wxWidgets on OS X...

Using the latest version from SVN... it doesn't work out of the box. Here are some notes (once I've got all this working I'll submit TRAC bugs or something similar to wxWidgets...)

1. I can't use `wx-config --cppflags` in xcode for cpp flags. So I need to do it manually. Maybe xcode has a workaround instead of using execution quotes....
2. wx-config returns a __WX_MAC__ define, a build then results in an #error No Target defined. It turns out now with the cocoa split, WX_MAC is no longer used, instead I need to manually set the target to be __WXOSX_COCOA__ (or _CARBON or _IPHONE etc). Maybe wx-config needs updating...
   

It builds! Lets see if it works...