Homepage: https://www.gnu.org/software/emacs
Author: Dave Love
Mode for editing Autoconf configure.ac files
Provides fairly minimal font-lock, imenu and indentation support for editing configure.ac files. Only Autoconf syntax is processed. There is no attempt to deal with shell text -- probably that will always lose. This is specialized for configure.ac files. It doesn't inherit the general M4 stuff from M4 mode. There is also an autoconf-mode.el in existence. That appears to be for editing the Autoconf M4 source, rather than configure.ac files.