=head2 Building with threads
-For Irix 6.2, you have to have the following patches installed:
+Run Configure with -Duseithreads which will configure Perl with
+the new Perl 5.8.0 "interpreter threads", see L<threads>.
+
+The old Perl 5.005 threads is obsolete, unmaintained, and its use is
+discouraged. If you really want it, run Configure with the
+-Dusethreads -Duse5005threads options as described in INSTALL.
+
+For either thread model and for Irix 6.2, you have to have the
+following patches installed:
1404 Irix 6.2 Posix 1003.1b man pages
1645 Irix 6.2 & 6.3 POSIX header file updates
your machine to panic and crash when running threaded perl. Irix 6.3
and later are okay.
+ Thanks to Hannu Napari <Hannu.Napari@hut.fi> for the IRIX
+ pthreads patches information.
+
=head1 AUTHOR
Jarkko Hietaniemi <jhi@iki.fi>