[gmx-users] configure: error: cannot compute sizeof (off_t)

[Mark Abraham]

On 8/02/2011 12:58 AM, vferrario at units.it wrote:
> Dear all,
>
> I'm trying to install gromacs 4.5.3, I've succesfully installed fftw 
> 3.3.2 and openmpi 1.4.3
> When I try to configure gromacs with
>
> ./configure --with-fft=fftw3 --enable-shared --enable-mpi
>
> the shell reply me with this error:
>
> configure: error: cannot compute sizeof (off_t)
> See `config.log' for more details.
>
> what does it mean? Do you need a copy of config.log?

This kind of problem usually means that configure has failed to find a 
compiler that can produce an executable under the conditions you're 
using. You need a compiler available that can link to openmpi, and 
perhaps to tell configure about it (e.g. ./configure <blah> 
MPICC=mympicompiler)

Mark