Re: toolchain/45138 (stdarg.h: Deficiency in va_arg handling of array arguments.)

[Wolfgang Solfrank <Wolfgang%Solfrank.net@localhost>]

The following reply was made to PR toolchain/45138; it has been noted by GNATS.

From: Wolfgang Solfrank <Wolfgang%Solfrank.net@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: dholland%NetBSD.org@localhost
Subject: Re: toolchain/45138 (stdarg.h: Deficiency in va_arg handling of array
 arguments.)
Date: Tue, 04 Oct 2011 16:05:17 +0200

 Hi,
 
 > Does gcc 4.5 need this patch? If so, please send it upstream...
 
 Yes, gcc 4.5 still has the problem.
 
 I did already submit a PR to gcc bugzilla (see
 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50581), however,
 it seems that they don't want to change gcc in this direction,
 as behaviour when passing an array type to va_arg is obviously
 undefined according to the standard.  They might add a
 warning/error if array types are passed to va_arg.
 
 My real problem with this is that this prohibits portable code
 from passing some va_list recursively, as va_list is defines as
 a one element array on some architectures.
 
 Ciao,
 Wolfgang
 -- 
 Wolfgang%Solfrank.net@localhost                                Wolfgang 
Solfrank