Hi Jerônimo,

> Ok, I'll try the easiest first. But even to do that I'm a little lost,
> can I just add the "foo.c" file at "plugins" folder and compile? Do I
> need to add it to the "Makefile.am"?
> 

Yes, you need to add it to Makefile.am at least.

> Is there a easy way to test it with Eclipse? By test, I mean configure
> Eclipse to cross-compile it, launch and debug at the target, this case
> the Beaglebone Black board.
> 

Can't help you there, don't use IDEs.

Regards,
-Denis