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<h3>
Holger Levsen pushed to branch master
at <a href="https://salsa.debian.org/reproducible-builds/reproducible-website">Reproducible Builds / reproducible-website</a>
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<h4>
Commits:
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<strong><a href="https://salsa.debian.org/reproducible-builds/reproducible-website/commit/4e8be2a1de4f6bfdcb6ecccf0773021a9343525f">4e8be2a1</a></strong>
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<span>by Holger Levsen</span>
<i>at 2019-08-03T18:54:05Z</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">201907 report: expand on http://bora.uib.no/handle/1956/20411 thanks to MR41 by Foxboron

Signed-off-by: Holger Levsen <holger@layer-acht.org>
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<h4>1 changed file:</h4>
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<a href="#473aa29676fb9dad6f6985c138f659f68f831ddb">
_reports/2019-07.md
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<h4>Changes:</h4>
<li id="473aa29676fb9dad6f6985c138f659f68f831ddb">
<a href="https://salsa.debian.org/reproducible-builds/reproducible-website/commit/4e8be2a1de4f6bfdcb6ecccf0773021a9343525f#473aa29676fb9dad6f6985c138f659f68f831ddb"><strong>_reports/2019-07.md</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -34,7 +34,7 @@ Later in the month, F-Droid's aforementioned reproducibility status was mentione</td>
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<pre style="margin: 0;"> <span id="LC35" class="line" lang="markdown"><span class="p">[</span><span class="nv" style="color: #008080;">![</span><span class="p">](</span><span class="sx" style="color: #d14;">{{</span> <span class="nn" style="color: #555;">"/images/reports/2019-07/thesis.png#right"</span> | prepend: site.baseurl }})](http://bora.uib.no/handle/1956/20411)</span>
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<pre style="margin: 0;">-<span id="LC37" class="line" lang="markdown">Morten ("<span class="ge" style="font-style: italic;">*Foxboron*</span>") Linderud published his academic thesis "<span class="p">[</span><span class="nv" style="color: #008080;">*Reproducible Builds: break a log, good things come in trees*</span><span class="p">](</span><span class="sx" style="color: #d14;">http://bora.uib.no/handle/1956/20411</span><span class="p">)</span>" which investigates and describes how transparency log overlays can provide additional security guarantees for "rebuilders" producing software packages. The thesis was part of Morten's studies at the <span class="p">[</span><span class="nv" style="color: #008080;">University of Bergen</span><span class="p">](</span><span class="sx" style="color: #d14;">https://www.uib.no/</span><span class="p">)</span>, Norway<span class="idiff left right">.</span></span>
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<pre style="margin: 0;">+<span id="LC37" class="line" lang="markdown">Morten ("<span class="ge" style="font-style: italic;">*Foxboron*</span>") Linderud published his academic thesis "<span class="p">[</span><span class="nv" style="color: #008080;">*Reproducible Builds: break a log, good things come in trees*</span><span class="p">](</span><span class="sx" style="color: #d14;">http://bora.uib.no/handle/1956/20411</span><span class="p">)</span>" which investigates and describes how transparency log overlays can provide additional security guarantees for "rebuilders" producing software packages. The thesis was part of Morten's studies at the <span class="p">[</span><span class="nv" style="color: #008080;">University of Bergen</span><span class="p">](</span><span class="sx" style="color: #d14;">https://www.uib.no/</span><span class="p">)</span>, Norway<span class="idiff left"> and is an extension of the work New York University has been doing with </span><span class="p"><span class="idiff">[</span></span><span class="nv" style="color: #008080;"><span class="idiff">package rebuilder integration in APT</span></span><span class="p"><span class="idiff">](</span></span><span class="sx" style="color: #d14;"><span class="idiff">https://www.youtube.com/watch?v=hbHa4OFv7Qo</span></span><span class="p"><span class="idiff right">)</span></span></span>
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<pre style="margin: 0;"> <span id="LC39" class="line" lang="markdown"><span class="p">[</span><span class="nv" style="color: #008080;">Mike Hommey</span><span class="p">](</span><span class="sx" style="color: #d14;">https://glandium.org</span><span class="p">)</span> posted to his blog about <span class="p">[</span><span class="nv" style="color: #008080;">*Reproducing the Linux builds of Firefox 68*</span><span class="p">](</span><span class="sx" style="color: #d14;">https://glandium.org/blog/?p=3923</span><span class="p">)</span> which leverages that builds shipped by Mozilla should be reproducible from this version onwards. He discusses the problems caused by the builds being optimised with <span class="p">[</span><span class="nv" style="color: #008080;">Profile-guided Optimisation</span><span class="p">](</span><span class="sx" style="color: #d14;">https://en.wikipedia.org/wiki/Profile-guided_optimization</span><span class="p">)</span> <span class="p">(</span><span class="sx" style="color: #d14;">PGO</span><span class="p">)</span> but armed with the now-published profiling data he provides <span class="p">[</span><span class="nv" style="color: #008080;">Docker</span><span class="p">](</span><span class="sx" style="color: #d14;">https://www.docker.com/</span><span class="p">)</span>-based instructions how to reproduce the published builds for yourself.</span>
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