[PATCH] pthread patch - Thomas Pfaff, please note

[Thomas Pfaff]

Christopher Faylor wrote:
> Thomas, I made the change below to stop a SEGV on thread exit as evinced
> by the threadidafterfork test in the testsuite.
> 
> The problem is that this code overwrites impure_ptr with the contents of
> the thread which called fork, which is not the correct thing to do since
> _impure_ptr contains global information not present in the calling threads
> reent structure.
> 
> I hope it makes sense.  If there is some better way to do this, please
> feel free to check it in.  This looked right to me, though.

It is ok for me.

I was not sure whether the thread local reent contains something 
important that should be restored after a fork, but with the 
_GLOBAL_REENT patches to newlib it is better to keep _impure_ptr unchanged.

Thomas