[boehm-gc] Use thr_stksegment to determine Solaris stack base

[Bryce McKinlay]

On Wed, Mar 6, 2013 at 11:31 AM, Rainer Orth
<ro@cebitec.uni-bielefeld.de> wrote:

> This patch fixes the failures by backporting the use of thr_stksegment
> from gc 7.2c.
>
> Bootstrapped without regressions on i386-pc-solaris2.{9,10,11} and
> sparc-sun-solaris2.{9,10,11}, fixes the i386-pc-solaris2.11 failures.
>
> Ok for mainline?

Yes, thanks. Though of course, we really ought to update the entire GC tree!

Bryce