Is there a tool that takes a c/cpp file with macros as input and outputs the file with all macros expanded?

i could need something like this so I can easier read the arm core.

Yes, you can usually use the compiler to do it. If you have gcc try this:

gcc file.c -E -o file_expanded.c

It won't matter if the file is actually C/C++, so long as its preprocessor directives are valid.

Ah, thanks.

I just found out even Microsoft's compiler can do that:

cl /P /C

It will generate a text file


Here are the arm & thumb cores, preprocessed:
http://spacy51.sp.funpic.de/VBA-M/prepro...ocessed.7z

If you want anyone to read expanded code I suggest you run it through some kind of formatting tool like indent. Macros suck because they're single line, so expansions contain a bunch of really long lines :/

It'd be great if mainstream C compilers had extensions to support multi-line macros.. no more line joins would be necessary, macro line numbers could be forwarded to compilation error code - good luck finding an error in a several thousand line macro - and they could be expanded in a way that doesn't look as awful.

If you really looking to format code, grab a copy of Source Styler, it can be configured to whatever indentation style you prefer.