New source layout.

[Amar Takhar]

On 2015-03-12 09:45 -0400, Gedare Bloom wrote:
> This doesn't work in supposedly CPU-independent source code files.
> 
> Let's take percpu.h as an example. We need to include it in
> <rtems/score/thread.h> -- the main header for thread scheduling that
> is included by virtually every source file in the supercore. We can't
> include the CPU-dependent headers here, unless we use the CPP #if-elif
> cascase as mentioned by Sebastian.

The eventual goal is everything would be distilled to a single header per arch 
that would have to be included in your application source.  Right now that is 
not possible and we do use the if-elif solution right now in the waf build as a 
stopgap.

I've asked Chris to better explain this he understands the issues from an RTEMS 
perspective better than I do.  He also knows what the eventual goal of the 
header move is.

To be clear: the intermediary period is already solved in the waf build nothing 
will have to change.  As we change / 'unwind' the headers we'll modify the 
source.  This is going to be a drawn out process.  The nice thing is any changes 
we make in this regard is verifiable by using hashes of the resulting objects.


Amar.