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Variant of Chez Scheme extended for Racket

This variant of Chez Scheme is extended to support the implementation of Racket. It may be useful on platforms that are not yet supported by upstream Chez Scheme.

Main additions to Chez Scheme in the Racket variant:

  • AArch64 and RV64G (RISC-V) code generation

  • Portable bytecode (pb) mode, which is mainly useful for bootstrapping a build on any platform, but can also be used on platforms without native-code generation, compiled via Emscripten, linked with libffi, or used with bytecode partially compiled to C

  • Unboxed floating-point arithmetic and flvectors

  • Faster multiplication and division for large exact numbers

  • Type reconstruction during optimization (especially for safe code)

  • Continuation marks

  • Parallel garbage collection, in-place garbage collection for old-generation objects (instead of always copying), and reachability-based memory accounting

  • Ordered finalization, immobile (but collectable) objects, weak/ephemeron generic hash tables, and reference bytevectors

  • Easier bootstrapping via old versions of Chez Scheme


Install the latest version of chez-scheme-for-racket as follows:

guix install chez-scheme-for-racket

Or install a particular version:

guix install chez-scheme-for-racket@9.9.9-pre-release.14

You can also install packages in augmented, pure or containerized environments for development or simply to try them out without polluting your user profile. See the guix shell documentation for more information.