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