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