1 # Copyright 2016 gRPC authors.
3 # Licensed under the Apache License, Version 2.0 (the "License");
4 # you may not use this file except in compliance with the License.
5 # You may obtain a copy of the License at
7 # http://www.apache.org/licenses/LICENSE-2.0
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS,
11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 # See the License for the specific language governing permissions and
13 # limitations under the License.
15 from distutils import cygwinccompiler
16 from distutils import extension
17 from distutils import util
26 from subprocess import PIPE
32 from setuptools.command import build_ext
34 # TODO(atash) add flag to disable Cython use
36 _PACKAGE_PATH = os.path.realpath(os.path.dirname(__file__))
37 _README_PATH = os.path.join(_PACKAGE_PATH, 'README.rst')
39 os.chdir(os.path.dirname(os.path.abspath(__file__)))
40 sys.path.insert(0, os.path.abspath('.'))
42 import _parallel_compile_patch
43 import protoc_lib_deps
47 _EXT_INIT_SYMBOL = None
48 if sys.version_info[0] == 2:
49 _EXT_INIT_SYMBOL = "init_protoc_compiler"
51 _EXT_INIT_SYMBOL = "PyInit__protoc_compiler"
53 _parallel_compile_patch.monkeypatch_compile_maybe()
56 'Development Status :: 5 - Production/Stable',
57 'Programming Language :: Python',
58 'Programming Language :: Python :: 3',
59 'License :: OSI Approved :: Apache Software License',
62 PY3 = sys.version_info.major == 3
65 def _env_bool_value(env_name, default):
66 """Parses a bool option from an environment variable"""
67 return os.environ.get(env_name, default).upper() not in ['FALSE', '0', '']
70 # Environment variable to determine whether or not the Cython extension should
71 # *use* Cython or use the generated C files. Note that this requires the C files
72 # to have been generated by building first *with* Cython support.
73 BUILD_WITH_CYTHON = _env_bool_value('GRPC_PYTHON_BUILD_WITH_CYTHON', 'False')
75 # Export this variable to force building the python extension with a statically linked libstdc++.
76 # At least on linux, this is normally not needed as we can build manylinux-compatible wheels on linux just fine
77 # without statically linking libstdc++ (which leads to a slight increase in the wheel size).
78 # This option is useful when crosscompiling wheels for aarch64 where
79 # it's difficult to ensure that the crosscompilation toolchain has a high-enough version
80 # of GCC (we require >4.9) but still uses old-enough libstdc++ symbols.
81 # TODO(jtattermusch): remove this workaround once issues with crosscompiler version are resolved.
82 BUILD_WITH_STATIC_LIBSTDCXX = _env_bool_value(
83 'GRPC_PYTHON_BUILD_WITH_STATIC_LIBSTDCXX', 'False')
86 def check_linker_need_libatomic():
87 """Test if linker on system needs libatomic."""
88 code_test = (b'#include <atomic>\n' +
89 b'int main() { return std::atomic<int64_t>{}; }')
90 cxx = os.environ.get('CXX', 'c++')
91 cpp_test = subprocess.Popen([cxx, '-x', 'c++', '-std=c++11', '-'],
95 cpp_test.communicate(input=code_test)
96 if cpp_test.returncode == 0:
98 # Double-check to see if -latomic actually can solve the problem.
99 # https://github.com/grpc/grpc/issues/22491
100 cpp_test = subprocess.Popen(
101 [cxx, '-x', 'c++', '-std=c++11', '-latomic', '-'],
105 cpp_test.communicate(input=code_test)
106 return cpp_test.returncode == 0
109 class BuildExt(build_ext.build_ext):
110 """Custom build_ext command."""
112 def get_ext_filename(self, ext_name):
113 # since python3.5, python extensions' shared libraries use a suffix that corresponds to the value
114 # of sysconfig.get_config_var('EXT_SUFFIX') and contains info about the architecture the library targets.
115 # E.g. on x64 linux the suffix is ".cpython-XYZ-x86_64-linux-gnu.so"
116 # When crosscompiling python wheels, we need to be able to override this suffix
117 # so that the resulting file name matches the target architecture and we end up with a well-formed
119 filename = build_ext.build_ext.get_ext_filename(self, ext_name)
120 orig_ext_suffix = sysconfig.get_config_var('EXT_SUFFIX')
121 new_ext_suffix = os.getenv('GRPC_PYTHON_OVERRIDE_EXT_SUFFIX')
122 if new_ext_suffix and filename.endswith(orig_ext_suffix):
123 filename = filename[:-len(orig_ext_suffix)] + new_ext_suffix
127 # There are some situations (like on Windows) where CC, CFLAGS, and LDFLAGS are
128 # entirely ignored/dropped/forgotten by distutils and its Cygwin/MinGW support.
