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Date: Mon, 30 Dec 2002 20:54:00 -0000
From: Stephen Lindholm <lindholm@CS.Stanford.EDU>
To: Neil Booth <neil@daikokuya.co.uk>
cc: gcc@gcc.gnu.org
Subject: Re: Change in preprocessor behavior
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I'm using the version of gcc which came with Mac OS X, and I compared it
to the old version of gcc installed on the Solaris mail server. I did not
install either of the two compilers myself.

I did cut and paste the command line and output exactly as they were in
the terminal window.

I guess the OS X compiler came out of the box configured differently than
I expected. I know it has some modifications to support Mac programming,
but I did not expect the preprocessor to be configured differently. I
guess I will just have to use a different computer for my preprocessing or
install another version of gcc.

Thank you for your help.


On Mon, 30 Dec 2002, Neil Booth wrote:

> Stephen Lindholm wrote:-
> 
> > thrush:~% cpp test2
> > # 1 "test2"
> > 
> >       
> > struct command commands[] =
> > {
> >   { #quit, quit ## _command },
> >   { #help, help ## _command },
> > };
> 
> Contrary to your claim, I suspect you're using cpp -traditional, no?
> 
> Traditional preprocessors did not support # and ##, and 3.1 is more
> "correct" in this respect.  FWIW 3.3 has another new implementation of
> traditional preprocessing which is the most faithful of GCC's
> implementations to true traditional preprocessing.
> 
> Neil.
>