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