View all weekly reports

Reproducible Builds: Weekly report #53

Published: May 2, 2016.

What happened in the Reproducible Builds effort between April 24th and 30th 2016.

Media coverage

Reproducible builds were mentioned explicitly in two talks at the Mini-DebConf in Vienna:

  • Martin Michlmayr had a talk in which he presented an overview about innovations and changes in Debian in the last years. Martin expressed his disappointment that there was no talk from us in Vienna (we’ll fix this at DebConf16 in Cape Town) and described the reproducible builds work as “a real innovation”. His talk is very much worth seeing, whatever your current perspective, it might change your view on Debian.
  • Ben Hutchings explains how Secure Boot will use signed kernels via separate signature packages and how this was designed with reproducible builds in mind.

Aspiration together with the OTF CommunityLab released their report about the Reproducible Builds summit in December 2015 in Athens.

Toolchain fixes

Now that the GCC development window has been opened again, the SOURCE_DATE_EPOCH patch by Dhole and Matthias Klose to address the issue timestamps_from_cpp_macros (__DATE__ / __TIME__) has been applied upstream and will be released with GCC 7.

Following that Matthias Klose also has uploaded gcc-5/5.3.1-17 and gcc-6/6.1.1-1 to unstable with a backport of that SOURCE_DATE_EPOCH patch.

Emmanuel Bourg uploaded maven/3.3.9-4, which uses SOURCE_DATE_EPOCH for the

(SOURCE_DATE_EPOCH specification)

Other upstream changes

Alexis Bienvenüe submitted a patch to Sphinx which extends SOURCE_DATE_EPOCH support for copyright years in generated documentation.

Packages fixed

The following 12 packages have become reproducible due to changes in their build dependencies: hhvm jcsp libfann libflexdock-java libjcommon-java libswingx1-java mobile-atlas-creator not-yet-commons-ssl plexus-utils squareness svnclientadapter

The following packages have became reproducible after being fixed:

Some uploads have fixed some reproducibility issues, but not all of them:

Patches submitted that have not made their way to the archive yet:

  • #822566 against stk by Alexis Bienvenüe: sort lists of object files for reproducible linking order.
  • #822948 against shotwell by Alexis Bienvenüe: normalize tarball permissions and use locale/timezone-independent modification time.
  • #822963 against htop by Alexis Bienvenüe: use SOURCE_DATE_EPOCH for embedded copyright year, which has before already been applied in git and upstream.

Package reviews

95 reviews have been added, 15 have been updated and 129 have been removed in this week.

22 FTBFS bugs have been reported by Chris Lamb and Martin Michlmayr.

diffoscope development

  • diffoscope 52~bpo8+1 has been uploaded to jessie-backports by Mattia Rizzolo, where it is currently waiting for NEW-approval.
  • Support for the deb(5) format (uncompressed data.tar/control.tar, control.tar.xz) (Closes: #818414) has been completed by Reiner Herrmann in git.

strip-nondeterminism development

  • Support for EPUB documents has been added (to the development version in git) by Holger Levsen, to address the timestamps_in_epub issue.


Amongst the 29 interns who will work on Debian through GSoC and Outreachy there are four who will be contributing to Reproducible Builds for Debian and Free Software. We are very glad to welcome ceridwen, Satyam Zode, Scarlett Clark and Valerie Young and look forward to working together with them the coming months (and maybe beyond)!

This week’s edition was written by Reiner Herrmann and Holger Levsen and reviewed by a bunch of Reproducible builds folks on IRC.

View all weekly reports

Follow us on Twitter @ReproBuilds, Mastodon & Reddit and please consider making a donation. • Content licensed under CC BY-SA 4.0, style licensed under MIT. Templates and styles based on the Tor Styleguide. Logos and trademarks belong to their respective owners. • Patches for this website welcome via our Git repository (instructions) or via our mailing list. • Full contact info