Why not starting with the easiest part of your proposal which you've sketched in the last paragraph and just remove the "only known non-POSIX-compliant OS".
I'm preparing a webrev if you don't mind:) Rgards, Volker On Wed, Apr 1, 2015 at 10:33 AM, Magnus Ihse Bursie <magnus.ihse.bur...@oracle.com> wrote: > The build system currently uses make to build OpenJDK. This is a technology > that has been around for decades, and in places this legacy clearly shows. > > An alternative build tool, Ant, is based on cutting-edge technology. Compared > to the native GNU Make, Ant is based on Java™ technology, which makes > portability issues a thing of the past. Ant is also directed using modern XML > systems, with well-defined tags, compared to the aged and idiosyncratic > Makefile syntax. > > The Build Team has therefore decided to rewrite the current build system from > scratch in Ant. The old Makefiles will be put in maintenance mode while the > new Ant scripts are being developed. To facilitate a speedy switch, all new > build enhancements must be expressed in Ant logic, starting today. No > modifications in the old Makefiles will be accepted by the Build Team. > > To increase the robustness of the code base, the new build system will > automatically check the integrity of all source code files before > compilation. Each source file therefore must be accompanied by a Integrity > Manifest (.Ingeg_Manif.xml). For instance, the file Object.java would have an > Object.java.Integ_Manif.xml. This is a simple xml file, describing the > purpose of the source code file, and a log of mercurial changeset id:s. An > example file could looks like this: > > <manifest xmlns="http://openjdk.java.net/ns/manifest/integrity/1";> > <type>net.java.openjdk.build.ant.manifest.integrity</type> > <artifacts> > <artifact> > <source-code-descriptor> > <filename>Object.java</filename> > <description>Class Object is the root of the class > hierarchy.</description> > </source-code-descriptor> > </artifact> > </artifacts> > <integrity> > <revision-control> > <committed-change> > <changeid>541a8cef4e0d</changeid> > <revision-control-system>mercurial</revision-control-system> > </committed-change> > <committed-change> > <changeid>458adf31ad5b</changeid> > <revision-control-system>mercurial</revision-control-system> > </committed-change> > <committed-change> > <changeid>0846eddb56d5</changeid> > <revision-control-system>mercurial</revision-control-system> > </committed-change> > </revision-control> > </integrity> > </manifest> > > Each time a new version of the file is committed to the mercurial repo, the > developer just has to add a new committed-change stanza to the block in the > .Ingeg_Manif.xml file. Since the changeset ID is not known before hand, the > Integrity Manifest file must be updated in a subsequent commit. > > But fear not! To assist developers in preserving the integrity of the source > files, an addition to jcheck has been developed. If the subsequent commit > does not properly describe the previous changeset ID, the original changeset > will be automatically reverted, so no untracked changes will be stored > permanently in the revision control system. > > Finally, to fully utilize the promise of portability that the Ant and Java™ > technology brings, platforms with portability issues will be removed from the > supported platform matrix. Currently, this only includes non-POSIX-compliant > operating systems, since these have been known to cause various platform > issues in the build system. The only known non-POSIX-compliant OS that the > OpenJDK build system currently supports is the Windows OS family, so this > reduction in support is hopefully not too burdensome. > > These changes will take immediate effect of today, April 1 2015. > > That's all for today, folks! :-) > > /Magnus
