Re: c/9700: va_start gets __offset wrong in some situations

[Wolfgang Bangerth <bangerth@ticam.utexas.edu>]

The following reply was made to PR c/9700; it has been noted by GNATS.

From: Wolfgang Bangerth <bangerth@ticam.utexas.edu>
To: Aron Griffis <agriffis@gentoo.org>
Cc: bangerth@dealii.org, <bjb@gentoo.org>, <gcc-bugs@gcc.gnu.org>,
   <msterret@coat.com>, <wwoods@gentoo.org>, <gcc-gnats@gcc.gnu.org>
Subject: Re: c/9700: va_start gets __offset wrong in some situations
Date: Fri, 14 Feb 2003 20:29:14 -0600 (CST)

 On Fri, 14 Feb 2003, Aron Griffis wrote:
 
 > bangerth@dealii.org wrote:[Fri Feb 14 2003, 09:10:12PM EST]
 > >     Admittedly I only looked at the program given in the first
 > >     report. So, let me ask again: I think that that program
 > >     does exactly what should be expected, is this right? If so,
 > >     the comment in that program about expectations is wrong.
 > 
 > Ah, this is where we're not communicating.  The comment is accurate.  I
 > can rephrase it as follows, perhaps this is more clear:
 > 
 >     /*
 >      * This is the first invocation of va_arg.  The argument list is as
 >      * follows:
 >      *
 >      * 		a = 0
 >      * 		b = 0
 >      * 		c = 0
 >      * 		d = 0
 >      * 		e = 0
 >      * 		ap = { undef, undef }
 >      * 		first_custom = "one"
 >      * 		... = "two", "three"
 >      *
 >      * Therefore va_arg should return "two".  However in this example it
 >      * erroneously returns "one", which is first_custom.
 >      */
 
 OK. It seems as if I misread it. 
 
 In any case, the program does as expected on my x86 linux machine. I can't
 compile the second program on my machine, as you mention. So I assume that
 this is something that is specific to the alpha port. I'll change the 
 synopsis accordingly, and leave this to the port maintainers.
 
 Thanks for keeping me on track ;-)
   Wolfgang
 
 -------------------------------------------------------------------------
 Wolfgang Bangerth             email:            bangerth@ticam.utexas.edu
                               www: http://www.ticam.utexas.edu/~bangerth/