[mythtv] Virtual thunk errors when creating libmythtv

[Nigel Pearson]

	I have gotten most of MythTV-0.15 (CVS from a few days ago)
to build under Mac OS X (only a few config and #ifdef changes req'd).
However, when trying to link the last lib:

c++ -dynamiclib -install_name   libmythtv-0.15.0.dylib -o 
libmythtv-0.15.0.15.0.dylib cc.o vbi.o hamm.o lang.o commercial_skip.o 
frequencies.o guidegrid.o infodialog.o infostructs.o jitterometer.o 
minilzo.o NuppelVideoPlayer.o osd.o osdtypes.o programinfo.o 
recordingprofile.o remoteencoder.o remoteutil.o RingBuffer.o RTjpegN.o 
scheduledrecording.o ttfont.o tv_play.o yuv2rgb.o progfind.o 
nuppeldecoder.o avformatdecoder.o recorderbase.o filtermanager.o 
proglist.o videooutbase.o videoout_null.o xbox.o dbcheck.o 
profilegroup.o udpnotify.o channeleditor.o channelsettings.o 
osdsurface.o osdlistbtntype.o blend.o datadirect.o fifowriter.o vsync.o 
videosource.o moc_guidegrid.o moc_infodialog.o moc_osd.o moc_osdtypes.o 
moc_profilegroup.o moc_recordingprofile.o moc_scheduledrecording.o 
moc_tv_play.o moc_progfind.o moc_proglist.o moc_xbox.o moc_udpnotify.o 
moc_channeleditor.o moc_channelsettings.o moc_osdlistbtntype.o 
moc_videosource.o  -L/Volumes/Backups/qt/lib -L../libmyth 
-L../libavcodec -L../libavformat -lmyth-0.15 -lmythavcodec-0.15 
-lmythavformat-0.15 -lfreetype -lmp3lame -lqt-mt
ld: Undefined symbols:
virtual thunk [v:0,-16] to Configurable::className() const
...
virtual thunk [v:0,-20] to Configurable::qt_cast(char const*)
...
virtual thunk [v:0,-20] to SelectSetting::className() const

et cetera.


	Now, I haven't even found a good definition of WTF a
"virtual thunk" is, let alone why library creation is creating one.


	There is a message on TrollTech's site about this, but they say
it is to do with static linking, which we are _not_ doing here.
Any suggestions?

--
Nigel Pearson, nigel at ind.tansu.com.au | "People say I'm strange, does it
Telstra BI&D, Sydney, Australia       |        make me a stranger?
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