Excise DL_EXPORT from Include.
Thanks to Skip Montanaro and Kalle Svensson for the patches.
diff --git a/Include/cellobject.h b/Include/cellobject.h
index f3eef55..2a6dcaa 100644
--- a/Include/cellobject.h
+++ b/Include/cellobject.h
@@ -11,13 +11,13 @@
PyObject *ob_ref;
} PyCellObject;
-extern DL_IMPORT(PyTypeObject) PyCell_Type;
+PyAPI_DATA(PyTypeObject) PyCell_Type;
#define PyCell_Check(op) ((op)->ob_type == &PyCell_Type)
-extern DL_IMPORT(PyObject *) PyCell_New(PyObject *);
-extern DL_IMPORT(PyObject *) PyCell_Get(PyObject *);
-extern DL_IMPORT(int) PyCell_Set(PyObject *, PyObject *);
+PyAPI_FUNC(PyObject *) PyCell_New(PyObject *);
+PyAPI_FUNC(PyObject *) PyCell_Get(PyObject *);
+PyAPI_FUNC(int) PyCell_Set(PyObject *, PyObject *);
#define PyCell_GET(op) (((PyCellObject *)(op))->ob_ref)
#define PyCell_SET(op, v) (((PyCellObject *)(op))->ob_ref = v)