+#if defined(__MWERKS__) && defined(__MACH__)
+ #ifndef WXWIN_OS_DESCRIPTION
+ #define WXWIN_OS_DESCRIPTION "MacOS X"
+ #endif
+ #ifndef HAVE_NANOSLEEP
+ #define HAVE_NANOSLEEP
+ #endif
+ #ifndef HAVE_UNAME
+ #define HAVE_UNAME
+ #endif
+
+ // our configure test believes we can use sigaction() if the function is
+ // available but Metrowekrs with MSL run-time does have the function but
+ // doesn't have sigaction struct so finally we can't use it...
+ #ifdef __MSL__
+ #undef wxUSE_ON_FATAL_EXCEPTION
+ #define wxUSE_ON_FATAL_EXCEPTION 0
+ #endif