configure refuses to recognize pthreads

["Daryl L. Biberdorf" <darylb@mail.ctsfw.edu>]

I just downloaded the new 1.1 release of OpenLDAP.
I extracted it with "zcat openldap-release.tgz |
tar xvp".

After fixing the permission problems on configure and
a few others, I did a ./configure.
Even though autoconf finds pthreads.h, it
fails to recognize the version I have and
ends with that error.

I'm running Caldera 1.2, kernel upgraded to 2.0.35,
with pthreads 5.4.38 (I tried 5.4.46, from Caldera 1.3,
to no avail).

What's wrong?

Thanks.

Daryl