[petsc-dev] Fwd: SACUDA - Cannot compile

[Matthew Knepley]

On Wed, Oct 27, 2010 at 4:22 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:

>
>   Sending this to petsc-dev for better brains then mine to look at.
>

Yes, this is what bombs on the new version of Thrust. 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.

   Matt


>    Barry
>
>
> Begin forwarded message:
>
> *From: *Victor Minden <victorminden at gmail.com>
> *Date: *October 27, 2010 3:30:29 PM CDT
> *To: *Barry Smith <bsmith at mcs.anl.gov>
> *Subject: **Re: SACUDA - Cannot compile*
>
> Quick append: I realized that it would make the most sense to see if it
> compiles at all with just smoothed_aggregation.h included, and it does.
>  This caused me to look further and see that the first line that kills the
> compiler and the next few ones I looked at were trying to define and then
> use a struct (inside many nested namespaces) called VecType, which rang a
> bell--since vectype is a flag for petsc, I assume we have a
> variable/struct/something somewhere that is causing the compiler to not let
> us use it again--though it should be valid since it's in a namespace.  Is
> this mangling/namespace collision/something of the sort?  What's the best
> way around it?
>
>
> ---
> Victor L. Minden
>
> Tufts University
> School of Engineering
> Class of 2012
>
>
> On Wed, Oct 27, 2010 at 4:21 PM, Victor Minden <victorminden at gmail.com>wrote:
>
>> I'm having trouble compiling with the new experimental versions of thrust
>> and cusp, but only the sacuda preconditioner is affected.  I pulled them out
>> of their respective hg repositories and edited the version numbers so petsc
>> would take them, and all the aijcuda and veccuda stuff seems to compile
>> fine.  However, when the compile gets to sacuda.cu, I get a whole bunch
>> of
>>
>> /usr/local/cuda/bin/../include/thrust/detail/device/cuda/detail/b40c/vector_types.h(37):
>> error: expected an identifier
>>
>> and similar errors in two different files (make.log attached).
>>
>> I pulled everything out of sacuda.cu except for the include statements
>> (end of email[1]), but it still says the same thing.  Looking around online,
>> I guess this could be a C/C++ problem, maybe needing some extern magic or
>> something?  The internet is not being very helpful.
>>
>> The files that are affecting things were both added to Thrust *after* the
>> last time we've looked at sacuda, vector_types.h [2] and
>> radixsort_scanscatter_kernel.h [3].  These appear to be both part of a
>> bundled radixsort code from an external source.  The files are protected at
>> the top by a #pragma once, but I think we're ignoring pragmas (? or at least
>> we have the flag -Wnounknownpragmas) so I tried popping in an if !defined
>> and such to no avail.
>>
>> Does anything come to mind as a likely source of this problem?
>>
>> -Victor
>>
>>
>>
>>
>> [1]
>> #define PETSCKSP_DLL
>>
>> /*  --------------------------------------------------------------------
>> */
>>
>> /*
>>    Include files needed for the CUDA Smoothed Aggregation preconditioner:
>>      pcimpl.h - private include file intended for use by all
>> preconditioners
>> */
>>
>> #include "private/pcimpl.h"   /*I "petscpc.h" I*/
>> #include "../src/mat/impls/aij/seq/aij.h"
>> #include <cusp/precond/smoothed_aggregation.h>
>> #include "../src/vec/vec/impls/dvecimpl.h"
>> #include "../src/mat/impls/aij/seq/seqcuda/cudamatimpl.h"
>>
>>
>> [2]
>>
>> http://code.google.com/p/thrust/source/browse/thrust/detail/device/cuda/detail/b40c/vector_types.h
>>
>> [3]
>>
>> http://code.google.com/p/thrust/source/browse/thrust/detail/device/cuda/detail/b40c/radixsort_scanscatter_kernel.h
>> ---
>> Victor L. Minden
>>
>> Tufts University
>> School of Engineering
>> Class of 2012
>>
>
>
>


-- 
What most experimenters take for granted before they begin their experiments
is infinitely more interesting than any results to which their experiments
lead.
-- Norbert Wiener
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