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gnu: chez-scheme: Bootstrap from source.

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* gnu/packages/chez.scm (chez-scheme)[source]<snippet>: Also unbundle
pre-built boot files.
(chez-scheme-bootstrap-bootfiles): Stop inheriting from 'chez-scheme'.
[native-inputs]: Add 'zuo', 'chez-nanopass-bootstrap', and either
'chez-scheme-for-racket' or, for cross builds, 'chez-scheme'.
[build-system]: Change to gnu-build-system.
[arguments]: Change to run 'configure' and then bootstrap via
`make re.boot` or, for cross builds, `make cross.boot`
[synopsis, description]: Update accordingly.
(chez-scheme-for-racket-bootstrap-bootfiles)[synopsis]: Write "boot
files" as two words in prose.
[description]: Likewise.
* gnu/packages/racket.scm: Update comments.

Change-Id: I55d9b57090ecaca0aa2ab19c2c3ebae2243a9173
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
This commit is contained in:
Philip McGrath 2024-04-01 02:51:13 -04:00 • committed by Ludovic Courtès
parent 9d407205e8
commit 4e7337536b
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GPG key ID: 090B11993D9AEBB5
2 changed files with 112 additions and 35 deletions
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24
gnu/packages/racket.scm
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@ -72,6 +72,7 @@
;; ├── bc/
;; ├── cs/
;; ├── ChezScheme/
;; ├── rktboot/
;; ├── zuo/
;; └── ...
;;
@ -149,14 +150,12 @@
;; - Racket BC [3M] needs an existing Racket to run "xform",
;; which transforms its own C source code to add additional annotations
;; for the precise garbage collector.
;; - Racket CS needs (bootfiles for) Racket's fork of Chez Scheme.
;; It also needs an existing Racket to compile Racket-implemented
;; - Racket CS needs (boot files for) the corresponding version of Chez
;; Scheme. It also needs an existing Racket to compile Racket-implemented
;; parts of the runtime system to R6RS libraries.
;; - Chez Scheme also needs bootfiles for itself, but Racket can simulate
;; enough of Chez Scheme to load Racket's fork of the Chez Scheme compiler
;; purely from source into Racket and apply the compiler to itself,
;; producing the needed bootfiles (albeit very slowly).
;; Any variant of Racket since version 7.1 can run the simulation.
;; - Chez Scheme also needs boot files for itself, but Racket BC can
;; bootstrap these using the code in "racket/src/rktboot/".
;; See the commentary in "chez.scm" for further details
;;
;; So, we build CGC to build 3M to build bootfiles and CS.
;;
@ -164,6 +163,14 @@
;; often use "BC" to mean "3M", consistent with `(banner)` and the
;; suffixes used on executables when more than one variant co-exists.)
;;
;; Since the pre-releases for Chez Scheme 10.0.0, all of Racket's changes have
;; been merged upstream, and development will be kept in sync going
;; forward. However, there is no plan to align the Chez Scheme and Racket
;; release cycles. For the near fulture, a given released version of Racket
;; will continue to depend on a specific pre-release version of Chez Scheme as
;; part of Racket CS's "ABI". See upstream discussion at
;; <https://racket.discourse.group/t/2739/3>.
;;
;; One remaining bootstrapping limitation is that Racket's reader, module
;; system, and macro expander are implemented in Racket. For Racket CS,
;; they are compiled to R6RS libraries as discussed above. This note from the
@ -189,7 +196,8 @@
;; Zuo is notably *not* a problem for bootstrapping. The implementation is a
;; single hand-written C file designed to build with just `cc -o zuo zuo.c`,
;; even with very old or limited compilers. (We use the Autoconf support for
;; convienience.)
;; convienience.) As of Zuo 1.8, Zuo has tagged releases in its own repository
;; independent of the Racket release cycle.
;;
;; CODE: