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 28LIBELF_FLAGS := $(shell pkg-config libelf --cflags 2>/dev/null) 29LIBELF_LIBS := $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) 30 31all: $(OBJTOOL) 32 33INCLUDES := -I$(srctree)/tools/include \ 34 -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \ 35 -I$(srctree)/tools/objtool/arch/$(ARCH)/include 36WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed 37CFLAGS += -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS) 38LDFLAGS += $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS) 39 40# Allow old libelf to be used: 41elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr) 42CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED) 43 44AWK = awk 45export srctree OUTPUT CFLAGS SRCARCH AWK 46include $(srctree)/tools/build/Makefile.include 47 48$(OBJTOOL_IN): fixdep FORCE 49 @$(MAKE) $(build)=objtool 50 51$(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN) 52 @$(CONFIG_SHELL) ./sync-check.sh 53 $(QUIET_LINK)$(CC) $(OBJTOOL_IN) $(LDFLAGS) -o $@ 54 55 56$(LIBSUBCMD): fixdep FORCE 57 $(Q)$(MAKE) -C $(SUBCMD_SRCDIR) OUTPUT=$(LIBSUBCMD_OUTPUT) 58 59clean: 60 $(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL) 61 $(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete 62 $(Q)$(RM) $(OUTPUT)arch/x86/lib/inat-tables.c $(OUTPUT)fixdep 63 64FORCE: 65 66.PHONY: clean FORCE 67