X error

[Mustafa Mike Topcuoglu]

Hi,

Below is the end of a log output. Apparently it is looking for X.  
However I have no idea which X it is refering, and where to find it.

Thank you for any help/suggestion you can offer.


checking for pkg-config... /opt/local/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for X_CFLAGS...
checking for X_LIBS...
checking for X... no
configure: error: X is required, but it was either disabled or not  
found.
Warning: the following items did not execute (for xrender):  
org.macports.activate org.macports.configure org.macports.build  
org.macports.destroot org.macports.install