# 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 shutil
-import sys
-import unittest
import subprocess
-import sysconfig
+import unittest
from test import support
-from test.support import os_helper
SOURCE = os.path.join(os.path.dirname(__file__), 'extension.cpp')
SETUP = os.path.join(os.path.dirname(__file__), 'setup.py')
+# With MSVC on a debug build, the linker fails with: cannot open file
+# 'python311.lib', it should look 'python311_d.lib'.
+@unittest.skipIf(support.MS_WINDOWS and support.Py_DEBUG,
+ 'test fails on Windows debug build')
+# Building and running an extension in clang sanitizing mode is not
+# straightforward
+@support.skip_if_sanitizer('test does not work with analyzing builds',
+ address=True, memory=True, ub=True, thread=True)
+# the test uses venv+pip: skip if it's not available
+@support.requires_venv_with_pip()
@support.requires_subprocess()
+@support.requires_resource('cpu')
class TestCPPExt(unittest.TestCase):
- @support.requires_resource('cpu')
- def test_build_cpp11(self):
- self.check_build(False, '_testcpp11ext')
+ def test_build(self):
+ self.check_build('_testcppext')
- @support.requires_resource('cpu')
def test_build_cpp03(self):
- self.check_build(True, '_testcpp03ext')
+ self.check_build('_testcpp03ext', std='c++03')
+
+ @unittest.skipIf(support.MS_WINDOWS, "MSVC doesn't support /std:c++11")
+ def test_build_cpp11(self):
+ self.check_build('_testcpp11ext', std='c++11')
+
+ # Only test C++14 on MSVC.
+ # On s390x RHEL7, GCC 4.8.5 doesn't support C++14.
+ @unittest.skipIf(not support.MS_WINDOWS, "need Windows")
+ def test_build_cpp14(self):
+ self.check_build('_testcpp14ext', std='c++14')
- # With MSVC, the linker fails with: cannot open file 'python311.lib'
- # https://github.com/python/cpython/pull/32175#issuecomment-1111175897
- @unittest.skipIf(support.MS_WINDOWS, 'test fails on Windows')
- # Building and running an extension in clang sanitizing mode is not
- # straightforward
- @unittest.skipIf(
- '-fsanitize' in (sysconfig.get_config_var('PY_CFLAGS') or ''),
- 'test does not work with analyzing builds')
- # the test uses venv+pip: skip if it's not available
- @support.requires_venv_with_pip()
- def check_build(self, std_cpp03, extension_name):
+ def check_build(self, extension_name, std=None):
venv_dir = 'env'
with support.setup_venv_with_pip_setuptools_wheel(venv_dir) as python_exe:
- self._check_build(std_cpp03, extension_name, python_exe)
+ self._check_build(extension_name, python_exe, std=std)
- def _check_build(self, std_cpp03, extension_name, python_exe):
+ def _check_build(self, extension_name, python_exe, std):
pkg_dir = 'pkg'
os.mkdir(pkg_dir)
shutil.copy(SETUP, os.path.join(pkg_dir, os.path.basename(SETUP)))
def run_cmd(operation, cmd):
env = os.environ.copy()
- env['CPYTHON_TEST_CPP_STD'] = 'c++03' if std_cpp03 else 'c++11'
+ if std:
+ env['CPYTHON_TEST_CPP_STD'] = std
env['CPYTHON_TEST_EXT_NAME'] = extension_name
if support.verbose:
- print('Run:', ' '.join(cmd))
+ print('Run:', ' '.join(map(shlex.quote, cmd)))
subprocess.run(cmd, check=True, env=env)
else:
proc = subprocess.run(cmd,
stderr=subprocess.STDOUT,
text=True)
if proc.returncode:
+ print('Run:', ' '.join(map(shlex.quote, cmd)))
print(proc.stdout, end='')
self.fail(
f"{operation} failed with exit code {proc.returncode}")
cmd = [python_exe, '-X', 'dev',
'-m', 'pip', 'install', '--no-build-isolation',
os.path.abspath(pkg_dir)]
+ if support.verbose:
+ cmd.append('-v')
run_cmd('Install', cmd)
# Do a reference run. Until we test that running python
#include "Python.h"
-#if __cplusplus >= 201103
