[rfc, stage 1] default to -fno-delete-null-pointer-checks on nios2-elf

[Jeff Law]

On 05/01/2015 02:33 PM, Sandra Loosemore wrote:
> Re https://gcc.gnu.org/ml/gcc-patches/2015-03/msg01510.html :
>
> On 04/15/2015 10:42 PM, Jeff Law wrote:
>> It looks very sane to me.  This is probably how the AVR and CR16 should
>> have been handled to begin with IMHO.
>>
>> FWIW, I generally discourage ports overriding default options, but this
>> is a case where I believe it makes some sense.
>>
>> Please move forward with an official submission.
>
> I've now bootstrapped and regression-tested the previously posted patch
> on x86_64-linux-gnu, as well as retesting it on nios2-elf after updating
> my source tree to current mainline head.
>
> Are the target-independent parts OK to commit?
Yes.  Please install.

Thanks,
Jeff