patch 9.0.1823: Autoconf 2.69 too old Commit: https://github.com/vim/vim/commit/a96d544bc355b1a6021feccf5fa2bd5659bc5269 Author: Illia Bobyr <illia.bobyr@gmail.com> Date: Wed Aug 30 16:30:15 2023 +0200 patch 9.0.1823: Autoconf 2.69 too old Problem: Autoconf 2.69 too old Solution: Migrate to Autoconf 2.71 Autoconf 2.69 is almost 10 years old. And 2.71 is also a few years old as well. Should be pretty well tested by now. It brings a lot of improvements and there seems to be an ongoing work on autoconf 2.72 already. This change just addresses two minor changes `autoupdate` suggested, and then `src/auto/configure` is regenerated by running cd src make AUTOCONF=autoconf2.71 autoconf closes: #12958 Signed-off-by: Christian Brabandt <cb@256bit.org> Co-authored-by: Illia Bobyr <illia.bobyr@gmail.com>

--- a/src/Makefile
+++ b/src/Makefile
@@ -627,7 +627,7 @@ CClink = $(CC)
 #EXTRA_LIBS = /usr/local/lib/libefence.a
 
 # Autoconf binary.
-AUTOCONF = autoconf
+AUTOCONF ?= autoconf
 
 # PURIFY - remove the # to use the "purify" program (hoi Nia++!)
 #PURIFY = purify
@@ -2014,9 +2014,6 @@ reconfig: scratch clean
 # - Use sed to change ./config.log to auto/config.log in the configure script.
 # Autoconf 2.5x (2.59 at least) produces a few more files that we need to take
 # care of:
-# - configure.lineno: has the line numbers replaced with $LINENO.  That
-#   improves patches a LOT, thus use it instead (until someone says it doesn't
-#   work on some system).
 # - autom4te.cache directory is created and not cleaned up.  Delete it.
 # - Uses ">config.log" instead of "./config.log".
 autoconf: