fix for pypy3.9-v7.3.11

[logicsys]

Python 3.9.16 (feeb267ead3e6771d3f2f49b83e1894839f64fb7, Dec 29 2022, 14:23:21)
PyPy 7.3.11 with GCC 10.2.1 20210130 (Red Hat 10.2.1-11)

Tests run fine on pypy 7.3.11 with those 2 changes

Ran 24 tests in 0.154s

OK

Python 2.7 (release build): 11 C tests succeeded!
Ignore missing Python executable: python3.4
Ignore missing Python executable: python3.5
Ignore missing Python executable: python3.6
Ignore missing Python executable: python3.7
Ignore missing Python executable: python3.8
CPython 3.9 (release build): 11 C tests succeeded!
CPython 3.9 (release build): 11 C++03 tests succeeded!
CPython 3.9 (release build): 11 C++11 tests succeeded!
Ignore missing Python executable: python3.10
Ignore missing Python executable: python3.11
Ignore missing Python executable: python3.12
Ignore missing Python executable: python3-debug
Ignore missing Python executable: pypy
Ignore missing Python executable: pypy2
Ignore missing Python executable: pypy2.7
Ignore missing Python executable: pypy3
Ignore missing Python executable: pypy3.6
Ignore missing Python executable: pypy3.7
Ignore missing Python executable: pypy3.8
Ignore missing Python executable: pypy3.9
PyPy 3.9 (release build): 8 C tests succeeded!
PyPy 3.9 (release build): 8 C++03 tests succeeded!
PyPy 3.9 (release build): 8 C++11 tests succeeded!

Tested: 3 Python executables

[vstinner]

Currently, when I run pypy3.9 runtests.py --current locally, it fails with:

building 'test_pythoncapi_compat_cext' extension
creating build
creating build/temp.linux-x86_64-3.9
gcc -pthread -DNDEBUG -O2 -fPIC -I/usr/include/pypy3.9 -c test_pythoncapi_compat_cext.c -o build/temp.linux-x86_64-3.9/test_pythoncapi_compat_cext.o -I/home/vstinner/python/pythoncapi-compat -Werror -Wall -Wextra -Wconversion -Wno-typedef-redefinition -std=c99
In file included from /usr/include/pypy3.9/Python.h:123,
                 from /home/vstinner/python/pythoncapi-compat/pythoncapi_compat.h:21,
                 from test_pythoncapi_compat_cext.c:4:
/usr/include/pypy3.9/pypy_decl.h:648:29: error: static declaration of 'PyPyObject_CallNoArgs' follows non-static declaration
  648 | #define PyObject_CallNoArgs PyPyObject_CallNoArgs
      |                             ^~~~~~~~~~~~~~~~~~~~~
/home/vstinner/python/pythoncapi-compat/pythoncapi_compat.h:395:1: note: in expansion of macro 'PyObject_CallNoArgs'
  395 | PyObject_CallNoArgs(PyObject *func)
      | ^~~~~~~~~~~~~~~~~~~
/usr/include/pypy3.9/pypy_decl.h:648:29: note: previous declaration of 'PyPyObject_CallNoArgs' with type 'struct _object *(struct _object *)'
  648 | #define PyObject_CallNoArgs PyPyObject_CallNoArgs
      |                             ^~~~~~~~~~~~~~~~~~~~~
/usr/include/pypy3.9/pypy_decl.h:649:30: note: in expansion of macro 'PyObject_CallNoArgs'
  649 | PyAPI_FUNC(struct _object *) PyObject_CallNoArgs(struct _object *arg0);
      |                              ^~~~~~~~~~~~~~~~~~~
/usr/include/pypy3.9/pypy_decl.h:652:29: error: static declaration of 'PyPyObject_CallOneArg' follows non-static declaration
  652 | #define PyObject_CallOneArg PyPyObject_CallOneArg
      |                             ^~~~~~~~~~~~~~~~~~~~~
/home/vstinner/python/pythoncapi-compat/pythoncapi_compat.h:406:1: note: in expansion of macro 'PyObject_CallOneArg'
  406 | PyObject_CallOneArg(PyObject *func, PyObject *arg)
      | ^~~~~~~~~~~~~~~~~~~
/usr/include/pypy3.9/pypy_decl.h:652:29: note: previous declaration of 'PyPyObject_CallOneArg' with type 'struct _object *(struct _object *, struct _object *)'
  652 | #define PyObject_CallOneArg PyPyObject_CallOneArg
      |                             ^~~~~~~~~~~~~~~~~~~~~
/usr/include/pypy3.9/pypy_decl.h:653:30: note: in expansion of macro 'PyObject_CallOneArg'
  653 | PyAPI_FUNC(struct _object *) PyObject_CallOneArg(struct _object *arg0, struct _object *arg1);
      |                              ^~~~~~~~~~~~~~~~~~~
cc1: note: unrecognized command-line option '-Wno-typedef-redefinition' may have been intended to silence earlier diagnostics
error: command '/usr/bin/gcc' failed with exit code 1

But 7 months ago, the pypy3.9 job completed successfully: https://github.com/python/pythoncapi-compat/actions/runs/3557936154 on commit 3779f12. Did PyPy 3.9 added PyObject_CallNoArgs() and PyObject_CallOneArg() recently?

[logicsys]

Yeah they were added in 3.9-v7.3.11 and were not present in 3.9-v7.3.10

[logicsys]

Of course if the older pypy versions are failing with this change, we'll need to have it only take effect for pypy3.9-v7.3.11..
Will have a go later today

[logicsys]

Hmm this PR works for me on both 3.9-v7.3.11 & 3.9-v7.3.10..

[vstinner]

The 3.12-dev CI was broken, I just fixed it: commit 513acb3. Please rebase your PR on top of it.

[vstinner]

Yeah they were added in 3.9-v7.3.11 and were not present in 3.9-v7.3.10

Hum, that's annoying. Since it's implemented as a macro in PyPy, what do you think of checking if the macro is already defined or not, rather than checking for PyPy? #if !defined(PyObject_CallNoArgs) && ... existing check ....

[logicsys]

yeah that sounds like a better approach, will try now

[vstinner]

Would you mind to mention the PyPy version which added support for these functions, here and the same comment below?

[logicsys]

no problem, I should have known better than to make changes without commenting them ha

pushed it up there

[vstinner]

It's kind of sad that PyPy updates requires fixing pythoncapi_compat.h, but so far, I failed to find a "future proof" approach to support PyPy.

[vstinner]

I merged your PR, thanks.