setup.py - external/github.com/grpc/grpc - Git at Google

 # Copyright 2015 gRPC authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.

 """A setup module for the GRPC Python package."""
 from distutils import cygwinccompiler
 from distutils import extension as _extension
 from distutils import util
 import os
 import os.path
 import pkg_resources
 import platform
 import re
 import shlex
 import shutil
 import sys
 import sysconfig

 import setuptools
 from setuptools.command import egg_info

 # Redirect the manifest template from MANIFEST.in to PYTHON-MANIFEST.in.
 egg_info.manifest_maker.template = 'PYTHON-MANIFEST.in'

 PY3 = sys.version_info.major == 3
 PYTHON_STEM = os.path.join('src', 'python', 'grpcio')
 CORE_INCLUDE = ('include', '.',)
 SSL_INCLUDE = (os.path.join('third_party', 'boringssl', 'include'),)
 ZLIB_INCLUDE = (os.path.join('third_party', 'zlib'),)
 NANOPB_INCLUDE = (os.path.join('third_party', 'nanopb'),)
 CARES_INCLUDE = (
     os.path.join('third_party', 'cares'),
     os.path.join('third_party', 'cares', 'cares'),)
 if 'darwin' in sys.platform:
   CARES_INCLUDE += (os.path.join('third_party', 'cares', 'config_darwin'),)
 if 'freebsd' in sys.platform:
   CARES_INCLUDE += (os.path.join('third_party', 'cares', 'config_freebsd'),)
 if 'linux' in sys.platform:
   CARES_INCLUDE += (os.path.join('third_party', 'cares', 'config_linux'),)
 if 'openbsd' in sys.platform:
   CARES_INCLUDE += (os.path.join('third_party', 'cares', 'config_openbsd'),)
 ADDRESS_SORTING_INCLUDE = (os.path.join('third_party', 'address_sorting', 'include'),)
 README = os.path.join(PYTHON_STEM, 'README.rst')

 # Ensure we're in the proper directory whether or not we're being used by pip.
 os.chdir(os.path.dirname(os.path.abspath(__file__)))
 sys.path.insert(0, os.path.abspath(PYTHON_STEM))

 # Break import-style to ensure we can actually find our in-repo dependencies.
 import _parallel_compile_patch
 import _spawn_patch
 import commands
 import grpc_core_dependencies
 import grpc_version

 _parallel_compile_patch.monkeypatch_compile_maybe()
 _spawn_patch.monkeypatch_spawn()

 LICENSE = 'Apache License 2.0'

 CLASSIFIERS = [
     'Development Status :: 5 - Production/Stable',
     'Programming Language :: Python',
     'Programming Language :: Python :: 2',
     'Programming Language :: Python :: 2.7',
     'Programming Language :: Python :: 3',
     'Programming Language :: Python :: 3.4',
     'Programming Language :: Python :: 3.5',
     'Programming Language :: Python :: 3.6',
     'License :: OSI Approved :: Apache Software License',
 ]

 # Environment variable to determine whether or not the Cython extension should
 # *use* Cython or use the generated C files. Note that this requires the C files
 # to have been generated by building first *with* Cython support. Even if this
 # is set to false, if the script detects that the generated `.c` file isn't
 # present, then it will still attempt to use Cython.
 BUILD_WITH_CYTHON = os.environ.get('GRPC_PYTHON_BUILD_WITH_CYTHON', False)


 # Export this variable to use the system installation of openssl. You need to
 # have the header files installed (in /usr/include/openssl) and during
 # runtime, the shared library must be installed
 BUILD_WITH_SYSTEM_OPENSSL = os.environ.get('GRPC_PYTHON_BUILD_SYSTEM_OPENSSL',
                                            False)

 # Export this variable to use the system installation of zlib. You need to
 # have the header files installed (in /usr/include/) and during
 # runtime, the shared library must be installed
 BUILD_WITH_SYSTEM_ZLIB = os.environ.get('GRPC_PYTHON_BUILD_SYSTEM_ZLIB',
                                         False)

 # Export this variable to use the system installation of cares. You need to
 # have the header files installed (in /usr/include/) and during
 # runtime, the shared library must be installed
 BUILD_WITH_SYSTEM_CARES = os.environ.get('GRPC_PYTHON_BUILD_SYSTEM_CARES',
                                          False)

