scripts/Makefile.gcc-plugins

   1 # SPDX-License-Identifier: GPL-2.0
   2 ifdef CONFIG_GCC_PLUGINS
   3   __PLUGINCC := $(call cc-ifversion, -ge, 0408, $(HOSTCXX), $(HOSTCC))
   4   PLUGINCC := $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-plugin.sh "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)")
   5
   6   SANCOV_PLUGIN := -fplugin=$(objtree)/scripts/gcc-plugins/sancov_plugin.so
   7
   8   gcc-plugin-$(CONFIG_GCC_PLUGIN_CYC_COMPLEXITY)        += cyc_complexity_plugin.so
   9
  10   gcc-plugin-$(CONFIG_GCC_PLUGIN_LATENT_ENTROPY)        += latent_entropy_plugin.so
  11   gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_LATENT_ENTROPY) += -DLATENT_ENTROPY_PLUGIN
  12   ifdef CONFIG_GCC_PLUGIN_LATENT_ENTROPY
  13     DISABLE_LATENT_ENTROPY_PLUGIN                       += -fplugin-arg-latent_entropy_plugin-disable
  14   endif
  15
  16   ifdef CONFIG_GCC_PLUGIN_SANCOV
  17       # It is needed because of the gcc-plugin.sh and gcc version checks.
  18       gcc-plugin-$(CONFIG_GCC_PLUGIN_SANCOV)           += sancov_plugin.so
  19
  20       ifeq ($(PLUGINCC),)
  21         $(warning warning: cannot use CONFIG_KCOV: -fsanitize-coverage=trace-pc is not supported by compiler)
  22       endif
  23   endif
  24
  25   gcc-plugin-$(CONFIG_GCC_PLUGIN_STRUCTLEAK)    += structleak_plugin.so
  26   gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK_VERBOSE)     += -fplugin-arg-structleak_plugin-verbose
  27   gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL)   += -fplugin-arg-structleak_plugin-byref-all
  28   gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK)     += -DSTRUCTLEAK_PLUGIN
  29
  30   gcc-plugin-$(CONFIG_GCC_PLUGIN_RANDSTRUCT)    += randomize_layout_plugin.so
  31   gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_RANDSTRUCT)     += -DRANDSTRUCT_PLUGIN
  32   gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_RANDSTRUCT_PERFORMANCE) += -fplugin-arg-randomize_layout_plugin-performance-mode
  33
  34   GCC_PLUGINS_CFLAGS := $(strip $(addprefix -fplugin=$(objtree)/scripts/gcc-plugins/, $(gcc-plugin-y)) $(gcc-plugin-cflags-y))
  35
  36   export PLUGINCC GCC_PLUGINS_CFLAGS GCC_PLUGIN GCC_PLUGIN_SUBDIR
  37   export DISABLE_LATENT_ENTROPY_PLUGIN
  38
  39   ifneq ($(PLUGINCC),)
  40     # SANCOV_PLUGIN can be only in CFLAGS_KCOV because avoid duplication.
  41     GCC_PLUGINS_CFLAGS := $(filter-out $(SANCOV_PLUGIN), $(GCC_PLUGINS_CFLAGS))
  42   endif
  43
  44   KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
  45   GCC_PLUGIN := $(gcc-plugin-y)
  46   GCC_PLUGIN_SUBDIR := $(gcc-plugin-subdir-y)
  47 endif
  48
  49 # If plugins aren't supported, abort the build before hard-to-read compiler
  50 # errors start getting spewed by the main build.
  51 PHONY += gcc-plugins-check
  52 gcc-plugins-check: FORCE
  53 ifdef CONFIG_GCC_PLUGINS
  54   ifeq ($(PLUGINCC),)
  55     ifneq ($(GCC_PLUGINS_CFLAGS),)
  56       ifeq ($(call cc-ifversion, -ge, 0405, y), y)
  57         $(Q)$(srctree)/scripts/gcc-plugin.sh --show-error "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)" || true
  58         @echo "Cannot use CONFIG_GCC_PLUGINS: your gcc installation does not support plugins, perhaps the necessary headers are missing?" >&2 && exit 1
  59       else
  60         @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
  61       endif
  62     endif
  63   endif
  64 endif
  65         @:
  66
  67 # Actually do the build, if requested.
  68 PHONY += gcc-plugins
  69 gcc-plugins: scripts_basic gcc-plugins-check
  70 ifdef CONFIG_GCC_PLUGINS
  71         $(Q)$(MAKE) $(build)=scripts/gcc-plugins
  72 endif
  73         @: