Issue #28444: Merge with 3.6.

diff --cc Makefile.pre.in
Simple merge

diff --cc Misc/NEWS
index 1aad47810fbbeb2f822a3bac423f31b1e302de53,75f0ba6afb78e4bf9b9511bda58be44516dc1326..97de337a600d581e7675fc3747d2dbb7cda36862
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -357,20 -368,6 +357,22 @@@ C AP
  Build
  -----
  
++- Issue #28444: Fix missing extensions modules when cross compiling.
++
 +- Issue #28208: Update Windows build to use SQLite 3.14.2.0.
 +
 +- Issue #28248: Update Windows build 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 Modules/makesetup
Simple merge

diff --cc setup.py
Simple merge