-# define NAME _testcpp11ext
-#else
-# define NAME _testcpp03ext
+#ifndef MODULE_NAME
+# error "MODULE_NAME macro must be defined"
#endif
#define _STR(NAME) #NAME
};
PyType_Spec VirtualPyObject_Spec = {
- /* .name */ STR(NAME) ".VirtualPyObject",
+ /* .name */ STR(MODULE_NAME) ".VirtualPyObject",
/* .basicsize */ sizeof(VirtualPyObject),
/* .itemsize */ 0,
/* .flags */ Py_TPFLAGS_DEFAULT,
if (!result) return -1;
Py_DECREF(result);
+ // test Py_BUILD_ASSERT() and Py_BUILD_ASSERT_EXPR()
+ Py_BUILD_ASSERT(sizeof(int) == sizeof(unsigned int));
+ assert(Py_BUILD_ASSERT_EXPR(sizeof(int) == sizeof(unsigned int)) == 0);
+
return 0;
}
static struct PyModuleDef _testcppext_module = {
PyModuleDef_HEAD_INIT, // m_base
- STR(NAME), // m_name
+ STR(MODULE_NAME), // m_name
_testcppext_doc, // m_doc
0, // m_size
_testcppext_methods, // m_methods
#define FUNC_NAME(NAME) _FUNC_NAME(NAME)
PyMODINIT_FUNC
-FUNC_NAME(NAME)(void)
+FUNC_NAME(MODULE_NAME)(void)
{
return PyModuleDef_Init(&_testcppext_module);
}
# 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 platform
import shlex
-import sys
import sysconfig
from test import support
SOURCE = 'extension.cpp'
+
if not support.MS_WINDOWS:
# C++ compiler flags for GCC and clang
CPPFLAGS = [
'-Werror',
]
else:
- # Don't pass any compiler flag to MSVC
- CPPFLAGS = []
+ # MSVC compiler flags
+ CPPFLAGS = [
+ # Display warnings level 1 to 4
+ '/W4',
+ # Treat all compiler warnings as compiler errors
+ '/WX',
+ ]
def main():
cppflags = list(CPPFLAGS)
- std = os.environ["CPYTHON_TEST_CPP_STD"]
- name = os.environ["CPYTHON_TEST_EXT_NAME"]
+ std = os.environ.get("CPYTHON_TEST_CPP_STD", "")
+ module_name = os.environ["CPYTHON_TEST_EXT_NAME"]
- cppflags = [*CPPFLAGS, f'-std={std}']
+ cppflags = list(CPPFLAGS)
+ cppflags.append(f'-DMODULE_NAME={module_name}')
+
+ # Add -std=STD or /std:STD (MSVC) compiler flag
+ if std:
+ if support.MS_WINDOWS:
+ cppflags.append(f'/std:{std}')
+ else:
+ cppflags.append(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:
+ if support.MS_WINDOWS:
+ std_prefix = '/std'
+ else:
+ std_prefix = '-std'
cmd = shlex.split(cmd)
- cmd = [arg for arg in cmd if not arg.startswith('-std=')]
+ cmd = [arg for arg in cmd if not arg.startswith(std_prefix)]
cmd = shlex.join(cmd)
# CC env var overrides sysconfig CC variable in setuptools
os.environ['CC'] = cmd
- cpp_ext = Extension(
- name,
+ # On Windows, add PCbuild\amd64\ to include and library directories
+ include_dirs = []
+ library_dirs = []
+ if support.MS_WINDOWS:
+ srcdir = sysconfig.get_config_var('srcdir')
+ machine = platform.uname().machine
+ pcbuild = os.path.join(srcdir, 'PCbuild', machine)
+ if os.path.exists(pcbuild):
+ # pyconfig.h is generated in PCbuild\amd64\
+ include_dirs.append(pcbuild)
+ # python313.lib is generated in PCbuild\amd64\
+ library_dirs.append(pcbuild)
+ print(f"Add PCbuild directory: {pcbuild}")
+
+ # Display information to help debugging
+ for env_name in ('CC', 'CFLAGS', 'CPPFLAGS'):
+ if env_name in os.environ:
+ print(f"{env_name} env var: {os.environ[env_name]!r}")
+ else:
+ print(f"{env_name} env var: <missing>")
+ print(f"extra_compile_args: {cppflags!r}")
+
+ ext = Extension(
+ module_name,
sources=[SOURCE],
language='c++',
- extra_compile_args=cppflags)
- setup(name='internal' + name, version='0.0', ext_modules=[cpp_ext])
+ extra_compile_args=cppflags,
+ include_dirs=include_dirs,
+ library_dirs=library_dirs)
+ setup(name=f'internal_{module_name}',
+ version='0.0',
+ ext_modules=[ext])
if __name__ == "__main__":
projects / thirdparty / Python / cpython.git / commitdiff
