Dart Dynamic Import Library

This is an attempt / POC to build the Dart VM into a dynamic library, importable in any platform Dart supports.

Eventual support

The hope is that the the dynamic library will eventually support the following targets:

• A "Fully Featured" .dll / .so that supports booting Dart in different configurations:
  • Boot (or not) the service and kernel isolates
  • Support Dart Source Compilation and / or Kernel Isolates
  • Support "AOT only" mode? (aka, just the runtime)
• A JIT Only .dll / .so
• A AOT Only .dll / .so (aka, just the runtime)

Additionally we may have a static target that uses the same interface as the dynamic library, so the VM can be embedded on platforms that don't support dynamic linking.

I also hope to support all platforms that Dart currently supports, plus a few extra.

Current Progress

A very, very simple Dart script works.

Using

TODO:

Building

Prerequisets

You need

• git
• All the things to get Dart source - https://github.com/dart-lang/sdk/wiki/Building#source
• C++ build tools for your platform (Visual Studio, XCode, gcc, etc)
• CMake

Contributing

TODO:

What I Did

This section is as much for my benefit as for yours. Eventually, I hope to make a script that will do most of this.

• Modify the BUILD.gn files to add a libdart target. This is done by applying the patch in ./dart_sdk.patch
• Make sure all correct environment variables are set
  • On Windows, these are set with the setup_env.ps1 script. Specifically, you need to set GYP_MSVS_OVERRIDE_PATH, GYP_MSVS_VERSION, and DEPOT_TOOLS_WIN_TOOLCHAIN=0
• Builds libdart with:

  # On windows, you will need to add `python` in front
  ./tools/build.py --no-goma -m release libdart

• Revert the changes made to build files to leave a clean copy of the dart-sdk (this makes updating easier)
• Build with CMake:

cmake -B ./.build .
cmake --build ./.build

Updating the dart-sdk

• Make sure environment variables are set (setup_env.ps1)
• From dart-sdk/sdk:
  • git checkout tags/[version]
  • gclient sync -D
  • reapply dart_sdk.patch (git apply ../../dart_sdk.patch)
  • python ./tools/build.py --no-goma -m release libdart