For a computation demonstration project in Linux and Python env, I need to call a C multiplication routine "matmult.c" but before I want to perform an important test if I could do another ctypes import from Windows. I have built a shared library named libdivide.so with MinGW (not MinGW-w64) and followed this post but without doing any configuration to indicate a compiler path to MinGW. C:\base39\frede\Cpython_win32\setup.py I really want to get some infos or some sites (I just read the ctypes official doc) to read to go further because my first question is: has anyone already tried this? building firstly the shared lib and then run python setup.py build_ext. In the meanwhile I will advance on Linux except if I have a return post. My OS is Windows 10 64 bits. Edit: I have installed MinGW on the root C:\ but the only time when I have tried to load a shared library from this compiler but outside msys.exe it was on another PC with Matlab R14(an eternity) and it had failed. Now I know that I would better try MinGW-w64 for R2021b but I could get the same error (below). My second question would be: do I need some extra knowledge about dll for getting this? from distutils.core import setup, Extension setup(name='divide', version='1.0', description='Python extension package for demo', ext_modules=[Extension('divide', ['dividefunc.c'],include_dirs=['include'])], packages=[''], # fred yhe package is assumed to be at the root package_dir={'': 'lib'}, #package_data = unused here ) import ctypes lib = ctypes.cdll.LoadLibrary('divide.so') #not sure def divide_modulo(a,b): div=ctypes.c_int(0) rest=ctypes.c_int(0) lib.divide_int(a,b, ctypes.byref(div), c_types.byref(rest)) return (div.value, rest.value) #class DynamicArray(ctypes.Structure): # _fields_ = [("n", ctypes.c_int), ("r", ctypes.POINTER(c_types.c_int))] ./include/dividefunc.h ./lib/libdivide.so ./source/ ./setup.py ./dividepy.py Many thanks (base39) C:\base39\frede\Cpython_win32>python setup.py build_ext running build_ext building 'divide' extension error: Unable to find vcvarsall.bat Continue reading...
