Official and community supported build platforms for JDK 8 and 9

[Patrick Reinhart]

Hi Magnus,

> A recurring theme in the build-dev list is confusion on which platforms it is possible to build OpenJDK. Unfortunately, information about this has not been easy to gather. It has also not been clear what kind of build issues the Build Team will respond to and with what kind of urgency.
> 
> To help address this, I’ve created a publicly available wiki page: https://wiki.openjdk.java.net/display/Build/Supported+build+platforms

Nice work, that belongs on my shortcut list from now on.

> Support for building on different platforms come in two varieties: official support and community support.
> 
> Oracle defines a number of official build platforms, with carefully specified versions of operating systems, compilers and other build tools. If you report a failure to build on any of these platforms, the report will be processed with high priority from the build team in Oracle. Under normal circumstances, a build on any of these platforms will always succeed.
> 
> In addition to the official build platforms, OpenJDK can normally be built on many more platforms. For these platforms, there is no guarantee that the build will succeed. The Oracle build team can help to solve some problems encountered, but only on a best-effort basis. In addition to the Oracle build team, the OpenJDK community at large is welcome to help with making OpenJDK compile on these platforms.
> 
> The official and community supported build platforms are listed on the wiki page. Note that build support is different for different versions of the JDK. We welcome updates from the community to the list of community supported platforms. If you have succeeded (or not!) in building OpenJDK on a platform that is substantially different from the ones already listed, please document your experience in the list.

I’m able to fluently build JDK 8u and JDK 9 on Fedora 21 x64

> The list of community supported platforms on the wiki is currently much shorter than the number of platforms I expect OpenJDK to build on. Once again, please help us by filling in the wiki!
> 
> /Magnus

I would like to help improve also documentations for the community…

Patrick