I think you meant signed. It is signed in both configure.ac and 
ompi_datatype_module.c.

-Nathan

On Tue, Jul 16, 2013 at 10:48:12PM +0200, George Bosilca wrote:
> It's a typo, MPI_Aint is of course unsigned.
> 
>   George.
> 
> On Jul 16, 2013, at 22:37 , David Goodell (dgoodell) <dgood...@cisco.com> 
> wrote:
> 
> > On Jul 16, 2013, at 3:22 PM, George Bosilca <bosi...@icl.utk.edu> wrote:
> > 
> >> I read your code and it's definitively looking good. I have however few 
> >> minor issues with your patch.
> >> 
> >> 1. MPI_Aint is unsigned as it must represent the difference between two 
> >> memory arbitrary locations. In your MPI_Type_get_[true_]extent_x you go 
> >> through size_t possibly reducing it's extent. I would suggest you used 
> >> ssize_t instead.
> > 
> > MPI_Aint must be signed for Fortran compatibility (among other reasons).  
> > If OMPI's MPI_Aint is unsigned then that's a bug in OMPI.
> > 
> > -Dave
> > 
> > 
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> 
> 
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