129 # We use these environment variables to thus get around that without locking
130 # ourselves in w.r.t. the multitude of operating systems this ought to build on.
131 # We can also use these variables as a way to inject environment-specific
132 # compiler/linker flags. We assume GCC-like compilers and/or MinGW as a
133 # reasonable default.
134 EXTRA_ENV_COMPILE_ARGS = os.environ.get('GRPC_PYTHON_CFLAGS', None)
135 EXTRA_ENV_LINK_ARGS = os.environ.get('GRPC_PYTHON_LDFLAGS', None)
136 if EXTRA_ENV_COMPILE_ARGS is None:
137 EXTRA_ENV_COMPILE_ARGS = '-std=c++11'
138 if 'win32' in sys.platform:
139 if sys.version_info < (3, 5):
140 # We use define flags here and don't directly add to DEFINE_MACROS below to
141 # ensure that the expert user/builder has a way of turning it off (via the
142 # envvars) without adding yet more GRPC-specific envvars.
143 # See https://sourceforge.net/p/mingw-w64/bugs/363/
144 if '32' in platform.architecture()[0]:
145 EXTRA_ENV_COMPILE_ARGS += ' -D_ftime=_ftime32 -D_timeb=__timeb32 -D_ftime_s=_ftime32_s -D_hypot=hypot'
147 EXTRA_ENV_COMPILE_ARGS += ' -D_ftime=_ftime64 -D_timeb=__timeb64 -D_hypot=hypot'
149 # We need to statically link the C++ Runtime, only the C runtime is
150 # available dynamically
151 EXTRA_ENV_COMPILE_ARGS += ' /MT'
152 elif "linux" in sys.platform or "darwin" in sys.platform:
153 EXTRA_ENV_COMPILE_ARGS += ' -fno-wrapv -frtti'
154 if EXTRA_ENV_LINK_ARGS is None:
155 EXTRA_ENV_LINK_ARGS = ''
156 # NOTE(rbellevi): Clang on Mac OS will make all static symbols (both
157 # variables and objects) global weak symbols. When a process loads the
158 # protobuf wheel's shared object library before loading *this* C extension,
159 # the runtime linker will prefer the protobuf module's version of symbols.
160 # This results in the process using a mixture of symbols from the protobuf
161 # wheel and this wheel, which may be using different versions of
162 # libprotobuf. In the case that they *are* using different versions of
163 # libprotobuf *and* there has been a change in data layout (or in other
164 # invariants) segfaults, data corruption, or "bad things" may happen.
166 # This flag ensures that on Mac, the only global symbol is the one loaded by
167 # the Python interpreter. The problematic global weak symbols become local
168 # weak symbols. This is not required on Linux since the compiler does not
169 # produce global weak symbols. This is not required on Windows as our ".pyd"
170 # file does not contain any symbols.
