[OpenAFS] Re: AFS Perl module and threaded Perl

[Russ Allbery]

Norbert Gruener <nog@MPA-Garching.MPG.DE> writes:

> Here is my description which I had sent to some users of my module.

> ------------------------ problem description -------------------------
> And this is the outcome.  Perl in the "thread" version is linked
> against the "libpthread" system library.  Therefore it gets the
> "thread" version of the system calls (in our case "longjmp").  Whereas
> OpenAFS is using its "own threading" package (called LWP).  And these
> two things are not compatible.

I don't understand... LWP doesn't provide its own version of longjmp, so
far as I can tell.  It just calls the system version.

> I could prove that by linking the OpenAFS "vos" binary against the
> "libpthread".  Then the "vos" binary crashed exactly on the same
> statement as the Perl AFS module.

Is it perhaps doing something that breaks some assumption made by the
pthread version of the libraries?

> The final conclusion of this case is that "as long as OpenAFS is using
> its own threading, it is not possible to use Perl with 'threading'".
> ------------------------ problem description -------------------------

Even if this is the case, this shouldn't be an impediment to getting the
AFS Perl module working, should it?  After all, none of the *client* code
does any threading at all.  Can't it just be built with the same libraries
that Perl is built with?

-- 
Russ Allbery (rra@stanford.edu)             <http://www.eyrie.org/~eagle/>