Reproducible builds

Jonathan Gibbons jonathan.gibbons at oracle.com
Wed Mar 9 01:16:57 UTC 2022


Yes, not only it is true for javac, but it is an aspiration for builds 
of OpenJDK as a whole.

In general, the common problem is timestamps, and for those tools that 
use timestamps, there is a precedent to support a `--date` option.  This 
includes jar, javadoc, jlink etc, but not javac, because javac does not 
put timestamps in generated files.

-- Jon


On 3/8/22 2:09 PM, Richard Bair wrote:
> Hi!
>
> I am wondering whether it is a stated goal or non-legally binding guarantee that the compilation of a program from the same build of OpenJDK will always produce the same binary output? I understand that at the specification level there is no guarantee of reproducible builds, and that different JDKs from different providers may very well produce non-identical binaries. Is there any indeterminism in a run from javac that would produce different binary artifacts?
>
> Thanks
> Richard


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