GH-95952: Require setting HOSTRUNNER when cross compiling for WASI

[brettcannon]

macOS by default doesn't have the requisite CLI tools to make a default value easy. Plus Tools/wasm/wasi takes care of setting HOSTRUNNER.

• Issue: Makefile / configure.ac: realpath is not available on macOS #95952

[brettcannon]

!buildbot wasi

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @brettcannon for commit d9a7927 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F138203%2Fmerge

The command will test the builders whose names match following regular expression: wasi

The builders matched are:

• wasm32-wasi Non-Debug PR
• wasm32 WASI 8Core PR
• wasm32-wasi PR

[brettcannon]

Converting to draft while I think about what to do with the failing buildbots (they are structured for 3.11 and 3.12, so not critical for PR checks).

[brettcannon]

python/buildmaster-config#623 will turn off the non-debug PR builder. Once this lands I will convert the PR to being ready.

[brettcannon]

!buildbot wasi

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @brettcannon for commit d9a7927 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F138203%2Fmerge

The command will test the builders whose names match following regular expression: wasi

The builders matched are:

• wasm32-wasi Non-Debug PR
• wasm32 WASI 8Core PR
• wasm32-wasi PR

[brettcannon]

!buildbot wasi

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @brettcannon for commit 98d2b07 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F138203%2Fmerge

The command will test the builders whose names match following regular expression: wasi

The builders matched are:

• wasm32-wasi Non-Debug PR
• wasm32 WASI 8Core PR
• wasm32-wasi PR

[zware]

In spite of the message, only the expected one seems to have run. Likely due to my manually doing a reconfig rather than letting the regular update process do a full restart.

[brettcannon]

In spite of the message, only the expected one seems to have run

Yeah, I double-checked with a branch update and that seems to be the case.

[brettcannon]

I'll give the typical configure.ac reviewers some time to review this before merging.

[brettcannon]

It's been a week, no one spoke up, and it's early in the life of 3.15 such that if I did something wrong we can undo it easily enough.

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 Windows Server 2022 NoGIL 3.x (tier-1) has failed when building commit bde1291.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1241/builds/6594) and take a look at the build logs.
4. Check if the failure is related to this commit (bde1291) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/#/builders/1241/builds/6594

Failed tests:

• test_launcher

Failed subtests:

• tearDownClass - test.test_launcher.TestLauncher
• test_search_major_2 - test.test_launcher.TestLauncher.test_search_major_2
• test_py_handle_64_in_ini - test.test_launcher.TestLauncher.test_py_handle_64_in_ini
• test_virtualenv_with_env - test.test_launcher.TestLauncher.test_virtualenv_with_env
• test_literal_shebang_command - test.test_launcher.TestLauncher.test_literal_shebang_command
• test_py_default_short_argv0 - test.test_launcher.TestLauncher.test_py_default_short_argv0
• test_shebang_command_in_venv - test.test_launcher.TestLauncher.test_shebang_command_in_venv
• test_search_major_3 - test.test_launcher.TestLauncher.test_search_major_3

Summary of the results of the build (if available):

==

Click to see traceback logs

Traceback (most recent call last):
  File "C:\Users\Administrator\buildarea\3.x.itamaro-win64-srv-22-aws.x64.nogil\build\Lib\test\test_launcher.py", line 465, in test_search_major_2
    self.assertEqual("PythonCore", data["env.company"])
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: 'PythonCore' != 'PythonTestSuite'
- PythonCore
+ PythonTestSuite


Traceback (most recent call last):
  File "C:\Users\Administrator\buildarea\3.x.itamaro-win64-srv-22-aws.x64.nogil\build\Lib\test\test_launcher.py", line 511, in test_py_default_short_argv0
    data = self.run_py(["--version"], argv=f'{argv0} --version')
  File "C:\Users\Administrator\buildarea\3.x.itamaro-win64-srv-22-aws.x64.nogil\build\Lib\test\test_launcher.py", line 254, in run_py
    self.assertEqual(expect_returncode, p.returncode)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: 0 != 103


