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<div class="moz-cite-prefix">Hi Matt:<br>
<br>
I suspect a fair portion of the size increase comes along with
moving to the use of the Bind9 libraries, versus the code that
resides in the "minires" directory. We gained a good great deal
by having common code, with improved performance and robustness
as well as in functionality, but apparently at a price of binary
footprint.<br>
<br>
It may be possible to reduce the size of the Bind9 libraries based
on capabilities excluded through compilation flags when building
them but this would have to be researched.<br>
<br>
Regards,<br>
<br>
Thomas Markwalder<br>
ISC Software Engineering<br>
<br>
<br>
<br>
On 9/30/16 9:09 AM, Bancroft, Matt wrote:<br>
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<div class="WordSection1">
<p class="MsoNormal"><span style="color:#1F497D">It is 1.8Mb
stripped with the changes you suggested
</span><span style="font-family:Wingdings;color:#1F497D">J</span><span
style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">It would be
great to have it at about 500Kb.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Matt<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<div>
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1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
dhcp-users [<a class="moz-txt-link-freetext" href="mailto:dhcp-users-bounces@lists.isc.org">mailto:dhcp-users-bounces@lists.isc.org</a>]
<b>On Behalf Of </b>Thomas Markwalder<br>
<b>Sent:</b> 30 September 2016 13:30<br>
<b>To:</b> Users of ISC DHCP<br>
<b>Subject:</b> Re: dhclient binary size<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">Matt:<br>
<br>
To get a 4.1 size of 500Kb, the executable must be
stripped. The default bin produced isn't stripped, so you
can start there.<br>
<br>
Thomas<br>
<br>
On 9/30/16 6:23 AM, Bancroft, Matt wrote:<o:p></o:p></p>
</div>
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<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New Roman
, serif","serif"">Thomas,
</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New Roman
, serif","serif""><br>
Thanks for the suggestion. Your changes reduce the binary
size by 100Kb. However, the binary went from ~500Kb to 2Mb
when updating from 4.1-ESV-Rx to 4.3.4, so the 100Kb is
not really a significant reduction.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New Roman
, serif","serif"">I am compiling for arm if
that makes any difference. And the main reason for the
upgrade is to support all the new dhcpv6 options,
particularly the –D option introduce in 4.2.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New Roman
, serif","serif"">The client is being used
in an embedded environment so binary size is an important
issue.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New Roman
, serif","serif""><br>
Can you suggest any other way to reduce the binary size? </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New Roman
, serif","serif""> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New Roman
, serif","serif"">Kind Regards,</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New Roman
, serif","serif"">Matt Bancroft</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<div>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
dhcp-users [<a moz-do-not-send="true"
href="mailto:dhcp-users-bounces@lists.isc.org">mailto:dhcp-users-bounces@lists.isc.org</a>]
<b>On Behalf Of </b>Thomas Markwalder<br>
<b>Sent:</b> 28 September 2016 15:55<br>
<b>To:</b> <a moz-do-not-send="true"
href="mailto:dhcp-users@lists.isc.org">dhcp-users@lists.isc.org</a><br>
<b>Subject:</b> Re: dhclient binary size</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<p class="MsoNormal">On 9/28/16 10:23 AM, Bancroft, Matt
wrote:<o:p></o:p></p>
</div>
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<p class="MsoNormal"><span lang="EN-GB">Hi, </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB">Between </span>4.1-ESV-R12b1
and 4.3.4 the binary size of the dhclient significantly
increased.
<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">I‘ve had a search back through posts
and cannot see any discussion about why this is;
presumably the DDNS changes?<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Is there any way to compile a minimum
feature version to maintain a small binary size for the
client?<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Kind Regards,<o:p></o:p></p>
<p class="MsoNormal">Matt Bancroft<o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman , serif","serif""><br>
<br>
<br>
</span><o:p></o:p></p>
</blockquote>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New Roman
, serif","serif"">Hello Matt:<br>
<br>
If you do not need the client to support DNS updates, you
can compile it out. To do so you need to:<br>
<br>
1. Undefine NSUPDATE (comment it out) in includes/site.<br>
2. dhclient_ddns_cb_free(), needs to be wrapped with
NSUPDATE conditional compilation.
<br>
<br>
Rebuild.<br>
<br>
I have attached a diff, containing these changes. The
resulting client is notably smaller. Please note that,
these changes have<br>
not been tested and are use-at-your-own-risk. <br>
<br>
Sincerely,<br>
<br>
Thomas Markwalder<br>
ISC Software Engineering<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
</span><o:p></o:p></p>
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<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
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<br>
<br>
<o:p></o:p></span></p>
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