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[epsilon-devel] Mes 0.9 released

From: Jan Nieuwenhuizen
Subject: [epsilon-devel] Mes 0.9 released
Date: Wed, 26 Jul 2017 14:11:05 +0200

I am pleased to announce the release of Mes 0.9, representing 107
commits over 5 weeks.  Mescc now compiles to a surprisingly readable
stage0 M1 macro assembler output format.  Also, mescc can now compile a
modified TinyCC into a running [mostly segfaulting] executable.  This is
a major milestone as tcc can compile GCC.

* About

    Mes[0] aims to create full source bootstrapping for GuixSD[1] as
    part of the bootstrappable builds[2] project.

    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.  This C prototype will be rewritten in stage0[3]
    M1 assembly (or possibly stage2 slow-LISP, or ...).

    The Scheme interpreter prototype (mes.c) has a Garbage Collector,
    a library of loadable Scheme modules-- notably Dominique Boucher's
    LALR[4], Pre-R6RS portable syntax-case[5] with R7RS ellipsis, Matt
    Wette's Nyacc[6], Guile's PEG[7] --and test suite just barely
    enough to support a simple REPL (repl.mes) and simple C-compiler

    The simple C compiler can compile a modified TinyCC[8].  This
    needs more work.  A gcc-compiled tcc is known[9] to compile GCC.

    Mes is inspired by The Maxwell Equations of Software: LISP-1.5[10]
    -- John McCarthy page 13, GNU Guix's source/binary packaging
    transparency and Jeremiah Orians's stage0 ~300 byte self-hosting
    hex assembler.

* Download

    git clone https://gitlab.com/janneke/mes

    wget https://gitlab.com/janneke/mes/repository/archive.tar.gz?ref=v0.9 -O 

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 0.9 since 0.8
 ** Core
 *** Mes now builds better in non-Guix[SD] legacy distros/environments.  
Thanks, rain1!
 ** Mescc
 *** Mescc now compiles a modified tinycc into a running [mostly segfaulting] 
 https://gitlab.com/janneke/tinycc branch wip-mescc.
 *** Mescc now supports locals stack frame larger than 1 byte offset.
 *** Mescc now supports incomplete struct initializers {0}.
 *** Mescc now supports >>=, <<=, ^=, ~.
 *** Mescc now supports the comma operator.
 *** Mescc now supports mullti-line string initializers.
 *** Mescc now supports unions.
 *** Mescc now supports arrays in structs.
 *** Mescc now supports structs in structs.
 *** Mescc has been refactored to use records.
 *** Mescc now builds and runs with Guile-2.0 (legacy distro support, Guile-2.2 
 *** Mescc now bundles tinycc's test2 test suite, passes one more test [34/55 
 *** Mescc now has an incremental test suite consisting of 56 tests.
 *** Mescc now supports stdarg variable argument lists.
 *** Mescc now has __GNUC__ unset, #f (WAS: 0).
 *** Mescc now depends on Nyacc 0.80.3.
 *** Mescc now depends on M1 from MESCC_Tools v0.2.
 *** Mescc now compiles to M1 object files.
 **** 7 new mlibc functions
 calloc, close, getcwd, lseek, sprintf, unlink, vprintf.
 **** 31 new mlibc stubs
 execvp, fclose, fdopen, fflush, fopen, fprintf, fread, free, fseek,
 ftell, fwrite, localtime, longjmp, memcpy, memmove, memmove, memset,
 qsort, remove, setjump, snprintf, sscanf, strchr, strrchr, strstr,
 strtol, strtoll, strtoul, strtoull, time, vnsprintf.
 **** 10 new header files
 alloca.h, float.h, libgen.h, locale.h, stdbool.h, stddef.h, stdint.h,
 stdnoreturn.h, sys/select.h, sys/wait.h.
 ** Noteworthy bug fixes
 *** Many bugs and limitations in mescc have been fixed and removed.


[0] https://gitlab.com/janneke/mes
[1] https://www.gnu.org/software/guix
[2] http://bootstrappable.org
[3] https://github.com/oriansj/stage0
[4] https://github.com/schemeway/lalr-scm
[5] https://www.cs.indiana.edu/chezscheme/syntax-case/old-psyntax.html
[6] https://www.nongnu.org/nyacc/
[7] https://www.gnu.org/software/guile/docs/master/guile.html/PEG-Parsing.html
[8] https://gitlab.com/janneke/tinycc
[9] https://lists.gnu.org/archive/html/tinycc-devel/2017-05/msg00103.html

Jan Nieuwenhuizen <address@hidden> | GNU LilyPond http://lilypond.org
Freelance IT http://JoyofSource.com | AvatarĀ® http://AvatarAcademy.com

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