scripts/Makefile.gcc-plugins

   1 ifdef 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 := $(gcc-plugin-subdir-y)
  34 endif
  35
  36 # If plugins aren't supported, abort the build before hard-to-read compiler
  37 # errors start getting spewed by the main build.
  38 PHONY += gcc-plugins-check
  39 gcc-plugins-check: FORCE
  40 ifdef CONFIG_GCC_PLUGINS
  41   ifeq ($(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
  51 endif
  52         @:
  53
  54 # Actually do the build, if requested.
  55 PHONY += gcc-plugins
  56 gcc-plugins: scripts_basic gcc-plugins-check
  57 ifdef CONFIG_GCC_PLUGINS
  58         $(Q)$(MAKE) $(build)=scripts/gcc-plugins
  59 endif
  60         @: