gh-141563: Enable test_cppext internal C API tests on macOS

[vstinner]

Build the C API in C++11 mode on macOS.

• Issue: The datetime C API is not thread-safe #141563

[vstinner]

!buildbot x86-64 MacOS Intel NoGIL

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @vstinner for commit 15ab9d4 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F144711%2Fmerge

The command will test the builders whose names match following regular expression: x86-64 MacOS Intel NoGIL

The builders matched are:

• x86-64 MacOS Intel NoGIL PR

[vstinner]

It doesn't work, there are many C++ compiler warnings. But I didn't expect -pedantic-errors in C++ compiler flags.

  clang++ -fno-strict-overflow -Wsign-compare -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -g -Og -Wall -I/Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/build/test_python_11425æ/tempcwd/env/include -I/Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include -I/Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build -c extension.cpp -o build/temp.macosx-13.7-x86_64-cpython-315t-pydebug/extension.o -Werror -DMODULE_NAME=_testcppext_internal -std=c++11 -pedantic-errors -Wno-long-long -DTEST_INTERNAL_C_API=1

  In file included from extension.cpp:21:
  In file included from /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_backoff.h:15:
  In file included from /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_interp_structs.h:15:
  In file included from /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_tstate.h:15:
  /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_qsbr.h:75:20: error: zero size arrays are an extension [-Werror,-Wzero-length-array]
      char __padding[64 - sizeof(struct _qsbr_thread_state)];
                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  In file included from extension.cpp:21:
  In file included from /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_backoff.h:15:
  In file included from /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_interp_structs.h:15:
  In file included from /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_tstate.h:16:
  /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_uop.h:26:9: error: anonymous structs are a GNU extension [-Werror,-Wgnu-anonymous-struct]
          struct {
          ^
  /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_uop.h:26:9: error: anonymous types declared in an anonymous union are an extension [-Werror,-Wnested-anon-types]
  In file included from extension.cpp:21:
  /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_backoff.h:65:13: error: compound literals are a C99-specific feature [-Werror,-Wc99-extensions]
      return ((_Py_BackoffCounter){
              ^
  /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_backoff.h:83:13: error: compound literals are a C99-specific feature [-Werror,-Wc99-extensions]
      return ((_Py_BackoffCounter){
              ^
  In file included from extension.cpp:22:
  In file included from /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_cell.h:5:
  In file included from /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_object.h:15:
  In file included from /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_runtime.h:11:
  In file included from /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_runtime_structs.h:62:
  /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_tracemalloc.h:63:30: error: flexible array members are a C99 feature [-Werror,-Wc99-extensions]
      struct tracemalloc_frame frames[];
                               ^
  In file included from extension.cpp:22:
  In file included from /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_cell.h:6:
  /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_stackref.h:388:12: error: compound literals are a C99-specific feature [-Werror,-Wc99-extensions]
      return (_PyStackRef){ .bits = ((uintptr_t)ptr) | Py_TAG_INVALID };
             ^
  /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_stackref.h:435:12: error: compound literals are a C99-specific feature [-Werror,-Wc99-extensions]
      return (_PyStackRef){ .bits = ((((uintptr_t)i) << Py_TAGGED_SHIFT) | Py_INT_TAG) };
             ^
  /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_stackref.h:452:12: error: compound literals are a C99-specific feature [-Werror,-Wc99-extensions]
      return (_PyStackRef){ .bits = ref.bits + (1 << Py_TAGGED_SHIFT) };
             ^
  /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_stackref.h:534:12: error: compound literals are a C99-specific feature [-Werror,-Wc99-extensions]
      return (_PyStackRef){ .bits = ref.bits | Py_TAG_REFCNT };
             ^
  /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_stackref.h:556:12: error: compound literals are a C99-specific feature [-Werror,-Wc99-extensions]
      return (_PyStackRef){ .bits = (uintptr_t)obj };
             ^
  /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_stackref.h:574:23: error: compound literals are a C99-specific feature [-Werror,-Wc99-extensions]
      _PyStackRef ref = (_PyStackRef){ .bits = (uintptr_t)obj };
                        ^
  /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_stackref.h:585:16: error: compound literals are a C99-specific feature [-Werror,-Wc99-extensions]
          return (_PyStackRef){ .bits = (uintptr_t)obj | Py_TAG_REFCNT };
                 ^
  /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_stackref.h:593:23: error: compound literals are a C99-specific feature [-Werror,-Wc99-extensions]
      _PyStackRef ref = (_PyStackRef){ .bits = (uintptr_t)obj };
                        ^
  /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_stackref.h:604:23: error: compound literals are a C99-specific feature [-Werror,-Wc99-extensions]
      _PyStackRef ref = (_PyStackRef){ .bits = (uintptr_t)obj };
                        ^
  /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_stackref.h:615:12: error: compound literals are a C99-specific feature [-Werror,-Wc99-extensions]
      return (_PyStackRef){ .bits = (uintptr_t)obj | Py_TAG_REFCNT};
             ^
  /Users/buildbot/buildarea/pull_request.itamaro-macos-intel-aws.nogil/build/Include/internal/pycore_stackref.h:801:16: error: compound literals are a C99-specific feature [-Werror,-Wc99-extensions]
          *out = (_PyStackRef){ .bits = (uintptr_t)op | Py_TAG_REFCNT };
                 ^
  17 errors generated.

[vstinner]

!buildbot x86-64 MacOS Intel NoGIL

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @vstinner for commit 68ae13f 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F144711%2Fmerge

The command will test the builders whose names match following regular expression: x86-64 MacOS Intel NoGIL

The builders matched are:

• x86-64 MacOS Intel NoGIL PR

[vstinner]

Aha, it works with -std=c++11 and without -pedantic-errors: tests passed successfully on buildbot/x86-64 MacOS Intel NoGIL PR.

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @vstinner for commit 68ae13f 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F144711%2Fmerge

If you want to schedule another build, you need to add the 🔨 test-with-buildbots label again.

[ned-deily]

Aha, it works with -std=c++11 and without -pedantic-errors: tests passed successfully on buildbot/x86-64 MacOS Intel NoGIL PR.

And it passed on the test system that was failing yesterday. Thank you!