 # For local development use only: This skips building gRPC Core and its
 # dependencies, including protobuf and boringssl. This allows "incremental"
 # compilation by first building gRPC Core using make, then building only the
 # Python/Cython layers here.
 #
 # Note that this requires libboringssl.a in the libs/{dbg,opt}/ directory, which
 # may require configuring make to not use the system openssl implementation:
 #
 #    make HAS_SYSTEM_OPENSSL_ALPN=0
 #
 # TODO(ericgribkoff) Respect the BUILD_WITH_SYSTEM_* flags alongside this option
 USE_PREBUILT_GRPC_CORE = os.environ.get(
     'GRPC_PYTHON_USE_PREBUILT_GRPC_CORE', False)


 # If this environmental variable is set, GRPC will not try to be compatible with
 # libc versions old than the one it was compiled against.
 DISABLE_LIBC_COMPATIBILITY = os.environ.get('GRPC_PYTHON_DISABLE_LIBC_COMPATIBILITY', False)

 # Environment variable to determine whether or not to enable coverage analysis
 # in Cython modules.
 ENABLE_CYTHON_TRACING = os.environ.get(
     'GRPC_PYTHON_ENABLE_CYTHON_TRACING', False)

 # Environment variable specifying whether or not there's interest in setting up
 # documentation building.
 ENABLE_DOCUMENTATION_BUILD = os.environ.get(
     'GRPC_PYTHON_ENABLE_DOCUMENTATION_BUILD', False)

 # There are some situations (like on Windows) where CC, CFLAGS, and LDFLAGS are
 # entirely ignored/dropped/forgotten by distutils and its Cygwin/MinGW support.
 # We use these environment variables to thus get around that without locking
 # ourselves in w.r.t. the multitude of operating systems this ought to build on.
 # We can also use these variables as a way to inject environment-specific
 # compiler/linker flags. We assume GCC-like compilers and/or MinGW as a
 # reasonable default.
 EXTRA_ENV_COMPILE_ARGS = os.environ.get('GRPC_PYTHON_CFLAGS', None)
 EXTRA_ENV_LINK_ARGS = os.environ.get('GRPC_PYTHON_LDFLAGS', None)
 if EXTRA_ENV_COMPILE_ARGS is None:
   EXTRA_ENV_COMPILE_ARGS = ' -std=c++11'
   if 'win32' in sys.platform and sys.version_info < (3, 5):
     EXTRA_ENV_COMPILE_ARGS += ' -D_hypot=hypot'
     # We use define flags here and don't directly add to DEFINE_MACROS below to
     # ensure that the expert user/builder has a way of turning it off (via the
     # envvars) without adding yet more GRPC-specific envvars.
     # See https://sourceforge.net/p/mingw-w64/bugs/363/
     if '32' in platform.architecture()[0]:
       EXTRA_ENV_COMPILE_ARGS += ' -D_ftime=_ftime32 -D_timeb=__timeb32 -D_ftime_s=_ftime32_s'
     else:
       EXTRA_ENV_COMPILE_ARGS += ' -D_ftime=_ftime64 -D_timeb=__timeb64'
   elif "linux" in sys.platform:
     EXTRA_ENV_COMPILE_ARGS += ' -std=gnu99 -fvisibility=hidden -fno-wrapv -fno-exceptions'
   elif "darwin" in sys.platform:
     EXTRA_ENV_COMPILE_ARGS += ' -stdlib=libc++ -fvisibility=hidden -fno-wrapv -fno-exceptions'
 EXTRA_ENV_COMPILE_ARGS += ' -DPB_FIELD_32BIT'

 if EXTRA_ENV_LINK_ARGS is None:
   EXTRA_ENV_LINK_ARGS = ''
   if "linux" in sys.platform or "darwin" in sys.platform:
     EXTRA_ENV_LINK_ARGS += ' -lpthread'
   elif "win32" in sys.platform and sys.version_info < (3, 5):
     msvcr = cygwinccompiler.get_msvcr()[0]
     # TODO(atash) sift through the GCC specs to see if libstdc++ can have any
     # influence on the linkage outcome on MinGW for non-C++ programs.
     EXTRA_ENV_LINK_ARGS += (
         ' -static-libgcc -static-libstdc++ -mcrtdll={msvcr} '
         '-static'.format(msvcr=msvcr))
   if "linux" in sys.platform:
     EXTRA_ENV_LINK_ARGS += ' -Wl,-wrap,memcpy  -static-libgcc'

 EXTRA_COMPILE_ARGS = shlex.split(EXTRA_ENV_COMPILE_ARGS)
 EXTRA_LINK_ARGS = shlex.split(EXTRA_ENV_LINK_ARGS)

 CYTHON_EXTENSION_PACKAGE_NAMES = ()

 CYTHON_EXTENSION_MODULE_NAMES = ('grpc._cython.cygrpc',)

