Hi Masahiro, If I copy a config with CONFIG_GCC_PLUGINS to another system which doesn't have the gcc-plugin-devel package, it gets silently disabled by "make olddefconfig". I've seen multiple cases lately where this is causing confusion. I suspect the problem is getting worse with recent added support for a variety of toolchains and toolchain-dependent features. Would it be possible to have an error (or at least a warning) in this case? For example, a "depends-error" which triggers an error if its failure would disable a feature? -- Josh