# SPDX-License-Identifier: GPL-2.0

  include ../scripts/Makefile.include

  include ../scripts/Makefile.arch

  ifeq ($(ARCH),x86_64)
  ARCH := x86
  endif

  # always use the host compiler

  HOSTCC	?= gcc
  HOSTLD	?= ld
  CC	 = $(HOSTCC)
  LD	 = $(HOSTLD)
  AR	 = ar

  ifeq ($(srctree),)

  srctree := $(patsubst %/,%,$(dir $(CURDIR)))

  srctree := $(patsubst %/,%,$(dir $(srctree)))
  endif

  SUBCMD_SRCDIR		= $(srctree)/tools/lib/subcmd/

  LIBSUBCMD_OUTPUT	= $(if $(OUTPUT),$(OUTPUT),$(CURDIR)/)

  LIBSUBCMD		= $(LIBSUBCMD_OUTPUT)libsubcmd.a

  
  OBJTOOL    := $(OUTPUT)objtool
  OBJTOOL_IN := $(OBJTOOL)-in.o

  LIBELF_FLAGS := $(shell pkg-config libelf --cflags 2>/dev/null)
  LIBELF_LIBS  := $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)

  all: $(OBJTOOL)

  INCLUDES := -I$(srctree)/tools/include \
  	    -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \

  	    -I$(srctree)/tools/objtool/arch/$(ARCH)/include

  WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed

  CFLAGS   += -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS)
  LDFLAGS  += $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)

  # Allow old libelf to be used:

  elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr)

  CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED)

  AWK = awk

  export srctree OUTPUT CFLAGS SRCARCH AWK

  include $(srctree)/tools/build/Makefile.include
  
  $(OBJTOOL_IN): fixdep FORCE
  	@$(MAKE) $(build)=objtool
  
  $(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN)

  	@$(CONFIG_SHELL) ./sync-check.sh

  	$(QUIET_LINK)$(CC) $(OBJTOOL_IN) $(LDFLAGS) -o $@
  
  
  $(LIBSUBCMD): fixdep FORCE

  	$(Q)$(MAKE) -C $(SUBCMD_SRCDIR) OUTPUT=$(LIBSUBCMD_OUTPUT)

  clean:

  	$(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL)
  	$(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete

  	$(Q)$(RM) $(OUTPUT)arch/x86/lib/inat-tables.c $(OUTPUT)fixdep

  
  FORCE:
  
  .PHONY: clean FORCE