问题
I'm currently experiencing an issue in wrapping some Fortran subroutines for use in a python3 script. This issue has only come up since I have attempted to use OpenMP in the subroutines.
For example, if I compile a module 'test.pyd' using f2py -c -m --fcompiler=gfortran --compiler=mingw32 --f90flags='-fopenmp' test test.f90 -lgomp, in which 'test.f90' is a Fortran subroutine which contains a parallelized loop, upon attempting to import this module into my script, I encounter ImportError: DLL load failed: A dynamic link library (DLL) initialization routine failed..
Removing the -fopenmp flag in compiling, or the !$omp comments in the Fortran subroutine remove this error.
Changing the subroutine to a roughly equivalent Fortran program, the program compiles to a .exe and runs correctly in parallel.
I'm on a Windows 10 platform, with an AMD64 processor, using GNU Fortran and C compilers from TDM-GCC
回答1:
I just tried your build command, and it looks prefectly fine. I am myself able to run a parallel subroutine from a python module compiled just the way you are doing.
How are you executing the python code that is using your module? I think the problem is that you don't have the openmp dll (which is named libgomp-1.dll) in your path
I would advise you to run (from a bash shell) :
where libgomp-1.dll
If the command can't find it, then you should probably add the path to your openmp dll (which is usually "C:\tools\mingw64\bin\") to your PATH.
In order to do this, you can use:
export PATH=$PATH:C:\tools\mingw64\bin\ && python script_using_module.py
There is a good chance the way you are executing your python code doesn't account properly for the path, since you can run the parallel executable without a problem.
来源：https://stackoverflow.com/questions/44957887/python-import-error-for-f2py-modules-compiled-with-openmp