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 ifneq ($(LLVM),)
   7 HOSTAR  ?= llvm-ar
   8 HOSTCC  ?= clang
   9 HOSTLD  ?= ld.lld
  10 else
  11 HOSTAR  ?= ar
  12 HOSTCC  ?= gcc
  13 HOSTLD  ?= ld
  14 endif
  15 AR       = $(HOSTAR)
  16 CC       = $(HOSTCC)
  17 LD       = $(HOSTLD)
  18
  19 ifeq ($(srctree),)
  20 srctree := $(patsubst %/,%,$(dir $(CURDIR)))
  21 srctree := $(patsubst %/,%,$(dir $(srctree)))
  22 endif
  23
  24 SUBCMD_SRCDIR           = $(srctree)/tools/lib/subcmd/
  25 LIBSUBCMD_OUTPUT        = $(if $(OUTPUT),$(OUTPUT),$(CURDIR)/)
  26 LIBSUBCMD               = $(LIBSUBCMD_OUTPUT)libsubcmd.a
  27
  28 OBJTOOL    := $(OUTPUT)objtool
  29 OBJTOOL_IN := $(OBJTOOL)-in.o
  30
  31 LIBELF_FLAGS := $(shell pkg-config libelf --cflags 2>/dev/null)
  32 LIBELF_LIBS  := $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
  33
  34 all: $(OBJTOOL)
  35
  36 INCLUDES := -I$(srctree)/tools/include \
  37             -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
  38             -I$(srctree)/tools/arch/$(SRCARCH)/include  \
  39             -I$(srctree)/tools/objtool/arch/$(SRCARCH)/include
  40 WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed
  41 CFLAGS   := -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS)
  42 LDFLAGS  += $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)
  43
  44 # Allow old libelf to be used:
  45 elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr)
  46 CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED)
  47
  48 AWK = awk
  49 export srctree OUTPUT CFLAGS SRCARCH AWK
  50 include $(srctree)/tools/build/Makefile.include
  51
  52 $(OBJTOOL_IN): fixdep FORCE
  53         @$(CONFIG_SHELL) ./sync-check.sh
  54         @$(MAKE) $(build)=objtool
  55
  56 $(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN)
  57         $(QUIET_LINK)$(CC) $(OBJTOOL_IN) $(LDFLAGS) -o $@
  58
  59
  60 $(LIBSUBCMD): fixdep FORCE
  61         $(Q)$(MAKE) -C $(SUBCMD_SRCDIR) OUTPUT=$(LIBSUBCMD_OUTPUT)
  62
  63 clean:
  64         $(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL)
  65         $(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
  66         $(Q)$(RM) $(OUTPUT)arch/x86/inat-tables.c $(OUTPUT)fixdep
  67
  68 FORCE:
  69
  70 .PHONY: clean FORCE