 CYTHON_HELPER_C_FILES = ()

 CORE_C_FILES = tuple(grpc_core_dependencies.CORE_SOURCE_FILES)
 if "win32" in sys.platform:
   CORE_C_FILES = filter(lambda x: 'third_party/cares' not in x, CORE_C_FILES)

 if BUILD_WITH_SYSTEM_OPENSSL:
   CORE_C_FILES = filter(lambda x: 'third_party/boringssl' not in x, CORE_C_FILES)
   CORE_C_FILES = filter(lambda x: 'src/boringssl' not in x, CORE_C_FILES)
   SSL_INCLUDE = (os.path.join('/usr', 'include', 'openssl'),)

 if BUILD_WITH_SYSTEM_ZLIB:
   CORE_C_FILES = filter(lambda x: 'third_party/zlib' not in x, CORE_C_FILES)
   ZLIB_INCLUDE = (os.path.join('/usr', 'include'),)

 if BUILD_WITH_SYSTEM_CARES:
   CORE_C_FILES = filter(lambda x: 'third_party/cares' not in x, CORE_C_FILES)
   CARES_INCLUDE = (os.path.join('/usr', 'include'),)

 EXTENSION_INCLUDE_DIRECTORIES = (
     (PYTHON_STEM,) + CORE_INCLUDE + SSL_INCLUDE + ZLIB_INCLUDE +
     NANOPB_INCLUDE + CARES_INCLUDE + ADDRESS_SORTING_INCLUDE)

 EXTENSION_LIBRARIES = ()
 if "linux" in sys.platform:
   EXTENSION_LIBRARIES += ('rt',)
 if not "win32" in sys.platform:
   EXTENSION_LIBRARIES += ('m',)
 if "win32" in sys.platform:
   EXTENSION_LIBRARIES += ('advapi32', 'ws2_32',)
 if BUILD_WITH_SYSTEM_OPENSSL:
   EXTENSION_LIBRARIES += ('ssl', 'crypto',)
 if BUILD_WITH_SYSTEM_ZLIB:
   EXTENSION_LIBRARIES += ('z',)
 if BUILD_WITH_SYSTEM_CARES:
   EXTENSION_LIBRARIES += ('cares',)

 DEFINE_MACROS = (('OPENSSL_NO_ASM', 1), ('_WIN32_WINNT', 0x600))
 if not DISABLE_LIBC_COMPATIBILITY:
   DEFINE_MACROS += (('GPR_BACKWARDS_COMPATIBILITY_MODE', 1),)
 if "win32" in sys.platform:
   # TODO(zyc): Re-enable c-ares on x64 and x86 windows after fixing the
   # ares_library_init compilation issue
   DEFINE_MACROS += (('WIN32_LEAN_AND_MEAN', 1), ('CARES_STATICLIB', 1),
                     ('GRPC_ARES', 0), ('NTDDI_VERSION', 0x06000000),
                     ('NOMINMAX', 1),)
   if '64bit' in platform.architecture()[0]:
     DEFINE_MACROS += (('MS_WIN64', 1),)
   elif sys.version_info >= (3, 5):
     # For some reason, this is needed to get access to inet_pton/inet_ntop
     # on msvc, but only for 32 bits
     DEFINE_MACROS += (('NTDDI_VERSION', 0x06000000),)
 else:
   DEFINE_MACROS += (('HAVE_CONFIG_H', 1), ('GRPC_ENABLE_FORK_SUPPORT', 1),)

 LDFLAGS = tuple(EXTRA_LINK_ARGS)
 CFLAGS = tuple(EXTRA_COMPILE_ARGS)
 if "linux" in sys.platform or "darwin" in sys.platform:
   pymodinit_type = 'PyObject*' if PY3 else 'void'
   pymodinit = 'extern "C" __attribute__((visibility ("default"))) {}'.format(pymodinit_type)
   DEFINE_MACROS += (('PyMODINIT_FUNC', pymodinit),)
   DEFINE_MACROS += (('GRPC_POSIX_FORK_ALLOW_PTHREAD_ATFORK', 1),)

