validation of MKL 2018.0.3 openmp initialization fixes

ext.pyx

cimport numpy as np
import numpy as np
import cython
from cython.parallel import prange

@cython.boundscheck(False)
@cython.wraparound(False)
@cython.cdivision(True)
def p_arange(int n):
    '''
    A useless function only for demonstration purposes
    '''
    cdef np.ndarray[np.int_t, ndim=1] ret = np.zeros(n)
    for i in range(n, schedule='guided', nogil=True):
        ret[i] = i
    return ret

meta.yaml

package:
  name: mkl_blas_test
  version: 1.0

source:
  path: .

build:
  script:
    - python setup.py install

requirements:
  # build:
    # - {{ compiler('c') }}
  host:
    - gcc
    - python
    - cython
    - numpy-devel
  run:
    - python
    - scipy
    - blas=*=mkl

run_test.py

import os
import sys
import numpy as np
import scipy.linalg

n = 50
eye = np.eye(n+1, n+1)

### do something with scipy; comment to make go BOOM!
# scipy.linalg.svd(eye)

# now import the extension
import ext

u, s, vh = scipy.linalg.svd(eye)
eye2 = u @ np.diag(s) @ vh

all_close = np.allclose(eye, eye2)
if all_close:
    print("Whew")
else:
   print("BOOM!")
   sys.exit(1)
print("All close?", all_close)
print("Min(eye2):", np.min(eye2))

setup.py

from distutils.core import setup
from distutils.extension import Extension
from Cython.Build import cythonize
from numpy.distutils.core import setup

extensions = [
    Extension("ext", ["ext.pyx"],
        include_dirs = ['/opt/MacOSX10.9.sdk/usr/include'])]
setup(
    name = "My hello app",
    ext_modules = cythonize(extensions),
)