Re: gcc 2.8.1

[Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>]

Tommy Andersen <tommya@post3.tele.dk> writes:

|> On Tue, 16 Jun 1998, Petr Stehlik wrote:
|> 
|> >But I noticed something else - the gcc 2.8.1 reports errors on different
|> >line numbers than they really are. It's somehow related to number of
|> >#include lines in the particular .c file. You all don't have this problem?
|> 
|> I've noticed that too.

That's a bug in the preprocessor, it does not correctly handle
newline-backslash sequences inside strings in macro expansions.  The
following patch makes it work better, but is not completely correct.


*** cccp.c.~1~	Tue Apr 14 17:30:55 1998
--- cccp.c	Tue Apr 14 17:58:42 1998
*************** handle_directive (ip, op)
*** 3926,3932 ****
  		= skip_quoted_string (xp - 1, bp, ip->lineno,
  				      NULL_PTR, NULL_PTR, NULL_PTR);
  	      while (xp != bp1)
! 		*cp++ = *xp++;
  	    }
  	    break;
  
--- 3926,3935 ----
  		= skip_quoted_string (xp - 1, bp, ip->lineno,
  				      NULL_PTR, NULL_PTR, NULL_PTR);
  	      while (xp != bp1)
! 		if (*xp == '\\' && xp + 1 != bp1 && xp[1] == '\n')
! 		  xp += 2;
! 		else
! 		  *cp++ = *xp++;
  	    }
  	    break;

-- 
Andreas Schwab                                      "And now for something
schwab@issan.informatik.uni-dortmund.de              completely different"
schwab@gnu.org