 # By default, Python3 distutils enforces compatibility of
 # c plugins (.so files) with the OSX version Python3 was built with.
 # For Python3.4, this is OSX 10.6, but we need Thread Local Support (__thread)
 if 'darwin' in sys.platform and PY3:
   mac_target = sysconfig.get_config_var('MACOSX_DEPLOYMENT_TARGET')
   if mac_target and (pkg_resources.parse_version(mac_target) <
                      pkg_resources.parse_version('10.7.0')):
     os.environ['MACOSX_DEPLOYMENT_TARGET'] = '10.7'
     os.environ['_PYTHON_HOST_PLATFORM'] = re.sub(
         r'macosx-[0-9]+\.[0-9]+-(.+)',
         r'macosx-10.7-\1',
         util.get_platform())

 def cython_extensions_and_necessity():
   cython_module_files = [os.path.join(PYTHON_STEM,
                                name.replace('.', '/') + '.pyx')
                   for name in CYTHON_EXTENSION_MODULE_NAMES]
   config = os.environ.get('CONFIG', 'opt')
   prefix = 'libs/' + config + '/'
   if USE_PREBUILT_GRPC_CORE:
     extra_objects = [prefix + 'libares.a',
                      prefix + 'libboringssl.a',
                      prefix + 'libgpr.a',
                      prefix + 'libgrpc.a']
     core_c_files = []
   else:
     core_c_files = list(CORE_C_FILES)
     extra_objects = []
   extensions = [
       _extension.Extension(
           name=module_name,
           sources=[module_file] + list(CYTHON_HELPER_C_FILES) + core_c_files,
           include_dirs=list(EXTENSION_INCLUDE_DIRECTORIES),
           libraries=list(EXTENSION_LIBRARIES),
           define_macros=list(DEFINE_MACROS),
           extra_objects=extra_objects,
           extra_compile_args=list(CFLAGS),
           extra_link_args=list(LDFLAGS),
       ) for (module_name, module_file) in zip(list(CYTHON_EXTENSION_MODULE_NAMES), cython_module_files)
   ]
   need_cython = BUILD_WITH_CYTHON
   if not BUILD_WITH_CYTHON:
     need_cython = need_cython or not commands.check_and_update_cythonization(extensions)
   return commands.try_cythonize(extensions, linetracing=ENABLE_CYTHON_TRACING, mandatory=BUILD_WITH_CYTHON), need_cython

 CYTHON_EXTENSION_MODULES, need_cython = cython_extensions_and_necessity()

 PACKAGE_DIRECTORIES = {
     '': PYTHON_STEM,
 }

 INSTALL_REQUIRES = (
     "six>=1.5.2",
     "futures>=2.2.0; python_version<'3.2'",
     "enum34>=1.0.4; python_version<'3.4'",
 )

 SETUP_REQUIRES = INSTALL_REQUIRES + (
     'Sphinx~=1.8.1',
     'six>=1.10',
   ) if ENABLE_DOCUMENTATION_BUILD else ()

 try:
   import Cython
 except ImportError:
   if BUILD_WITH_CYTHON:
     sys.stderr.write(
       "You requested a Cython build via GRPC_PYTHON_BUILD_WITH_CYTHON, "
       "but do not have Cython installed. We won't stop you from using "
       "other commands, but the extension files will fail to build.\n")
   elif need_cython:
     sys.stderr.write(
         'We could not find Cython. Setup may take 10-20 minutes.\n')
     SETUP_REQUIRES += ('cython>=0.23',)

 COMMAND_CLASS = {
     'doc': commands.SphinxDocumentation,
     'build_project_metadata': commands.BuildProjectMetadata,
     'build_py': commands.BuildPy,
     'build_ext': commands.BuildExt,
     'gather': commands.Gather,
 }

 # Ensure that package data is copied over before any commands have been run:
 credentials_dir = os.path.join(PYTHON_STEM, 'grpc', '_cython', '_credentials')
 try:
   os.mkdir(credentials_dir)
 except OSError:
   pass
 shutil.copyfile(os.path.join('etc', 'roots.pem'),
                 os.path.join(credentials_dir, 'roots.pem'))

 PACKAGE_DATA = {
     # Binaries that may or may not be present in the final installation, but are
     # mentioned here for completeness.
     'grpc._cython': [
         '_credentials/roots.pem',
         '_windows/grpc_c.32.python',
         '_windows/grpc_c.64.python',
     ],
 }
 PACKAGES = setuptools.find_packages(PYTHON_STEM)

 setuptools.setup(
   name='grpcio',
   version=grpc_version.VERSION,
   description='HTTP/2-based RPC framework',
   author='The gRPC Authors',
   author_email='grpc-io@googlegroups.com',
   url='https://grpc.io',
   license=LICENSE,
   classifiers=CLASSIFIERS,
   long_description=open(README).read(),
   ext_modules=CYTHON_EXTENSION_MODULES,
   packages=list(PACKAGES),
   package_dir=PACKAGE_DIRECTORIES,
   package_data=PACKAGE_DATA,
   install_requires=INSTALL_REQUIRES,
   setup_requires=SETUP_REQUIRES,
   cmdclass=COMMAND_CLASS,
 )
	# Copyright 2015 gRPC authors.
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.

