+
+ DO NOT use this define in base library code. Although wxMac has its own
+ private base library (and thus __WXOSX__,__WXMAC__ and related defines are
+ valid there), wxCocoa shares its library with other ports like wxGTK and wxX11.
+
+ To keep wx authors from screwing this up, only enable __WXOSX__ for wxCocoa when
+ not compiling the base library. We determine this by first checking if
+ wxUSE_BASE is not defined. If it is not defined, then we're not buildling
+ the base library, and possibly not building wx at all (but actually building
+ user code that's using wx). If it is defined then we must check to make sure
+ it is not true. If it is true, we're building base.
+
+ If you want it in the common darwin base library then use __DARWIN__. You
+ can use any Darwin-available libraries like CoreFoundation but please avoid
+ using OS X libraries like Carbon or CoreServices.
+