool
|
|
OBJTOOL_IN := $(OBJTOOL)-in.o
|
|
|
|
all: $(OBJTOOL)
|
|
|
|
INCLUDES := -I$(srctree)/tools/include \
|
|
-I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
|
|
-I$(srctree)/tools/objtool/arch/$(ARCH)/include
|
|
WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed
|
|
CFLAGS += -Werror $(WARNINGS) $(HOSTCFLAGS) -g $(INCLUDES)
|
|
LDFLAGS += -lelf $(LIBSUBCMD) $(HOSTLDFLAGS)
|
|
|
|
# Allow old libelf to be used:
|
|
elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr)
|
|
CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED)
|
|
|
|
AWK = awk
|
|
export srctree OUTPUT CFLAGS SRCARCH AWK
|
|
include $(srctree)/tools/build/Makefile.include
|
|
|
|
$(OBJTOOL_IN): fixdep FORCE
|
|
@$(MAKE) $(build)=objtool
|
|
|
|
$(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN)
|
|
@$(CONFIG_SHELL) ./sync-check.sh
|
|
$(QUIET_LINK)$(CC) $(OBJTOOL_IN) $(LDFLAGS) -o $@
|
|
|
|
|
|
$(LIBSUBCMD): fixdep FORCE
|
|
$(Q)$(MAKE) -C $(SUBCMD_SRCDIR) OUTPUT=$(LIBSUBCMD_OUTPUT)
|
|
|
|
clean:
|
|
$(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL)
|
|
$(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
|
|
$(Q)$(RM) $(OUTPUT)arch/x86/lib/inat-tables.c $(OUTPUT)fixdep
|
|
|
|
FORCE:
|
|
|
|
.PHONY: clean FORCE
|