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Make build reproducible #485

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jelly opened this issue Dec 7, 2019 · 1 comment
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Make build reproducible #485

jelly opened this issue Dec 7, 2019 · 1 comment

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@jelly
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jelly commented Dec 7, 2019

The current libcec cannot be built twice on different machines since it records the buildtime in the binary. A solution is to honour SOURCE_DATE_EPOCH which is described on the reproducible builds website https://reproducible-builds.org/
bmwiedemann added a commit to bmwiedemann/libcec that referenced this issue Dec 17, 2019
@bmwiedemann
Use cmake TIMESTAMP function
5fe1079 
to be more portable
and to allow for reproducible builds

See https://reproducible-builds.org/ for why this matters.

Also consistently use ISO 8601 date format to be understood everywhere.

Fixes Pulse-Eight#485
@bmwiedemann bmwiedemann mentioned this issue Dec 17, 2019
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@bmwiedemann
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in openSUSE we workaround it with
https://github.com/bmwiedemann/openSUSE/blob/master/packages/libc/libcec/libcec-build-compare.patch

but since it is cmake, one can use the TIMESTAMP macro to be more portable and provide reproducible builds at the same time. See #487 for that.

There are also build user, host and kernel version.

opdenkamp added a commit that referenced this issue Feb 14, 2025
@opdenkamp
Use cmake TIMESTAMP function to be more portable
1cd2d1b 
and to allow for reproducible builds

See https://reproducible-builds.org/ for why this matters.

Also consistently use ISO 8601 date format to be understood everywhere.

Based on bmwiedemann@5fe1079dac569870085cde342a07df7909aad6f0x

Fixes #485
Closes #553
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Use cmake TIMESTAMP function bmwiedemann/libcec
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@jelly @bmwiedemann