smpi build without F2C was broken since 58ea5966
(cherry picked from commit 18bbe5b38ef4565c39f452b42a5b5417c5ad61ed)
Export DVFS functionality for smpi (experimental).
(cherry picked from commit 444b3487fdce26571d25a82b1fb835c8c15e550f)
Add example for smpi+dvfs.
(cherry picked from commit 40f9c3e861f4b651dc2dd63b79271e735931a1a7)
Add Fortran bindigns for smpi+dvfs.
(cherry picked from commit 12a61a8ab437baed346e356f63e02cdaeabeb6f4)
Add Fortran examples for smpi+dvfs.
(cherry picked from commit 28ec59bf4a9e4b04c1af121616b72bd846772fa5)
Fix 32 bits builds.

f2c defines integer as long int on 32 bits systems.
(cherry picked from commit 612d201268a4154815e62436f30da3e6323486ee)
Increase junkarea to 4kiB.
(cherry picked from commit 49b058066db4e2b4e78b9f7924dd3795a024d94a)