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 NetBSD is an effort to apply this to NetBSD. Thus each NetBSD target is build twice, with a few varitations added and then the resulting files from the two builds are 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 netbsd.git. The jenkins job is running reproducible_netbsd.sh in a Debian environment and this script is solely responsible for creating this page. Feel invited to join #debian-reproducible (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 NetBSD, you might find something easy to contribute.
Thanks to Profitbricks for donating the virtual machines this is running on!
54 (100.0%) out of 54 built NetBSD files were reproducible in our test setup ! These tests were last run on 2017-05-24 for version dc782c3 with MKREPRO=yes and MKREPRO_TIMESTAMP=1495639791 and were compared using diffoscope 82.
| variation | first build | second build |
|---|---|---|
| hostname | is not yet varied between rebuilds of NetBSD. | |
| domainname | is not yet varied between rebuilds of NetBSD. | |
| env CAPTURE_ENVIRONMENT | not set | CAPTURE_ENVIRONMENT="I capture the environment" |
| env TZ | TZ="/usr/share/zoneinfo/Etc/GMT+12" | TZ="/usr/share/zoneinfo/Etc/GMT-14" |
| env LANG | LANG="en_GB.UTF-8" | LANG="fr_CH.UTF-8" |
| env LC_ALL | not set | LC_ALL="fr_CH.UTF-8" |
| env PATH | PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:" | PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path" |
| env USER | is not yet varied between rebuilds of NetBSD. | |
| uid | is not yet varied between rebuilds of NetBSD. | |
| gid | is not yet varied between rebuilds of NetBSD. | |
| UTS namespace | is not yet varied between rebuilds of NetBSD. | |
| kernel version, modified using /usr/bin/linux64 --uname-2.6 | Linux 3.16.0-4-amd64 | Linux 2.6.56-4-amd64 |
| umask | 0022 | 0002 |
| CPU type | AMD Opteron 62xx class CPU | same for both builds |
| /bin/sh | is not yet varied between rebuilds of NetBSD. | |
| year, month, date | today (2017-05-24) | same for both builds (currently, work in progress) |
| hour, minute | hour and minute will probably vary between two builds... | but this is not enforced systematically... (currently, work in progress) |
| Filesystem | tmpfs | same for both builds (currently, this could be varied using disorderfs) |
| everything else... | is likely the same. There will be more variations in the wild. | |
Reproducible artifacts for amd64 |
|---|
 binary/kernel/netbsd-GENERIC.gz (497555b9d9ef1546ee10b442a1aa5a496fec240eddd69421008e172633439e79, 8121K) is reproducible. |
| binary/kernel/netbsd-GENERIC.symbols.gz (660860a7540b798874b75999808799d5284034e7df1f2cb168ab3da75e04432c, 407K) is reproducible. |
| binary/kernel/netbsd-INSTALL.gz (cbdf14b98b67cc86df2a8242cfd0fb071b09de6c0998d347a4e0e5fec9de0f72, 7527K) is reproducible. |
| binary/kernel/netbsd-INSTALL.symbols.gz (1a424310058e634be7fb0c4eaf627fa61a48e2af4a472ea360bc746e9f43aea3, 358K) is reproducible. |
