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From: cmc@rlvd.UUCP (Chris Crampton)
Newsgroups: net.lang.c++
Subject: Re: experiences porting c++ release 1 to release 2 sun-2
Message-ID: <1170@rlvd.UUCP>
Date: Fri, 14-Mar-86 05:31:22 EST
Article-I.D.: rlvd.1170
Posted: Fri Mar 14 05:31:22 1986
Date-Received: Mon, 17-Mar-86 03:41:00 EST
References: <224@ubu.warwick.UUCP>
Reply-To: cmc@rlvd.UUCP (Chris Crampton)
Organization: Rutherford Appleton Laboratory, Informatics Division, U.K.
Lines: 46

In article <224@ubu.warwick.UUCP> jeff@warwick.UUCP (Jeff Smith) writes:
>...
>
>The following patch to lex.c fixes a bug to do with cfront's
>action on preprocessor lines (discovered when I forgot to run
>cpp first). Without the fix, cfront will faithfully transcribe
>lines beginning with # for the preprocessor, except for the second
>character, which will be turned into an 'i'.
>
>*** /usr/src/cmd/c++/src/lex.c	Mon Nov 25 15:53:43 1985
>--- lex.c	Thu Mar  6 15:49:48 1986
>***************
>*** 1001,1006
>  			break;
>  		default:	/* pass #rubbish through */
>  			pch('#');
>  			pch('i');
>  			while (get(c) != '\n') pch(c);
>  			pch('\0');
>
>--- 1001,1009 -----
>  			break;
>  		default:	/* pass #rubbish through */
>  			pch('#');
>+ #ifdef	PCHFIX
>+ 			pch(c);
>+ #else	!PCHFIX
>  			pch('i');
>  #endif	PCHFIX
>  			while (get(c) != '\n') pch(c);


To get the intended effect for "#..." preprocessor lines, then a:

		start_txt();

is needed just before the ``pch('#');'' in the above fix for lex.c.
The result of not putting this is that for every consecutive preprocessor
line, a preprocessor line is output; only its the wrong one. In fact the
first one is output repeatedly!
-- 
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