- Issue #3718: Use AC_ARG_VAR to set MACHDEP in configure.ac.

diff --cc Misc/NEWS
index 80c6912f74b1f0a215e0fc42444e94b9703c4cf3,c58ab661e988514adc4a788d0e7ca6d6afa06f56..01842ce5c2fb566c83a76e69071b6a2625d9db5d
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -765,10 -547,8 +765,12 @@@ Test
  Build
  -----
  
+ - Issue #3718: Use AC_ARG_VAR to set MACHDEP in configure.ac.
+ 
 +- Issue #16235: Implement python-config as a shell script.
 +
 +- Issue #16769: Remove outdated Visual Studio projects.
 +
  - Issue #17031: Fix running regen in cross builds.
  
  - Issue #3754: fix typo in pthread AC_CACHE_VAL.

diff --cc configure
Simple merge

diff --cc configure.ac
Simple merge