AS_MAX_PORTABILITY isn't enough, since the default plugins uses calling conventions other than "asCALL_GENERIC" which is the only one that the "dummy" implementation handles...
What I did was to add a PowerPC stub implementation (similar to the x86 one), that registers all of the various calling conventions. It only *handles* the generic one (for now), though. The PPC asm is TODO.
This new file (as_callfunc_ppc.cpp) is in the SVN, Patch #824.
Thanks for the pointers to wxAUI and wxFlatNotebook, those probably needs fixing as well as the replacement class for wxPopupDialog. Another thing that occurs again and again is that headers are added to the precompiled version, but misspelled or wrong in the non-precompile. That should be fixable on the Windows/Linux side as well, though. (Just do the test builds both with and without the precomps)
Some widgets also need bigger font defaults, to be readable.
It's all good, but I will make some efforts to fix issues before I post another progress update.