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[DOC] Split building docs for modular GC

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Peter Zhu 2025-06-09 16:50:06 -04:00
parent 837699e160
commit 6184793ea9
Notes: git 2025-06-10 02:30:55 +00:00 
Merged: https://github.com/ruby/ruby/pull/13566
1 changed files with 7 additions and 2 deletions
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gc/README.md
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@ -15,12 +15,17 @@ Two GC implementations are included in Ruby:
> [!IMPORTANT]
> Ruby's modular GC feature is experimental and subject to change. There may be bugs or performance impacts. Use at your own risk.
### Building Ruby with Modular GC
1. Configure Ruby with the `--with-modular-gc=<dir>` option, where `dir` is the directory you want to place the built GC libraries into.
2. Build Ruby as usual.
3. Build your desired GC implementation with `make install-modular-gc MODULAR_GC=<impl>`. This will build the GC implementation and place the built library into the `dir` specified in step 1. `impl` can be one of:
### Building GC implementations shipped with Ruby
1. Build your desired GC implementation with `make install-modular-gc MODULAR_GC=<impl>`. This will build the GC implementation and place the built library into the `dir` specified in step 1. `impl` can be one of:
- `default`: The default GC that Ruby ships with.
- `mmtk`: The GC that uses [MMTk](https://www.mmtk.io/) as the back-end. See Ruby-specific details in the [ruby/mmtk](https://github.com/ruby/mmtk) repository.
4. Run your desired GC implementation by setting the `RUBY_GC_LIBRARY=<lib>` environment variable, where `lib` could be `default`, `mmtk`, or your own implementation (as long as you place it in the `dir` specified in step 1).
2. Run your desired GC implementation by setting the `RUBY_GC_LIBRARY=<lib>` environment variable, where `lib` could be `default`, `mmtk`, or your own implementation (as long as you place it in the `dir` specified in step 1).
## Modular GC API