[bug#49440] [PATCH core-updates]: Compile bdw-gc with support for disclaim procedures

[Maxime Devos]

Hi guix,

Disclaim procedures do not seem to be used in the wild,
but seem useful for implementing ephemerons in Guile
(to be investigated), hence this patch.

Guile seems to start building fine when using a bdw-gc packave
with "--enable-disclaim" added (I'm using (package (inherit ...) ...),
but that was on master. I'll verify on core-updates, but building
things will take some time.

Greetings,
Maxime.

From 34f32618f8f9099eabbd7734337f455aa1c7e150 Mon Sep 17 00:00:00 2001
From: Maxime Devos <maximedevos@telenet.be>
Date: Tue, 6 Jul 2021 16:50:39 +0200
Subject: [PATCH core-updates] gnu: bdw-gc: Compile with support for disclaim
 procedures.

Disclaim procedures do not seem to be used in the wild,
but seem useful for implementing ephemerons in Guile
(to be investigated).

* gnu/packages/bdw-gc.scm
  (libgc)[arguments]<#:configure-flags>: Add --enable-disclaim.
---
 gnu/packages/bdw-gc.scm | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gnu/packages/bdw-gc.scm b/gnu/packages/bdw-gc.scm
index 0d82889bac..dfa9a61101 100644
--- a/gnu/packages/bdw-gc.scm
+++ b/gnu/packages/bdw-gc.scm
@@ -4,6 +4,7 @@
 ;;; Copyright © 2016, 2018 Leo Famulari <leo@famulari.name>
 ;;; Copyright © 2017 Rene Saavedra <rennes@openmailbox.org>
 ;;; Copyright © 2019, 2020 Marius Bakke <mbakke@fastmail.com>
+;;; Copyright © 2021 Maxime Devos <maximedevos@telenet.be>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -47,6 +48,9 @@
        ;; Install gc_cpp.h et al.
        "--enable-cplusplus"
 
+       ;; Support GC_finalized_malloc and disclaim procedures.
+       "--enable-disclaim"
+
        ;; Work around <https://github.com/ivmai/bdwgc/issues/353>.
        "--disable-munmap"
 
-- 
2.32.0

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