Building your own JDK in 10 steps
summary
Steps show how to clone OpenJDK Mercurial branches on an Ubuntu VM, install hg, run configure and use make to run make images and produce a real JDK image. Each branch downloads about 2.5GB per branch and produces roughly 6–6.5GB output, so expect around 20–30 minutes per build and tens of gigabytes for multiple branches. The produced build runs, supports Amber preview features with --enable-preview, and compiles records that generate equals/toString and enforce constructor validation.
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chapters (13)
- 0:00Intro
- 0:37Why build JDK
- 1:35Nonexisting JDK
- 6:00How it works
- 8:31Installing mercurial
- 9:17Choosing a branch
- 10:45Downloading source code
- 11:49Finding your branch
- 13:31Running configure
- 15:40Running compile
- 16:17Make images
- 19:56Demo
- 26:30Wrapping up
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