In short, the compiler crashes in the imap-voicemail section, complaining about not being able to read symbols and recommending a recompile with -fPIC. This isn't as drastic an issue as it looks. Just find the EXTRACFLAGS line in the Makefile for the IMAP code and make it look like "EXTRACFLAGS=-fPIC".
I've added these notes to the IMAP Interface for Voicemail notes in the wiki.
Oh, and BTW, the post freeze is delayed due to issues with the new system.