Closes #27979: Remove bundled copy of libffi

An installed copy of libffi is now required for building _ctypes on any platform but OSX and Windows.
python · Sep 17, 2016 · f40d4dd · f40d4dd
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diff --git a/Doc/whatsnew/3.7.rst b/Doc/whatsnew/3.7.rst
@@ -94,6 +94,10 @@ Optimizations
 Build and C API Changes
 =======================
 
+* A full copy of libffi is no longer bundled for use when building the
+  :mod:`_ctypes <ctypes>` module on non-OSX UNIX platforms.  An installed copy
+  of libffi is now required when building ``_ctypes`` on such platforms.
+  Contributed by Zachary Ware in :issue:`27979`.
 
 
 Deprecated

diff --git a/Misc/NEWS b/Misc/NEWS
@@ -64,6 +64,10 @@ Library
 Build
 -----
 
+- Issue #27979: A full copy of libffi is no longer bundled for use when
+  building _ctypes on non-OSX UNIX platforms.  An installed copy of libffi is
+  now required when building _ctypes on such platforms.
+
 - Issue #15819: Remove redundant include search directory option for building
   outside the source tree.
 

diff --git a/Modules/_ctypes/libffi.diff b/Modules/_ctypes/libffi.diff