Compiling Modules/_testexternalinspection.c failing due to PTHREADS_KEYS_MAX not being defined

[brettcannon]

Bug report

Bug description:

On my local machine, I'm getting this compile error:

In file included from ../../Modules/_testexternalinspection.c:47:
In file included from ../../Include/internal/pycore_runtime.h:12:
In file included from ../../Include/internal/pycore_ceval_state.h:12:
In file included from ../../Include/internal/pycore_gil.h:11:
In file included from ../../Include/internal/pycore_condvar.h:8:
../../Include/internal/pycore_pythread.h:76:46: error: use of undeclared identifier 'PTHREAD_KEYS_MAX'
        struct py_stub_tls_entry tls_entries[PTHREAD_KEYS_MAX];
                                             ^
In file included from ../../Modules/_testexternalinspection.c:47:
In file included from ../../Include/internal/pycore_runtime.h:12:
In file included from ../../Include/internal/pycore_ceval_state.h:12:
../../Include/internal/pycore_gil.h:14:4: error: You need either a POSIX-compatible or a Windows system!
#  error You need either a POSIX-compatible or a Windows system!
   ^
../../Include/internal/pycore_gil.h:36:5: error: unknown type name 'PyCOND_T'
    PyCOND_T cond;
    ^
../../Include/internal/pycore_gil.h:37:5: error: unknown type name 'PyMUTEX_T'
    PyMUTEX_T mutex;
    ^
../../Include/internal/pycore_gil.h:41:5: error: unknown type name 'PyCOND_T'
    PyCOND_T switch_cond;
    ^
../../Include/internal/pycore_gil.h:42:5: error: unknown type name 'PyMUTEX_T'
    PyMUTEX_T switch_mutex;

CPython versions tested on:

CPython main branch

Operating systems tested on:

Other

Linked PRs

• GH-116226: include pthread_stubs.h in pycore_pythreads.h #116227

[brettcannon]

/cc @pablogsal in case he knows what's going on.

[brettcannon]

I went ahead and manually included pthread_stubs.h and that seemed to resolve the issue.

[pablogsal]

Thanks for taking care of this @brettcannon ❤️