| binary/kernel/netbsd-INSTALL_XEN3_DOMU.gz (bd5193438c79cad17a1233059886639fc8cac4e1eacf96ea20567c2bf4dbca8c, 3794K) is reproducible. |
| binary/kernel/netbsd-XEN3_DOM0.gz (dd95cdc8116e8749a9ec9973578e7c9b4256a7017863481a29fe27d89173ac3c, 5846K) is reproducible. |
| binary/kernel/netbsd-XEN3_DOMU.gz (c554ea612b33e44b80658708555ff08bc2607d442ef47086dd5502bef2186676, 2563K) is reproducible. |
| binary/sets/base.tgz (c90ebde46d7ee383ed27dd955c5d8c278bfa3511d810c3ca9d2ecbe3f5c05ba1, 64M) is reproducible. |
| binary/sets/comp.tgz (68c44cd0c8fd50d8e8d2e60ff804004364b8d83208a95b14cc7a3ba576d86a75, 128M) is reproducible. |
| binary/sets/etc.tgz (53736d7cb348edcc11f1a8394c058cb86e6a73f3fe772a864b251f7794dc0874, 614K) is reproducible. |
| binary/sets/games.tgz (621b44b9b5e1112bb9aa9ab4fbda0809cf3d2ea8aebe1c5d07e0eaf6a3917773, 3253K) is reproducible. |
| binary/sets/kern-GENERIC.tgz (74c1ee363b8b5f3b030b41037dabfc1d90cb1e9a680b54ea69594cce72dad5ea, 8122K) is reproducible. |
| binary/sets/kern-XEN3_DOM0.tgz (c9a5cb9f0de39832afc6dcf7ff363bc75368c56051b7da12a87b1d9a7639607d, 5846K) is reproducible. |
| binary/sets/kern-XEN3_DOMU.tgz (c22982f525cbef8b334704ae779eed5ea3a1f20feee61a2ca465bbc4258997de, 2564K) is reproducible. |
| binary/sets/man.tgz (7f77b9bc8dbff814a04b6f9f62589f38fcc8b29615c642bfb6cc985ff3445b20, 11327K) is reproducible. |
| binary/sets/misc.tgz (471eafa644d81cb8d15ef249fc4475ee9b219596b513770c14ee30978b218275, 5215K) is reproducible. |
| binary/sets/modules.tgz (b358fbbf2d324a351975f19bb048e23be34332f147ee546150eb4dfecad179c9, 13757K) is reproducible. |
| binary/sets/tests.tgz (bfcd42a2f41664207479e1e2f98f4534921523540723b1fd62430def2be0ded9, 8120K) is reproducible. |
| binary/sets/text.tgz (0a5433dede9080b2bd5893dd2111419b40727ceef55a0967096eb894433b7075, 2887K) is reproducible. |
| installation/cdrom/boot-com.iso (d2e3a4939394efa930a51ddd2a9f987d1a8ab6bdf5655cabc648865c38f33693, 215M) is reproducible. |
| installation/cdrom/boot.iso (f7525123b57ea52062e164611cfcd9c7b5cde19661baedef1f834370496a4ff1, 215M) is reproducible. |
| installation/miniroot/cgdroot.kmod (62ec1a8711948bb507fccfe1b3ff39539e62984690f90e97c4f8b4c989d9beeb, 1104K) is reproducible. |
| installation/miniroot/miniroot.kmod (6aaa491fef9919003dbe0d258c8858ad64f2f91ae96873756ece4228f2092fb0, 1229K) is reproducible. |
| installation/misc/pxeboot_ia32.bin (c37143568560ac0ec47188529b41b43129dba9af02a51d6b7e2241c4369ce598, 52K) is reproducible. |
| INSTALL.html (dc0bc34e9180ac277d27fd0de2ca8e43e2c474d401dbdf67c1ef2a2a2f92a85a, 132K) is reproducible. |
| INSTALL.more (6fd895041ad81c4b2136a9a684882cf1e3684ccb9661f33e1329a462f17d084d, 103K) is reproducible. |
| INSTALL.ps (8cad1e46917f91ef8a3730dd287b6bec6d4eeaad0cdcac882473dede1236f0bb, 153K) is reproducible. |
| INSTALL.txt (5fa2b23783a7ef62a4c042be5774be68769161a214032ad148a6bf06fad5ee15, 96K) is reproducible. |
Reproducible artifacts for sparc64 |
|---|
| binary/kernel/netbsd-GENERIC.gz (f1cf4de6a632ef6957e69cfd648cbe76f39e0552efa618cce0cc8e83d15e5854, 5281K) is reproducible. |
