configure: error: Can't find expat library. Please install expat.

[Claessens]

Configure stops at the following:

checking for XML_ParserCreate in -lexpat... no
configure: error: Can't find expat library. Please install expat.

expat is installed version: Expat, Release 2.0.1

Tried a reboot

Still no joy.

I am not a command line junkie. I am installing this because I need to  
install PCSC Lite which requires HAL.