Running through a new Nagios 3.2.0 install.  Downloaded all the components I'm going to need on my new VPS.  Installed gcc, php, and a few others I knew I would need.  However when I ran the configure I got the following error:

*** GD, PNG, and/or JPEG libraries could not be located... *********

I forgot to add gd-devel to my install checklist.  That was an easy one.