My next announcement is a loathing of mork that I had previously not thought possible. The number of calls needed to construct an iterative property bag was at first off-putting. Then came the annoyances of yarns: some yarn functions manage the initialization themselves, others except the user to do so. Of course, the documentation doesn't distinguish between these two types. Finally, there seems to a bug in mork that omits the first cell in a cursor iteration. My complaints are duly noted in comments in my patch.
Announcement number 3 is a kudos to Taras Glek and his Dehydra GCC. It's magic! After spending an afternoon in working with me to get it working (note: disabling GCC's bootstrap helps cut down on build times), I finally got it working to the point where I discovered that it didn't handle virtual functions too well. He got that working this morning (!!!), and so now I generated a listing of every place where the deprecated attributes on nsIAbCard are used in C++ files in mailnews. All 487 of them, all but about 100 of which are located in nsAbCardProperty or nsAddrDatabase.
Also today, I tested out Neil's --disable-static-mail option for Thunderbird, and it works fine enough, so that should become the default for debug builds soon. It also makes building much easier; I should now try and get that into my automagic build script for mozilla.