scripts/gcc-plugins/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2
   3 $(obj)/randomize_layout_plugin.so: $(objtree)/$(obj)/randomize_layout_seed.h
   4 quiet_cmd_create_randomize_layout_seed = GENSEED $@
   5 cmd_create_randomize_layout_seed = \
   6   $(CONFIG_SHELL) $(srctree)/$(src)/gen-random-seed.sh $@ $(objtree)/include/generated/randomize_layout_hash.h
   7 $(objtree)/$(obj)/randomize_layout_seed.h: FORCE
   8         $(call if_changed,create_randomize_layout_seed)
   9 targets += randomize_layout_seed.h randomize_layout_hash.h
  10
  11 # Build rules for plugins
  12 #
  13 # No extra code is needed for single-file plugins.
  14 # For multi-file plugins, use *-objs syntax to list the objects.
  15 #
  16 # If the plugin foo.so is compiled from foo.c and foo2.c, you can do:
  17 #
  18 # foo-objs := foo.o foo2.o
  19
  20 always-y += $(GCC_PLUGIN)
  21
  22 GCC_PLUGINS_DIR = $(shell $(CC) -print-file-name=plugin)
  23
  24 plugin_cxxflags = -Wp,-MMD,$(depfile) $(KBUILD_HOSTCXXFLAGS) -fPIC \
  25                    -I $(GCC_PLUGINS_DIR)/include -I $(obj) -std=gnu++11 \
  26                    -fno-rtti -fno-exceptions -fasynchronous-unwind-tables \
  27                    -ggdb -Wno-narrowing -Wno-unused-variable \
  28                    -Wno-format-diag
  29
  30 plugin_ldflags  = -shared
  31
  32 plugin-single   := $(foreach m, $(GCC_PLUGIN), $(if $($(m:%.so=%-objs)),,$(m)))
  33 plugin-multi    := $(filter-out $(plugin-single), $(GCC_PLUGIN))
  34 plugin-objs     := $(sort $(foreach m, $(plugin-multi), $($(m:%.so=%-objs))))
  35
  36 targets += $(plugin-single) $(plugin-multi) $(plugin-objs)
  37 clean-files += *.so
  38
  39 plugin-single   := $(addprefix $(obj)/, $(plugin-single))
  40 plugin-multi    := $(addprefix $(obj)/, $(plugin-multi))
  41 plugin-objs     := $(addprefix $(obj)/, $(plugin-objs))
  42
  43 quiet_cmd_plugin_cxx_so_c = HOSTCXX $@
  44       cmd_plugin_cxx_so_c = $(HOSTCXX) $(plugin_cxxflags) $(plugin_ldflags) -o $@ $<
  45
  46 $(plugin-single): $(obj)/%.so: $(src)/%.c FORCE
  47         $(call if_changed_dep,plugin_cxx_so_c)
  48
  49 quiet_cmd_plugin_ld_so_o = HOSTLD  $@
  50       cmd_plugin_ld_so_o = $(HOSTCXX) $(plugin_ldflags) -o $@ \
  51                            $(addprefix $(obj)/, $($(target-stem)-objs))
  52
  53 $(plugin-multi): FORCE
  54         $(call if_changed,plugin_ld_so_o)
  55 $(foreach m, $(notdir $(plugin-multi)), $(eval $(obj)/$m: $(addprefix $(obj)/, $($(m:%.so=%-objs)))))
  56
  57 quiet_cmd_plugin_cxx_o_c = HOSTCXX $@
  58       cmd_plugin_cxx_o_c = $(HOSTCXX) $(plugin_cxxflags) -c -o $@ $<
  59
  60 $(plugin-objs): $(obj)/%.o: $(src)/%.c FORCE
  61         $(call if_changed_dep,plugin_cxx_o_c)