// child process. The return valus is port-specific.
extern int wxAddProcessCallback(wxEndProcessData *proc_data, int fd);
+#if defined(__DARWIN__)
// For ports (e.g. DARWIN) which can add callbacks based on the pid
extern int wxAddProcessCallbackForPid(wxEndProcessData *proc_data, int pid);
+#endif
#endif // _WX_UNIX_EXECUTE_H