How can a #defined C value be exposed to Python in a Cython module?

Question

I\'d like to make the integer constants (ACTIVE_TAG, etc) defined here:

//island management, m_activationState1
#define ACTIVE_TAG 1
#define ISLAND_SLEEPING          


        

Answer 1

It worked in my case. Maybe can be helpful for someone too:

In my case I needed to export a #define from a linux kernel library. And it worked for my:

# your_pxd_file.pxd
cdef extern from "sched.h": #here are lots of `#define`'s clauses. something like the link: https://github.com/spotify/linux/blob/master/include/linux/sched.h
    cdef enum:
        CLONE_NEWNS

In your .pyx file:

from your_compiled_cython_package cimport CLONE_NEWNS

print(CLONE_NEWNS)

I hope this can be helpful for someone as it was for me =)