CODEWITHSUNDEEP
pythoncythonsetuptoolspython-wheel
Martin Thoma
Martin Thoma

Reputation: 136379

Can I create wheel distributions of packages containing cython for other platforms?

When I create a wheel distribution with python setup.py bdist_wheel of a package which contains cython code, then the platform tag fits to my current platform. Projects like numpy / scipy have a lot of different wheels online and I guess they use CI / CD platforms like Travis / Azure Piplelines for that. However, I wondered: Can I create wheel distributions of packages containing cython for other platforms than my own, using only my computer?

MVCE

fib.pyx

def fib_iterative_cython(int n):
        cdef long long a = 0
        cdef long long b = 1
        for i in range(n - 1):
            a, b = b, a + b
        return b

setup.py

from setuptools import setup
from Cython.Build import cythonize

setup(
    ext_modules = cythonize("fib.pyx")
)

Upvotes: 3

Views: 540

Answers (1)

phd
phd

Reputation: 94502

Short answer: no.

Longer answer: you can distribute sdist (source distribution). This forces the users to compile the sources so they have to install developer tools. pip install mostly handles compilation except Cython: you need to teach your users to install Cython first.

Detailed answer: no. Partially it's Python fault, but mostly not. There are problems at many levels. First, cross-compilers are problematic and cross-linkers even more so. Second, setuptools doesn't know any cross-compiler.

Solution: the only way to build C-modules is to build them natively in virtual machines or Docker containers.

Upvotes: 2

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