tools/objtool/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 include ../scripts/Makefile.include
   3 include ../scripts/Makefile.arch
   4
   5 ifeq ($(ARCH),x86_64)
   6 ARCH := x86
   7 endif
   8
   9 # always use the host compiler
  10 AR       = $(HOSTAR)
  11 CC       = $(HOSTCC)
  12 LD       = $(HOSTLD)
  13
  14 ifeq ($(srctree),)
  15 srctree := $(patsubst %/,%,$(dir $(CURDIR)))
  16 srctree := $(patsubst %/,%,$(dir $(srctree)))
  17 endif
  18
  19 SUBCMD_SRCDIR           = $(srctree)/tools/lib/subcmd/
  20 LIBSUBCMD_OUTPUT        = $(if $(OUTPUT),$(OUTPUT),$(CURDIR)/)
  21 LIBSUBCMD               = $(LIBSUBCMD_OUTPUT)libsubcmd.a
  22
  23 OBJTOOL    := $(OUTPUT)objtool
  24 OBJTOOL_IN := $(OBJTOOL)-in.o
  25
  26 LIBELF_FLAGS := $(shell pkg-config libelf --cflags 2>/dev/null)
  27 LIBELF_LIBS  := $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
  28
  29 all: $(OBJTOOL)
  30
  31 INCLUDES := -I$(srctree)/tools/include \
  32             -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
  33             -I$(srctree)/tools/objtool/arch/$(ARCH)/include
  34 WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed
  35 CFLAGS   := -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS)
  36 LDFLAGS  += $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)
  37
  38 # Allow old libelf to be used:
  39 elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr)
  40 CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED)
  41
  42 AWK = awk
  43 export srctree OUTPUT CFLAGS SRCARCH AWK
  44 include $(srctree)/tools/build/Makefile.include
  45
  46 $(OBJTOOL_IN): fixdep FORCE
  47         @$(MAKE) $(build)=objtool
  48
  49 $(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN)
  50         @$(CONFIG_SHELL) ./sync-check.sh
  51         $(QUIET_LINK)$(CC) $(OBJTOOL_IN) $(LDFLAGS) -o $@
  52
  53
  54 $(LIBSUBCMD): fixdep FORCE
  55         $(Q)$(MAKE) -C $(SUBCMD_SRCDIR) OUTPUT=$(LIBSUBCMD_OUTPUT)
  56
  57 clean:
  58         $(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL)
  59         $(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
  60         $(Q)$(RM) $(OUTPUT)arch/x86/lib/inat-tables.c $(OUTPUT)fixdep
  61
  62 FORCE:
  63
  64 .PHONY: clean FORCE