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 HOSTAR  ?= ar
  11 HOSTCC  ?= gcc
  12 HOSTLD  ?= ld
  13 AR       = $(HOSTAR)
  14 CC       = $(HOSTCC)
  15 LD       = $(HOSTLD)
  16
  17 ifeq ($(srctree),)
  18 srctree := $(patsubst %/,%,$(dir $(CURDIR)))
  19 srctree := $(patsubst %/,%,$(dir $(srctree)))
  20 endif
  21
  22 SUBCMD_SRCDIR           = $(srctree)/tools/lib/subcmd/
  23 LIBSUBCMD_OUTPUT        = $(if $(OUTPUT),$(OUTPUT),$(CURDIR)/)
  24 LIBSUBCMD               = $(LIBSUBCMD_OUTPUT)libsubcmd.a
  25
  26 OBJTOOL    := $(OUTPUT)objtool
  27 OBJTOOL_IN := $(OBJTOOL)-in.o
  28
  29 LIBELF_FLAGS := $(shell pkg-config libelf --cflags 2>/dev/null)
  30 LIBELF_LIBS  := $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
  31
  32 all: $(OBJTOOL)
  33
  34 INCLUDES := -I$(srctree)/tools/include \
  35             -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
  36             -I$(srctree)/tools/objtool/arch/$(ARCH)/include
  37 WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed
  38 CFLAGS   += -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS)
  39 LDFLAGS  += $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)
  40
  41 # Allow old libelf to be used:
  42 elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr)
  43 CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED)
  44
  45 AWK = awk
  46 export srctree OUTPUT CFLAGS SRCARCH AWK
  47 include $(srctree)/tools/build/Makefile.include
  48
  49 $(OBJTOOL_IN): fixdep FORCE
  50         @$(MAKE) $(build)=objtool
  51
  52 $(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN)
  53         @$(CONFIG_SHELL) ./sync-check.sh
  54         $(QUIET_LINK)$(CC) $(OBJTOOL_IN) $(LDFLAGS) -o $@
  55
  56
  57 $(LIBSUBCMD): fixdep FORCE
  58         $(Q)$(MAKE) -C $(SUBCMD_SRCDIR) OUTPUT=$(LIBSUBCMD_OUTPUT)
  59
  60 clean:
  61         $(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL)
  62         $(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
  63         $(Q)$(RM) $(OUTPUT)arch/x86/lib/inat-tables.c $(OUTPUT)fixdep
  64
  65 FORCE:
  66
  67 .PHONY: clean FORCE