	"""A setup module for the GRPC Python package."""
	from distutils import cygwinccompiler
	from distutils import extension as _extension
	from distutils import util
	import os
	import os.path
	import pkg_resources
	import platform
	import re
	import shlex
	import shutil
	import sys
	import sysconfig

	import setuptools
	from setuptools.command import egg_info

	# Redirect the manifest template from MANIFEST.in to PYTHON-MANIFEST.in.
	egg_info.manifest_maker.template = 'PYTHON-MANIFEST.in'

	PY3 = sys.version_info.major == 3
	PYTHON_STEM = os.path.join('src', 'python', 'grpcio')
	CORE_INCLUDE = ('include', '.',)
	SSL_INCLUDE = (os.path.join('third_party', 'boringssl', 'include'),)
	ZLIB_INCLUDE = (os.path.join('third_party', 'zlib'),)
	NANOPB_INCLUDE = (os.path.join('third_party', 'nanopb'),)
	CARES_INCLUDE = (
	os.path.join('third_party', 'cares'),
	os.path.join('third_party', 'cares', 'cares'),)
	if 'darwin' in sys.platform:
	CARES_INCLUDE += (os.path.join('third_party', 'cares', 'config_darwin'),)
	if 'freebsd' in sys.platform:
	CARES_INCLUDE += (os.path.join('third_party', 'cares', 'config_freebsd'),)
	if 'linux' in sys.platform:
	CARES_INCLUDE += (os.path.join('third_party', 'cares', 'config_linux'),)
	if 'openbsd' in sys.platform:
	CARES_INCLUDE += (os.path.join('third_party', 'cares', 'config_openbsd'),)
	ADDRESS_SORTING_INCLUDE = (os.path.join('third_party', 'address_sorting', 'include'),)
	README = os.path.join(PYTHON_STEM, 'README.rst')

	# Ensure we're in the proper directory whether or not we're being used by pip.
	os.chdir(os.path.dirname(os.path.abspath(__file__)))
	sys.path.insert(0, os.path.abspath(PYTHON_STEM))

	# Break import-style to ensure we can actually find our in-repo dependencies.
	import _parallel_compile_patch
	import _spawn_patch
	import commands
	import grpc_core_dependencies
	import grpc_version

	_parallel_compile_patch.monkeypatch_compile_maybe()
	_spawn_patch.monkeypatch_spawn()

	LICENSE = 'Apache License 2.0'

	CLASSIFIERS = [
	'Development Status :: 5 - Production/Stable',
	'Programming Language :: Python',
	'Programming Language :: Python :: 2',
	'Programming Language :: Python :: 2.7',
	'Programming Language :: Python :: 3',
	'Programming Language :: Python :: 3.4',
	'Programming Language :: Python :: 3.5',
	'Programming Language :: Python :: 3.6',
	'License :: OSI Approved :: Apache Software License',
	]

	# Environment variable to determine whether or not the Cython extension should
	# use Cython or use the generated C files. Note that this requires the C files
	# to have been generated by building first with Cython support. Even if this
	# is set to false, if the script detects that the generated `.c` file isn't
	# present, then it will still attempt to use Cython.
	BUILD_WITH_CYTHON = os.environ.get('GRPC_PYTHON_BUILD_WITH_CYTHON', False)


	# Export this variable to use the system installation of openssl. You need to
	# have the header files installed (in /usr/include/openssl) and during
	# runtime, the shared library must be installed
	BUILD_WITH_SYSTEM_OPENSSL = os.environ.get('GRPC_PYTHON_BUILD_SYSTEM_OPENSSL',
	False)

	# Export this variable to use the system installation of zlib. You need to
	# have the header files installed (in /usr/include/) and during
	# runtime, the shared library must be installed
	BUILD_WITH_SYSTEM_ZLIB = os.environ.get('GRPC_PYTHON_BUILD_SYSTEM_ZLIB',
	False)

	# Export this variable to use the system installation of cares. You need to
	# have the header files installed (in /usr/include/) and during
	# runtime, the shared library must be installed
	BUILD_WITH_SYSTEM_CARES = os.environ.get('GRPC_PYTHON_BUILD_SYSTEM_CARES',
	False)

