autoupdate - Update a configure.ac to a newer Autoconf
autoupdate [OPTION]... [TEMPLATE-FILE]...
Update each TEMPLATE-FILE if given, or 'configure.ac' if present, or else 'configure.in', to the syntax of the current version of Autoconf. The original files are backed up.
print this help, then exit
print version number, then exit
verbosely report processing
don't remove temporary files
consider all files obsolete
prepend directory DIR to search path
append directory DIR to search path
Written by David J. MacKenzie and Akim Demaille.
Report bugs to <bug-autoconf@gnu.org>.
GNU Autoconf home page: https://www.gnu.org/software/autoconf/.
General help using GNU software: https://www.gnu.org/gethelp/.
Copyright © 2021 Free Software Foundation, Inc. License GPLv3+/Autoconf: GNU GPL version 3 or later https://gnu.org/licenses/gpl.html, https://gnu.org/licenses/exceptions.html
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
autoconf(1), automake(1), autoreconf(1), autoupdate(1), autoheader(1), autoscan(1), config.guess(1), config.sub(1), ifnames(1), libtool(1).
The full documentation for autoupdate is maintained as a Texinfo manual. If the info and autoupdate programs are properly installed at your site, the command
info autoupdate
should give you access to the complete manual.