+** Deprecated machine types and operating systems
+
+Certain machine types and operating systems have been deprecated. On
+these systems, configure will print a warning and exit, and you must
+edit the configure script for compilation to proceed. The deprecated
+systems will not be supported at all in Emacs 23. We are not aware of
+anyone running Emacs on these systems; if you are, please email
+emacs-devel@gnu.org to take it off the list of deprecated systems.
+
+*** Deprecated machine types
+pmax, hp9000s300, ibm370aix, ncr386, ews4800, mips-siemens, powerpcle,
+and tandem-s2
+
+*** Deprecated operating systems
+bsd386, bsdos2-1, bsdos2, bsdos3, bsdos4, bsd4-1, bsd4-2, bsd4-3,
+usg5-0, usg5-2-2, usg5-2, usg5-3, ultrix4-3, 386bsd, hpux, hpux8,
+hpux9, hpux9shr, hpux10, hpux10-20, aix3-1, aix3-2-5, aix3-2, aix4-1,
+nextstep, ux4800, uxpds, and uxpv
+