Hi

I've just got my hands on the latest Mastering Regular Expressions.   
I want to play with some of the clever stuff (eg lookbehinds) in  
ruby.  I'm running OS X on my desktop, and my ruby is compiled from  
MacPorts.  There's an oniguruma port, but does anyone know how to  
recompile ruby to use it?  Is there a command line switch I can pass  
to the port command?

Thanks
Ashley