Hi Brandt, I am on linux and see the same problem. It is solved (at least here) if you add at the end the library libgomp, i.e: f2py -c -m play play.f90 --fcompiler=gfortran --f90flags="-fopenmp" -lgomp Hope it helps, Juan

Hello, I'm struggling to create openmp subroutines. I've simplified the problem down to the subroutine below.

-- play.f90 -- subroutine step(soln,n) implicit none integer n,i real*8 soln(n)

!f2py intent(in) n !f2py intent(out) soln !f2py depend(n) soln

!$OMP PARALLEL DO do i=1,n soln(i) = .1 end do !$OMP END PARALLEL DO end subroutine step

I compile this with the command:

f2py -c -m play play.f90 --fcompiler=gfortran --f90flags="-fopenmp"

This completes successfully. When I import the module, I get the following error message.

$ python -c 'import play' Traceback (most recent call last): File "<string>", line 1, in <module> ImportError: dlopen(./play.so, 2): Symbol not found: _GOMP_parallel_end Referenced from: /home/bbelson/Desktop/SOR/play.so Expected in: flat namespace in /home/bbelson/Desktop/SOR/play.so

It seems to me that the linking step is broken, however I did not see any other options in the f2py documentation to change the linking step. Did I miss something?

Thanks, Brandt