+config LMB + def_bool y + Can we plase have this changed to use: config SPARC64 + select HAVE_LMB And then in lib/Kconfig have +config HAVE_LMB + bool So we avoid creating a new variable each time we introdce LMB support. You would need to update powerpc Kconfig too of course. This way of doing it is documented in: Documenation/kbuild/kconfig.language.txt Thanks, Sam