statically-linked wasm jdk

lwjgl still very broken for now

Compilation Instructions:

• Use a nixOS system/vm/container. This makes dependency management very easy.
  • If you know what you are doing, list of deps is here
• git clone --depth=1 https://github.com/eaglerforge/wasmjdk.git
• cd wasmjdk
• chmod +x *.sh
• rm ./libffi/configure
• ./build_ffi.sh
• ./build_jvm.sh config
• ./build_jvm.sh
• Get LWJGL reference classes
  • In a browser, go to: https://www.lwjgl.org/customize
  • Select linux x64 as the platform, and minimal opengl es as the preset
  • In the contents tab, remove OpenAL and Assimp
  • press download button, save to the lwjgl/classpath directory.
  • the build_graphics.sh script will handle the rest
• ./build_graphics.sh (lwjgl + gl4es, you may see some errors, pretend they don't exist)
• ./build_jvm.sh skip again, this time it will include lwjgl stuff
• Finally: ./build_runner.sh, which will compile everything to a .html file

Repo Structure:

• libffi - directory containing libffi and it's binaries
• jdk - the openjdk 25 port (hardcoded patches onto unix/linux targets)
• wasmjdk_build - build output for the raw wasm JVM/JNI library
  • wasmjdk_build/include/ is just JNI headers
  • use wasmjdk_build/monolith/libjvm.a to link against. heads up, it will contain lwjgl objects by default if you build with that.
  • wasmjdk_build/runtime/lib/modules: the runtime modules file for the JVM
  • wasmjdk_build/jmod: Contains whichever .jmod files are enabled inside the build_jvm.sh script (you can edit JMOD_TARGETS)
• RELEASE: flag for compiling in debug vs release mode. 0 is debug, 1 is release
• patch_include - headerfiles for shimming unsupported platform features
• runner - the application that is built into the docs/ directory
  • runner/main.cpp - contains the entry point, and patched dlopen (important if you want to use this for your own causes)
  • runner/template/ - website template
  • runner/test/ - contains java programs that are loaded into the website. Simply follow folder structure and you can add pretty much any java program.