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 master branch of freebsd.git. The jenkins job is running reproducible_freebsd.sh, which via ssh triggers a build on a FreeBSD 11.2 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 2020-09-24 for the branch master at commit 71e02448f using diffoscope 160.

variationfirst buildsecond build
hostname osuosl-build169-amd64 or osuosl-build170-amd64the other one
domainname is not yet varied between rebuilds of FreeBSD.
env TZTZ="/usr/share/zoneinfo/Etc/GMT+12"TZ="/usr/share/zoneinfo/Etc/GMT-14"
env LANGLANG="en_GB.UTF-8"LANG="et_EE.UTF-8"
env LC_ALLnot setLC_ALL="et_EE.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 CPUsame for both builds
/bin/sh is not yet varied between rebuilds of FreeBSD.
year, month, dateosuosl-build171-amd64: today (2020-09-24) or osuosl-build172-amd64: 398 days in the future (2021-10-27)the other one
year, month, datetoday (2020-09-24)the 2nd build is done with the build node set 1 year, 1 month and 1 day in the future
hour, minutehour and minute will vary between two buildsadditionally the "future build" also runs 6h and 23min ahead
filesystem of the build directoryufssame for both builds
everything else...is likely the same. There will be more variations in the wild.

Artifacts for freebsd_master_git71e02448f
freebsd_master_git71e02448f failed to build from source.

commit 71e02448ffb1a8a0e708f3d6f0fb87c356f8e48d
Author: asomers 
Date:   Thu Sep 24 21:42:44 2020 +0000

    lib/libc/tests/iconv: raise WARNS to 6
    
    MFC after:      2 weeks