tree bf38ed05f93a7eac50b610a454203d995c4220f0
parent 03dadba89882b90e671a0942311e1588b37fc918
author Jan Schär <jan@monogon.tech> 1752056001 +0000
committer Jan Schär <jan@monogon.tech> 1752145872 +0000

third_party/linux: make build reproducible

Linux includes a timestamp, username and hostname in /proc/version and
other places. We need to set these to a fixed value to make the build
reproducible. For the timestamp, we can use the modified date of any
file in the source archive; all files in the archive have the same
timestamp.

See Linux Documentation/kbuild/reproducible-builds.rst

Change-Id: If50bb5a8ee73e5bc37e95a5d38e7ee87d85518a5
Reviewed-on: https://review.monogon.dev/c/monogon/+/4417
Tested-by: Jenkins CI
Reviewed-by: Lorenz Brun <lorenz@monogon.tech>