Oh, that part of the code was relying on pwd.h defining _PASSWORD_EFMT1. I just removed that since 2ch trips never use extended crypt(); I reuploaded the archive.

What kind of gimped libc doesn't have strcasestr()? I don't know of any simple replacement for that, but changing CFLAGS to
CFLAGS="-O3 -DCASE_SENSITIVE"
will make it compile with strstr(), at least.