Compiling module descriptors is not reproducible?

[Behrang]

Best regards,
Behrang Saeedzadeh

On 19 May 2018 at 22:30, Remi Forax <forax at univ-mlv.fr> wrote:

> ----- Mail original -----
> > De: "Alan Bateman" <Alan.Bateman at oracle.com>
> > À: "org openjdk" <org.openjdk at io7m.com>, "jigsaw-dev" <
> jigsaw-dev at openjdk.java.net>
> > Envoyé: Samedi 19 Mai 2018 13:26:55
> > Objet: Re: Compiling module descriptors is not reproducible?
>
> > On 19/05/2018 10:18, Mark Raynsford wrote:
> >> Hello!
> >>
> >> I've been interested for a while in making all of my software builds
> >> reproducible [0]. I don't think there's ever been any kind of
> >> written guarantee that the output of javac will be completely
> >> deterministic, but to date it seems like it actually has been. However,
> >> I was a bit disappointed today to find that the output of one of the
> >> builds at AdoptOpenJDK [1] seems to be inserting compiler version
> >> information into compiled module descriptors. It doesn't seem to be
> >> doing this for any other class files.
> > The requires table in the Module attribute can be used by compilers to
> > record version information about dependences. javac does record the
> > version information, I don't know if there is a way to disable that.
>
> It seems there is no way:
> http://hg.openjdk.java.net/jdk/jdk/file/5ec7380f671d/src/
> jdk.compiler/share/classes/com/sun/tools/javac/jvm/ClassWriter.java#l986
>
> > In any case, I assume your question will be partly answered by looking at
> > the output of `java --list-modules` on the different builds. If you
> > download OpenJDK builds from jdk.java.net/10 then you should see that
> > the standard and JDK-specific modules all report their version string as
> > "10" or "10.0.1" as they have been built with configure options that
> > make it so. At a guess, your mail may have included the output from an
> > exploded (as opposed to images) build.
> >
> > -Alan
>
> Rémi
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.openjdk.java.net/pipermail/compiler-dev/attachments/20180519/223c0f9b/attachment.html>