Objective-C是否编译为本机代码或字节代码？ [英] Does Objective-C compile to native code or byte-code?

问题描述

在OS X上，Objective-C是否编译为本地代码或字节码？

On OS X, does Objective-C compile to native code or byte-code?

Objective-C程序可以在Linux上编译吗？

Can Objective-C programs be compiled on Linux?

推荐答案

你可以在Linux上编译ObjC程序（通用的GCC会很乐意支持ObjC，虽然它使用的是不同于Apple的运行时库）。对于类似Cocoa（即派生自Cocoa）的跨平台API，它将乐于在Linux上工作，并允许在OS X和Linux之间传递一些代码，请查看GNUstep： http://www.gnustep.org

Objective-C is compiled to native code by either GCC or LLVM[*]. You can compile ObjC programs on Linux (the generic GCC will happily support ObjC, though it uses a different runtime library than either of the Apple ones). For a cross-platform API similar to Cocoa (i.e. derived from Cocoa) which will happily work on Linux and let you port some code between OS X and Linux, check out GNUstep: http://www.gnustep.org

[*]事实上，LLVM内部编译Objective-C到内部位码表示，然后为目标机器编码，所以也许答案是两个...

[*]In fact, LLVM internally compiles the Objective-C to an internal bitcode representation, then to code for the target machine, so perhaps the answer is "both"…

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