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78

answers:

2
+4  Q: 

Objective-C preprocessor available?

Does anyone know if the source code for Objective-C is still available from when it was just a pre-processor? Would be curious to see how it was implemented back then.

Thanks.

+3  A: 

The only source-available implementation of Objective-C is GCC. The GCC archive at ftp.gnu.org/pub/gnu/gcc contains versions back to 1.42, while ftp.gnu.org/pub/old-gnu/gcc has some versions slightly older than that. The earliest implementations within GCC were, I believe, preprocessors, so that's probably your best bet.

Uncle Mikey  2010-07-28 20:55:34
+2  A: 

The Clang LLVM rewriter (rewriter is documented below there) can rewrite Objective-C into C (and is being used by some to compile Objective-C for the Xbox and Windows).

Some discussion here:

http://permalink.gmane.org/gmane.comp.compilers.llvm.devel/32019

bbum  2010-07-28 23:11:19

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