+** A new portable dumper is available.
+
+Olivier Galibert has written a portable dumper for XEmacs, based on
+initial work by Kyle Jones. Normally, XEmacs C sources link into an
+executable called `temacs', which loads the Lisp code and "unexecs"
+into a proper `xemacs' executable. The unexec() process is unreliable
+and makes XEmacs hard to port to new operating systems, or even to new
+releases of old systems.
+
+A portable dumper is a different approach to dumping: instead of
+dumping full-fledged executable, it only dumps out the initialized
+data structures (both Lisp and C) into an external file. A normally
+running XEmacs only needs to mmap() that file and relocate a bit to
+get to the initialized data. In that scheme, there is no difference
+between `temacs' and `xemacs'.
+
+This is all very experimental, though. Configure with `--pdump' to
+try testing it. NOTE: it is expected that `make' will fail after
+dumping `xemacs.dmp'. This is because Makefiles have not yet been
+modified to not expect `temacs' producing an `xemacs' executable. You
+can try it out by simply running `src/temacs'. If it starts without
+failure, the portable dumping worked.
+