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   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 := $(gcc-plugin-subdir-y)
  41 endif
  42
  43 # If plugins aren't supported, abort the build before hard-to-read compiler
  44 # errors start getting spewed by the main build.
  45 PHONY += gcc-plugins-check
  46 gcc-plugins-check: FORCE
  47 ifdef CONFIG_GCC_PLUGINS
  48   ifeq ($(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
  58 endif
  59         @:
  60
  61 # Actually do the build, if requested.
  62 PHONY += gcc-plugins
  63 gcc-plugins: scripts_basic gcc-plugins-check
  64 ifdef CONFIG_GCC_PLUGINS
  65         $(Q)$(MAKE) $(build)=scripts/gcc-plugins
  66 endif
  67         @: