The build output is littered with the warning The 'IF' statement is deprecated and will be removed in a future Cython version. Consider using runtime conditions or C macros instead., which is from the conditional compilation based on the Sundials version used.
There does not seem to be a straight-forward alternative right now and there is no timeline for actually removing it as of now. See further: https://github.com/cython/cython/issues/4310.
Also see comment in particular, current plan is to ignore the warning and monitor the developments in Cython.
(For visibility)
The build output is littered with the warning
The 'IF' statement is deprecated and will be removed in a future Cython version. Consider using runtime conditions or C macros instead., which is from the conditional compilation based on the Sundials version used.There does not seem to be a straight-forward alternative right now and there is no timeline for actually removing it as of now. See further: https://github.com/cython/cython/issues/4310.
Also see comment in particular, current plan is to ignore the warning and monitor the developments in Cython.