AIX testsuite failures

[Paolo Carlini]

Mark Mitchell wrote:

> I'm guessing that I'm being dumb about the way gthreads stuff works,
> and that HAVE_GTHR_DEFUALT is not the right test, and that, instead,
> the __GTHREADS grep test from acinclude.m4 is better:
>
>   if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
>     enable_thread=yes
>   else
>    enable_thread=no
>   fi
>
> We don't have access to $gthread_file in DejaGNU, so what's the right
> way to do this without depending on the build directory?  I propose
> that I have DejaGNU compile "#include <bits/gthr.h>" with "-E -dM" and
> grep for "__GTHREADS" in the resulting output.  I think that will
> correctly handle and command-line options that might change the
> threading model, etc.  David, can you confirm that doing that test
> will correctly report that threads are absent on AIX?
>
> If so, Paolo, is it OK to check in a patch that does as I suggest?

I came independently to the same conclusion (as other messages show). OK.

Paolo.