What do you mean by lightweight? Ruby certainly seems to be portable,
in that it can be implemented on Mac OS X, Windows, Linux, BSD, BeOS,
OS/2, Solaris, AIX, etc. Are you looking to implement Ruby on an
embedded device like a PDA, Smartphone, game console, etc.?

Chanon Sajjamanochai wrote:
> Hi all,
>
> I was the one who started the "Using Ruby in a commercial application?"
> thread.
> Thanks for all the replies!
>
> After some more consideration on using Ruby embedded in C++ for games, it
> started to become clear that the main reason that I wouldn't want to use it
> yet is because of portability and lightweightness.
>
> Lua which is more widely used in games is a lot more lightweight and
> portable.
>
> The main reason this is important to me is that porting games to different
> platforms might be a problem if the scripting language used isn't portable
> to other platforms.
>
> But I really like the Ruby language/syntax .. I just wish there was a more
> lightweight version of it that is more portable. Heavy features such as
> threads wouldn't be required so that it could be more lightweight.
>
> Anyways, I searched the archives and found a few people saying they were
> working on something like this. Also there is something called "minruby"
> which doesn't have any documentation.
>
> Anyone know of any information about a lightweight Ruby project or is
> working on one?
> 
> Thank you!,
> Chanon