scripts/Makefile.gcc-plugins

ifdef CONFIG_GCC_PLUGINS
  __PLUGINCC := $(call cc-ifversion, -ge, 0408, $(HOSTCXX), $(HOSTCC))
  PLUGINCC := $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-plugin.sh "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)")

  gcc-plugin-$(CONFIG_GCC_PLUGIN_CYC_COMPLEXITY)	+= cyc_complexity_plugin.so
  GCC_PLUGINS_CFLAGS := $(addprefix -fplugin=$(objtree)/scripts/gcc-plugins/, $(gcc-plugin-y))

  export PLUGINCC GCC_PLUGINS_CFLAGS GCC_PLUGIN

  ifeq ($(PLUGINCC),)
    ifneq ($(GCC_PLUGINS_CFLAGS),)
      ifeq ($(call cc-ifversion, -ge, 0405, y), y)
        PLUGINCC := $(shell $(CONFIG_SHELL) -x $(srctree)/scripts/gcc-plugin.sh "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)")
        $(warning warning: your gcc installation does not support plugins, perhaps the necessary headers are missing?)
      else
        $(warning warning: your gcc version does not support plugins, you should upgrade it to gcc 4.5 at least)
      endif
    endif
  endif

  KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
  GCC_PLUGIN := $(gcc-plugin-y)

endif