tools/objtool/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 include ../scripts/Makefile.include
   3 include ../scripts/Makefile.arch
   4
   5 ifeq ($(srctree),)
   6 srctree := $(patsubst %/,%,$(dir $(CURDIR)))
   7 srctree := $(patsubst %/,%,$(dir $(srctree)))
   8 endif
   9
  10 LIBSUBCMD_DIR = $(srctree)/tools/lib/subcmd/
  11 ifneq ($(OUTPUT),)
  12   LIBSUBCMD_OUTPUT = $(abspath $(OUTPUT))/libsubcmd
  13 else
  14   LIBSUBCMD_OUTPUT = $(CURDIR)/libsubcmd
  15 endif
  16 LIBSUBCMD = $(LIBSUBCMD_OUTPUT)/libsubcmd.a
  17
  18 OBJTOOL    := $(OUTPUT)objtool
  19 OBJTOOL_IN := $(OBJTOOL)-in.o
  20
  21 LIBELF_FLAGS := $(shell $(HOSTPKG_CONFIG) libelf --cflags 2>/dev/null)
  22 LIBELF_LIBS  := $(shell $(HOSTPKG_CONFIG) libelf --libs 2>/dev/null || echo -lelf)
  23
  24 all: $(OBJTOOL)
  25
  26 INCLUDES := -I$(srctree)/tools/include \
  27             -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
  28             -I$(srctree)/tools/arch/$(SRCARCH)/include  \
  29             -I$(srctree)/tools/objtool/include \
  30             -I$(srctree)/tools/objtool/arch/$(SRCARCH)/include \
  31             -I$(LIBSUBCMD_OUTPUT)/include
  32 # Note, EXTRA_WARNINGS here was determined for CC and not HOSTCC, it
  33 # is passed here to match a legacy behavior.
  34 WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed -Wno-nested-externs
  35 OBJTOOL_CFLAGS := -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS)
  36 OBJTOOL_LDFLAGS := $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)
  37
  38 # Allow old libelf to be used:
  39 elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(HOSTCC) $(OBJTOOL_CFLAGS) -x c -E - | grep elf_getshdr)
  40 OBJTOOL_CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED)
  41
  42 # Always want host compilation.
  43 HOST_OVERRIDES := CC="$(HOSTCC)" LD="$(HOSTLD)" AR="$(HOSTAR)"
  44
  45 AWK = awk
  46 MKDIR = mkdir
  47
  48 ifeq ($(V),1)
  49   Q =
  50 else
  51   Q = @
  52 endif
  53
  54 BUILD_ORC := n
  55
  56 ifeq ($(SRCARCH),x86)
  57         BUILD_ORC := y
  58 endif
  59
  60 export BUILD_ORC
  61 export srctree OUTPUT CFLAGS SRCARCH AWK
  62 include $(srctree)/tools/build/Makefile.include
  63
  64 $(OBJTOOL_IN): fixdep $(LIBSUBCMD) FORCE
  65         $(Q)$(CONFIG_SHELL) ./sync-check.sh
  66         $(Q)$(MAKE) $(build)=objtool $(HOST_OVERRIDES) CFLAGS="$(OBJTOOL_CFLAGS)" \
  67                 LDFLAGS="$(OBJTOOL_LDFLAGS)"
  68
  69
  70 $(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN)
  71         $(QUIET_LINK)$(HOSTCC) $(OBJTOOL_IN) $(OBJTOOL_LDFLAGS) -o $@
  72
  73
  74 $(LIBSUBCMD_OUTPUT):
  75         $(Q)$(MKDIR) -p $@
  76
  77 $(LIBSUBCMD): fixdep $(LIBSUBCMD_OUTPUT) FORCE
  78         $(Q)$(MAKE) -C $(LIBSUBCMD_DIR) O=$(LIBSUBCMD_OUTPUT) \
  79                 DESTDIR=$(LIBSUBCMD_OUTPUT) prefix= subdir= \
  80                 $(HOST_OVERRIDES) EXTRA_CFLAGS="$(OBJTOOL_CFLAGS)" \
  81                 $@ install_headers
  82
  83 $(LIBSUBCMD)-clean:
  84         $(call QUIET_CLEAN, libsubcmd)
  85         $(Q)$(RM) -r -- $(LIBSUBCMD_OUTPUT)
  86
  87 clean: $(LIBSUBCMD)-clean
  88         $(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL)
  89         $(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
  90         $(Q)$(RM) $(OUTPUT)arch/x86/lib/inat-tables.c $(OUTPUT)fixdep
  91
  92 FORCE:
  93
  94 .PHONY: clean FORCE