	# For local development use only: This skips building gRPC Core and its
	# dependencies, including protobuf and boringssl. This allows "incremental"
	# compilation by first building gRPC Core using make, then building only the
	# Python/Cython layers here.
	#
	# Note that this requires libboringssl.a in the libs/{dbg,opt}/ directory, which
	# may require configuring make to not use the system openssl implementation:
	#
	# make HAS_SYSTEM_OPENSSL_ALPN=0
	#
	# TODO(ericgribkoff) Respect the BUILD_WITH_SYSTEM_* flags alongside this option
	USE_PREBUILT_GRPC_CORE = os.environ.get(
	'GRPC_PYTHON_USE_PREBUILT_GRPC_CORE', False)


	# If this environmental variable is set, GRPC will not try to be compatible with
	# libc versions old than the one it was compiled against.
	DISABLE_LIBC_COMPATIBILITY = os.environ.get('GRPC_PYTHON_DISABLE_LIBC_COMPATIBILITY', False)

	# Environment variable to determine whether or not to enable coverage analysis
	# in Cython modules.
	ENABLE_CYTHON_TRACING = os.environ.get(
	'GRPC_PYTHON_ENABLE_CYTHON_TRACING', False)

	# Environment variable specifying whether or not there's interest in setting up
	# documentation building.
	ENABLE_DOCUMENTATION_BUILD = os.environ.get(
	'GRPC_PYTHON_ENABLE_DOCUMENTATION_BUILD', False)

	# There are some situations (like on Windows) where CC, CFLAGS, and LDFLAGS are
	# entirely ignored/dropped/forgotten by distutils and its Cygwin/MinGW support.
	# We use these environment variables to thus get around that without locking
	# ourselves in w.r.t. the multitude of operating systems this ought to build on.
	# We can also use these variables as a way to inject environment-specific
	# compiler/linker flags. We assume GCC-like compilers and/or MinGW as a
	# reasonable default.
	EXTRA_ENV_COMPILE_ARGS = os.environ.get('GRPC_PYTHON_CFLAGS', None)
	EXTRA_ENV_LINK_ARGS = os.environ.get('GRPC_PYTHON_LDFLAGS', None)
	if EXTRA_ENV_COMPILE_ARGS is None:
	EXTRA_ENV_COMPILE_ARGS = ' -std=c++11'
	if 'win32' in sys.platform and sys.version_info < (3, 5):
	EXTRA_ENV_COMPILE_ARGS += ' -D_hypot=hypot'
	# We use define flags here and don't directly add to DEFINE_MACROS below to
	# ensure that the expert user/builder has a way of turning it off (via the
	# envvars) without adding yet more GRPC-specific envvars.
	# See https://sourceforge.net/p/mingw-w64/bugs/363/
	if '32' in platform.architecture()[0]:
	EXTRA_ENV_COMPILE_ARGS += ' -D_ftime=_ftime32 -D_timeb=__timeb32 -D_ftime_s=_ftime32_s'
	else:
	EXTRA_ENV_COMPILE_ARGS += ' -D_ftime=_ftime64 -D_timeb=__timeb64'
	elif "linux" in sys.platform:
	EXTRA_ENV_COMPILE_ARGS += ' -std=gnu99 -fvisibility=hidden -fno-wrapv -fno-exceptions'
	elif "darwin" in sys.platform:
	EXTRA_ENV_COMPILE_ARGS += ' -stdlib=libc++ -fvisibility=hidden -fno-wrapv -fno-exceptions'
	EXTRA_ENV_COMPILE_ARGS += ' -DPB_FIELD_32BIT'

	if EXTRA_ENV_LINK_ARGS is None:
	EXTRA_ENV_LINK_ARGS = ''
	if "linux" in sys.platform or "darwin" in sys.platform:
	EXTRA_ENV_LINK_ARGS += ' -lpthread'
	elif "win32" in sys.platform and sys.version_info < (3, 5):
	msvcr = cygwinccompiler.get_msvcr()[0]
	# TODO(atash) sift through the GCC specs to see if libstdc++ can have any
	# influence on the linkage outcome on MinGW for non-C++ programs.
	EXTRA_ENV_LINK_ARGS += (
	' -static-libgcc -static-libstdc++ -mcrtdll={msvcr} '
	'-static'.format(msvcr=msvcr))
	if "linux" in sys.platform:
	EXTRA_ENV_LINK_ARGS += ' -Wl,-wrap,memcpy -static-libgcc'

	EXTRA_COMPILE_ARGS = shlex.split(EXTRA_ENV_COMPILE_ARGS)
	EXTRA_LINK_ARGS = shlex.split(EXTRA_ENV_LINK_ARGS)

	CYTHON_EXTENSION_PACKAGE_NAMES = ()

	CYTHON_EXTENSION_MODULE_NAMES = ('grpc._cython.cygrpc',)

	CYTHON_HELPER_C_FILES = ()

