Subject: Linux-libre kernel does not build deterministically
From: [email-masked] (Ludovic Courtès)
To: [email-masked]
Date: Tue, 19 Jul 2016 19:22:29 +0200
List-Id: <debbugs-submit.debbugs.gnu.org>

As of version 4.6.4, Linux-libre does not build reproducibly:

--8<---------------cut here---------------start------------->8---
$ guix challenge linux-libre
/gnu/store/wkdnd1dcgljr0jxmd3li8j0qsr2zwrci-linux-libre-4.6.4 contents differ:
  local hash: 1py214sd42qcq8l429m4zf4aibp8rl68kpkrzqi1nn65vnbxsx11
  https://hydra.gnu.org/nar/wkdnd1dcgljr0jxmd3li8j0qsr2zwrci-linux-libre-4.6.4: 19hsdsjy5i9nfc1g28s074znzimzhylgkdpwz435j301sn9pxxp9
$ wget -q -O - https://hydra.gnu.org/nar/wkdnd1dcgljr0jxmd3li8j0qsr2zwrci-linux-libre-4.6.4 | bunzip2 | guix archive -x t
$ diff -ur --no-dereference /gnu/store/wkdnd1dcgljr0jxmd3li8j0qsr2zwrci-linux-libre-4.6.4 /tmp/t
Binary files /gnu/store/wkdnd1dcgljr0jxmd3li8j0qsr2zwrci-linux-libre-4.6.4/bzImage and /tmp/t/bzImage differ
--8<---------------cut here---------------end--------------->8---

Apparently people are working on it:
<https://wiki.debian.org/SameKernel>.

Ludo’.