Noel, I can successfully build LO on i686 with LDFLAGS="-latomic" This is overkill. I think patch is needed for the cuckoo module that you added in https://cgit.freedesktop.org/libreoffice/core/commit/?id=3749d9af3745 for IA-32 clang. I attempted to do this but I'm not family with how this patching/external system works. If you could give me some tips or something to try, I'd be happy to test it out for you. -Luke