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setup.py
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setup.py
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from setuptools import setup, find_packages, Extension
from setuptools.command.build_ext import build_ext
import sys
import setuptools
__version__ = "2.1.1"
class get_pybind_include(object):
"""Helper class to determine the pybind11 include path
The purpose of this class is to postpone importing pybind11
until it is actually installed, so that the ``get_include()``
method can be invoked."""
def __init__(self, user=False):
self.user = user
def __str__(self):
import pybind11
return pybind11.get_include(self.user)
ext_modules = [
Extension(
"pylanczoscpp",
["cpp/pylanczos.cpp"],
include_dirs=[get_pybind_include(), get_pybind_include(user=True), "include/"],
language="c++",
),
]
# 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++[11/14/17] compiler flag.
The newer version is prefered over c++11 (when it is available).
"""
flags = ["-std=c++17", "-std=c++14", "-std=c++11"]
for flag in flags:
if has_flag(compiler, flag):
return flag
raise RuntimeError("Unsupported compiler -- at least C++11 support " "is needed!")
class BuildExt(build_ext):
"""A custom build extension for adding compiler-specific options."""
include_path = "external/lambda-lanczos/include/lambda_lanczos"
c_opts = {
"msvc": ["/EHsc", "/I", include_path],
"unix": ["-I", include_path],
}
l_opts = {
"msvc": [],
"unix": [],
}
if sys.platform == "darwin":
darwin_opts = ["-stdlib=libc++", "-mmacosx-version-min=10.7"]
c_opts["unix"] += darwin_opts
l_opts["unix"] += darwin_opts
def build_extensions(self):
ct = self.compiler.compiler_type
opts = self.c_opts.get(ct, [])
link_opts = self.l_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 = opts
ext.extra_link_args = link_opts
build_ext.build_extensions(self)
try:
with open("README.md") as f:
readme = f.read()
except IOError:
readme = ""
setup(
name="pylanczos",
version=__version__,
author="mrcdr",
url="https://github.com/mrcdr/pylanczos",
description="Lanczos diagonalization library: Python interface with C++ implementation",
long_description_content_type="text/markdown",
long_description=readme,
license="MIT",
ext_modules=ext_modules,
install_requires=["pybind11>=2.2", "numpy"],
setup_requires=["pybind11>=2.2"],
cmdclass={"build_ext": BuildExt},
packages=find_packages(),
zip_safe=False,
)