	CORE_C_FILES = tuple(grpc_core_dependencies.CORE_SOURCE_FILES)
	if "win32" in sys.platform:
	CORE_C_FILES = filter(lambda x: 'third_party/cares' not in x, CORE_C_FILES)

	if BUILD_WITH_SYSTEM_OPENSSL:
	CORE_C_FILES = filter(lambda x: 'third_party/boringssl' not in x, CORE_C_FILES)
	CORE_C_FILES = filter(lambda x: 'src/boringssl' not in x, CORE_C_FILES)
	SSL_INCLUDE = (os.path.join('/usr', 'include', 'openssl'),)

	if BUILD_WITH_SYSTEM_ZLIB:
	CORE_C_FILES = filter(lambda x: 'third_party/zlib' not in x, CORE_C_FILES)
	ZLIB_INCLUDE = (os.path.join('/usr', 'include'),)

	if BUILD_WITH_SYSTEM_CARES:
	CORE_C_FILES = filter(lambda x: 'third_party/cares' not in x, CORE_C_FILES)
	CARES_INCLUDE = (os.path.join('/usr', 'include'),)

	EXTENSION_INCLUDE_DIRECTORIES = (
	(PYTHON_STEM,) + CORE_INCLUDE + SSL_INCLUDE + ZLIB_INCLUDE +
	NANOPB_INCLUDE + CARES_INCLUDE + ADDRESS_SORTING_INCLUDE)

	EXTENSION_LIBRARIES = ()
	if "linux" in sys.platform:
	EXTENSION_LIBRARIES += ('rt',)
	if not "win32" in sys.platform:
	EXTENSION_LIBRARIES += ('m',)
	if "win32" in sys.platform:
	EXTENSION_LIBRARIES += ('advapi32', 'ws2_32',)
	if BUILD_WITH_SYSTEM_OPENSSL:
	EXTENSION_LIBRARIES += ('ssl', 'crypto',)
	if BUILD_WITH_SYSTEM_ZLIB:
	EXTENSION_LIBRARIES += ('z',)
	if BUILD_WITH_SYSTEM_CARES:
	EXTENSION_LIBRARIES += ('cares',)

	DEFINE_MACROS = (('OPENSSL_NO_ASM', 1), ('_WIN32_WINNT', 0x600))
	if not DISABLE_LIBC_COMPATIBILITY:
	DEFINE_MACROS += (('GPR_BACKWARDS_COMPATIBILITY_MODE', 1),)
	if "win32" in sys.platform:
	# TODO(zyc): Re-enable c-ares on x64 and x86 windows after fixing the
	# ares_library_init compilation issue
	DEFINE_MACROS += (('WIN32_LEAN_AND_MEAN', 1), ('CARES_STATICLIB', 1),
	('GRPC_ARES', 0), ('NTDDI_VERSION', 0x06000000),
	('NOMINMAX', 1),)
	if '64bit' in platform.architecture()[0]:
	DEFINE_MACROS += (('MS_WIN64', 1),)
	elif sys.version_info >= (3, 5):
	# For some reason, this is needed to get access to inet_pton/inet_ntop
	# on msvc, but only for 32 bits
	DEFINE_MACROS += (('NTDDI_VERSION', 0x06000000),)
	else:
	DEFINE_MACROS += (('HAVE_CONFIG_H', 1), ('GRPC_ENABLE_FORK_SUPPORT', 1),)

	LDFLAGS = tuple(EXTRA_LINK_ARGS)
	CFLAGS = tuple(EXTRA_COMPILE_ARGS)
	if "linux" in sys.platform or "darwin" in sys.platform:
	pymodinit_type = 'PyObject*' if PY3 else 'void'
	pymodinit = 'extern "C" __attribute__((visibility ("default"))) {}'.format(pymodinit_type)
	DEFINE_MACROS += (('PyMODINIT_FUNC', pymodinit),)
	DEFINE_MACROS += (('GRPC_POSIX_FORK_ALLOW_PTHREAD_ATFORK', 1),)

