(autoconf.info)Autoconf 1


Upgrading From Version 1
========================

   Autoconf version 2 is mostly backward compatible with version 1.
However, it introduces better ways to do some things, and doesn't
support some of the ugly things in version 1.  So, depending on how
sophisticated your `configure.ac' files are, you might have to do some
manual work in order to upgrade to version 2.  This chapter points out
some problems to watch for when upgrading.  Also, perhaps your
`configure' scripts could benefit from some of the new features in
version 2; the changes are summarized in the file `NEWS' in the
Autoconf distribution.

Changed File Names: Files you might rename
Changed Makefiles: New things to put in `Makefile.in'
Changed Macros: Macro calls you might replace
Changed Results: Changes in how to check test results
Changed Macro Writing: Better ways to write your own macros

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