CPython 3.11 fails under WASI SDK 21

[brettcannon]

Bug report

Bug description:

https://buildbot.python.org/all/#/builders/1370/builds/146/steps/11/logs/stdio

======================================================================
ERROR: test_issue16421_multiple_modules_in_one_dll (test.test_imp.ImportTests.test_issue16421_multiple_modules_in_one_dll)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Lib/test/test_imp.py", line 249, in test_issue16421_multiple_modules_in_one_dll
    fileobj, pathname, description = imp.find_module(m)
                                     ^^^^^^^^^^^^^^^^^^
  File "/Lib/imp.py", line 297, in find_module
    raise ImportError(_ERR_MSG.format(name), name=name)
ImportError: No module named '_testimportmultiple'
======================================================================
ERROR: test_issue24748_load_module_skips_sys_modules_check (test.test_imp.ImportTests.test_issue24748_load_module_skips_sys_modules_check)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Lib/test/test_imp.py", line 295, in test_issue24748_load_module_skips_sys_modules_check
    module = imp.load_dynamic(name, spec.origin)
                                    ^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'origin'
======================================================================
ERROR: test_load_module_extension_file_is_None (test.test_imp.ImportTests.test_load_module_extension_file_is_None)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Lib/test/test_imp.py", line 278, in test_load_module_extension_file_is_None
    found = imp.find_module(name)
            ^^^^^^^^^^^^^^^^^^^^^
  File "/Lib/imp.py", line 297, in find_module
    raise ImportError(_ERR_MSG.format(name), name=name)
ImportError: No module named '_testimportmultiple'
----------------------------------------------------------------------
Ran 29 tests in 0.131s
FAILED (errors=3, skipped=2)
test test_imp failed

CPython versions tested on:

3.11

Operating systems tested on:

Other

Linked PRs

• [3.11] gh-116831: Fixes tests for c extension in WASI for Python 3.11 (GH-116831) #116933

[brettcannon]

If the decision is made not to fix this, then the buildbot config should be updated to select the appropriate WASI SDK version when building CPython 3.11 (or bite the bullet and define builders based on the WASI SDK version).

[brettcannon]

Simplest solution may be to just skip those tests under WASI that involve extension modules. Can do that by updating requires_load_dynamic():

cpython/Lib/test/test_imp.py

Lines 22 to 27 in d83b4c5

	def requires_load_dynamic(meth):
	"""Decorator to skip a test if not running under CPython or lacking
	imp.load_dynamic()."""
	meth = support.cpython_only(meth)
	return unittest.skipIf(getattr(imp, 'load_dynamic', None) is None,
	'imp.load_dynamic() required')(meth)

[bedevere-app]

GH-116933 is a backport of this pull request to the 3.11 branch.

[brettcannon]

And now everything passes under WASI SDK 21 on Python 3.11! https://buildbot.python.org/all/#/builders/1370/builds/155

Thanks, @kushaldas !