Cython failure with Cython 3.0.0b2

[mgorny]

When using Cython 3.0.0b2 (we're doing early testing to make sure everything works for 3.0.0 release), llfuse fails with the following error:

running build_cython
Compiling /tmp/portage/dev-python/llfuse-1.4.3/work/llfuse-1.4.3/src/llfuse.pyx

Error compiling Cython file:
------------------------------------------------------------
...
            wd[i].bufsize = bufsize
            wd[i].buf = calloc_or_raise(1, bufsize)

            # Ensure that signals get delivered to main thread
            pthread_sigmask(SIG_BLOCK, &newset, &oldset)
            res = pthread_create(&wd[i].thread_id, NULL, &worker_start, wd+i)
                                                         ^
------------------------------------------------------------

src/fuse_api.pxi:439:57: Cannot assign type 'void *(*)(void *) except * nogil' to 'void *(*)(void *) noexcept nogil'
/tmp/portage/dev-python/llfuse-1.4.3/work/llfuse-1.4.3/setup.py:226: DeprecationWarning: distutils Version classes are deprecated. Use packaging.version instead.
  if not hit or LooseVersion(hit.group(1)) < "0.29":
Cython compilation failed

(you can install it via pip install Cython==3.0.0b2)

[ThomasWaldmann]

cython/cython#5305 (comment)

> Cannot assign type 'XXX (YYY) except * nogil' to 'XXX (YYY) noexcept (20 affected projects)
> Cannot assign type 'XXX (YYY) except? -1 nogil' to 'ZZZ *' (14 affected projects)

This is a fairly large deliberately breaking change.
They likely need to add noexcept to some cdef function definitions.