1# SPDX-License-Identifier: GPL-2.0 2include ../scripts/Makefile.include 3include ../scripts/Makefile.arch 4 5ifeq ($(ARCH),x86_64) 6ARCH := x86 7endif 8 9# always use the host compiler 10CC = gcc 11LD = ld 12AR = ar 13 14ifeq ($(srctree),) 15srctree := $(patsubst %/,%,$(dir $(CURDIR))) 16srctree := $(patsubst %/,%,$(dir $(srctree))) 17endif 18 19SUBCMD_SRCDIR = $(srctree)/tools/lib/subcmd/ 20LIBSUBCMD_OUTPUT = $(if $(OUTPUT),$(OUTPUT),$(CURDIR)/) 21LIBSUBCMD = $(LIBSUBCMD_OUTPUT)libsubcmd.a 22 23OBJTOOL := $(OUTPUT)objtool 24OBJTOOL_IN := $(OBJTOOL)-in.o 25 26all: $(OBJTOOL) 27 28INCLUDES := -I$(srctree)/tools/include \ 29 -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \ 30 -I$(srctree)/tools/objtool/arch/$(ARCH)/include 31WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed 32CFLAGS += -Wall -Werror $(WARNINGS) -fomit-frame-pointer -O2 -g $(INCLUDES) 33LDFLAGS += -lelf $(LIBSUBCMD) 34 35# Allow old libelf to be used: 36elfshdr := $(shell echo '\#include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr) 37CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED) 38 39AWK = awk 40export srctree OUTPUT CFLAGS SRCARCH AWK 41include $(srctree)/tools/build/Makefile.include 42 43$(OBJTOOL_IN): fixdep FORCE 44 @$(MAKE) $(build)=objtool 45 46$(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN) 47 @./sync-check.sh 48 $(QUIET_LINK)$(CC) $(OBJTOOL_IN) $(LDFLAGS) -o $@ 49 50 51$(LIBSUBCMD): fixdep FORCE 52 $(Q)$(MAKE) -C $(SUBCMD_SRCDIR) OUTPUT=$(LIBSUBCMD_OUTPUT) 53 54clean: 55 $(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL) 56 $(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete 57 $(Q)$(RM) $(OUTPUT)arch/x86/lib/inat-tables.c $(OUTPUT)fixdep 58 59FORCE: 60 61.PHONY: clean FORCE 62