Reproducible builds

[Joe Darcy]

On a related note, it is allowable for the javac from JDK $N and the 
javac from JDK $N+$K using --release $N to produce different class files.

-Joe

On 3/8/2022 5:16 PM, Jonathan Gibbons wrote:
> 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