23.5.1 Autoconf macro archive

In mid-1999, an official Autoconf macro archive was established on the World Wide Web by Peter Simons in Germany. The archive collects useful Autoconf macros that might be useful to some users, but are not sufficiently general purpose to include in the core Autoconf distribution. The URL for the macro archive is:

https://www.gnu.org/software/ac-archive/

It is possible to retrieve macros that perform different kinds of tests from this archive. The macros can then be inserted, in line, into your `aclocal.m4' or `acinclude.m4' file. The archive has been steadily growing since its inception. Please try and submit your macros to the archive!