As part, I assume, of PR19503, that includes 91 changed files with 27,058 additions and 147 deletions the AIX buildbot is broken.

Rather than looking/finding Modules/ld_so_aix (where I expect it to be) tests are failing, ulitmately because they look/expect it to be in a new location, and with a name dependent on being debug (or not) as the bots are configured using --pydebug.

Examples:
FileNotFoundError: [Errno 2] No such file or directory: '/home/shager/cpython-buildarea/3.x.edelsohn-aix-ppc64/build/target/lib/python3.9/config-3.9d/ld_so_aix'

or

FileNotFoundError: [Errno 2] No such file or directory: '/home/aixtools/buildarea/3.x.aixtools-aix-power6/build/target/lib/python3.9/config-3.9d/ld_so_aix'

This is (only?) in test_peg_generator.

One traceback example:
Captured traceback
==================

Traceback (most recent call last):
  File "/home/aixtools/buildarea/3.x.aixtools-aix-power6/build/Lib/test/test_peg_generator/test_c_parser.py", line 174, in test_nasty_mutually_left_recursive
    self.check_input_strings_for_grammar(grammar, self.tmp_path, valid_cases, invalid_cases)
  File "/home/aixtools/buildarea/3.x.aixtools-aix-power6/build/Lib/test/test_peg_generator/test_c_parser.py", line 40, in check_input_strings_for_grammar
    extension = generate_parser_c_extension(grammar, Path(tmp_path))
  File "/home/aixtools/buildarea/3.x.aixtools-aix-power6/build/Tools/peg_generator/pegen/testutil.py", line 95, in generate_parser_c_extension
    extension_path = compile_c_extension(str(source), build_dir=str(path / "build"))
  File "/home/aixtools/buildarea/3.x.aixtools-aix-power6/build/Tools/peg_generator/pegen/build.py", line 73, in compile_c_extension
    cmd.run()
  File "/home/aixtools/buildarea/3.x.aixtools-aix-power6/build/Lib/distutils/command/build_ext.py", line 340, in run
    self.build_extensions()
  File "/home/aixtools/buildarea/3.x.aixtools-aix-power6/build/Lib/distutils/command/build_ext.py", line 449, in build_extensions
    self._build_extensions_serial()
  File "/home/aixtools/buildarea/3.x.aixtools-aix-power6/build/Lib/distutils/command/build_ext.py", line 474, in _build_extensions_serial
    self.build_extension(ext)
  File "/home/aixtools/buildarea/3.x.aixtools-aix-power6/build/Lib/distutils/command/build_ext.py", line 551, in build_extension
    self.compiler.link_shared_object(
  File "/home/aixtools/buildarea/3.x.aixtools-aix-power6/build/Lib/distutils/ccompiler.py", line 713, in link_shared_object
    self.link(CCompiler.SHARED_OBJECT, objects,
  File "/home/aixtools/buildarea/3.x.aixtools-aix-power6/build/Lib/distutils/unixccompiler.py", line 204, in link
    self.spawn(linker + ld_args)
  File "/home/aixtools/buildarea/3.x.aixtools-aix-power6/build/Lib/distutils/ccompiler.py", line 910, in spawn
    spawn(cmd, dry_run=self.dry_run)
  File "/home/aixtools/buildarea/3.x.aixtools-aix-power6/build/Lib/distutils/spawn.py", line 74, in spawn
    proc = subprocess.Popen(cmd, env=env)
  File "/home/aixtools/buildarea/3.x.aixtools-aix-power6/build/Lib/subprocess.py", line 947, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/home/aixtools/buildarea/3.x.aixtools-aix-power6/build/Lib/subprocess.py", line 1819, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: '/home/aixtools/buildarea/3.x.aixtools-aix-power6/build/target/lib/python3.9/config-3.9d/ld_so_aix'

See https://buildbot.python.org/all/#builders/119/builds/720 and https://buildbot.python.org/all/#builders/227/builds/723