If anyone is interested in the kconfig functionality outside of the kernel, I've rebased my portability patches on 5.15-rc7: https://github.com/build2-packaging/kconfig/tree/upstream-5.15-rc7 There is also the liblkc library and conf/qconf configurators based on this (similar to the now abandoned kconfig-frontends project): https://github.com/build2-packaging/kconfig Masahiro, if you like any of the patches, let me know and I will send them for upsteaming (I don't want to make extra noise trying all of them since most are probably not welcome): https://github.com/build2-packaging/kconfig/commits/upstream-5.15-rc7
