[patch, libstdc++, testsuite] Modify tests to use tmpnam()

[Steve Ellcey]

On Wed, 2010-03-03 at 14:57 -0800, Janis Johnson wrote:

> I had forgotten that GNU ld warns about use of tmpnam:
> 
>    warning: the use of `tmpnam' is dangerous, better use `mkstemp'
> 
> It would be messy for the tests to turn off that warning since GNU ld
> isn't the only linker used with GCC.  Other tests that use tmpnam are
> compile-only and do not link.
> 
> Janis

Is this warning triggered by some flag?  I ran the tests on Linux
systems as well as HP-UX ones and I didn't get any failures.  I also
don't see warnings in my log file.  The linux tests were done with the
ToT GNU linker.

Steve Ellcey
sje@cup.hp.com