CLang
编译成可执行文件
- clang -fobjc-arc -framework Foundation hello.m -o nihau
写成c++文件
- clang -rewrite-objc hello.m
- clang -x objective-c -rewrite-objc -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk xxxxx.m