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

[David Holland <dholland-bugs%netbsd.org@localhost>]

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

From: David Holland <dholland-bugs%netbsd.org@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: toolchain/45138 (stdarg.h: Deficiency in va_arg handling of
 array arguments.)
Date: Sat, 5 Nov 2011 16:21:50 +0000

 On Tue, Oct 04, 2011 at 02:10:06PM +0000, Wolfgang Solfrank wrote:
  >  > 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.
 
 Unfortunately, if they don't want it, we probably shouldn't diverge...
 
 -- 
 David A. Holland
 dholland%netbsd.org@localhost