[CentOS] installation needs libpng but rpm is there

From: Kai Schaetzl <maillists at conactive.com>
> Ann kok wrote on Wed, 11 Feb 2009 05:15:33 -0800 (PST):
> > configure: error: png library not found. please install libpng
> This signals that you are not using an rpm. Get an rpm version of what you 
> want to install.

Or just install libpng-devel as suggested...

JD