Fix #1563807: _ctypes built on AIX fails with ld ffi error.
The contents of ffi_darwin.c must be compiled unless __APPLE__ is
defined and __ppc__ is not.
Will backport.
diff --git a/Misc/NEWS b/Misc/NEWS
index a0403de..b2fbe7f 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -101,6 +101,8 @@
Library
-------
+- Bug #1563807: _ctypes built on AIX fails with ld ffi error.
+
- Bug #1598620: A ctypes Structure cannot contain itself.
- Patch #1362975: Rework CodeContext indentation algorithm to
diff --git a/Modules/_ctypes/libffi/src/powerpc/ffi_darwin.c b/Modules/_ctypes/libffi/src/powerpc/ffi_darwin.c
index 1595b00..55af70c 100644
--- a/Modules/_ctypes/libffi/src/powerpc/ffi_darwin.c
+++ b/Modules/_ctypes/libffi/src/powerpc/ffi_darwin.c
@@ -1,4 +1,4 @@
-#ifdef __ppc__
+#if !(defined(__APPLE__) && !defined(__ppc__))
/* -----------------------------------------------------------------------
ffi.c - Copyright (c) 1998 Geoffrey Keating