tools/objtool/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 include ../scripts/Makefile.include
   3 include ../scripts/Makefile.arch
   4
   5 ifeq ($(ARCH),x86_64)
   6 ARCH := x86
   7 endif
   8
   9 # always use the host compiler
  10 CC = gcc
  11 LD = ld
  12 AR = ar
  13
  14 ifeq ($(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 all: $(OBJTOOL)
  27
  28 INCLUDES := -I$(srctree)/tools/include \
  29             -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
  30             -I$(srctree)/tools/objtool/arch/$(HOSTARCH)/include
  31 WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed
  32 CFLAGS   += -Wall -Werror $(WARNINGS) -fomit-frame-pointer -O2 -g $(INCLUDES)
  33 LDFLAGS  += -lelf $(LIBSUBCMD)
  34
  35 # Allow old libelf to be used:
  36 elfshdr := $(shell echo '\#include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr)
  37 CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED)
  38
  39 AWK = awk
  40 export srctree OUTPUT CFLAGS SRCARCH AWK
  41 include $(srctree)/tools/build/Makefile.include
  42
  43 $(OBJTOOL_IN): fixdep FORCE
  44         @$(MAKE) $(build)=objtool
  45
  46 # Busybox's diff doesn't have -I, avoid warning in that case
  47 #
  48 $(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN)
  49         @(diff -I 2>&1 | grep -q 'option requires an argument' && \
  50         test -d ../../kernel -a -d ../../tools -a -d ../objtool && (( \
  51         diff arch/x86/lib/insn.c ../../arch/x86/lib/insn.c >/dev/null && \
  52         diff arch/x86/lib/inat.c ../../arch/x86/lib/inat.c >/dev/null && \
  53         diff arch/x86/lib/x86-opcode-map.txt ../../arch/x86/lib/x86-opcode-map.txt >/dev/null && \
  54         diff arch/x86/tools/gen-insn-attr-x86.awk ../../arch/x86/tools/gen-insn-attr-x86.awk >/dev/null && \
  55         diff arch/x86/include/asm/insn.h ../../arch/x86/include/asm/insn.h >/dev/null && \
  56         diff arch/x86/include/asm/inat.h ../../arch/x86/include/asm/inat.h >/dev/null && \
  57         diff arch/x86/include/asm/inat_types.h ../../arch/x86/include/asm/inat_types.h >/dev/null) \
  58         || echo "warning: objtool: x86 instruction decoder differs from kernel" >&2 )) || true
  59         @(test -d ../../kernel -a -d ../../tools -a -d ../objtool && (( \
  60         diff ../../arch/x86/include/asm/orc_types.h arch/x86/include/asm/orc_types.h >/dev/null) \
  61         || echo "warning: objtool: orc_types.h differs from kernel" >&2 )) || true
  62         $(QUIET_LINK)$(CC) $(OBJTOOL_IN) $(LDFLAGS) -o $@
  63
  64
  65 $(LIBSUBCMD): fixdep FORCE
  66         $(Q)$(MAKE) -C $(SUBCMD_SRCDIR) OUTPUT=$(LIBSUBCMD_OUTPUT)
  67
  68 clean:
  69         $(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL)
  70         $(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
  71         $(Q)$(RM) $(OUTPUT)arch/x86/lib/inat-tables.c $(OUTPUT)fixdep
  72
  73 FORCE:
  74
  75 .PHONY: clean FORCE