ifdef CONFIG_GCC_PLUGINS  __PLUGINCC := $(call cc-ifversion, -ge, 0408, $(HOSTCXX), $(HOSTCC))  PLUGINCC := $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-plugin.sh "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)")   SANCOV_PLUGIN := -fplugin=$(objtree)/scripts/gcc-plugins/sancov_plugin.so   gcc-plugin-$(CONFIG_GCC_PLUGIN_CYC_COMPLEXITY)	+= cyc_complexity_plugin.so   ifdef CONFIG_GCC_PLUGIN_SANCOV    ifeq ($(CFLAGS_KCOV),)      # It is needed because of the gcc-plugin.sh and gcc version checks.      gcc-plugin-$(CONFIG_GCC_PLUGIN_SANCOV)           += sancov_plugin.so       ifneq ($(PLUGINCC),)        CFLAGS_KCOV := $(SANCOV_PLUGIN)      else        $(warning warning: cannot use CONFIG_KCOV: -fsanitize-coverage=trace-pc is not supported by compiler)      endif    endif  endif   GCC_PLUGINS_CFLAGS := $(addprefix -fplugin=$(objtree)/scripts/gcc-plugins/, $(gcc-plugin-y))   export PLUGINCC GCC_PLUGINS_CFLAGS GCC_PLUGIN SANCOV_PLUGIN   ifeq ($(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  else    # SANCOV_PLUGIN can be only in CFLAGS_KCOV because avoid duplication.    GCC_PLUGINS_CFLAGS := $(filter-out $(SANCOV_PLUGIN), $(GCC_PLUGINS_CFLAGS))  endif   KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)  GCC_PLUGIN := $(gcc-plugin-y) endif