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From: ark@alice.UucP (Andrew Koenig)
Newsgroups: net.lang.c
Subject: Re: How about a predefined #FILE, #PATH and #FUNCTION for C?
Message-ID: <4884@alice.UUCP>
Date: Mon, 27-Jan-86 14:16:35 EST
Article-I.D.: alice.4884
Posted: Mon Jan 27 14:16:35 1986
Date-Received: Tue, 28-Jan-86 06:27:38 EST
References: <313@yale.ARPA>
Organization: Bell Labs, Murray Hill
Lines: 13

> To explain what I mean...
> definition by example:
> 
>     #PATH ==> /usr/fred/hello.c
>     #FILE ==> hello.c
>     #FUNCTION ==> main
> 
>     (N.B.: no quotation marks.)
> 

Most versions of the C preprocessor have (undocumented) pre-defined
macros called __FILE__ and __LINE__ that do close to what you want.
See /usr/include/assert.h for an example of usage.