What are the restrictions on distributing
scripts that Autoconf generates? How does that affect my
programs that use them?
There are no restrictions on how the configuration scripts that Autoconf
produces may be distributed or used. In Autoconf version 1, they were
covered by the GNU General Public License. We still encourage
software authors to distribute their work under terms like those of the
GPL, but doing so is not required to use Autoconf.
Of the other files that might be used with
`config.h.in' is under whatever copyright you use for your
`configure.ac'. `config.sub' and `config.guess' have an
exception to the GPL when they are used with an Autoconf-generated
configure script, which permits you to distribute them under the
same terms as the rest of your package. `install-sh' is from the X
Consortium and is not copyrighted.