From 3b4d7cdccce97dbffee538812c86bc03a6ae35d9 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ludovic=20Court=C3=A8s?= Date: Thu, 2 Apr 2020 14:17:36 +0200 Subject: bournish: Prevent inlining of run-time support procedures. On Guile 3, those procedures could be inlined, leading to unbound-variable errors: scheme@(guile-user)> ,bournish Welcome to Bournish, a minimal Bourne-like shell! To switch back, type `,L scheme'. bournish@(guile-user)> ls ice-9/boot-9.scm:1669:16: In procedure raise-exception: Unbound variable: ls-command-implementation Reported by Ricardo Wurmus. * guix/build/bournish.scm (define-command-runtime): New macro. (ls-command-implementation, wc-command-implementation) (wc-l-command-implementation, wc-c-command-implementation): Use it instead of 'define'. --- guix/build/bournish.scm | 24 +++++++++++++++++++----- 1 file changed, 19 insertions(+), 5 deletions(-) (limited to 'guix/build') diff --git a/guix/build/bournish.scm b/guix/build/bournish.scm index 247a687d80..31fc493b09 100644 --- a/guix/build/bournish.scm +++ b/guix/build/bournish.scm @@ -1,5 +1,5 @@ ;;; GNU Guix --- Functional package management for GNU -;;; Copyright © 2016, 2017 Ludovic Courtès +;;; Copyright © 2016, 2017, 2020 Ludovic Courtès ;;; Copyright © 2016 Efraim Flashner ;;; Copyright © 2017 Ricardo Wurmus ;;; @@ -83,7 +83,21 @@ TERMINAL-WIDTH. Use COLUMN-GAP spaces between two subsequent columns." (newline) (loop (map 1+ indexes))))) -(define ls-command-implementation +(define-syntax define-command-runtime + (syntax-rules () + "Define run-time support of a Bournish command. This macro ensures that +the implementation is not subject to inlining, which would prevent compiled +code from referring to it via '@@'." + ((_ (command . args) body ...) + (define-command-runtime command (lambda args body ...))) + ((_ command exp) + (begin + (define command exp) + + ;; Prevent inlining of COMMAND. + (set! command command))))) + +(define-command-runtime ls-command-implementation ;; Run-time support procedure. (case-lambda (() @@ -173,13 +187,13 @@ TERMINAL-WIDTH. Use COLUMN-GAP spaces between two subsequent columns." (call-with-input-file file lines+chars))) (format #t "~a ~a~%" chars file))) -(define (wc-command-implementation . files) +(define-command-runtime (wc-command-implementation . files) (for-each wc-print (filter file-exists?* files))) -(define (wc-l-command-implementation . files) +(define-command-runtime (wc-l-command-implementation . files) (for-each wc-l-print (filter file-exists?* files))) -(define (wc-c-command-implementation . files) +(define-command-runtime (wc-c-command-implementation . files) (for-each wc-c-print (filter file-exists?* files))) (define (wc-command . args) -- cgit v1.2.3