1# SPDX-License-Identifier: GPL-2.0 2include ../scripts/Makefile.include 3include ../scripts/Makefile.arch 4 5ifeq ($(ARCH),x86_64) 6ARCH := x86 7endif 8 9# always use the host compiler 10ifneq ($(LLVM),) 11HOSTAR ?= llvm-ar 12HOSTCC ?= clang 13HOSTLD ?= ld.lld 14else 15HOSTAR ?= ar 16HOSTCC ?= gcc 17HOSTLD ?= ld 18endif 19AR = $(HOSTAR) 20CC = $(HOSTCC) 21LD = $(HOSTLD) 22 23ifeq ($(srctree),) 24srctree := $(patsubst %/,%,$(dir $(CURDIR))) 25srctree := $(patsubst %/,%,$(dir $(srctree))) 26endif 27 28SUBCMD_SRCDIR = $(srctree)/tools/lib/subcmd/ 29LIBSUBCMD_OUTPUT = $(if $(OUTPUT),$(OUTPUT),$(CURDIR)/) 30LIBSUBCMD = $(LIBSUBCMD_OUTPUT)libsubcmd.a 31 32OBJTOOL := $(OUTPUT)objtool 33OBJTOOL_IN := $(OBJTOOL)-in.o 34 35LIBELF_FLAGS := $(shell pkg-config libelf --cflags 2>/dev/null) 36LIBELF_LIBS := $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) 37 38all: $(OBJTOOL) 39 40INCLUDES := -I$(srctree)/tools/include \ 41 -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \ 42 -I$(srctree)/tools/objtool/arch/$(ARCH)/include 43WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed 44CFLAGS := -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS) 45LDFLAGS += $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS) 46 47# Allow old libelf to be used: 48elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr) 49CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED) 50 51AWK = awk 52export srctree OUTPUT CFLAGS SRCARCH AWK 53include $(srctree)/tools/build/Makefile.include 54 55$(OBJTOOL_IN): fixdep FORCE 56 @$(MAKE) $(build)=objtool 57 58$(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN) 59 @$(CONFIG_SHELL) ./sync-check.sh 60 $(QUIET_LINK)$(CC) $(OBJTOOL_IN) $(LDFLAGS) -o $@ 61 62 63$(LIBSUBCMD): fixdep FORCE 64 $(Q)$(MAKE) -C $(SUBCMD_SRCDIR) OUTPUT=$(LIBSUBCMD_OUTPUT) 65 66clean: 67 $(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL) 68 $(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete 69 $(Q)$(RM) $(OUTPUT)arch/x86/lib/inat-tables.c $(OUTPUT)fixdep 70 71FORCE: 72 73.PHONY: clean FORCE 74