Reproducible builds enable anyone to reproduce bit by bit identical binary packages from a given source, so that anyone can verify that a given binary derived from the source it was said to be derived. There is more information about reproducible builds on the Debian wiki and on https://reproducible-builds.org. These pages explain in more depth why this is useful, what common issues exist and which workarounds and solutions are known.
Reproducible FreeBSD is an effort to apply this to FreeBSD. Thus FreeBSD is build twice, with a few variations added and then the resulting filesystems from the two builds are put into a compressed tar archive, which is finally compared using diffoscope. Please note that the toolchain is not varied at all as the rebuild happens on exactly the same system. More variations are expected to be seen in the wild.
There is a weekly run jenkins job to test the
release/10.3.0 branch of freebsd.git. The jenkins job is running reproducible_freebsd.sh, which via ssh triggers a build on a FreeBSD 10.3 system and this script is solely responsible for creating this page. Feel invited to join
#reproducible-builds (on irc.oftc.net) to request job runs whenever sensible. Patches and other feedback are very much appreciated - if you want to help, please start by looking at the ToDo list for FreeBSD, you might find something easy to contribute.
Thanks to Profitbricks for donating the virtual machines this is running on!
0 (0%) out of 0 FreeBSD files were reproducible in our test setup . These tests were last run on 2018-07-12 for the branch master at commit 9a3371344 using diffoscope 99.
|variation||first build||second build|
|hostname||profitbricks-build3-amd64 or profitbricks-build4-amd64||the other one|
|domainname||is not yet varied between rebuilds of FreeBSD.|
|env LC_ALL||not set||LC_ALL="fr_CH.UTF-8"|
|env PATH||is not yet varied between rebuilds of FreeBSD.|
|env USER||is not yet varied between rebuilds of FreeBSD.|
|uid||is not yet varied between rebuilds of FreeBSD.|
|gid||is not yet varied between rebuilds of FreeBSD.|
|FreeBSD kernel version||is not yet varied between rebuilds of FreeBSD.|
|umask||is not yet varied between rebuilds of FreeBSD.|
|CPU type||AMD Opteron 62xx class CPU||same for both builds|
|/bin/sh||is not yet varied between rebuilds of FreeBSD.|
|year, month, date||profitbricks-build3-amd64: today (2018-07-12) or profitbricks-build4-amd64: 398 days in the future (2019-08-14)||the other one|
|year, month, date||today (2018-07-12)||the 2nd build is done with the build node set 1 year, 1 month and 1 day in the future|
|hour, minute||hour and minute will vary between two builds||additionally the "future build" also runs 6h and 23min ahead|
|filesystem of the build directory||ufs||same for both builds|
|everything else...||is likely the same. There will be more variations in the wild.|
|Artifacts for |
|freebsd_master_git9a3371344 failed to build from source.|
commit 9a3371344fc75a1ea0f41705181f885ff6b2636e Author: mjg
Date: Thu Jul 12 22:48:18 2018 +0000 fd: stop passing M_ZERO to uma_zalloc The optimisation seen with malloc cannot be used here as zone sizes are now known at compilation. Thus bzero by hand to get the optimisation instead.