I'm trying to use CMake to build a fortran extension following this SO post in a setup.py.
When I run pip install . -v, I can see that my extension builds just fine, but then the binary (the .so file) is not installed alongside the python scripts which will try to import it. How can I guarantee that my extension is installed?
Here is my setup.py for reference
import os
import pathlib
from setuptools import setup, Extension
from setuptools.command.build_ext import build_ext as build_ext_orig
class CMakeExtension(Extension):
def __init__(self, name):
# don't invoke the original build_ext for this special extension
super().__init__(name, sources=[])
class build_ext(build_ext_orig):
def run(self):
for ext in self.extensions:
self.build_cmake(ext)
super().run()
def build_cmake(self, ext):
cwd = pathlib.Path().absolute()
# these dirs will be created in build_py, so if you don't have
# any python sources to bundle, the dirs will be missing
build_temp = pathlib.Path(self.build_temp)
build_temp.mkdir(parents=True, exist_ok=True)
extdir = pathlib.Path(self.get_ext_fullpath(ext.name))
extdir.mkdir(parents=True, exist_ok=True)
# example of cmake args
config = 'Debug' if self.debug else 'Release'
cmake_args = [
'-DCMAKE_LIBRARY_OUTPUT_DIRECTORY='+str(extdir.parent.absolute()),
'-DCMAKE_BUILD_TYPE=' + config,
'-DBUILD_PYTHON_MODULE=ON',
'-DBUILD_FORTRAN_LIBRARY=OFf',
'-DBUILD_THE_EXAMPLES=OFF',
]
# example of build args
build_args = [
'--config', config,
]
os.chdir(str(build_temp))
self.spawn(['cmake', str(cwd)] + cmake_args)
if not self.dry_run:
self.spawn(['cmake', '--build', '.'] + build_args)
# Troubleshooting: if fail on line above then delete all possible
# temporary CMake files including "CMakeCache.txt" in top level dir.
os.chdir(str(cwd))
setup(name = 'mypythonlibrary',
packages=['mypythonlibrary'],
version='0.1',
ext_modules=[CMakeExtension('mypythonlibrary/myfortranlibrary')],
cmdclass={'build_ext': build_ext,})
