Patch by Vadim A. Misbakh-Soloviov (mva)
https://bugs.gentoo.org/show_bug.cgi?id=564454

--- lib_pypy/_curses.py.old     2016-01-18 19:13:00.241886442 +0000
+++ lib_pypy/_curses.py 2016-01-18 19:26:01.061885605 +0000
@@ -1,6 +1,7 @@
 """Reimplementation of the standard extension module '_curses' using cffi."""

 import sys
+import platform
 if sys.platform == 'win32':
     #This module does not exist in windows
     raise ImportError('No module named _curses')
@@ -10,12 +11,18 @@

 ffi = FFI()

+# Monkeypatch to make it build against ncurses-6.
+# Inspired by https://goo.gl/xvjQcd
+_type = "uint32_t"
+if platform.machine() == "x86_64":
+    _type = "unsigned"
+
 ffi.cdef("""
 typedef ... WINDOW;
 typedef ... SCREEN;
-typedef unsigned long mmask_t;
+typedef """+_type+""" mmask_t;
 typedef unsigned char bool;
-typedef unsigned long chtype;
+typedef """+_type+""" chtype;
 typedef chtype attr_t;

 typedef struct