[bug-libmatheval] LGPL license possible?

[Ted Zlatanov]

Is there any chance libmatheval can be put under the LGPL?

I would like to use it in a GPL project (CFEngine 3: http://cfengine.com) which has optional non-free extensions for paying customers, but is GPL'd otherwise.  The community version of CFEngine 3 is not crippleware--it is fully functional and has a large user base.  But it can't use libmatheval 

Thanks

Ted