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import os
import sys
import platform
import numpy as np
import pybind11
import setuptools
from setuptools import Extension, setup
from setuptools.command.build_ext import build_ext
__version__ = '0.8.0'
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(['../hnswlib/'])
else:
source_files = ['./python_bindings/bindings.cpp']
include_dirs.extend(['./hnswlib/'])
libraries = []
extra_objects = []
ext_modules = [
Extension(
'hnswlib',
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."""
compiler_flag_native = '-march=native'
c_opts = {
'msvc': ['/EHsc', '/openmp', '/O2'],
'unix': ['-O3', compiler_flag_native], # , '-w'
}
link_opts = {
'unix': [],
'msvc': [],
}
if os.environ.get("HNSWLIB_NO_NATIVE"):
c_opts['unix'].remove(compiler_flag_native)
if sys.platform == 'darwin':
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', '-shared'])
def build_extensions(self):
ct = self.compiler.compiler_type
opts = BuildExt.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')
if not os.environ.get("HNSWLIB_NO_NATIVE"):
# check that native flag is available
print('checking avalability of flag:', BuildExt.compiler_flag_native)
if not has_flag(self.compiler, BuildExt.compiler_flag_native):
print('removing unsupported compiler flag:', BuildExt.compiler_flag_native)
opts.remove(BuildExt.compiler_flag_native)
# for macos add apple-m1 flag if it's available
if sys.platform == 'darwin':
m1_flag = '-mcpu=apple-m1'
print('checking avalability of flag:', m1_flag)
if has_flag(self.compiler, m1_flag):
print('adding flag:', m1_flag)
opts.append(m1_flag)
else:
print(f'flag: {m1_flag} is not available')
else:
print(f'flag: {BuildExt.compiler_flag_native} is available')
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(BuildExt.link_opts.get(ct, []))
build_ext.build_extensions(self)
setup(
name='hnswlib',
version=__version__,
description='hnswlib',
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,
)
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