setup.py

from setuptools import setup, Extension
from setuptools.command.build_ext import build_ext

class my_build_ext(build_ext):
    def build_extensions(self):
        if self.compiler.compiler_type == 'unix':
            for e in self.extensions:
                e.extra_compile_args = ['-msse4.2', '-mbmi2', '-mavx2']

        build_ext.build_extensions(self)

    def finalize_options(self):
        build_ext.finalize_options(self)
        __builtins__.__NUMPY_SETUP__ = False
        import numpy
        self.include_dirs.append(numpy.get_include())

ext_modules = [
    Extension('cshogi._cshogi',
        ['cshogi/_cshogi.pyx',
         "src/bitboard.cpp", "src/common.cpp", "src/generateMoves.cpp", "src/hand.cpp", "src/init.cpp", "src/move.cpp", "src/mt64bit.cpp", "src/position.cpp", "src/search.cpp", "src/square.cpp", "src/usi.cpp", "src/book.cpp", "src/mate.cpp"],
        language='c++',
        include_dirs = ["src"],
        define_macros=[('HAVE_SSE4', None), ('HAVE_SSE42', None), ('HAVE_AVX2', None)]),
    Extension('cshogi.gym_shogi.envs.shogi_env',
        ['cshogi/gym_shogi/envs/shogi_env.pyx'],
        language='c++'),
    Extension('cshogi.gym_shogi.envs.shogi_vec_env',
        ['cshogi/gym_shogi/envs/shogi_vec_env.pyx'],
        language='c++'),
]

setup(
    name='cshogi',
    version='0.2.7',
    packages=['cshogi', 'cshogi.usi', 'cshogi.gym_shogi', 'cshogi.gym_shogi.envs'],
    ext_modules=ext_modules,
    cmdclass={'build_ext': my_build_ext},
    install_requires=['numpy', 'Cython'],
    author='Tadao Yamaoka',
    url='https://github.com/TadaoYamaoka/cshogi',
    description = 'A fast Python shogi library',
    classifiers=[
        "Programming Language :: Python :: 3",
        'License :: OSI Approved :: GNU General Public License (GPL)',
        "Operating System :: OS Independent",
    ],
)