Use __Pyx_PyIndex_Check instead of PyIndex_Check

Cython/Includes/cpython/number.pxd

@@ -246,6 +246,6 @@ cdef extern from "Python.h":
     # and the value is clipped to PY_SSIZE_T_MIN for a negative
     # integer or PY_SSIZE_T_MAX for a positive integer.
 
-    bint PyIndex_Check(object o)
+    bint PyIndex_Check "__Pyx_PyIndex_Check" (object)
     # Returns True if o is an index integer (has the nb_index slot of
     # the tp_as_number structure filled in).

Cython/Utility/MemoryView.pyx

@@ -6,7 +6,7 @@ import cython
 
 # from cpython cimport ...
 cdef extern from "Python.h":
-    int PyIndex_Check(object)
+    int PyIndex_Check "__Pyx_PyIndex_Check" (object)
     object PyLong_FromVoidPtr(void *)
 
 cdef extern from "pythread.h":

Cython/Utility/MemoryView_C.c

@@ -115,12 +115,6 @@ static CYTHON_INLINE int __pyx_sub_acquisition_count_locked(__pyx_atomic_int *ac
 #define __PYX_XDEC_MEMVIEW(slice, have_gil) __Pyx_XDEC_MEMVIEW(slice, have_gil, __LINE__)
 static CYTHON_INLINE void __Pyx_INC_MEMVIEW({{memviewslice_name}} *, int, int);
 static CYTHON_INLINE void __Pyx_XDEC_MEMVIEW({{memviewslice_name}} *, int, int);
-
-#if PY_VERSION_HEX < 0x02050000
-    /* NumPy headers define PyIndex_Check incorrectly */
-    #undef PyIndex_Check
-    #define PyIndex_Check(o) (PyNumber_Check(o) && !PyFloat_Check(o) && !PyComplex_Check(o))
-#endif
 /////////////// MemviewSliceIndex.proto ///////////////
 static CYTHON_INLINE char *__pyx_memviewslice_index_full(const char *bufp, Py_ssize_t idx, Py_ssize_t stride, Py_ssize_t suboffset);
 

Cython/Utility/ModuleSetupCode.c

@@ -52,12 +52,15 @@
                                 (PyErr_Format(PyExc_TypeError, \
                                               "expected index value, got %.200s", Py_TYPE(o)->tp_name), \
                                  (PyObject*)0))
-  #define PyIndex_Check(o)     (PyNumber_Check(o) && !PyFloat_Check(o) && !PyComplex_Check(o))
+  #define __Pyx_PyIndex_Check(o) (PyNumber_Check(o) && !PyFloat_Check(o) && \
+                                  !PyComplex_Check(o))
+  #define PyIndex_Check __Pyx_PyIndex_Check
   #define PyErr_WarnEx(category, message, stacklevel) PyErr_Warn(category, message)
   #define __PYX_BUILD_PY_SSIZE_T "i"
 #else
   #define __PYX_BUILD_PY_SSIZE_T "n"
   #define CYTHON_FORMAT_SSIZE_T "z"
+  #define __Pyx_PyIndex_Check PyIndex_Check
 #endif
 
 #if PY_VERSION_HEX < 0x02060000