[MPI3 Fortran] Argument data sizes

[Aleksandar Donev]

On Thursday 18 September 2008 13:42, Craig Rasmussen wrote:

> 4. Use default integer, write the wrapper in Fortran, and use  
> assignment to cast the integer to C_INT.
I vote for this, but please delete everything after the first comma. Your 
OpenMPI implementation can do that under the covers---we are talking about a 
standard here and all it says is "default integer" (deal with it somehow 
please).

> I vote #1 as it provides the most flexibility to the implementer and  
> the compiler will give an error if the programmer does something stupid.
Not really. Fortran does not have stronly-typed type-aliases. So if 
MPI_SIZE_KIND happens to be equal to default integer, a code will work. It 
will break with -i8. It does force a careful programmer to write the kind 
explicitly, but bad programmers and existing codes will still be just 
as "stupid".

Best,
Aleks