.c file created, but WinError 2 during compiling

[Wilco Hermens]

Hello,

I am entirely new to Cython and C++. When I try to compile the standard prime number generator example with a setup.py file, the cythonPrimes.c file is created, but get the WinError 2 saying that the file could not be found. This is the output:

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C:\Users\user\Documents\GitHub\cythonTest>python setup.py build_ext --inplace
running build_ext
building 'cythonPrimes' extension
error: [WinError 2] Het systeem kan het opgegeven bestand niet vinden

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It looks to me that there is some problem with the compiler. I have installed Visual Studio Build Tools 2022, which looks like it works fine:

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C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools>cl
Microsoft (R) C/C++ Optimizing Compiler Version 19.37.32825 for x86
Copyright (C) Microsoft Corporation.  All rights reserved.

usage: cl [ option... ] filename... [ /link linkoption... ]

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This is the setup.py file:

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from setuptools import setup

from Cython.Build import cythonize

setup(

    ext_modules = cythonize("cythonPrimes.pyx", language_level="3"),

)

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And cythonPrimes.pyx:

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def primes(int amount):

    cdef int current_number = 2

    cdef int primes_found = 0

    cdef int[100000] primes

    if amount>100000:

        amount = 100000

    while primes_found < amount:

        for prime in primes[:primes_found]:

            if current_number % prime == 0:

                break

        else:

            primes[primes_found] = current_number

            primes_found += 1

        current_number += 1

    primes_as_python_list = [prime for prime in primes[:primes_found]]

    return(primes_as_python_list)

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I've also created the pyproject.toml file as the cython docs mentioned:

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[build-system]
requires = ["setuptools", "wheel", "Cython"]

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Is there something in the code or do I have to setup the compiler (I've just downloaded and installed it) to make this work?