#include <Foundation/Foundation.h> int some_global_to_stop_libtool_warning = 5; @interface NSObject (stuff) - (void) mycatmethod1; @end @implementation NSObject (stuff) - (void) mycatmethod1 { } @end @interface NSObject (other) - (void) mycatmethod2; @end @implementation NSObject (other) - (void) mycatmethod2 { } @end