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[bug#55248,v3,9/9] gnu: chez-scheme-for-system: Adjust for bytecode backend.

Message ID fb4003afba005086c1db419e6641cf1f50e38fb2.1652075689.git.philip@philipmcgrath.com
State New
Headers show
Series gnu: Update Racket to 8.5 and Chez Scheme to 9.5.8. | expand


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Commit Message

Philip McGrath May 9, 2022, 6:02 a.m. UTC
Change 'chez-scheme-for-system' to return 'chez-scheme-for-racket' in
two cases when it previously returned 'chez-scheme':

 1. When 'chez-scheme' is not distributed with bootstrap bootfiles,
    since we can only cross-compile 'chez-scheme' for those systems; and

 2. When neither 'chez-scheme' nor 'chez-scheme-for-racket' supports
    native code generation, since we will be able to use the ``portable
    bytecode'' backends of 'chez-scheme-for-racket' as soon as the
    issues in <https://racket.discourse.group/t/950> are resolved.

* gnu/packages/chez.scm (chez-scheme-for-racket): Change condition.
 gnu/packages/chez.scm | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)
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diff --git a/gnu/packages/chez.scm b/gnu/packages/chez.scm
index cae17580f8..7e6273f26a 100644
--- a/gnu/packages/chez.scm
+++ b/gnu/packages/chez.scm
@@ -69,14 +69,17 @@  (define-module (gnu packages chez)
 (define* (chez-scheme-for-system #:optional
                                  (system (or (%current-target-system)
-  "Return 'chez-scheme' unless only 'chez-scheme-for-racket' supports SYSTEM,
-including support for native threads."
-  (if (or
-       ;; full support upstream
-       (and=> (chez-upstream-features-for-system system)
-              (cut memq 'threads <>))
-       ;; no support anywhere
-       (not (nix-system->chez-machine system)))
+  "Return 'chez-scheme' if it fully supports SYSTEM, including support for
+bootstrapping and native threads.  Otherwise, return
+  (if (and=> (chez-upstream-features-for-system system)
+             (lambda (features)
+               (every (cut memq <> features)
+                      '(threads
+                        ;; We can cross-compile for platforms without
+                        ;; bootstrap bootfiles, but we can't self-host
+                        ;; on them short of adding more binary seeds.
+                        bootstrap-bootfiles))))