Got it compiled properly now, had to get one of the versions without the lexer/parser files included.

However I'm still getting 'xhp_a' class not found errors with the basic tests from the wiki, the same as the other comments in the sibling thread.

It seems to happen on several platforms so its probably a configuration error somewhere.

Any help would be appreciated.

EDIT: Figured it out. You need to include 'init.php' from 'php-lib' in your php scripts. I copied the directory from the xhp source to my site directory and included them from there.