Hi,

The base.bbclass file that is included with the bitbake sources does not 
appear to work properly. Specifically, none of the output appears on screen.

A quick look at the poky equivalent shows that they use a different 
means to print the data. Presumably something got updated somewhere, and 
the example base class is merely out of date.

The attached patch fixes the do_listtasks and do_showdata code such that 
it works as I would expect.

I had expected that the base_do_build function would run if my .bb file 
did not define do_build, but it does not appear to, and it's not obvious 
to me how, when, or why it is supposed to work.

Andrew