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# gh-91321: Build a basic C++ test extension to check that the Python C API is
# compatible with C++ and does not emit C++ compiler warnings.
import os.path
import shlex
import sys
import sysconfig
from test import support
from setuptools import setup, Extension
SOURCE = os.path.join(os.path.dirname(__file__), 'extension.cpp')
if not support.MS_WINDOWS:
# C++ compiler flags for GCC and clang
CPPFLAGS = [
# gh-91321: The purpose of _testcppext extension is to check that building
# a C++ extension using the Python C API does not emit C++ compiler
# warnings
'-Werror',
]
else:
# Don't pass any compiler flag to MSVC
CPPFLAGS = []
def main():
cppflags = list(CPPFLAGS)
if '-std=c++03' in sys.argv:
sys.argv.remove('-std=c++03')
std = 'c++03'
name = '_testcpp03ext'
else:
# Python currently targets C++11
std = 'c++11'
name = '_testcpp11ext'
cppflags = [*CPPFLAGS, f'-std={std}']
# gh-105776: When "gcc -std=11" is used as the C++ compiler, -std=c11
# option emits a C++ compiler warning. Remove "-std11" option from the
# CC command.
cmd = (sysconfig.get_config_var('CC') or '')
if cmd is not None:
cmd = shlex.split(cmd)
cmd = [arg for arg in cmd if not arg.startswith('-std=')]
cmd = shlex.join(cmd)
# CC env var overrides sysconfig CC variable in setuptools
os.environ['CC'] = cmd
cpp_ext = Extension(
name,
sources=[SOURCE],
language='c++',
extra_compile_args=cppflags)
setup(name='internal' + name, version='0.0', ext_modules=[cpp_ext])
if __name__ == "__main__":
main()