File setup.py of Package failed_python-editdistance

from __future__ import annotations
import os
import platform
from setuptools import setup, Extension, find_packages

# Basic metadata (kept simple and consistent with the upstream package)
NAME = "editdistance"
VERSION = "0.6.0"
DESCRIPTION = "Fast edit distance (Levenshtein) library for Python"

# Detect architecture. On some exotic architectures (e.g. riscv64) the
# Python internal header 'longintrepr.h' may not be available on the
# system include path, causing the compiled extension build to fail.
# To maximize portability in those environments we skip building the
# C/C++ extension and install the pure-Python fallback.
_machine = platform.machine().lower() if platform.machine() else ""
_skip_ext_on_arch = _machine.startswith("riscv") or _machine.startswith("risc-v")

if _skip_ext_on_arch:
    # Do not attempt to build C/C++ extension on architectures where it
    # frequently fails due to missing internal Python headers.
    ext_modules = []
else:
    # Normal extension build for supported architectures
    ext_modules = [
        Extension(
            "editdistance.bycython",
            sources=[
                "editdistance/bycython.cpp",
                "editdistance/_editdistance.cpp"
            ],
            include_dirs=["./editdistance"],
            language="c++",
        )
    ]

# Read long description if available
long_description = ""
if os.path.exists("README.md"):
    try:
        with open("README.md", "r", encoding="utf-8") as fh:
            long_description = fh.read()
    except Exception:
        long_description = ""

setup(
    name=NAME,
    version=VERSION,
    description=DESCRIPTION,
    long_description=long_description,
    long_description_content_type="text/markdown",
    packages=find_packages(exclude=("tests",)),
    include_package_data=True,
    zip_safe=False,
    ext_modules=ext_modules,
    # Minimal classifiers to be harmless
    classifiers=[
        "Programming Language :: Python :: 3",
        "License :: OSI Approved :: MIT License",
    ],
)