PL/1 frontend

[Andi Hellmund]

Hey Tom,

> You need to define a lang_tree_node type, even if its empty.  See
> the lto frontend example.
You could also look at this site 
(http://code.redbrain.co.uk/cgit.cgi/gcc-dev/tree/gcc/gcalc?h=documentation). 
It contains the front-end code for a very simple front-end showing the 
general/expected structure of the front-end. The code isn't yet optimal, 
but it should help you to figure out what you really need to build-up 
the front-end.

If you have any specific questions about front-ends and how to pass data 
to the middle-end feel free to ask on this list :-)

Hope that helps,
Andi