[Tinyos-devel] ti msp430 cc

[Razvan Musaloiu-E.]

Hi!

On Thu, 13 Nov 2008, David Gay wrote:

> On Thu, Nov 13, 2008 at 9:48 AM, Razvan Musaloiu-E. <razvanm at cs.jhu.edu> wrote:
>>> So, figure out the answers to those questions, and give it a try...
>>> And if you want to make any changes to nesC to address any of these
>>> I'm happy to incorporate patches, or even better have you maintain the
>>> other compiler's nesC support (to be frank, this was always the major
>>> issue with 8051 support)
>>
>> Let's say that my main target would be SDCC for 8051. What things should I
>> change in nesc to get a app.c that compiles correctly? :-)
>
> Support for SDCC's C extensions in nesC.

You are referring to the src/machine/sdcc* files?

> You would need to look those up to figure out more in detail how to
> handle them... Options essentially include:
>
> - avoiding the extensions
> - using the preprocessor to remap them to something nesC understands,
> then unremapping them as a post-pass (a variation avoids the first
> remap step, and just has you writing something nesC understands and
> mapping that to the extension after nesc1 runs)
> - extending nesC's C frontend-part to at least parse, preserve and
> unparse the extension (you get extra credit for checking that it's
> used correctly...)
> - in the last two cases, if you want the extension to work in modules
> (and generic modules) you need to make sure that renaming symbols
> doesn't cause problems with how you handled the extension...
> - anything involving #pragma is likely to be a pain... (not so much
> understanding it, but putting it somewhere rational in the C code
> generated by nesC)
>
> And, FWIW, the more hacky the handling, the less likely I am to
> include it in the nesC distribution itself (though that's also a
> function of how cleanly separated the hacks are - a hacky script is
> fine, some hacky changes to C type checking probably aren't)
>

One more question: are the internals of the nescc compiler explained 
somewhere? Even a sketch of how things are organized would be very 
helpful (to me at least :P).

--
Razvan ME