objc4-723 Building objc runtime lib with source code! Objc4-723 is the latest version! Dependencies objc4-723 Libc-825.40.1 dyld-519.2.1 libauto-187 libclosure-67 libdispatch-913.1.6 libplatform-161 libpthread-301.1.6 Libsystem-1252.zip xnu-4570.1.46 Usage target -> objc-debug