[CentOS] expat packages

Hi all,

One more time, I have a problem :)

I am trying to compile an application which needs expat. I have installed the "expat" and "expat-devel" packages with yum but when I try to compile my application, I have the following problem : expat_external.h is not found.

This file is nowhere on my PC. I asked other peoples and some Debian users tell me that this file is part of the libexpat1-dev package on their distribution. Well, I didn't find this package with yum on the CentOS repository.

Does it mean that it is not available ?

What can I do to solve this problem?

Thank you for your answers,

Jean LEE