# SPDX-License-Identifier: GPL-2.0

  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

    gcc-plugin-$(CONFIG_GCC_PLUGIN_LATENT_ENTROPY)	+= latent_entropy_plugin.so
    gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_LATENT_ENTROPY)	+= -DLATENT_ENTROPY_PLUGIN

    ifdef CONFIG_GCC_PLUGIN_LATENT_ENTROPY

      DISABLE_LATENT_ENTROPY_PLUGIN			+= -fplugin-arg-latent_entropy_plugin-disable
    endif

    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-plugin-$(CONFIG_GCC_PLUGIN_STRUCTLEAK)	+= structleak_plugin.so
    gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK_VERBOSE)	+= -fplugin-arg-structleak_plugin-verbose

    gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL)	+= -fplugin-arg-structleak_plugin-byref-all

    gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK)	+= -DSTRUCTLEAK_PLUGIN

    gcc-plugin-$(CONFIG_GCC_PLUGIN_RANDSTRUCT)	+= randomize_layout_plugin.so
    gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_RANDSTRUCT)	+= -DRANDSTRUCT_PLUGIN
    gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_RANDSTRUCT_PERFORMANCE)	+= -fplugin-arg-randomize_layout_plugin-performance-mode

    GCC_PLUGINS_CFLAGS := $(strip $(addprefix -fplugin=$(objtree)/scripts/gcc-plugins/, $(gcc-plugin-y)) $(gcc-plugin-cflags-y))

    export PLUGINCC GCC_PLUGINS_CFLAGS GCC_PLUGIN GCC_PLUGIN_SUBDIR
    export SANCOV_PLUGIN DISABLE_LATENT_ENTROPY_PLUGIN

    ifneq ($(PLUGINCC),)
      # 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)

    GCC_PLUGIN_SUBDIR := $(gcc-plugin-subdir-y)

  endif
  
  # If plugins aren't supported, abort the build before hard-to-read compiler
  # errors start getting spewed by the main build.
  PHONY += gcc-plugins-check
  gcc-plugins-check: FORCE
  ifdef CONFIG_GCC_PLUGINS

    ifeq ($(PLUGINCC),)
      ifneq ($(GCC_PLUGINS_CFLAGS),)

        # Various gccs between 4.5 and 5.1 have bugs on powerpc due to missing
        # header files. gcc <= 4.6 doesn't work at all, gccs from 4.8 to 5.1 have
        # issues with 64-bit targets.
        ifeq ($(ARCH),powerpc)
          ifeq ($(call cc-ifversion, -le, 0501, y), y)
  	  @echo "Cannot use CONFIG_GCC_PLUGINS: plugin support on gcc <= 5.1 is buggy on powerpc, please upgrade to gcc 5.2 or newer" >&2 && exit 1
          endif
        endif

        ifeq ($(call cc-ifversion, -ge, 0405, y), y)

  	$(Q)$(srctree)/scripts/gcc-plugin.sh --show-error "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)" || true
  	@echo "Cannot use CONFIG_GCC_PLUGINS: your gcc installation does not support plugins, perhaps the necessary headers are missing?" >&2 && exit 1

        else

  	@echo "Cannot use CONFIG_GCC_PLUGINS: your gcc version does not support plugins, you should upgrade it to at least gcc 4.5" >&2 && exit 1

        endif
      endif
    endif

  endif
  	@:

  # Actually do the build, if requested.
  PHONY += gcc-plugins
  gcc-plugins: scripts_basic gcc-plugins-check
  ifdef CONFIG_GCC_PLUGINS
  	$(Q)$(MAKE) $(build)=scripts/gcc-plugins

  endif

  	@: