gcc-plugins: test plugin support in Kconfig and clean up Makefile
Run scripts/gcc-plugin.sh from Kconfig so that users can enable
GCC_PLUGINS only when the compiler supports building plugins.
Kconfig defines a new symbol, PLUGIN_HOSTCC. This will contain
the compiler (g++ or gcc) used for building plugins, or empty
if the plugin can not be supported at all.
This allows us to remove all ugly testing in Makefile.gcc-plugins.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Kees Cook <keescook@chromium.org>
diff --git a/arch/Kconfig b/arch/Kconfig
index 2c7c3cf..e4a47d6 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -398,6 +398,15 @@
See Documentation/prctl/seccomp_filter.txt for details.
+preferred-plugin-hostcc := $(if-success,[ $(gcc-version) -ge 40800 ],$(HOSTCXX),$(HOSTCC))
+
+config PLUGIN_HOSTCC
+ string
+ default "$(shell,$(srctree)/scripts/gcc-plugin.sh "$(preferred-plugin-hostcc)" "$(HOSTCXX)" "$(CC)")"
+ help
+ Host compiler used to build GCC plugins. This can be $(HOSTCXX),
+ $(HOSTCC), or a null string if GCC plugin is unsupported.
+
config HAVE_GCC_PLUGINS
bool
help
@@ -407,6 +416,7 @@
menuconfig GCC_PLUGINS
bool "GCC plugins"
depends on HAVE_GCC_PLUGINS
+ depends on PLUGIN_HOSTCC != ""
depends on !COMPILE_TEST
help
GCC plugins are loadable modules that provide extra features to the