LXR linux/scripts/gcc-plugins/Makefile

   1# SPDX-License-Identifier: GPL-2.0
   2
   3$(obj)/randomize_layout_plugin.so: $(objtree)/$(obj)/randomize_layout_seed.h
   4quiet_cmd_create_randomize_layout_seed = GENSEED $@
   5cmd_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)
   9targets += 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
  20always-y += $(GCC_PLUGIN)
  21
  22GCC_PLUGINS_DIR = $(shell $(CC) -print-file-name=plugin)
  23
  24plugin_cxxflags = -Wp,-MMD,$(depfile) $(KBUILD_HOSTCXXFLAGS) -fPIC \
  25                  -include $(srctree)/include/linux/compiler-version.h \
  26                   -I $(GCC_PLUGINS_DIR)/include -I $(obj) -std=gnu++11 \
  27                   -fno-rtti -fno-exceptions -fasynchronous-unwind-tables \
  28                   -ggdb -Wno-narrowing -Wno-unused-variable \
  29                   -Wno-format-diag
  30
  31plugin_ldflags  = -shared
  32
  33plugin-single   := $(foreach m, $(GCC_PLUGIN), $(if $($(m:%.so=%-objs)),,$(m)))
  34plugin-multi    := $(filter-out $(plugin-single), $(GCC_PLUGIN))
  35plugin-objs     := $(sort $(foreach m, $(plugin-multi), $($(m:%.so=%-objs))))
  36
  37targets += $(plugin-single) $(plugin-multi) $(plugin-objs)
  38clean-files += *.so
  39
  40plugin-single   := $(addprefix $(obj)/, $(plugin-single))
  41plugin-multi    := $(addprefix $(obj)/, $(plugin-multi))
  42plugin-objs     := $(addprefix $(obj)/, $(plugin-objs))
  43
  44quiet_cmd_plugin_cxx_so_c = HOSTCXX $@
  45      cmd_plugin_cxx_so_c = $(HOSTCXX) $(plugin_cxxflags) $(plugin_ldflags) -o $@ $<
  46
  47$(plugin-single): $(obj)/%.so: $(src)/%.c FORCE
  48        $(call if_changed_dep,plugin_cxx_so_c)
  49
  50quiet_cmd_plugin_ld_so_o = HOSTLD  $@
  51      cmd_plugin_ld_so_o = $(HOSTCXX) $(plugin_ldflags) -o $@ \
  52                           $(addprefix $(obj)/, $($(target-stem)-objs))
  53
  54$(plugin-multi): FORCE
  55        $(call if_changed,plugin_ld_so_o)
  56$(foreach m, $(notdir $(plugin-multi)), $(eval $(obj)/$m: $(addprefix $(obj)/, $($(m:%.so=%-objs)))))
  57
  58quiet_cmd_plugin_cxx_o_c = HOSTCXX $@
  59      cmd_plugin_cxx_o_c = $(HOSTCXX) $(plugin_cxxflags) -c -o $@ $<
  60
  61$(plugin-objs): $(obj)/%.o: $(src)/%.c FORCE
  62        $(call if_changed_dep,plugin_cxx_o_c)
  63