ENH: update to NPY_1_8_API_VERSION

Author: mattip

pandas/_libs/hashtable.pxd

@@ -1,3 +1,9 @@
+cdef extern from *:
+    """
+    /* allow direct access to PyArrayObject_fields's members */
+    #define NPY_NO_DEPRECATED_API NPY_1_6_API_VERSION
+    """
+
 from khash cimport (kh_int64_t, kh_uint64_t, kh_float64_t, kh_pymap_t,
                     kh_str_t, uint64_t, int64_t, float64_t)
 from numpy cimport ndarray

pandas/_libs/parsers.pyx

@@ -26,6 +26,11 @@ cdef extern from "Python.h":
     object PyUnicode_Decode(char *v, Py_ssize_t size, char *encoding,
                             char *errors)
 
+cdef extern from *:
+    """
+    /* allow direct access to PyArrayObject_fields's members */
+    #define NPY_NO_DEPRECATED_API NPY_1_6_API_VERSION
+    """
 
 import numpy as np
 cimport numpy as cnp

pandas/_libs/reduction.pyx

@@ -7,6 +7,12 @@ from cpython cimport Py_INCREF
 
 from libc.stdlib cimport malloc, free
 
+cdef extern from *:
+    """
+    /* allow direct access to PyArrayObject_fields's members */
+    #define NPY_NO_DEPRECATED_API NPY_1_6_API_VERSION
+    """
+
 import numpy as np
 cimport numpy as cnp
 from numpy cimport (ndarray,

pandas/_libs/sparse.pyx

@@ -4,6 +4,12 @@ import sys
 
 cimport cython
 
+cdef extern from *:
+    """
+    /* allow direct access to PyArrayObject_fields's members */
+    #define NPY_NO_DEPRECATED_API NPY_1_6_API_VERSION
+    """
+
 import numpy as np
 cimport numpy as cnp
 from numpy cimport (ndarray, uint8_t, int64_t, int32_t, int16_t, int8_t,

pandas/_libs/src/ujson/python/JSONtoObj.c

@@ -41,6 +41,7 @@ Numeric decoder derived from from TCL library
 #include "py_defines.h"
 #define PY_ARRAY_UNIQUE_SYMBOL UJSON_NUMPY
 #define NO_IMPORT_ARRAY
+#define NPY_NO_DEPREACTED_API NPY_1_6_API_VERSION
 #include <numpy/arrayobject.h>  // NOLINT(build/include_order)
 #include <ultrajson.h>          // NOLINT(build/include_order)
 

pandas/_libs/window.pyx

@@ -7,12 +7,17 @@ from libcpp.deque cimport deque
 
 from libc.stdlib cimport malloc, free
 
+cdef extern from *:
+    """
+    /* allow direct access to PyArrayObject_fields's members */
+    #define NPY_NO_DEPRECATED_API NPY_1_6_API_VERSION
+    """
+
 import numpy as np
 cimport numpy as cnp
 from numpy cimport ndarray, double_t, int64_t, float64_t, float32_t
 cnp.import_array()
 
-
 cdef extern from "src/headers/cmath" namespace "std":
     bint isnan(double) nogil
     int signbit(double) nogil