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-<html><head><title>
-Porting Hints
-</title></head><body><h3>
-Porting Hints
-</h3>
-
-<img align=left src=pic/wingdorothy.gif><a href=http://www.eecis.udel.edu/~mills/pictures.htm>from <i>The
-Wizard of Oz</i>, L. Frank Baum</a>
-
-<p>Porting Dorothy in Oz.
-<br clear=left><hr>
-
-<p>NOTE: The following procedures have been replaced by GNU automake and
-autoconfigure. This page is to be updated in the next release.
-
-<p>Porting to a new machine or operating system ordinarily requires
-updating the <code>./machines</code> directory and the
-<code>./compilers</code> directories in order to define the build
-environment and autoconfigure means. You will probably have to modify
-the <code>ntp_machines.h</code> file and <code>"l_stdlib.h"</code> files
-as well. The two most famous trouble spots are the I/O code in
-<code>./ntpd/ntp_io.c</code> and the clock adjustment code in
-<code>./ntpd/ntp_unixclock.c</code>.
-
-<p>These are the rules so that older bsd systems and the POSIX standard
-system can coexist together.
-
-<ol>
-
-<li>If you use <code>select</code> then include
-<code>"ntp_select.h"</code>. <code>select</code> is not standard, since
-it is very system dependent as to where it is defined. The logic to
-include the right system dependent include file is in
-<code>"ntp_select.h"</code>.
-
-<p><li>Always use POSIX definition of strings. Include
-<code>"ntp_string.h"</code> instead of <code>&lt;string.h&gt;</code>.
-
-<p><li>Always include <code>"ntp_malloc.h"</code> if you use
-<code>malloc</code>.
-
-<p><li>Always include <code>"ntp_io.h"</code> instead of
-<code>&lt;sys/file.h&gt;</code> or <code>&lt;fnctl.h&gt;</code> to get
-<code>O_*</code> flags.
-
-<p><li>Always include <code>"ntp_if.h"</code> instead of
-<code>&lt;net/if.h&gt;</code>.
-
-<p><li>Always include <code>"ntp_stdlib.h"</code> instead of
-<code>&lt;stdlib.h&gt;</code>.
-
-<p><li>Define any special defines needed for a system in
-<code>./include/ntp_machine.h</code> based on system identifier. This
-file is included by the <code>"ntp_types.h"</code> file and should
-always be placed first after the <code>&lt;&gt;</code> defines.
-
-<p><li>Define any special library prototypes left over from the system
-library and include files in the <code>"l_stdlib.h"</code> file. This
-file is included by the <code>"ntp_stdlib.h"</code> file and should
-ordinarily be placed last in the includes list.
-
-<p><li>Don't define a include file by the same name as a system include
-file.
-
-</ol>
-
-<p><code>"l_stdlib.h"</code> can contain any extra definitions that are
-needed so that <code>gcc</code> will shut up. They should be controlled
-by a system identifier and there should be a separate section for each
-system. Really this will make it easier to maintain.
-
-<p>See <code>include/ntp_machines.h</code> for the various compile time
-options.
-
-<p>When you are satisfied the port works and that other ports are not
-adversely affected, please send <a href="patches.htm">patches</a> for
-the system files you have changed, as well as any documentation that
-should be updated, including the advice herein.
-
-<p>Good luck.
-
-<hr><a href=index.htm><img align=left src=pic/home.gif></a><address><a
-href=mailto:mills@udel.edu> David L. Mills &lt;mills@udel.edu&gt;</a>
-</address></a></body></html>