crypt() is not supported : UNIX

[Anon]

Hello,

I built php 4.0.6 on Tru64 UNIX. Everything seems to be working as it should except for crypt. I get the following error when trying to call the crypt function:

crypt() is not supported in this PHP build

I find plenty of references to this issue in win32. What I find strange is that crypt should work out of the box on this OS. Anyone have an idea why it isn't?

Thanks
Travis