libev integration doesn't compile on Python 3.13 / Fedora 41

[avikivity]

building 'cassandra.io.libevwrapper' extension
gcc -fno-strict-overflow -Wsign-compare -DDYNAMIC_ANNOTATIONS_ENABLED=1 -DNDEBUG -fcf-protection -fexceptions -fcf-protection -fexceptions -fcf-protection -fexceptions -O3 -fPIC -I/usr/include/libev -I/usr/local/include -I/opt/local/include -I/usr/include/python3.13 -c cassandra/io/libevwrapper.c -o build/temp.linux-x86_64-cpython-313/cassandra/io/libevwrapper.o
cassandra/io/libevwrapper.c: In function ‘PyInit_libevwrapper’:
cassandra/io/libevwrapper.c:668:10: error: implicit declaration of function ‘PyEval_ThreadsInitialized’ [-Wimplicit-function-declaration]
  668 |     if (!PyEval_ThreadsInitialized()) {
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~
cassandra/io/libevwrapper.c:669:9: warning: ‘PyEval_InitThreads’ is deprecated [-Wdeprecated-declarations]
  669 |         PyEval_InitThreads();
      |         ^~~~~~~~~~~~~~~~~~
In file included from /usr/include/python3.13/Python.h:124,
                 from cassandra/io/libevwrapper.c:1:
/usr/include/python3.13/ceval.h:114:37: note: declared here
  114 | Py_DEPRECATED(3.9) PyAPI_FUNC(void) PyEval_InitThreads(void);
      |                                     ^~~~~~~~~~~~~~~~~~
command '/usr/lib64/ccache/gcc' failed with exit code 1
/home/avi/python-driver/setup.py:291: UserWarning: 

as a result, SSL doesn't work, since (IIUC) SSL depends on libev.

[fruch]

it's reported in upstream few months back
https://datastax-oss.atlassian.net/browse/PYTHON-1401

the sad thing it's quietly fails, and no of the unit tests or integration test in this repo catches this issue

[avikivity]

Still broken:

building 'cassandra.io.libevwrapper' extension
gcc -fno-strict-overflow -Wsign-compare -DDYNAMIC_ANNOTATIONS_ENABLED=1 -DNDEBUG -fcf-protection -fexceptions -fcf-protection -fexceptions -fcf-protection -fexceptions -O3 -fPIC -I/usr/include/libev -I/usr/local/include -I/opt/local/include -I/usr/include/python3.13 -c cassandra/io/libevwrapper.c -o build/temp.linux-x86_64-cpython-313/cassandra/io/libevwrapper.o
cassandra/io/libevwrapper.c: In function ‘PyInit_libevwrapper’:
cassandra/io/libevwrapper.c:670:10: error: implicit declaration of function ‘PyEval_ThreadsInitialized’ [-Wimplicit-function-declaration]
  670 |     if (!PyEval_ThreadsInitialized()) {
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~
cassandra/io/libevwrapper.c:671:9: warning: ‘PyEval_InitThreads’ is deprecated [-Wdeprecated-declarations]
  671 |         PyEval_InitThreads();
      |         ^~~~~~~~~~~~~~~~~~
In file included from /usr/include/python3.13/Python.h:124,
                 from cassandra/io/libevwrapper.c:3:
/usr/include/python3.13/ceval.h:114:37: note: declared here
  114 | Py_DEPRECATED(3.9) PyAPI_FUNC(void) PyEval_InitThreads(void);
      |                                     ^~~~~~~~~~~~~~~~~~
command '/usr/lib64/ccache/gcc' failed with exit code 1
/home/avi/python-driver/setup.py:304: UserWarning: 

[fruch]

we introduced the fix, but we need first to release a version with it.

if you install it from code directly, like this:

git clone git@github.com:scylladb/python-driver.git
cd python-driver
pip install build
python -m build -w
pip install ./dist/scylla_driver-3.28.0-cp313-cp313-linux_x86_64.whl

and it might work

[avikivity]

I tried

python3 ./setup.py build

Is this incorrect?

[dkropachev]

I tried

python3 ./setup.py build

Is this incorrect?

On what repo? On cqlsh repo?

[avikivity]

https://github.com/scylladb/python-driver