Can't find gregoriantojd

[Mary Anderson <maryfran@xxxxxxxxxxxxxxxxxx>]

Hi all,
   My linux PHP 5.2.6 is missing some of the calendar functions, even 
though it was installed with enable-calendar.  We think they are in some 
library somewhere, but have not been able to find them.  Does anyone 
know how to install these functions correctly, or which library we might 
find gregoriantojd in?  This PHP has been newly installed -- my previous 
PHP installation had these functions.

   Thanks.
Mary Anderson