viewing code while respecting defines

[Michael]

On 2018-09-10, at 9:15 AM, Jan Stary <hans at stare.cz> wrote:

> On Sep 10 08:24:39, ken.cunningham.webuse at gmail.com wrote:
>> I don't know if I asked this correctly, and it's not macports-specific, but I don't know where else to ask.
>> 
>> Some of the code I'm trying to tweak (llvm-N, webkit2-gtk-N, etc) has a lot of #defines in it to modify code paths for various OS versions.
>> 
>> It can get pretty mind-bending to try to follow the code path.
>> 
>> Is there any editor that shows you somewhat more clearly what code path you will be following with certain sets of defines?
> 
> cpp(1)

Is there a way to tell CPP to only expand compile-time determinable #ifdef's, and not macro expansion? The standard IO library, for example, gets pretty hard to read once expanded.

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