> On 16 Dec 2016, at 19:16, Jeff Squyres (jsquyres) <jsquy...@cisco.com> wrote:
> 
> On Dec 16, 2016, at 12:48 PM, 🐋 Jan Hegewald <jan.hegew...@awi.de> wrote:
>> 
>> Your example works fine here too.
>> I call Wtime from Fortran code. But if I do the same as in your C example 
>> 1), it seems to work as well.
>> I am puzzled as to what is causing this. On several HPC clusters everything 
>> is fine. Only on my Mac I see the 0.0. As this is the only time I use 
>> openmpi, I thought it would be the cause. Strange. I will keep you informed.
> 
> What compiler are you using?

GNU Fortran (GCC) 6.1.0

FYI: with the minimal example I get now:

➜  mpirun -n 1 ./a.out
   1481912651.3053751        1481912652.3056040     


Cheers,
Jan
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