tools/objtool/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 include ../scripts/Makefile.include
   3 include ../scripts/Makefile.arch
   4
   5 # always use the host compiler
   6 HOSTAR  ?= ar
   7 HOSTCC  ?= gcc
   8 HOSTLD  ?= ld
   9 AR       = $(HOSTAR)
  10 CC       = $(HOSTCC)
  11 LD       = $(HOSTLD)
  12
  13 ifeq ($(srctree),)
  14 srctree := $(patsubst %/,%,$(dir $(CURDIR)))
  15 srctree := $(patsubst %/,%,$(dir $(srctree)))
  16 endif
  17
  18 SUBCMD_SRCDIR           = $(srctree)/tools/lib/subcmd/
  19 LIBSUBCMD_OUTPUT        = $(if $(OUTPUT),$(OUTPUT),$(CURDIR)/)
  20 LIBSUBCMD               = $(LIBSUBCMD_OUTPUT)libsubcmd.a
  21
  22 OBJTOOL    := $(OUTPUT)objtool
  23 OBJTOOL_IN := $(OBJTOOL)-in.o
  24
  25 LIBELF_FLAGS := $(shell pkg-config libelf --cflags 2>/dev/null)
  26 LIBELF_LIBS  := $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
  27
  28 all: $(OBJTOOL)
  29
  30 INCLUDES := -I$(srctree)/tools/include \
  31             -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
  32             -I$(srctree)/tools/arch/$(SRCARCH)/include
  33 WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed
  34 CFLAGS   := -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS)
  35 LDFLAGS  += $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)
  36
  37 # Allow old libelf to be used:
  38 elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr)
  39 CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED)
  40
  41 AWK = awk
  42 export srctree OUTPUT CFLAGS SRCARCH AWK
  43 include $(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
  56 clean:
  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/inat-tables.c $(OUTPUT)fixdep
  60
  61 FORCE:
  62
  63 .PHONY: clean FORCE