Thanks Alan, So different gcc, glibc, Xcode,.. agree, they need to be the same for identical bits. However, at the moment using the same toolchains, if you do a standard product build, and then a bootcycle build, of the same source, jrt-fs.jar will differ. I'll do some investigation of the make files to see if a "Build JDK" rebuild of jrt-fs.jar is feasible.
Cheers Andrew On Tue, Sep 19, 2023 at 5:42 PM Alan Bateman <alan.bate...@oracle.com> wrote: > On 18/09/2023 14:51, Andrew Leonard wrote: > > Thanks for the clarification Alan. > > > > To ensure the reproducibility of the whole JDK image regardless of the > > specific bootjdk used, would it make sense once the "Build JDK" has > > been built, we re-build jrt-fs.jar again using the "Build JDK" ? Thus > > jrt-fs.jar will be consistent with the rest of the image in terms of > > what it is compiled with. > > > > The boot JDK will be JDK N-1, or the newly built JDK in the case of boot > cycle builds. It seems a bit of a stretch to have builds using different > tool chains to produce identical bits but maybe you mean something else. > > In any case, for jrt-fs.jar the important thing is that they are > compiled to --release 8 (that might rev at some points) so that > IDEs/tools can open a target run-time image as a file system and access > the classes/resources. > > -Alan. > >
