[xml] Where do I find libxml2-dev source code?

["Dr. David Kirkby" <david kirkby onetel net>]

Hi,
I'm trying to build the 'chessd' Internet chess server

http://chessd.sourceforge.net/index-en.php

on a Sun Ultra 60 with Solaris 10. The INSTALL files lists the following 
requirements.

    pkgconfig
    postgres
    postgres-dev
    libpq-dev
    libxml2-dev
    libltdl3-dev
    libtool
    make (GNU version)

But I can't seem to find libxml2-dev. I found the files

libxml2-2.6.26.tar.gz

libxml-docs.tar.gz  (is this relevant - note no number 2)

but all the -devel versions I can find are rpms for 386 CPUs. Where 
might I find a .tar.gz file? (It is possible I could make use of a src 
rpm, but it will mean I will need to build something to handle RPM 
files, as they are not typically used on Solaris).

--
Dr. David Kirkby