172 # Finally, the leading underscore here is part of the Mach-O ABI. Unlike
173 # more modern ABIs (ELF et al.), Mach-O prepends an underscore to the names
175 if "darwin" in sys.platform:
176 EXTRA_ENV_LINK_ARGS += ' -Wl,-exported_symbol,_{}'.format(
178 if "linux" in sys.platform or "darwin" in sys.platform:
179 EXTRA_ENV_LINK_ARGS += ' -lpthread'
180 if check_linker_need_libatomic():
181 EXTRA_ENV_LINK_ARGS += ' -latomic'
182 elif "win32" in sys.platform and sys.version_info < (3, 5):
183 msvcr = cygwinccompiler.get_msvcr()[0]
184 EXTRA_ENV_LINK_ARGS += (
185 ' -static-libgcc -static-libstdc++ -mcrtdll={msvcr}'
186 ' -static -lshlwapi'.format(msvcr=msvcr))
188 EXTRA_COMPILE_ARGS = shlex.split(EXTRA_ENV_COMPILE_ARGS)
189 EXTRA_LINK_ARGS = shlex.split(EXTRA_ENV_LINK_ARGS)
191 if BUILD_WITH_STATIC_LIBSTDCXX:
192 EXTRA_LINK_ARGS.append('-static-libstdc++')
194 CC_FILES = [os.path.normpath(cc_file) for cc_file in protoc_lib_deps.CC_FILES]
196 os.path.normpath(proto_file) for proto_file in protoc_lib_deps.PROTO_FILES
198 CC_INCLUDE = os.path.normpath(protoc_lib_deps.CC_INCLUDE)
199 PROTO_INCLUDE = os.path.normpath(protoc_lib_deps.PROTO_INCLUDE)
201 GRPC_PYTHON_TOOLS_PACKAGE = 'grpc_tools'
202 GRPC_PYTHON_PROTO_RESOURCES_NAME = '_proto'
205 if "win32" in sys.platform:
206 DEFINE_MACROS += (('WIN32_LEAN_AND_MEAN', 1),)
207 if '64bit' in platform.architecture()[0]:
208 DEFINE_MACROS += (('MS_WIN64', 1),)
209 elif "linux" in sys.platform or "darwin" in sys.platform:
210 DEFINE_MACROS += (('HAVE_PTHREAD', 1),)
212 # By default, Python3 distutils enforces compatibility of
213 # c plugins (.so files) with the OSX version Python was built with.
214 # We need OSX 10.10, the oldest which supports C++ thread_local.
215 if 'darwin' in sys.platform:
216 mac_target = sysconfig.get_config_var('MACOSX_DEPLOYMENT_TARGET')
217 if mac_target and (pkg_resources.parse_version(mac_target) <
218 pkg_resources.parse_version('10.10.0')):
219 os.environ['MACOSX_DEPLOYMENT_TARGET'] = '10.10'
220 os.environ['_PYTHON_HOST_PLATFORM'] = re.sub(
221 r'macosx-[0-9]+\.[0-9]+-(.+)', r'macosx-10.10-\1',
226 tools_path = GRPC_PYTHON_TOOLS_PACKAGE.replace('.', os.path.sep)
227 proto_resources_path = os.path.join(tools_path,
228 GRPC_PYTHON_PROTO_RESOURCES_NAME)
230 for proto_file in PROTO_FILES:
231 source = os.path.join(PROTO_INCLUDE, proto_file)
232 target = os.path.join(proto_resources_path, proto_file)
233 relative_target = os.path.join(GRPC_PYTHON_PROTO_RESOURCES_NAME,
236 os.makedirs(os.path.dirname(target))
237 except OSError as error:
238 if error.errno == errno.EEXIST:
242 shutil.copy(source, target)
243 proto_files.append(relative_target)
244 return {GRPC_PYTHON_TOOLS_PACKAGE: proto_files}
247 def extension_modules():
248 if BUILD_WITH_CYTHON:
249 plugin_sources = [os.path.join('grpc_tools', '_protoc_compiler.pyx')]
251 plugin_sources = [os.path.join('grpc_tools', '_protoc_compiler.cpp')]
254 os.path.join('grpc_tools', 'main.cc'),
255 os.path.join('grpc_root', 'src', 'compiler', 'python_generator.cc')
256 ] + [os.path.join(CC_INCLUDE, cc_file) for cc_file in CC_FILES]
258 plugin_ext = extension.Extension(
259 name='grpc_tools._protoc_compiler',
260 sources=plugin_sources,
264 os.path.join('grpc_root', 'include'),
268 define_macros=list(DEFINE_MACROS),
269 extra_compile_args=list(EXTRA_COMPILE_ARGS),
270 extra_link_args=list(EXTRA_LINK_ARGS),
272 extensions = [plugin_ext]
273 if BUILD_WITH_CYTHON:
274 from Cython import Build
275 return Build.cythonize(extensions)
280 setuptools.setup(name='grpcio-tools',
281 version=grpc_version.VERSION,
282 description='Protobuf code generator for gRPC',
283 long_description=open(_README_PATH, 'r').read(),
284 author='The gRPC Authors',
285 author_email='grpc-io@googlegroups.com',
286 url='https://grpc.io',
287 license='Apache License 2.0',
288 classifiers=CLASSIFIERS,
289 ext_modules=extension_modules(),
290 packages=setuptools.find_packages('.'),
292 'protobuf>=3.5.0.post1, < 4.0dev',
293 'grpcio>={version}'.format(version=grpc_version.VERSION),
296 package_data=package_data(),
298 'build_ext': BuildExt,