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_GCC_PLUGIN_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         $(warning warning: cannot use CONFIG_KCOV: -fsanitize-coverage=trace-pc is not supported by compiler)
  24       endif
  25     endif
  26   endif
  27
  28   gcc-plugin-$(CONFIG_GCC_PLUGIN_STRUCTLEAK)    += structleak_plugin.so
  29   gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK_VERBOSE)     += -fplugin-arg-structleak_plugin-verbose
  30   gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL)   += -fplugin-arg-structleak_plugin-byref-all
  31   gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK)     += -DSTRUCTLEAK_PLUGIN
  32
  33   gcc-plugin-$(CONFIG_GCC_PLUGIN_RANDSTRUCT)    += randomize_layout_plugin.so
  34   gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_RANDSTRUCT)     += -DRANDSTRUCT_PLUGIN
  35   gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_RANDSTRUCT_PERFORMANCE) += -fplugin-arg-randomize_layout_plugin-performance-mode
  36
  37   GCC_PLUGINS_CFLAGS := $(strip $(addprefix -fplugin=$(objtree)/scripts/gcc-plugins/, $(gcc-plugin-y)) $(gcc-plugin-cflags-y))
  38
  39   export PLUGINCC GCC_PLUGINS_CFLAGS GCC_PLUGIN GCC_PLUGIN_SUBDIR
  40   export SANCOV_PLUGIN DISABLE_LATENT_ENTROPY_PLUGIN
  41
  42   ifneq ($(PLUGINCC),)
  43     # SANCOV_PLUGIN can be only in CFLAGS_KCOV because avoid duplication.
  44     GCC_PLUGINS_CFLAGS := $(filter-out $(SANCOV_PLUGIN), $(GCC_PLUGINS_CFLAGS))
  45   endif
  46
  47   KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
  48   GCC_PLUGIN := $(gcc-plugin-y)
  49   GCC_PLUGIN_SUBDIR := $(gcc-plugin-subdir-y)
  50 endif
  51
  52 # If plugins aren't supported, abort the build before hard-to-read compiler
  53 # errors start getting spewed by the main build.
  54 PHONY += gcc-plugins-check
  55 gcc-plugins-check: FORCE
  56 ifdef CONFIG_GCC_PLUGINS
  57   ifeq ($(PLUGINCC),)
  58     ifneq ($(GCC_PLUGINS_CFLAGS),)
  59       # Various gccs between 4.5 and 5.1 have bugs on powerpc due to missing
  60       # header files. gcc <= 4.6 doesn't work at all, gccs from 4.8 to 5.1 have
  61       # issues with 64-bit targets.
  62       ifeq ($(ARCH),powerpc)
  63         ifeq ($(call cc-ifversion, -le, 0501, y), y)
  64           @echo "Cannot use CONFIG_GCC_PLUGINS: plugin support on gcc <= 5.1 is buggy on powerpc, please upgrade to gcc 5.2 or newer" >&2 && exit 1
  65         endif
  66       endif
  67       ifeq ($(call cc-ifversion, -ge, 0405, y), y)
  68         $(Q)$(srctree)/scripts/gcc-plugin.sh --show-error "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)" || true
  69         @echo "Cannot use CONFIG_GCC_PLUGINS: your gcc installation does not support plugins, perhaps the necessary headers are missing?" >&2 && exit 1
  70       else
  71         @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
  72       endif
  73     endif
  74   endif
  75 endif
  76         @:
  77
  78 # Actually do the build, if requested.
  79 PHONY += gcc-plugins
  80 gcc-plugins: scripts_basic gcc-plugins-check
  81 ifdef CONFIG_GCC_PLUGINS
  82         $(Q)$(MAKE) $(build)=scripts/gcc-plugins
  83 endif
  84         @: