LXR linux/scripts/Makefile.gcc-plugins

   1ifdef CONFIG_GCC_PLUGINS
   2  __PLUGINCC := $(call cc-ifversion, -ge, 0408, $(HOSTCXX), $(HOSTCC))
   3  PLUGINCC := $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-plugin.sh "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)")
   4
   5  SANCOV_PLUGIN := -fplugin=$(objtree)/scripts/gcc-plugins/sancov_plugin.so
   6
   7  gcc-plugin-$(CONFIG_GCC_PLUGIN_CYC_COMPLEXITY)        += cyc_complexity_plugin.so
   8
   9  gcc-plugin-$(CONFIG_GCC_PLUGIN_LATENT_ENTROPY)        += latent_entropy_plugin.so
  10  gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_LATENT_ENTROPY) += -DLATENT_ENTROPY_PLUGIN
  11  ifdef CONFIG_PAX_LATENT_ENTROPY
  12    DISABLE_LATENT_ENTROPY_PLUGIN                       += -fplugin-arg-latent_entropy_plugin-disable
  13  endif
  14
  15  ifdef CONFIG_GCC_PLUGIN_SANCOV
  16    ifeq ($(CFLAGS_KCOV),)
  17      # It is needed because of the gcc-plugin.sh and gcc version checks.
  18      gcc-plugin-$(CONFIG_GCC_PLUGIN_SANCOV)           += sancov_plugin.so
  19
  20      ifneq ($(PLUGINCC),)
  21        CFLAGS_KCOV := $(SANCOV_PLUGIN)
  22      else
  23        $(warning warning: cannot use CONFIG_KCOV: -fsanitize-coverage=trace-pc is not supported by compiler)
  24      endif
  25    endif
  26  endif
  27
  28  GCC_PLUGINS_CFLAGS := $(strip $(addprefix -fplugin=$(objtree)/scripts/gcc-plugins/, $(gcc-plugin-y)) $(gcc-plugin-cflags-y))
  29
  30  export PLUGINCC GCC_PLUGINS_CFLAGS GCC_PLUGIN GCC_PLUGIN_SUBDIR
  31  export SANCOV_PLUGIN DISABLE_LATENT_ENTROPY_PLUGIN
  32
  33  ifneq ($(PLUGINCC),)
  34    # SANCOV_PLUGIN can be only in CFLAGS_KCOV because avoid duplication.
  35    GCC_PLUGINS_CFLAGS := $(filter-out $(SANCOV_PLUGIN), $(GCC_PLUGINS_CFLAGS))
  36  endif
  37
  38  KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
  39  GCC_PLUGIN := $(gcc-plugin-y)
  40  GCC_PLUGIN_SUBDIR := $(gcc-plugin-subdir-y)
  41endif
  42
  43# If plugins aren't supported, abort the build before hard-to-read compiler
  44# errors start getting spewed by the main build.
  45PHONY += gcc-plugins-check
  46gcc-plugins-check: FORCE
  47ifdef CONFIG_GCC_PLUGINS
  48  ifeq ($(PLUGINCC),)
  49    ifneq ($(GCC_PLUGINS_CFLAGS),)
  50      ifeq ($(call cc-ifversion, -ge, 0405, y), y)
  51        $(Q)$(srctree)/scripts/gcc-plugin.sh --show-error "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)" || true
  52        @echo "Cannot use CONFIG_GCC_PLUGINS: your gcc installation does not support plugins, perhaps the necessary headers are missing?" >&2 && exit 1
  53      else
  54        @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
  55      endif
  56    endif
  57  endif
  58endif
  59        @:
  60
  61# Actually do the build, if requested.
  62PHONY += gcc-plugins
  63gcc-plugins: scripts_basic gcc-plugins-check
  64ifdef CONFIG_GCC_PLUGINS
  65        $(Q)$(MAKE) $(build)=scripts/gcc-plugins
  66endif
  67        @:
  68