OpenJDK Hacking Workshop -- Building

Participants will need an x86 machine running some version of Linux
(virtualized should be ok). fedora 17/18/19 is recommended. Other
Linuxes will probably work so long as you are happy and willing to
install missing packages or upgrade package versions as determined by
the configure script.

See the download instructions for help on obtaining the OpenJDK source
code forest.

To build the standard x86 JDK8 forest:
--------------------------------------

1) Move to the location where you downloadeded the code

$ cd <base_dir_of_your_choice>

2) configure the build product you require

bash ./configure -with-debug-level=slowdebug --with-boot-jdk=/usr/lib/jvm/java-1.7.0 --with-jvm-variants=server

[ n.b. you may need to specify a different path to the boot jdk. For
  other configuration options see
  common/autoconf/generated_configure.sh (search for Optional
  Features).
]

[ if the configure script identifies packages which are missing or not
  up to the correct version then you may need to wrangle with your
  package manager at this point.
]

3) run make

$ make images

4) make libhsdis.so. you will need to ensure you have the relevant
binutils source for your Linux distribution available

$ cd hotspot/src/share/tools/hsdis
$ make BINUTILS=</path/to/your/binutils/source> LP64=1

5) copy libhsdis.so into your openjdk tree

$ cp build/linux-amd64/hsdis-amd64.so <base_dir_of_your_choice>/jdk8/build/linux-x86_64-normal-server-slowdebug/images/j2sdk-image/jre/lib/amd64


To build the aarch64 JDK8 forest:
---------------------------------

1) Move to the location where you downloadeded the code

$ cd <base_dir_of_your_choice>

2) use the pre-canned script to configure the build product n.b. it
should ensure that you have downloaded the sim and binutils code in
adjacent directories to the OpenJDK tree.

bash ./sim_configure

[ n.b. you may need to specify a different path to the boot jdk. For
  other configuration options see
  common/autoconf/generated_configure.sh (search for Optional
  Features).
]

[ if the configure script identifies packages which are missing or not
  up to the correct version then you may need to wrangle with your
  package manager at this point.
]

3) use the pre-canned script to run make. n.b. it should ensure that
the sim and hsdis code in is also built and installed in the correct
location.

$ bash sim_compile