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