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