“The Autoconf team is extremely proud (and quite
relieved) to announce the release of Autoconf 2.50. As can be
guessed from the NEWS excerpt below, profound changes have been
made in order to provide a more coherent interface and more
user-friendly macros.”** Lots of bug fixes There have been far too many to enumerate them here. Check out ChangeLog if you really want to know more. ** Improved documentation In particular, portability issues are better covered. ** Use of Automake All the standard GNU Makefile targets are supported. The layout has changed: m4/ holds the m4 extensions Autoconf needs for its configuration, doc/ contains the documentation, and tests/ contains the test suite. ** Man pages are provided For autoconf, autoreconf, autoupdate, autoheader, autoscan, ifnames, config.guess, config.sub.
LinuxProgramming has
download links and the complete NEWS file