1# SPDX-License-Identifier: GPL-2.0
2ifdef 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 := $(gcc-plugin-subdir-y)
47endif
48
49# If plugins aren't supported, abort the build before hard-to-read compiler
50# errors start getting spewed by the main build.
51PHONY += gcc-plugins-check
52gcc-plugins-check: FORCE
53ifdef CONFIG_GCC_PLUGINS
54  ifeq ($(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
64endif
65	@:
66
67# Actually do the build, if requested.
68PHONY += gcc-plugins
69gcc-plugins: scripts_basic gcc-plugins-check
70ifdef CONFIG_GCC_PLUGINS
71	$(Q)$(MAKE) $(build)=scripts/gcc-plugins
72endif
73	@:
74