	# By default, Python3 distutils enforces compatibility of
	# c plugins (.so files) with the OSX version Python3 was built with.
	# For Python3.4, this is OSX 10.6, but we need Thread Local Support (__thread)
	if 'darwin' in sys.platform and PY3:
	mac_target = sysconfig.get_config_var('MACOSX_DEPLOYMENT_TARGET')
	if mac_target and (pkg_resources.parse_version(mac_target) <
	pkg_resources.parse_version('10.7.0')):
	os.environ['MACOSX_DEPLOYMENT_TARGET'] = '10.7'
	os.environ['_PYTHON_HOST_PLATFORM'] = re.sub(
	r'macosx-[0-9]+\.[0-9]+-(.+)',
	r'macosx-10.7-\1',
	util.get_platform())

	def cython_extensions_and_necessity():
	cython_module_files = [os.path.join(PYTHON_STEM,
	name.replace('.', '/') + '.pyx')
	for name in CYTHON_EXTENSION_MODULE_NAMES]
	config = os.environ.get('CONFIG', 'opt')
	prefix = 'libs/' + config + '/'
	if USE_PREBUILT_GRPC_CORE:
	extra_objects = [prefix + 'libares.a',
	prefix + 'libboringssl.a',
	prefix + 'libgpr.a',
	prefix + 'libgrpc.a']
	core_c_files = []
	else:
	core_c_files = list(CORE_C_FILES)
	extra_objects = []
	extensions = [
	_extension.Extension(
	name=module_name,
	sources=[module_file] + list(CYTHON_HELPER_C_FILES) + core_c_files,
	include_dirs=list(EXTENSION_INCLUDE_DIRECTORIES),
	libraries=list(EXTENSION_LIBRARIES),
	define_macros=list(DEFINE_MACROS),
	extra_objects=extra_objects,
	extra_compile_args=list(CFLAGS),
	extra_link_args=list(LDFLAGS),
	) for (module_name, module_file) in zip(list(CYTHON_EXTENSION_MODULE_NAMES), cython_module_files)
	]
	need_cython = BUILD_WITH_CYTHON
	if not BUILD_WITH_CYTHON:
	need_cython = need_cython or not commands.check_and_update_cythonization(extensions)
	return commands.try_cythonize(extensions, linetracing=ENABLE_CYTHON_TRACING, mandatory=BUILD_WITH_CYTHON), need_cython

	CYTHON_EXTENSION_MODULES, need_cython = cython_extensions_and_necessity()

	PACKAGE_DIRECTORIES = {
	'': PYTHON_STEM,
	}

	INSTALL_REQUIRES = (
	"six>=1.5.2",
	"futures>=2.2.0; python_version<'3.2'",
	"enum34>=1.0.4; python_version<'3.4'",
	)

	SETUP_REQUIRES = INSTALL_REQUIRES + (
	'Sphinx~=1.8.1',
	'six>=1.10',
	) if ENABLE_DOCUMENTATION_BUILD else ()

	try:
	import Cython
	except ImportError:
	if BUILD_WITH_CYTHON:
	sys.stderr.write(
	"You requested a Cython build via GRPC_PYTHON_BUILD_WITH_CYTHON, "
	"but do not have Cython installed. We won't stop you from using "
	"other commands, but the extension files will fail to build.\n")
	elif need_cython:
	sys.stderr.write(
	'We could not find Cython. Setup may take 10-20 minutes.\n')
	SETUP_REQUIRES += ('cython>=0.23',)

	COMMAND_CLASS = {
	'doc': commands.SphinxDocumentation,
	'build_project_metadata': commands.BuildProjectMetadata,
	'build_py': commands.BuildPy,
	'build_ext': commands.BuildExt,
	'gather': commands.Gather,
	}

	# Ensure that package data is copied over before any commands have been run:
	credentials_dir = os.path.join(PYTHON_STEM, 'grpc', '_cython', '_credentials')
	try:
	os.mkdir(credentials_dir)
	except OSError:
	pass
	shutil.copyfile(os.path.join('etc', 'roots.pem'),
	os.path.join(credentials_dir, 'roots.pem'))

	PACKAGE_DATA = {
	# Binaries that may or may not be present in the final installation, but are
	# mentioned here for completeness.
	'grpc._cython': [
	'_credentials/roots.pem',
	'_windows/grpc_c.32.python',
	'_windows/grpc_c.64.python',
	],
	}
	PACKAGES = setuptools.find_packages(PYTHON_STEM)

	setuptools.setup(
	name='grpcio',
	version=grpc_version.VERSION,
	description='HTTP/2-based RPC framework',
	author='The gRPC Authors',
	author_email='grpc-io@googlegroups.com',
	url='https://grpc.io',
	license=LICENSE,
	classifiers=CLASSIFIERS,
	long_description=open(README).read(),
	ext_modules=CYTHON_EXTENSION_MODULES,
	packages=list(PACKAGES),
	package_dir=PACKAGE_DIRECTORIES,
	package_data=PACKAGE_DATA,
	install_requires=INSTALL_REQUIRES,
	setup_requires=SETUP_REQUIRES,
	cmdclass=COMMAND_CLASS,
	)