[patch] Introduce vxworks7r2 support for ppc and ppc64

[Olivier Hainque]

Hi Segher!

> On 20 Oct 2020, at 22:06, Segher Boessenkool <segher@kernel.crashing.org> wrote:
> 
>> +	# Wind River 7 post SR0600 is mostly like Linux so we setup
>> +	# out config in a very similar fashion and adjust to a few
>> +	# specificities.
> 
> "our config"?
> 
>> +   - Starting with VxWorks 7 (post SR600), the system environment
>> +     was made extremely similar to GNU/Linux and this toolchain is
>> +     builtin on top of the corresponding header files.  */
> 
> "built on top"?

Indeed.

>> +/****************************
>> + * Common definitions first *
>> + ****************************/
> 
> We don't use such decorated comments in GCC.  But it is your header file
> of course :-)

Hmm, I’d really like to keep some visible separation for the
sections because it’s pretty dense overall and I think hard to
read without some high level hints about the general organization.

There are (a few, agreed :) instances of sectioning in other
sources, tree-core.h or tree-vectorizer.h for example, with a
different style though. I think I’ll adjust to one of these.

> I don't see anything wrong with the actual code itself, fwiw :-)

Great, feedback appreciated, thanks!

Next in line specific to rs6000 are a couple of suggestions
for updates in the testsuite (wrt fpic and dfp).

Regards,

Olivier