H5Part development and discussion

[PSI <achim.gsell AT psi.ch>]

> On 25 Jul 2017, at 18:47, Matthew Bettencourt <mbetten AT sandia.gov> wrote:
> 
> It is the second case.  It might work depending on your mpi.
> 
> 
> The problem is if my main program says
> 
> include <mpi.h>
> 
> include <H5hut.h>
> 
> you will have issues w/
> 
> 
> MPI_Comm being redefined from  a struct to an int.
> 
> Swapping the order of the includes also causes a problem.
> 

OK, got it. I'm working on a solution.

Best

Achim


> 
> On 07/25/2017 10:37 AM, PSI wrote:
>>> On 24 Jul 2017, at 19:45, Matthew Bettencourt <mbetten AT sandia.gov> wrote:
>>> 
>>> I really like H5Hut and I'm using the latest git verison.
>>> 
>>> 
>>> Question, it looks like the parallel_io define is really has_mpi which is 
>>> necessary for parallel_io but not sufficient.  If you are building with 
>>> MPI but not a parallel hdf5, then you get errors at link time if you 
>>> enable parallel_io or at compile time if you use mpicc.
>> I'm not sure whether I understand you correctly. Is this what you mean?
>> 
>> First case: building H5hut with MPI, a serial (not parallel) hdf5, 
>> PARALLEL_IO defined.
>> This combination is not valid. I will add some checks in configure and 
>> H5huts's header files to print an error.
>> 
>> Second case: building H5hut with MPI, a serial hdf5, PARALLEL_IO not 
>> defined.
>> This should work, I have to test this case.
>> 
>> 
>> Best
>> 
>> Achim
>