setup.py

import os
import platform
import sys

import numpy as np
import pybind11
import setuptools
from setuptools import Extension, setup
from setuptools.command.build_ext import build_ext

__version__ = "0.6.1"


include_dirs = [
    pybind11.get_include(),
    np.get_include(),
]

# compatibility when run in python_bindings
bindings_dir = "python_bindings"
if bindings_dir in os.path.basename(os.getcwd()):
    source_files = ["./bindings.cpp"]
    include_dirs.extend([".."])
else:
    source_files = ["./python_bindings/bindings.cpp"]
    include_dirs.extend(["."])


libraries = []
extra_objects = []


ext_modules = [
    Extension(
        "hannlib",
        source_files,
        include_dirs=include_dirs,
        libraries=libraries,
        language="c++",
        extra_objects=extra_objects,
    )
]


# As of Python 3.6, CCompiler has a `has_flag` method.
# cf http://bugs.python.org/issue26689
def has_flag(compiler, flagname):
    """Return a boolean indicating whether a flag name is supported on
    the specified compiler.
    """
    import tempfile

    with tempfile.NamedTemporaryFile("w", suffix=".cpp") as f:
        f.write("int main (int argc, char **argv) { return 0; }")
        try:
            compiler.compile([f.name], extra_postargs=[flagname])
        except setuptools.distutils.errors.CompileError:
            return False
    return True


def cpp_flag(compiler):
    """Return the -std=c++[11/14] compiler flag.
    The c++14 is prefered over c++11 (when it is available).
    """
    if has_flag(compiler, "-std=c++14"):
        return "-std=c++14"
    elif has_flag(compiler, "-std=c++11"):
        return "-std=c++11"
    else:
        raise RuntimeError(
            "Unsupported compiler -- at least C++11 support " "is needed!"
        )


class BuildExt(build_ext):
    """A custom build extension for adding compiler-specific options."""

    c_opts = {
        "msvc": ["/EHsc", "/openmp", "/O2"],
        "unix": ["-O3", "-g"],  # , '-w'
    }
    if not os.environ.get("HANNLIB_NO_NATIVE"):
        c_opts["unix"].append("-march=native")

    link_opts = {
        "unix": [],
        "msvc": [],
    }

    if sys.platform == "darwin":
        if platform.machine() == "arm64":
            c_opts["unix"].remove("-march=native")
        c_opts["unix"] += ["-stdlib=libc++", "-mmacosx-version-min=10.7"]
        link_opts["unix"] += ["-stdlib=libc++", "-mmacosx-version-min=10.7"]
    else:
        c_opts["unix"].append("-fopenmp")
        link_opts["unix"].extend(["-fopenmp", "-pthread"])

    def build_extensions(self):
        ct = self.compiler.compiler_type
        opts = self.c_opts.get(ct, [])
        if ct == "unix":
            opts.append('-DVERSION_INFO="%s"' % self.distribution.get_version())
            opts.append(cpp_flag(self.compiler))
            if has_flag(self.compiler, "-fvisibility=hidden"):
                opts.append("-fvisibility=hidden")
        elif ct == "msvc":
            opts.append('/DVERSION_INFO=\\"%s\\"' % self.distribution.get_version())

        for ext in self.extensions:
            ext.extra_compile_args.extend(opts)
            ext.extra_link_args.extend(self.link_opts.get(ct, []))

        build_ext.build_extensions(self)


setup(
    name="hannlib",
    version=__version__,
    description="hannlib",
    author="Yury Malkov and others",
    url="https://github.com/yurymalkov/hnsw",
    long_description="""hnsw""",
    ext_modules=ext_modules,
    install_requires=["numpy"],
    cmdclass={"build_ext": BuildExt},
    zip_safe=False,
)