Re: gcc.dg/compat/struct-layout-1.exp does not supported installed-compilertesting

[Mark Mitchell <mark at codesourcery dot com>]

DJ Delorie wrote:
> > (There's still a POSIX-ism in the generator, in that it tries to
> > write to "/dev/null".  On Windows systems, I bet this will often
> > work, but create a real file with that name.  It would be better,
> > and avoid portability problems, to guard the calls to fwrite, etc.,
> > with "if (file)" rather than spew to "/dev/null", but that's for
> > another day.)
>
>
> Both Cygwin and DJGPP know about /dev/null just fine.  I don't know
> about MinGW though.

It doesn't.  MinGW is just MSVCRT.

> But it's a lot faster if you don't do the write at all ;-)

Yes; that's why I said "better" in addition to "avoid portability 
problems". :-)

I kinda think any program opening /dev/null itself is slightly confused; 
/dev/null is a convenience for users to use with programs that insist on 
writing to a file, not for programs that might or might not themselves 
want to write to things.  Of course, this particular program is not 
performance-critical, so it's not like anyone has, or should have, tried 
hard to make it go maximally fast. :-)

--
Mark Mitchell
CodeSourcery, LLC
mark@codesourcery.com
(916) 791-8304