Le mardi 25 août 2015 à 12:20 +0200, Andreas Bießmann a écrit :
On 08/25/2015 11:55 AM, Vagrant Cascadian wrote:
On 2015-08-25, Andreas Bießmann wrote:
On 07/28/2015 05:00 PM, Tom Rini wrote:
On Sun, Jul 26, 2015 at 06:48:15PM +0200, Paul Kocialkowski wrote:
In order to achieve reproducible builds in U-Boot, timestamps that are defined at build-time have to be somewhat eliminated. The SOURCE_DATE_EPOCH environment variable allows setting a fixed value for those timestamps.
Simply by setting SOURCE_DATE_EPOCH to a fixed value, a number of targets can be built reproducibly. This is the case for e.g. sunxi devices.
However, some other devices might need some more tweaks, especially regarding the image generation tools.
Signed-off-by: Paul Kocialkowski contact@paulk.fr
Applied to u-boot/master, thanks!
This commit breaks build on non GNU hosts (like OS X and persumably other *BSD hosts). Before, those hosts where supported, so for me this has to be fixed for 2015.10
We need a) some mechanism to search for the GNU date variant or b) some wrapper to provide the correct output on those host machines.
I vote for a), it is acceptable to have the GNU date available but we should error on 'no GNU date available'. Furthermore we need to have the date command exchangeable by e.g. gdate, gnudate, ... maybe with full path.
There was a proposed patch which only uses the GNU date extensions if SOURCE_DATE_EPOCH environment variable is set, would this sufficiently address your concerns, at least for the short term?
Message-Id: 1438337042-30762-1-git-send-email-judge.packham@gmail.com http://lists.denx.de/pipermail/u-boot/2015-August/221429.html
thanks for the pointer, normal builds work with that change.
I think we should get that patch merged so that it doesn't affect regular builds on non-GNU hosts. It is also relevant for the purpose it serves initially, too.