80 lines
3.1 KiB
Groff
80 lines
3.1 KiB
Groff
Subject: Mes 0.5 released
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I am pleased to announce the release of Mes 0.5, representing 250
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commits over 4 months. Mes is now self-hosting, or rather it features
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a mutual self-hosting Scheme interpreter and C compiler: mes.c and
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mescc; a Nyacc-based C compiler backend that also works separately
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with Guile.
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* About
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Mes aims to create full source bootstrapping for GuixSD: an
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entirely source-based bootstrap path. The target is to [have
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GuixSD] boostrap from a minimal, easily inspectable binary --that
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should be readable as source-- into something close to R6RS
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Scheme.
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It currently consists of a mutual self-hosting [close to Guile-]
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Scheme interpreter prototype in C and a Nyacc-based C compiler in
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[Guile] Scheme.
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The Scheme interpreter prototype (mes.c) has a Garbage Collector,
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a library of loadable Scheme modules-- notably Dominique Boucher's
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LALR[1], Pre-R6RS portable syntax-case[2] with R7RS ellipsis, Matt
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Wette's Nyacc[3] Guile's PEG[4] --and test suite just barely
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enough to support a simple REPL (repl.mes) and simple C-compiler
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(mescc.mes) that can produce the second initial ELF binary from
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binary from mes.c, in only about 2h30'.
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Mes was inspired by The Maxwell Equations of Software: LISP-1.5[5]
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-- John McCarthy page 13, GNU Guix's[6] source/binary packaging
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transparency and Jeremiah Orians's stage0[7] bootstrap project.
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* Download
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git clone https://gitlab.com/janneke/mes
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wget https://gitlab.com/janneke/mes/repository/archive.tar.gz?ref=v0.5 -O mes-0.5.tar.gz
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Mes runs from the source tree and can also be built, packaged and
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installed in Guix[SD] by the usual
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guix package -f guix.scm
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* Changes in 0.5 since 0.4
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** Core
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*** Support compilation with Mescc.
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*** Support compilation with -nostdinc, -nostdlib using mlibc.
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*** Support call-with-current-continuation.
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*** Support exception handling, catch/throw.
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*** Give sensible error message when a macro is missing.
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** Language
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*** Map now supports 4 lists.
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*** The reader supports negative hex numbers.
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*** 24 new functions
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access?, assoc-set! c????r, compose, list->char-set,
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open-input-string, read-string, string-delete, with-throw-handler.
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** Mescc
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*** Mescc can be used separately as a Nyacc-based C compiler backend for Guile.
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*** Switch to Nyacc frontend, update Nyacc to 0.76.5.
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*** Mescc now has a test suite, scaffold/t.c.
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*** Mescc now includes a minimal C library: libc/mlib.c libc/mstart.c.
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*** Mescc can now compile mes.c.
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** Noteworthy bug fixes
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*** The build system (configure, make) has been refactored.
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*** Support map-4.
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*** Evaluate arguments of OR only once.
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*** Fix assq-set!
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*** Fix ,expand in the REPL.
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Greetings,
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janneke
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[1] https://github.com/schemeway/lalr-scm
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[2] https://www.cs.indiana.edu/chezscheme/syntax-case/old-psyntax.html
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[3] https://www.nongnu.org/nyacc/
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[4] https://www.gnu.org/software/guile/docs/master/guile.html/PEG-Parsing.html
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[5] http://www.softwarepreservation.org/projects/LISP/book/LISP%201.5%20Programmers%20Manual.pdf
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[6] https://www.gnu.org/software/guix/
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[7] https://github.com/oriansj/stage0
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