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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
import shlex
import sys
import sysconfig
from test import support
from setuptools import setup, Extension
SOURCE = 'extension.c'
if not support.MS_WINDOWS:
# C compiler flags for GCC and clang
CFLAGS = [
# The purpose of test_cext extension is to check that building a C
# extension using the Python C API does not emit C compiler warnings.
'-Werror',
# gh-116869: The Python C API must build with
# -Werror=declaration-after-statement.
'-Werror=declaration-after-statement',
]
else:
# Don't pass any compiler flag to MSVC
CFLAGS = []
def main():
std = os.environ["CPYTHON_TEST_STD"]
name = os.environ["CPYTHON_TEST_EXT_NAME"]
cflags = [*CFLAGS, f'-std={std}']
# Remove existing -std options to only test ours
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
ext = Extension(
name,
sources=[SOURCE],
extra_compile_args=cflags)
setup(name='internal' + name, version='0.0', ext_modules=[ext])
if __name__ == "__main__":
main()
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