[petsc-dev] Fwd: SACUDA - Cannot compile

[Barry Smith]

On Oct 28, 2010, at 4:15 AM, Aron Ahmadia wrote:

> I like Lisandro's approach.  If the developers can provide scripts
> that attempt to identify the usage of Vec and replace them with
> PetscVec, all the better.

   Unfortunately getting the #defines exactly right (including for Fortran) I think is a major bitch as is having a translator script that works perfect; and I hesitate to have something that "works most of the time".

   Barry

> 
> A
> 
> On Thu, Oct 28, 2010 at 11:13 AM, Lisandro Dalcin <dalcinl at gmail.com> wrote:
>> On 28 October 2010 06:45, Barry Smith <bsmith at mcs.anl.gov> wrote:
>>> 
>>> On Oct 27, 2010, at 10:39 PM, Matthew Knepley wrote:
>>> 
>>>> On Wed, Oct 27, 2010 at 10:34 PM, Sean Farley <sean at mcs.anl.gov> wrote:
>>>>   Matt had a major hissy fit when I proposed this (again) a couple of years ago.
>>>> 
>>>> What's wrong with a namespace? Isn't this what Matt is proposing the Thrust developers do?
>>>> 
>>>> "I reported it and they know about it. PETSc takes over VecType, and it would be much easier (maybe) for Thrust to just namespace that thing."
>>>> 
>>>> Everybody and their mother uses the names Mat, Vec, etc. why can't PETSc namespace them?
>>>> 
>>>> This is a matter of supporting existing users. Everyone that uses PETSc has Vec and Mat everywhere in
>>>> their code. If we change that, we will have to have an excellent, easy, and fullproof upgrade path or
>>>> everyone will hate us and may not even upgrade.
>>> 
>>>   Everyone already hates us, so I can live with that. Etags (or ctags with Vim) is the way to go, plus it will force everyone to finally learn tags. People upgrade because there is a reason in the new release to upgrade, if there is no reason to upgrade then why upgrade?
>>> 
>> 
>> What about properly namespace everything, and also provide a
>> compatibility header full of #define's , at least for the next couple
>> of mayor releases?
>> 
>> 
>> --
>> Lisandro Dalcin
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>>