GNU bug report logs - #57050
[PATCH 0/6] gnu: Update Racket to 8.6. Add Zuo.

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Message #254 received at 57050 <at> debbugs.gnu.org (full text, mbox):

From: Philip McGrath <philip <at> philipmcgrath.com>
To: 57050 <at> debbugs.gnu.org
Cc: Philip McGrath <philip <at> philipmcgrath.com>,
 Thiago Jung Bauermann <bauermann <at> kolabnow.com>, "\(" <paren <at> disroot.org>,
 Maxime Devos <maximedevos <at> telenet.be>,
 Liliana Marie Prikler <liliana.prikler <at> gmail.com>,
 Efraim Flashner <efraim <at> flashner.co.il>,
 Liliana Marie Prikler <liliana.prikler <at> ist.tugraz.at>
Subject: [PATCH v3 13/14] gnu: racket-vm-bc: Add workaround for ppc64le.
Date: Thu, 25 Aug 2022 04:54:15 -0400

This is an attempt to avoid a problem with Racket BC on ppc64 reported
in <https://issues.guix.gnu.org/57050#19> that was exposed by attempting
to use Racket BC to bootstrap Chez Scheme. Thanks to Matthew Flatt for
the workaround: <https://racket.discourse.group/t/950/30>.

* gnu/packages/racket.scm (racket-vm-bc)[arguments]<#:configure-flags>:
Increase the number of bytes that should be available on the stack for
"safety" when checking for stack overflow.
---
 gnu/packages/racket.scm | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/racket.scm b/gnu/packages/racket.scm
index 2fecae31f8..2d6bebf10e 100644
--- a/gnu/packages/racket.scm
+++ b/gnu/packages/racket.scm
@@ -414,7 +414,20 @@ (define-public racket-vm-bc
      (substitute-keyword-arguments (package-arguments racket-vm-cgc)
        ((#:configure-flags _ '())
         #~(cons "--enable-bconly"
-                #$racket-vm-common-configure-flags))))
+                #$(cond
+                   ((target-ppc64le?)
+                    ;; Attempt to avoid a problem bootstrapping Chez Scheme:
+                    ;; see <https://issues.guix.gnu.org/57050#19>
+                    ;; and <https://racket.discourse.group/t/950/30>.
+                    #~(map
+                       (lambda (flag)
+                         (if (string-prefix? "CPPFLAGS=" flag)
+                             (string-append flag
+                                            " -DSTACK_SAFETY_MARGIN=2000000")
+                             flag))
+                       #$racket-vm-common-configure-flags))
+                   (else
+                    racket-vm-common-configure-flags))))))
     (synopsis "Racket BC [3M] implementation")
     (description "The Racket BC (``before Chez'' or ``bytecode'')
 implementation was the default before Racket 8.0.  It uses a compiler written
-- 
2.32.0

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