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