From mboxrd@z Thu Jan  1 00:00:00 1970
From: Neil Booth <NeilB@earthling.net>
To: Ross Combs <rocombs@cs.nmsu.edu>
Cc: martin@loewis.home.cs.tu-berlin.de, gcc@gcc.gnu.org
Subject: Re: Compiler Directive to List Defined Macros?
Date: Fri, 30 Jun 2000 01:36:00 -0000
Message-id: <E137wEo-0006rn-00@monkey.rosenet.ne.jp>
References: <200006292249.QAA30985@quito.cs.nmsu.edu>
X-SW-Source: 2000-06/msg00793.html

Ross Combs wrote:-

> Hmm.  That is how I originally tried to use it.  It is also annoying that
> I couldn't find a way to stringize __LINE__ and then concatenate it to
> __FILE__.  But such things can be worked around.

You mean to get output like "\"myfile.c\": 200"?  If so, the following
should work:

#define str(x) #x
#define xstr(x) str(x)
xstr(__FILE__: __LINE__)

Or if you want "myfile.c: 200", i.e. without the inner quotes, try

__FILE__ ": " xstr(__LINE__)

If you don't understand why this works, info cpp should help.  If it
doesn't, please help us to improve the docs!

Neil.