+#ifdef __MWERKS__
+# include <stddef.h>
+#endif
+
+/*
+ WXMAC variants
+ __WXMAC_CLASSIC__ means ppc non-carbon builds, __WXMAC_CARBON__ means
+ carbon API available (mach or cfm builds) , __WXMAC_OSX__ means mach-o
+ builds, running under 10.2 + only
+*/
+#ifdef __WXMAC__
+# if defined(__MACH__)
+# define __WXMAC_OSX__
+# define __WXMAC_CARBON__ /* for backwards compat in user code still defined */
+# include <AvailabilityMacros.h>
+# ifndef MAC_OS_X_VERSION_10_4
+# define MAC_OS_X_VERSION_10_4 1040
+# endif
+# ifndef MAC_OS_X_VERSION_10_5
+# define MAC_OS_X_VERSION_10_5 1050
+# endif
+# else
+# error "only mach-o configurations are supported"
+# endif
+#endif
+
+/*
+ __WXOSX__ is a common define to wxMac (Carbon) and wxCocoa ports under OS X.
+
+ 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.
+
+ */
+#if defined(__WXMAC_OSX__) || (defined(__WXCOCOA__) && (!defined(wxUSE_BASE) || !wxUSE_BASE))
+# define __WXOSX__