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diff --git a/tools/distrib/python/grpcio_tools/setup.py b/tools/distrib/python/grpcio_tools/setup.py
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+++ b/tools/distrib/python/grpcio_tools/setup.py
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+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+from distutils import extension
+import os
+import os.path
+import shlex
+import sys
+
+import setuptools
+from setuptools.command import build_ext
+
+# TODO(atash) add flag to disable Cython use
+
+os.chdir(os.path.dirname(os.path.abspath(__file__)))
+sys.path.insert(0, os.path.abspath('.'))
+
+# 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.
+# By default we assume a GCC-like compiler.
+EXTRA_COMPILE_ARGS = shlex.split(os.environ.get('GRPC_PYTHON_CFLAGS',
+                                                '-frtti -std=c++11'))
+EXTRA_LINK_ARGS = shlex.split(os.environ.get('GRPC_PYTHON_LDFLAGS',
+                                             '-lpthread'))
+
+import protoc_lib_deps
+import grpc_version
+
+def protoc_ext_module():
+  plugin_sources = [
+      'grpc/tools/main.cc',
+      'grpc_root/src/compiler/python_generator.cc'] + [
+      os.path.join('third_party/protobuf/src', cc_file)
+      for cc_file in protoc_lib_deps.CC_FILES]
+  plugin_ext = extension.Extension(
+      name='grpc.tools.protoc_compiler',
+      sources=['grpc/tools/protoc_compiler.pyx'] + plugin_sources,
+      include_dirs=[
+          '.',
+          'grpc_root',
+          'grpc_root/include',
+          'third_party/protobuf/src',
+      ],
+      language='c++',
+      define_macros=[('HAVE_PTHREAD', 1)],
+      extra_compile_args=EXTRA_COMPILE_ARGS,
+      extra_link_args=EXTRA_LINK_ARGS,
+  )
+  return plugin_ext
+
+def maybe_cythonize(exts):
+  from Cython import Build
+  return Build.cythonize(exts)
+
+setuptools.setup(
+  name='grpcio_tools',
+  version=grpc_version.VERSION,
+  license='3-clause BSD',
+  ext_modules=maybe_cythonize([
+      protoc_ext_module(),
+  ]),
+  packages=setuptools.find_packages('.'),
+  # TODO(atash): Figure out why auditwheel doesn't like namespace packages.
+  #namespace_packages=['grpc'],
+  install_requires=[
+    'protobuf>=3.0.0a3',
+  ],
+)