On Jan 19, 2014, at 6:11 PM, Jed Brown <[email protected]> wrote:
> Barry Smith <[email protected]> writes:
>
>> Nope because in my previous assignment I asked Satish to check for
>> -O stuff in compiler wrappers as well as CFLAGS.
>
> So if a user builds with MPICH, they'll get different optimization
> options than building with Open MPI, simply because MPICH includes -O2
> in the wrapper?
Yes.*
And BTW, you do know my opinion of compiler wrappers!
Barry
* But note that we have not yet discussed the case where PETSc compilers the
MPI implementation and what optimization flags we pass down there.
>
>>> and some compilers have funny names for
>>> optimization flags.
>>
>> This is a small possibility because normally there is a -Od as well
>> as the funny named other stuff. If we come upon another funny name
>> that replaces -Od we can incorporate that as well.
>
> I'm just not wild about being in the business of classifying which
> options are related to optimization.
