I'm running 2.1.4 on a well-patched ia32-linux-rh7.2 box; the only oddity being that 'master' spits out "imapd: invalid option -- s" every time it tries to start up "imapd -s". You get the same message if you go to the build directory and type 'imap/imapd -s' thusly:
partain$ ./imap/imapd -s ./imap/imapd: invalid option -- s (I don't know if this is not supposed to work :-). I assume the message is out of getopt, and I've checked that I really am linking in the one from glibc (2.0, I believe). I know this has come up in the past, and patches went in to deal with thread-friendliness, or some such. My own attempts to debug it w/ GDB didn't go too well, what with being an old guy who grew up in a pre-threads world :-) If I can be of assistance to someone who wants to dig into this and figure out what's going on, please yell back. Regards, Will