65 lines
2.4 KiB
Markdown
65 lines
2.4 KiB
Markdown
<img width="500" src="https://raw.githubusercontent.com/picrin-scheme/picrin/master/etc/picrin-logo-fin01-02.png"></img>
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[](https://travis-ci.org/picrin-scheme/picrin)
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[](https://picrin.readthedocs.org/)
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Picrin is a lightweight R7RS scheme implementation written in pure C89. It contains a reasonably fast VM, an improved hygienic macro system, useful contribution libraries, and simple but powerful C interface.
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- R7RS compatible
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- Reentrant design (all VM states are stored in single global state object)
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- Bytecode interpreter
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- Direct threaded VM
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- Internal representation by nan-boxing (available only on x64)
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- Conservative call/cc implementation (VM stack and native c stack can interleave)
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- Exact GC (simple mark and sweep, partially reference count)
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- String representation by rope
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- Hygienic macro transformers (syntactic closures, explicit and implicit renaming macros)
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- Extended library syntax
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## Documentation
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See http://picrin.readthedocs.org/
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## Homepage
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Currently picrin is hosted on Github. You can freely send a bug report or pull-request, and fork the repository.
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https://github.com/picrin-scheme/picrin
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## IRC
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Our chat room is at #picrin channel, chat.freenode.org. IRC logs here: https://botbot.me/freenode/picrin/
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## Build
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Just type `make` in the project root directory. You will find an executable binary newly created at bin/ directory.
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$ make
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When you are building picrin on x86_64 system, PIC_NAN_BOXING flag is automatically turned on (see include/picrin/config.h for detail).
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## Install
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`make install` target is provided. By default it installs picrin binary into `/usr/local/bin/`.
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$ make install
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Since picrin does not use autoconf, if you want to specify the install directory, pass the custom path to `make` via command line argument.
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$ make install prefix=/path/to/dir
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## Requirement
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To build Picrin Scheme from source code, some external libraries are required:
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- perl
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- regex.h of POSIX.1
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- libedit (optional)
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Make command automatically turns on optional libraries if available.
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Picrin is mainly developed on Mac OS X and only tested on OS X or Ubuntu 14.04+. When you tried to run picrin on other platforms and found something was wrong with it, please send us an issue.
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## Authors
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See `AUTHORS`
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