| binary/kernel/netbsd-GENERIC.UP.gz (7ed9c549f33213132aca91bfd53d7371e2d585865606da16a00e9497b95c3df8, 5267K) is reproducible. |
| binary/kernel/netbsd-INSTALL.gz (046625c11e18dda230103d5e0d11bc5c9ab7ef9ea43bd8f9a681dde7c695ff76, 6276K) is reproducible. |
| binary/kernel/netbsd-INSTALL.symbols.gz (5a12cffac4bb0eb8cda83039b287e11755b3a48e5d504d672eebcf36f8d998b1, 240K) is reproducible. |
| binary/sets/base.tgz (382f50b544fef5b16a3c2203dd1461f7a3d2ca3b044aa0ab3a9339c7cec015f0, 63M) is reproducible. |
| binary/sets/comp.tgz (ef46bd82e5911d2a0bd7c4bc86ea9b23613933ead84de45e6d2c1f914d620cf8, 123M) is reproducible. |
| binary/sets/etc.tgz (5283ca2348679e05c29d0921f8c330097db112d214a6188bdb072f5782bbaae1, 614K) is reproducible. |
| binary/sets/games.tgz (27d929e90bb6f0f304a2dde6db86a105f70635074d2d0def3b35878003709091, 3400K) is reproducible. |
| binary/sets/kern-GENERIC.tgz (5a9233f795d06a71e654efb31699fcd9cc2fe29081b0f99ff7ffb2fa20284bbd, 5281K) is reproducible. |
| binary/sets/kern-GENERIC.UP.tgz (d8803c7a312c62d0cc863f2f0c7ab058f45a8aae02670dda53f7a4746a051284, 5267K) is reproducible. |
| binary/sets/man.tgz (24870997ee4d3cb956ee68836e97e424b07464d4f333feb43895af306bf5f372, 11237K) is reproducible. |
| binary/sets/misc.tgz (471eafa644d81cb8d15ef249fc4475ee9b219596b513770c14ee30978b218275, 5215K) is reproducible. |
| binary/sets/modules.tgz (4c7a9e5a13f6de32fa4d855ce75bc90eadac4fe1c64fdde77987d84622418f7c, 2277K) is reproducible. |
| binary/sets/tests.tgz (58ab2dc81d01ab3020a1be0907e3d2d1a72b6d3a4829a804f1e4fed80fca192d, 7895K) is reproducible. |
| binary/sets/text.tgz (4ee5088f1f7fdee398289cdc20cdabec053a82d89c6de6562bb167fab8540408, 3018K) is reproducible. |
| installation/miniroot/miniroot.fs.gz (703f9fcafd1af272b635944d970e5b73e7764a4fa59712e6340ba25ea64cebc4, 7252K) is reproducible. |
| installation/misc/bootblk (99b37fbde6cf6d795adf645a7f820eacc7a7f36e4c30eb2d5315b0ff113af74a, 7K) is reproducible. |
| installation/misc/boot.fs.gz (354f412efbebd3e13e854f2293ad5d942d294d426edcd022a61d58deff894c06, 57K) is reproducible. |
| installation/misc/installboot (2882d5544451ea97b58730b235a1ee1f7aeee904282ffb81619094ee1fabd87e, 97K) is reproducible. |
| installation/misc/instfs.tgz (ee52e37cc2b0c46bccb6c426953765e945e44bb2fcf4e21f3c464ca21f91b271, 1981K) is reproducible. |
| installation/misc/ofwboot (6c71d231c78fec8a71fb45b809b9da299b45c059de5bafdcc1f0ab6a0bf0385b, 109K) is reproducible. |
| installation/netboot/ofwboot.net (6c71d231c78fec8a71fb45b809b9da299b45c059de5bafdcc1f0ab6a0bf0385b, 109K) is reproducible. |
| INSTALL.html (b040c7e6c3eafb69ddda932d0f397412b6eec2ee27c6263f94b0f7a5e10afdfb, 186K) is reproducible. |
| INSTALL.more (401b056de5095435374c3bad66971f860332e37527173f34f39bb4e4ff1b88c8, 146K) is reproducible. |
| INSTALL.ps (b0acbf2dcb2063db3922dc421873510121eb2b71c13eb684a38b8d73d4d81d06, 216K) is reproducible. |
| INSTALL.txt (a3793c99553436464507e2fa05aa86109617fc96838bc884090413881000ef45, 137K) is reproducible. |
commit dc782c37b0b2b9215e1a26ade9c69f07383e77da Author: christosDate: Wed May 24 15:29:51 2017 +0000 give it more time.