php mcrypt shared configuration option
 

I have a php rpm on my system that was installed with many options one of them being:
'--with-mcrypt=shared'

However when I try and use mcrypt_encrypt() I get an undefined function error.

I have installed libmcrypt to /usr/local/lib
I have added /usr/local/lib to /etc/ld.so.conf and run ldconfig
then restarted httpd

I still get the undefined function error.

What is meant by --with-mcrypt=shared ?

Where can I put a link to the libmcrypt.so so that php will find it?

any ideas?