newlib with avr-libc support

[Joel Sherrill]

Ralf Corsepius wrote:
> josh.switnicki@utoronto.ca wrote:
>   
>> Hello,
>>
>> I am working as a gsoc student on porting rtems to the atmega128.
>>
>> I am having some trouble adding the .h files from avr-libc to newlib.
>> the end result I would like is to have two directories in the newlib 
>> include path with the avr specific .h file in them so that when the 
>> files are included in the code they would be included in the same way as 
>> would be done with avr-libc
>> ie. #include <avr/interrupts.h>
>> this is my first time attempting something like this and all the help 
>> and patience is greatly appreciated.
>>     
>
> Generally speaking, you seem to be putting "the horse before the cart", 
> i.e. you seem to approaching the problem from the wrong end.
>
> In RTEMS, stuff like interrupts etc. belong into RTEMS, not into newlib.
>
>   
Ralf, the .h files he is merging include all the CPU model
ifdef's and IO register names and bit definitions.  avr-libc
provides them and you need them to write device drivers,
bring their setjmp/longjmp over and to write the RTEMS
context switch and interrupt vectoring code.  It is easier
to just take them in their entirety than pick them off one
at a time.

The problem he is having is that we need machine/avr/include/XXX
to get picked up and installed where XXX is a non-standard
directory.  sys/linux does this but it looks like the method has
changed since I last looked at it.

--joel
> Ralf
>
>
>