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# Guix Scheme Containers and Environments
Run Scheme implementations in Guix containers/environments, and package
libraries for them.
Supports Chibi, Foment, Sagittarius, Gauche, Loko, STKlos, TR7, Mosh,
Chez, and SKINT.
## Portable R6RS and R7RS Libraries
Some Scheme systems packaged here will read `R7RS_LIBRARY_PATH`
(or `R6RS_LIBRARY_PATH` for R6RS systems) to find paths for strictly
conforming R7RS (R6RS) libraries. To copy libraries to these pathes,
use the `portable-r7rs-build-system` (`portable-r6rs-build-system`).
On systems that support both R6RS and R7RS, the R6RS libraries will
take precedence (rationale: R6RS has more stuff).
## SRFIs and Portability Libraries
This channel packages some SRFIs for portable use. They are labeled
`srfi-M-rNrs`, where `M` is the number and `N` is the standard. The
SRFIs are packaged so that R7RS systems use `(srfi M)` and R6RS
systems use `(srfi :M)`. No claim is made to the portability of
`(srfi :M name)`, etc, unless made necessary by sublibraries.
* SRFI-1
* SRFI-8
* SRFI-9 (R6RS only)
* SRFI-128
* SRFI-227
None of these packages have any dependencies. This is because some
implementations already come with optimized versions of these SRFIs. For
instance, a system with built-in comparators doesn't need to pull in
the portable SRFI-128 implementation to use some other library that imports
SRFI-128.
The following portability libraries are also exported.
* `compatible-parameters`: Exports `(mcgoron compatible-parameters)` for
R6RS systems that exports either an SRFI-39 or R7RS parameter interface.
## Supported Implementations
### Chibi Scheme
* Package: `chibi-scheme-with-path`
* Path: `chibi-lib-dir`, `chibi-binlib-dir`
* Supports `R7RS_LIBRARY_PATH`
### Foment
* Package: `foment-with-path`
* Path: `foment-lib-dir`
* Supports `R7RS_LIBRARY_PATH`
The build script here will build [Foment](https://github.com/leftmike/foment).
The last release of Foment was a long time ago, so the build is for the
current HEAD at the time of writing (6089c3c).
### Sagittarius
* Package: `sagittarius-scheme-with-path`
* Path: `sagittarius-lib-dir`
* Supports `R7RS_LIBRARY_PATH`, `R6RS_LIBRARY_PATH`
### Gauche
* Package: `gauche-with-path`
* Pure Scheme: `gauche-pure-scheme-build-system`
TODO: explain gauche, add gauche build system
### Loko
* Package: `loko-scheme-with-path`
* Path: `loko-scheme-lib-dir`
* Supports `R7RS_LIBRARY_PATH`, `R6RS_LIBRARY_PATH`
### STKlos
* Package: `stklos-with-path`
* Path: `stklos-lib-dir`
* Supports `R7RS_LIBRARY_PATH`
TODO: loading bytecode
### TR7
* Package: `tr7-with-path`
* Path: `tr7-lib-dir`
* Supports `R7RS_LIBRARY_PATH`
TODO: extensions
### Mosh
* Package: `mosh-scheme-with-path`
* Path: `mosh-lib-dir`
* Supports `R6RS_LIBRARY_PATH`
### SKint
* Package: `skint-with-path`
* Path: `skint-lib-dir`
* Supports `R7RS_LIBRARY_PATH`
### Chez Scheme
* Package: `chez-scheme-with-path`
* Path: `chez-lib-dir`
* Supports `R6RS_LIBRARY_PATH`
TODO: heap files?
## Planned
Any R6RS/R7RS that has a path mechanism and that can run on a system
running Guix should be included.
### Maybe?
* Picrin (does not search the filesystem for libraries)
* Chicken, Cyclone, Gambit (compilers)
* The Javascipt ones
* Kawa (java)
* Racket, MIT-Scheme (dunno how they work)
* Ikarus
* Vicare (difficult to compile on modern systems)
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