diff options
| -rw-r--r-- | gnu/packages/chez.scm | 127 |
1 files changed, 124 insertions, 3 deletions
diff --git a/gnu/packages/chez.scm b/gnu/packages/chez.scm index 046bb3dcdc..603fc4201e 100644 --- a/gnu/packages/chez.scm +++ b/gnu/packages/chez.scm @@ -44,7 +44,119 @@ #:use-module (gnu packages image) #:use-module (gnu packages xorg) #:use-module (ice-9 match) - #:use-module (srfi srfi-1)) + #:use-module (srfi srfi-1) + #:export (nix-system->chez-machine + chez-machine->nonthreaded + chez-machine->threaded)) + +(define (chez-machine->nonthreaded machine) + "Given a string MACHINE naming a Chez Scheme machine type, returns a string +naming the nonthreaded machine type for the same architecture and OS as +MACHINE. The returned string may share storage with MACHINE." + ;; Chez Scheme documentation consistently uses "nonthreaded" rather than + ;; e.g. "unthreaded" + (if (eqv? #\t (string-ref machine 0)) + (substring machine 1) + machine)) +(define (chez-machine->threaded machine) + "Like @code{chez-machine->nonthreaded}, but returns the threaded machine +type." + (if (eqv? #\t (string-ref machine 0)) + machine + (string-append "t" machine))) + +;; Based on the implementation from raco-cross-lib/private/cross/platform.rkt +;; in https://github.com/racket/raco-cross. +;; For supported platforms, refer to release_notes/release_notes.stex in the +;; upstream Chez Scheme repository or to racket/src/ChezScheme/README.md +;; in https://github.com/racket/racket. +(define %nix-arch-to-chez-alist + `(("x86_64" . "a6") + ("i386" . "i3") + ("aarch64" . "arm64") + ("armhf" . "arm32") ;; Chez supports ARM v6+ + ("ppc" . "ppc32"))) +(define %nix-os-to-chez-alist + `(("w64-mingw32" . "nt") + ("darwin" . "osx") + ("linux" . "le") + ("freebsd" . "fb") + ("openbsd" . "ob") + ("netbsd" . "nb") + ("solaris" . "s2"))) + +(define (chez-machine->nix-system machine) + "Return the Nix system type corresponding to the Chez Scheme machine type +MACHINE. If MACHINE is not a string representing a known machine type, an +exception is raised. This function does not distinguish between threaded and +nonthreaded variants of MACHINE. + +Note that this function only handles Chez Scheme machine types in the +strictest sense, not other kinds of descriptors sometimes used in place of a +Chez Scheme machine type by Racket, such as @code{\"pb\"}, @code{#f}, or +@code{\"racket\"}. (When using such extensions, the Chez Scheme machine type +for the host system is often still relevant.)" + (let ((machine (chez-machine->nonthreaded machine))) + (let find-arch ((alist %nix-arch-to-chez-alist)) + (match alist + (((nix . chez) . alist) + (if (string-prefix? chez machine) + (string-append + nix "-" (let ((machine-os + (substring machine (string-length chez)))) + (let find-os ((alist %nix-os-to-chez-alist)) + (match alist + (((nix . chez) . alist) + (if (equal? chez machine-os) + nix + (find-os alist))))))) + (find-arch alist))))))) + +(define* (nix-system->chez-machine #:optional + (system (or (%current-target-system) + (%current-system)))) + "Return the Chez Scheme machine type corresponding to the Nix system +identifier SYSTEM, or @code{#f} if the translation of SYSTEM to a Chez Scheme +machine type is undefined. + +It is unspecified whether the resulting string will name a threaded or a +nonthreaded machine type: when the distinction is relevant, use +@code{chez-machine->nonthreaded} or @code{chez-machine->threaded} to adjust +the result." + (let* ((hyphen (string-index system #\-)) + (nix-arch (substring system 0 hyphen)) + (nix-os (substring system (+ 1 hyphen))) + (chez-arch (assoc-ref %nix-arch-to-chez-alist nix-arch)) + (chez-os (assoc-ref %nix-os-to-chez-alist nix-os))) + (and chez-arch chez-os (string-append chez-arch chez-os)))) + +(define* (chez-upstream-features-for-system #:optional + (system + (or (%current-target-system) + (%current-system)))) + "Return a list of symbols naming features supported by upstream Chez Scheme +for the Nix system identifier SYSTEM, or @code{#f} if upstream Chez Scheme +does not support SYSTEM at all. + +If native threads are supported, the returned list will include +@code{'threads}. Other feature symbols may be added in the future." + (cond + ((not (nix-system->chez-machine system)) + #f) + ((target-aarch64? system) + #f) + ((target-arm32? system) + (and (target-linux? system) + '())) + ((target-ppc32? system) + (and (target-linux? system) + '(threads))) + (else + '(threads)))) + +;; +;; Chez Scheme: +;; (define nanopass (let ((version "1.9.2")) @@ -251,8 +363,11 @@ ;; We should too. It is the Chez machine type arm32le ;; (no threaded version upstream yet, though there is in ;; Racket's fork), more specifically (per the release notes) ARMv6. - (supported-systems (fold delete %supported-systems - '("mips64el-linux" "armhf-linux"))) + (supported-systems + (delete + "armhf-linux" ;; <-- should work, but reportedly broken + (filter chez-upstream-features-for-system + %supported-systems))) (home-page "https://cisco.github.io/ChezScheme/") (synopsis "R6RS Scheme compiler and run-time") (description @@ -300,6 +415,8 @@ and 32-bit PowerPC architectures.") (invoke (search-input-file (or native-inputs inputs) "/opt/racket-vm/bin/racket") "rktboot/main.rkt"))))))) + (supported-systems (filter nix-system->chez-machine + %supported-systems)) (home-page "https://github.com/racket/ChezScheme") ;; ^ This is downstream of https://github.com/racket/racket, ;; but it's designed to be a friendly landing place for people @@ -322,6 +439,10 @@ Scheme, and @code{cs-bootstrap} does not currently support building upstream Chez Scheme.") (license (list asl2.0)))) +;; +;; Packages: +;; + (define-public chez-srfi (package (name "chez-srfi") |