openjdk_11 [FreeBSD WIKI]

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openjdk-jdk11u ( openjdk-jdk12u, openjdk-jdk13u)

is a joint venture of %%FreeBSD%% & %%OpenBSD%%,

that's why it's called **bsd-port**.

While actually  ' wanted to report on (too many) details here, 'just discovering
that it will be more profitable for you to pick up the details
where they are being processed:

You will get to know a very open-minded and friendly,
extremely experienced and very detail-focused team here :

https://github.com/battleblow/openjdk-jdk11u

while mainline openjdk is a mercurial project ,
the BSD-port is hosted as a [[/GitHub|GitHub]]-fork of %%AdoptOpenJDK%% .

there`s also a sub-branch for %%NetBSD%% and you will even find macOS related things @battleblow.

openjdk is not self-contained, which means that you'll always need to create  an initial
so called **bootstrap-jdk** if you want to port to a new OS/platform/architecture.
the bootstrap-jdk can be from the same jdk-version or from the one before,
means: you cannot bootstrap from openjdk8 to openjdk11, you`ll need at least version 10.
But there are **special-tricks** to create your needed bootstrap-jdk .
While one team member made it via qemu, another made it via NFS and yet another went all the way
back from 8,9,10, to 11 with tux-ports....
since we now have reached 11 as supported version , the NFS-method should be the most interesting .
openjdk Makefile  will automatically detect an installed compatible (system-linked), bootstrappable jdk.
But what is automatic? If not system-linked you can choose your preferred bootstrap-version
in the configure-file.
1st make yourself familiar with openjdk-configuration optional and necessary configure-arguments .

https://hg.openjdk.java.net/jdk/jdk11/raw-file/tip/doc/building.html#build-tools-requirements

While it is clear, of course, that we all know the java programming language, as a port-developer you will not be surprised that you are usually in the hotspot directory for a jdk-port (which is not a java program) ,
So don't be surprised if you (please carefully) will get in touch with e.g. asm-code instead of java-code ;-)

if you haven't fallen asleep while reading or maybe already knew that anyway :-),
start now boostrapping to your new architecture/platform/OS
and add/remove/test/link features in your configure- file..

Please first send general questions / suggestions to:

freebsd-java@freebsd.org

while you can make a git- PR if you have new features available
and while you can send issues/feature-requests described in technical detail of course here :

https://github.com/battleblow/openjdk-jdk11u/issues

We look forward to getting to know you