Closed
Description
Building numpy from git fails when Cythonizing numpy/random/mtrand/mtrand.pyx, due to an error Pythonic division not allowed without gil, consider using cython.cdivision(True). This is Python 3.5.0, Cython 0.23.4, with numpy git revision d94043f0fb93985fd4302eae9fcdca2d79239908 on branch master. The same problem occurs on branch maintenance/1.10.x with commit 76db1ab4edef69e310426dccf95c15212b1ba4a6, and on branch maintenance/1.9.x with commit edb902cdc6573553afcf11047ecdfb447e444322. However, a regular pip install numpy (which installs 1.10.1), works (because releases include compiled cython files, but version control does not). The failures occur as follows:
$ python3.5 setup.py build_ext
Running from numpy source directory.
Cythonizing sources
Processing numpy/random/mtrand/mtrand.pyx
Error compiling Cython file:
------------------------------------------------------------
...
i = 0
while i < sz:
Sum = 1.0
dn = n
for j from 0 <= j < d-1:
mnix[i+j] = rk_binomial(self.internal_state, dn, pix[j]/Sum)
^
------------------------------------------------------------
mtrand.pyx:4484:75: Pythonic division not allowed without gil, consider using cython.cdivision(True)
Traceback (most recent call last):
File "/tmp/numpy/tools/cythonize.py", line 199, in <module>
main()
File "/tmp/numpy/tools/cythonize.py", line 195, in main
find_process_files(root_dir)
File "/tmp/numpy/tools/cythonize.py", line 187, in find_process_files
process(cur_dir, fromfile, tofile, function, hash_db)
File "/tmp/numpy/tools/cythonize.py", line 161, in process
processor_function(fromfile, tofile)
File "/tmp/numpy/tools/cythonize.py", line 72, in process_pyx
raise Exception('Cython failed')
Exception: Cython failed
Traceback (most recent call last):
File "setup.py", line 263, in <module>
setup_package()
File "setup.py", line 251, in setup_package
generate_cython()
File "setup.py", line 199, in generate_cython
raise RuntimeError("Running cythonize failed!")
RuntimeError: Running cythonize failed!
What's going wrong?