Subject: Mes 0.5 released I am pleased to announce the release of Mes 0.5, representing 250 commits over 4 months. Mes is now self-hosting, or rather it features a mutual self-hosting Scheme interpreter and C compiler: mes.c and mescc; a Nyacc-based C compiler backend that also works separately with Guile. * About Mes aims to create full source bootstrapping for GuixSD: an entirely source-based bootstrap path. The target is to [have GuixSD] boostrap from a minimal, easily inspectable binary --that should be readable as source-- into something close to R6RS Scheme. It currently consists of a mutual self-hosting [close to Guile-] Scheme interpreter prototype in C and a Nyacc-based C compiler in [Guile] Scheme. The Scheme interpreter prototype (mes.c) has a Garbage Collector, a library of loadable Scheme modules-- notably Dominique Boucher's LALR[1], Pre-R6RS portable syntax-case[2] with R7RS ellipsis, Matt Wette's Nyacc[3] Guile's PEG[4] --and test suite just barely enough to support a simple REPL (repl.mes) and simple C-compiler (mescc.mes) that can produce the second initial ELF binary from binary from mes.c, in only about 2h30'. Mes was inspired by The Maxwell Equations of Software: LISP-1.5[5] -- John McCarthy page 13, GNU Guix's[6] source/binary packaging transparency and Jeremiah Orians's stage0[7] bootstrap project. * Download git clone https://gitlab.com/janneke/mes wget https://gitlab.com/janneke/mes/repository/archive.tar.gz?ref=v0.5 -O mes-0.5.tar.gz Mes runs from the source tree and can also be built, packaged and installed in Guix[SD] by the usual guix package -f guix.scm * Changes in 0.5 since 0.4 ** Core *** Support compilation with Mescc. *** Support compilation with -nostdinc, -nostdlib using mlibc. *** Support call-with-current-continuation. *** Support exception handling, catch/throw. *** Give sensible error message when a macro is missing. ** Language *** Map now supports 4 lists. *** The reader supports negative hex numbers. *** 24 new functions access?, assoc-set! c????r, compose, list->char-set, open-input-string, read-string, string-delete, with-throw-handler. ** Mescc *** Mescc can be used separately as a Nyacc-based C compiler backend for Guile. *** Switch to Nyacc frontend, update Nyacc to 0.76.5. *** Mescc now has a test suite, scaffold/t.c. *** Mescc now includes a minimal C library: libc/mlib.c libc/mstart.c. *** Mescc can now compile mes.c. ** Noteworthy bug fixes *** The build system (configure, make) has been refactored. *** Support map-4. *** Evaluate arguments of OR only once. *** Fix assq-set! *** Fix ,expand in the REPL. Greetings, janneke [1] https://github.com/schemeway/lalr-scm [2] https://www.cs.indiana.edu/chezscheme/syntax-case/old-psyntax.html [3] https://www.nongnu.org/nyacc/ [4] https://www.gnu.org/software/guile/docs/master/guile.html/PEG-Parsing.html [5] http://www.softwarepreservation.org/projects/LISP/book/LISP%25201.5%2520Programmers%2520Manual.pdf [6] https://www.gnu.org/software/guix/ [7] https://github.com/oriansj/stage0