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d91cc9db15
Disable pedantic check for c++03 (unlimited API) Also add a check for c++03 *limited* API, which passes in pedantic mode after removing a comma in the `PySendResult` declaration, and allowing `long long`.
119 lines
3.7 KiB
Python
119 lines
3.7 KiB
Python
# gh-91321: Build a basic C++ test extension to check that the Python C API is
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# compatible with C++ and does not emit C++ compiler warnings.
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import os
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import platform
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import shlex
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import sysconfig
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from test import support
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from setuptools import setup, Extension
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SOURCE = 'extension.cpp'
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if not support.MS_WINDOWS:
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# C++ compiler flags for GCC and clang
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CPPFLAGS = [
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# gh-91321: The purpose of _testcppext extension is to check that building
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# a C++ extension using the Python C API does not emit C++ compiler
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# warnings
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'-Werror',
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]
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CPPFLAGS_PEDANTIC = [
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# Ask for strict(er) compliance with the standard.
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# We cannot do this for c++03 unlimited API, since several headers in
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# Include/cpython/ use commas at end of `enum` declarations, a C++11
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# feature for which GCC has no narrower option than -Wpedantic itself.
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'-pedantic-errors',
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# We also use `long long`, a C++11 feature we can enable individually.
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'-Wno-long-long',
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]
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else:
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# MSVC compiler flags
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CPPFLAGS = [
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# Display warnings level 1 to 4
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'/W4',
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# Treat all compiler warnings as compiler errors
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'/WX',
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]
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CPPFLAGS_PEDANTIC = []
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def main():
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cppflags = list(CPPFLAGS)
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std = os.environ.get("CPYTHON_TEST_CPP_STD", "")
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module_name = os.environ["CPYTHON_TEST_EXT_NAME"]
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limited = bool(os.environ.get("CPYTHON_TEST_LIMITED", ""))
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cppflags = list(CPPFLAGS)
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cppflags.append(f'-DMODULE_NAME={module_name}')
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# Add -std=STD or /std:STD (MSVC) compiler flag
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if std:
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if support.MS_WINDOWS:
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cppflags.append(f'/std:{std}')
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else:
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cppflags.append(f'-std={std}')
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if limited or (std != 'c++03'):
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# See CPPFLAGS_PEDANTIC docstring
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cppflags.extend(CPPFLAGS_PEDANTIC)
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# gh-105776: When "gcc -std=11" is used as the C++ compiler, -std=c11
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# option emits a C++ compiler warning. Remove "-std11" option from the
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# CC command.
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cmd = (sysconfig.get_config_var('CC') or '')
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if cmd is not None:
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if support.MS_WINDOWS:
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std_prefix = '/std'
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else:
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std_prefix = '-std'
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cmd = shlex.split(cmd)
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cmd = [arg for arg in cmd if not arg.startswith(std_prefix)]
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cmd = shlex.join(cmd)
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# CC env var overrides sysconfig CC variable in setuptools
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os.environ['CC'] = cmd
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# Define Py_LIMITED_API macro
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if limited:
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version = sys.hexversion
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cppflags.append(f'-DPy_LIMITED_API={version:#x}')
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# On Windows, add PCbuild\amd64\ to include and library directories
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include_dirs = []
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library_dirs = []
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if support.MS_WINDOWS:
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srcdir = sysconfig.get_config_var('srcdir')
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machine = platform.uname().machine
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pcbuild = os.path.join(srcdir, 'PCbuild', machine)
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if os.path.exists(pcbuild):
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# pyconfig.h is generated in PCbuild\amd64\
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include_dirs.append(pcbuild)
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# python313.lib is generated in PCbuild\amd64\
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library_dirs.append(pcbuild)
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print(f"Add PCbuild directory: {pcbuild}")
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# Display information to help debugging
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for env_name in ('CC', 'CFLAGS', 'CPPFLAGS'):
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if env_name in os.environ:
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print(f"{env_name} env var: {os.environ[env_name]!r}")
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else:
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print(f"{env_name} env var: <missing>")
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print(f"extra_compile_args: {cppflags!r}")
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ext = Extension(
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module_name,
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sources=[SOURCE],
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language='c++',
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extra_compile_args=cppflags,
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include_dirs=include_dirs,
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library_dirs=library_dirs)
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setup(name=f'internal_{module_name}',
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version='0.0',
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ext_modules=[ext])
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if __name__ == "__main__":
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main()
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