libxml2 is the XML C parser and toolkit developed for the Gnome project from http://www.xmlsoft.org/
Configure line non debug:
cscript configure.js lib="<path to iconv lib dir>" include="<path to iconv header dir>" vcmanifest=yes
Configure line with debug:
cscript configure.js lib="<path to iconv lib dir>" include="<path to iconv header dir>" debug=yes mem_debug=yes vcmanifest=yes
libxml2_a_dll.lib MUST be used with PHP.