See http://trac.wxwidgets.org/ticket/14029 for a discussion of the problems it causes when using non-Apple compiler. Even for Apple's GCC, it does nothing these days and we no longer support OS X 10.3, so there's no point in continuing to use it. Fixes #14029. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71314 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775