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-rw-r--r--scripts/Makefile.gcc-plugins43
1 files changed, 43 insertions, 0 deletions
diff --git a/scripts/Makefile.gcc-plugins b/scripts/Makefile.gcc-plugins
new file mode 100644
index 000000000000..5e22b60589c1
--- /dev/null
+++ b/scripts/Makefile.gcc-plugins
@@ -0,0 +1,43 @@
+ifdef CONFIG_GCC_PLUGINS
+ __PLUGINCC := $(call cc-ifversion, -ge, 0408, $(HOSTCXX), $(HOSTCC))
+ PLUGINCC := $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-plugin.sh "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)")
+
+ SANCOV_PLUGIN := -fplugin=$(objtree)/scripts/gcc-plugins/sancov_plugin.so
+
+ gcc-plugin-$(CONFIG_GCC_PLUGIN_CYC_COMPLEXITY) += cyc_complexity_plugin.so
+
+ ifdef CONFIG_GCC_PLUGIN_SANCOV
+ ifeq ($(CFLAGS_KCOV),)
+ # It is needed because of the gcc-plugin.sh and gcc version checks.
+ gcc-plugin-$(CONFIG_GCC_PLUGIN_SANCOV) += sancov_plugin.so
+
+ ifneq ($(PLUGINCC),)
+ CFLAGS_KCOV := $(SANCOV_PLUGIN)
+ else
+ $(warning warning: cannot use CONFIG_KCOV: -fsanitize-coverage=trace-pc is not supported by compiler)
+ endif
+ endif
+ endif
+
+ GCC_PLUGINS_CFLAGS := $(addprefix -fplugin=$(objtree)/scripts/gcc-plugins/, $(gcc-plugin-y))
+
+ export PLUGINCC GCC_PLUGINS_CFLAGS GCC_PLUGIN SANCOV_PLUGIN
+
+ ifeq ($(PLUGINCC),)
+ ifneq ($(GCC_PLUGINS_CFLAGS),)
+ ifeq ($(call cc-ifversion, -ge, 0405, y), y)
+ PLUGINCC := $(shell $(CONFIG_SHELL) -x $(srctree)/scripts/gcc-plugin.sh "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)")
+ $(warning warning: your gcc installation does not support plugins, perhaps the necessary headers are missing?)
+ else
+ $(warning warning: your gcc version does not support plugins, you should upgrade it to gcc 4.5 at least)
+ endif
+ endif
+ else
+ # SANCOV_PLUGIN can be only in CFLAGS_KCOV because avoid duplication.
+ GCC_PLUGINS_CFLAGS := $(filter-out $(SANCOV_PLUGIN), $(GCC_PLUGINS_CFLAGS))
+ endif
+
+ KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
+ GCC_PLUGIN := $(gcc-plugin-y)
+
+endif