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)")
6 SANCOV_PLUGIN := -fplugin=$(objtree)/scripts/gcc-plugins/sancov_plugin.so
8 gcc-plugin-$(CONFIG_GCC_PLUGIN_CYC_COMPLEXITY) += cyc_complexity_plugin.so
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
16 ifdef CONFIG_GCC_PLUGIN_SANCOV
17 ifeq ($(CFLAGS_KCOV),)
18 # It is needed because of the gcc-plugin.sh and gcc version checks.
19 gcc-plugin-$(CONFIG_GCC_PLUGIN_SANCOV) += sancov_plugin.so
22 CFLAGS_KCOV := $(SANCOV_PLUGIN)
24 $(warning warning: cannot use CONFIG_KCOV: -fsanitize-coverage=trace-pc is not supported by compiler)
29 gcc-plugin-$(CONFIG_GCC_PLUGIN_STRUCTLEAK) += structleak_plugin.so
30 gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK_VERBOSE) += -fplugin-arg-structleak_plugin-verbose
31 gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL) += -fplugin-arg-structleak_plugin-byref-all
32 gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK) += -DSTRUCTLEAK_PLUGIN
34 gcc-plugin-$(CONFIG_GCC_PLUGIN_RANDSTRUCT) += randomize_layout_plugin.so
35 gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_RANDSTRUCT) += -DRANDSTRUCT_PLUGIN
36 gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_RANDSTRUCT_PERFORMANCE) += -fplugin-arg-randomize_layout_plugin-performance-mode
38 GCC_PLUGINS_CFLAGS := $(strip $(addprefix -fplugin=$(objtree)/scripts/gcc-plugins/, $(gcc-plugin-y)) $(gcc-plugin-cflags-y))
40 export PLUGINCC GCC_PLUGINS_CFLAGS GCC_PLUGIN GCC_PLUGIN_SUBDIR
41 export SANCOV_PLUGIN DISABLE_LATENT_ENTROPY_PLUGIN
44 # SANCOV_PLUGIN can be only in CFLAGS_KCOV because avoid duplication.
45 GCC_PLUGINS_CFLAGS := $(filter-out $(SANCOV_PLUGIN), $(GCC_PLUGINS_CFLAGS))
48 KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
49 GCC_PLUGIN := $(gcc-plugin-y)
50 GCC_PLUGIN_SUBDIR := $(gcc-plugin-subdir-y)
53 # If plugins aren't supported, abort the build before hard-to-read compiler
54 # errors start getting spewed by the main build.
55 PHONY += gcc-plugins-check
56 gcc-plugins-check: FORCE
57 ifdef CONFIG_GCC_PLUGINS
59 ifneq ($(GCC_PLUGINS_CFLAGS),)
60 # Various gccs between 4.5 and 5.1 have bugs on powerpc due to missing
61 # header files. gcc <= 4.6 doesn't work at all, gccs from 4.8 to 5.1 have
62 # issues with 64-bit targets.
63 ifeq ($(ARCH),powerpc)
64 ifeq ($(call cc-ifversion, -le, 0501, y), y)
65 @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
68 ifeq ($(call cc-ifversion, -ge, 0405, y), y)
69 $(Q)$(srctree)/scripts/gcc-plugin.sh --show-error "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)" || true
70 @echo "Cannot use CONFIG_GCC_PLUGINS: your gcc installation does not support plugins, perhaps the necessary headers are missing?" >&2 && exit 1
72 @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
79 # Actually do the build, if requested.
81 gcc-plugins: scripts_basic gcc-plugins-check
82 ifdef CONFIG_GCC_PLUGINS
83 $(Q)$(MAKE) $(build)=scripts/gcc-plugins