[BUG] migration to cython3.0.5: redefinition of '__Pyx_Enum_<enum_name>_to_py #5860
Description
Describe the bug
I'm having an issue with migrating PyVerbs package, part of the upstream rdma-core, to cython3.
We've been working for a few years with Cython 0.2X.YY versions without the below issues.
And I didn't find a solved issue for this or any relevant notes in the migration document.
<path-to-rdma-core>/rdma-core/build-fc39/pyverbs/srq.c:5528:18: error: redefinition of '__Pyx_Enum_ibv_ops_wr_opcode_to_py'
5528 | static PyObject *__Pyx_Enum_ibv_ops_wr_opcode_to_py(enum ibv_ops_wr_opcode __pyx_v_c_val) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<path-to-rdma-core>/rdma-core/build-fc39/pyverbs/srq.c:4511:18: note: previous definition of '__Pyx_Enum_ibv_ops_wr_opcode_to_py' with type 'PyObject *(enum ibv_ops_wr_opcode)' {aka 'struct _object *(enum ibv_ops_wr_opcode)'}
4511 | static PyObject *__Pyx_Enum_ibv_ops_wr_opcode_to_py(enum ibv_ops_wr_opcode __pyx_v_c_val) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[420/575] Building C object pyverbs/CMakeFiles/cq.cpython-312-x86_64-linux-gnu.dir/cq.c.o
Code to reproduce the behaviour:
Go to rdma-core project and checkout this PR branch:Update to fc39
Then, to build, and reproduce, you can do:
buildlib/cbuild build-images fc39
buildlib/cbuild make fc39
Expected behaviour
I expect the compilation to pass as it's been passing on any Cython 0.29.XY versions.
The cythonization process creates a duplicate enum definition in the C files due to the "inlucde <pxd_file_name>.pxd" lines.
OS
Linux
Python version
3.10.8
Cython version
3.0.5 (actually from any cython3 version)
Additional context
No response