Where are these guys, e.g. pthread_create?

It looks like they were installed with glibc-2.3.6-i486-6 on Slack 11,
but in Slack 12 and -current they're not there. (There's a /usr/man dir
in the glibc package, but with nothing in it.)

I have /usr/man/man7/pthreads.7.gz from the man pages package, but grep
pthread_create in /var/adm/packages (or MANIFEST.bz2, for that matter)
gives no matches, nor does sudo locate pthread_create.

Interestingly, apropos gives me hits, but man doesn't. (Maybe
makewhatis gets the info from pthreads.7? Or maybe the file exists
somewhere and I can't find it?)

$ apropos pthread_create
pthread_create (3) - create a new thread
$ man pthread_create
No manual entry for pthread_create

The POSIX man pages from LDP include the pthread pages, but Patrick's
SlackBuild script strips them out when building the man pages package.
They probably weren't what I was after, anyway.

Thanks,
-Beej