Traceback (most recent call last):
  File "C:\Users\Administrator\buildarea\3.x.itamaro-win64-srv-22-aws.x64.nogil\build\Lib\test\test_launcher.py", line 787, in test_shebang_command_in_venv
    data = self.run_py([script], env=env)
  File "C:\Users\Administrator\buildarea\3.x.itamaro-win64-srv-22-aws.x64.nogil\build\Lib\test\test_launcher.py", line 254, in run_py
    self.assertEqual(expect_returncode, p.returncode)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: 0 != 103


Traceback (most recent call last):
  File "C:\Users\Administrator\buildarea\3.x.itamaro-win64-srv-22-aws.x64.nogil\build\Lib\test\test_launcher.py", line 309, in tearDownClass
    delete_registry_data(key, TEST_DATA)
    ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^
  File "C:\Users\Administrator\buildarea\3.x.itamaro-win64-srv-22-aws.x64.nogil\build\Lib\test\test_launcher.py", line 129, in delete_registry_data
    with winreg.OpenKey(root, key, access=ACCESS) as hkey:
         ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [WinError 2] The system cannot find the file specified


Traceback (most recent call last):
  File "C:\Users\Administrator\buildarea\3.x.itamaro-win64-srv-22-aws.x64.nogil\build\Lib\test\test_launcher.py", line 751, in test_literal_shebang_command
    self.assertEqual(
    ~~~~~~~~~~~~~~~~^
        f"TEST_EXE.exe arg1 {quote(script)}",
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        data["stdout"].strip(),
        ^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
AssertionError: 'TEST_EXE.exe arg1 C:\\Users\\Administrato[97 chars]p.py' != 'C:\\Users\\Administrator\\buildarea\\3.x.[207 chars]p.py'
- TEST_EXE.exe arg1 C:\Users\Administrator\buildarea\3.x.itamaro-win64-srv-22-aws.x64.nogil\build\build\test_python_6840æ\tmpz5y16zmp.py
+ C:\Users\Administrator\buildarea\3.x.itamaro-win64-srv-22-aws.x64.nogil\build\build\test_python_6840æ\test-command arg1 C:\Users\Administrator\buildarea\3.x.itamaro-win64-srv-22-aws.x64.nogil\build\build\test_python_6840æ\tmpz5y16zmp.py


Traceback (most recent call last):
  File "C:\Users\Administrator\buildarea\3.x.itamaro-win64-srv-22-aws.x64.nogil\build\Lib\test\test_launcher.py", line 552, in test_virtualenv_with_env
    data2 = self.run_py(["-V:PythonTestSuite/3"], env={**env, "PY_PYTHON": "PythonTestSuite/3"})
  File "C:\Users\Administrator\buildarea\3.x.itamaro-win64-srv-22-aws.x64.nogil\build\Lib\test\test_launcher.py", line 254, in run_py
    self.assertEqual(expect_returncode, p.returncode)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: 0 != 103


Traceback (most recent call last):
  File "C:\Users\Administrator\buildarea\3.x.itamaro-win64-srv-22-aws.x64.nogil\build\Lib\test\test_launcher.py", line 445, in test_search_major_3
    self.assertEqual("PythonCore", data["env.company"])
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: 'PythonCore' != 'PythonTestSuite'
- PythonCore
+ PythonTestSuite


Traceback (most recent call last):
  File "C:\Users\Administrator\buildarea\3.x.itamaro-win64-srv-22-aws.x64.nogil\build\Lib\test\test_launcher.py", line 652, in test_py_handle_64_in_ini
    data = self.run_py([], allow_fail=True, expect_returncode=103)
  File "C:\Users\Administrator\buildarea\3.x.itamaro-win64-srv-22-aws.x64.nogil\build\Lib\test\test_launcher.py", line 252, in run_py
    raise subprocess.CalledProcessError(p.returncode, [self.py_exe, *args], out, err)
subprocess.CalledProcessError: Command '[WindowsPath('C:/Users/Administrator/buildarea/3.x.itamaro-win64-srv-22-aws.x64.nogil/build/PCbuild/amd64/py_d.exe')]' returned non-zero exit status 0.