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Linux/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         @:

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