Issue #10656: Merge AIX build fix from 3.6

diff --cc Makefile.pre.in
Simple merge

diff --cc Misc/ACKS
Simple merge

diff --cc Misc/NEWS
index 9bb3af229d8204dadb3ccd0504a9f6f8a365456b,18233b718293af8c4371ae36b3783854858b1380..b965a75b0dd26ebcbcc75b677f39419e39228633
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -425,24 -484,6 +425,27 @@@ Documentatio
  Build
  -----
  
++- Issue #10656: Fix out-of-tree building on AIX.  Patch by Tristan Carel and
++  Michael Haubenwallner.
++
 +- Issue #26359: Rename --with-optimiations to --enable-optimizations.
 +
 +- Issue #28444: Fix missing extensions modules when cross compiling.
 +
 +- Issue #28208: Update Windows build and OS X installers to use SQLite 3.14.2.
 +
 +- Issue #28248: Update Windows build and OS X installers to use OpenSSL 1.0.2j.
 +
 +- Issue #21124: Fix building the _struct module on Cygwin by passing ``NULL``
 +  instead of ``&PyType_Type`` to PyVarObject_HEAD_INIT.  Patch by Masayuki
 +  Yamamoto.
 +
 +- Issue #13756: Fix building extensions modules on Cygwin.  Patch by Roumen
 +  Petrov, based on original patch by Jason Tishler.
 +
 +- Issue #21085: Add configure check for siginfo_t.si_band, which Cygwin does
 +  not provide.  Patch by Masayuki Yamamoto with review and rebase by Erik Bray.
 +
  - Issue #28258: Fixed build with Estonian locale (python-config and distclean
    targets in Makefile).  Patch by Arfrever Frehtes Taifersar Arahesis.
  

diff --cc configure
Simple merge

diff --cc configure.ac
Simple merge