Lahey/GNU Fortran

-[n]openmp

Enable the OpenMP extensions

Compile and link. Default: -nopenmp

GFortran option: -fopenmp

Specify -openmp to enable OpenMP extensions.This includes OpenMP !$omp directives in free form and c$omp, *$omp and !$omp directives in fixed form, !$ conditional compilation sentinels in free form and c$, *$ and !$ sentinels in fixed form, and when linking arranges for the OpenMP runtime library to be linked in.