By default, LDT ships with a built-in Lua VM (based on jnLua) so as anyone without even having to install Lua on its machine can start running Lua scripts real quick. I think that the way you've set the PATH and CPATH, the jnLua VM itself is not found anymore.
What you probably want is to configure a "local interpreter" for your local native VM. You can use  as a reference. Once you have the interpreter set up, you can launch the script against this interpreter instead of the embedded jnLua one by tweaking your launch configuration.
Hope this helps,
De : Barry Camel <firstname.lastname@example.org>
R�ndre �bsp;: Lua mailing list <email@example.com>
Date : samedi 7 septembre 2013 13:19
�nbsp;: "firstname.lastname@example.org" <email@example.com>
Objet : Getting started with lua in eclipse (LDT)