Boris, could you please test it and tell me if cupsd works again for
you too? You just need to rebuild/reinstall the libc, not cups.
I've rebuild the world (because I had to use gcc-built world for
obvious reason) and now smartd works (can't test cupsd for now).
BTW, the port devel/ORBit2 which segfaulted both with clang and
gcc is built fine now. Thanks!