Huh. I thought <@U09M563C7> said I should build tw...
# cores
seph
12/17/2019, 6:00 PM
Huh. I thought @theopolis said I should build twice and compare checksums
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Stefano Bonicatti
12/17/2019, 6:07 PMWell if it does it's "luck".
Meaning, for instance any usage of
___DATE______TIME_____FILE__Stefano Bonicatti
12/17/2019, 6:08 PMThere are ways to force known values or fixed seeds for lto (which though ok, for Linux/macOS case we are not using)
Stefano Bonicatti
12/17/2019, 6:08 PMbut we are not doing them
Stefano Bonicatti
12/17/2019, 6:09 PMalso compiling on a different different path can change the checksum
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theopolis
12/17/2019, 10:51 PM
Agree that maintaining reproducibility is hard and needs a test in the CI. We had this with Jenkins -- but we do have a reproducible build, I at least test this on Linux manually when building packages.
theopolis
12/17/2019, 10:53 PM
I might be able to improve my testing -- it might not removal all artifacts
theopolis
12/17/2019, 10:59 PM
^ it only removes the source/build directories and starts again, mostly assuring there are not dirty changes. Never used it as a way to confirm my VMs were clean of malfeasance
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seph
12/18/2019, 12:20 AM
Seems weird that my builds i.on different VMs did t march
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Stefano Bonicatti
12/18/2019, 12:35 AMdifferent VMs how?
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seph
12/18/2019, 12:42 AM
I started 2 VMs in gcloud. Then I ran the steps in parallel. Same OS image, but otherwise, different
seph
12/18/2019, 12:53 AM
I’m not sure this is really actionable?
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theopolis
12/18/2019, 6:20 PM
yeah, unfortunately, not right now
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