GNU bug report logs - #74532
with-extensions does not add native extensions to the load path

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From: Timo Wilken <guix <at> twilken.net>
To: 74532 <at> debbugs.gnu.org
Cc: Tomas Volf <~@wolfsden.cz>, Ludovic Courtès <ludo <at> gnu.org>, Z572 <zhengjunjie <at> iscas.ac.cn>
Subject: bug#74532: [PATCH] gnu: guile-yamlpp: Allow usage with `with-extensions'
Date: Sat, 15 Mar 2025 22:10:09 +0100

* gnu/packages/guile-xyz.scm (guile-yamlpp) [arguments] <phases>:
  Add 'set-extension-file-name.

Change-Id: I49a7199b4e0fe4053822374bae59c6e1d0b7ead0
---
 gnu/packages/guile-xyz.scm | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/gnu/packages/guile-xyz.scm b/gnu/packages/guile-xyz.scm
index 30c8e847996..f43e06a3a7f 100644
--- a/gnu/packages/guile-xyz.scm
+++ b/gnu/packages/guile-xyz.scm
@@ -1997,6 +1997,19 @@ (define-public guile-yamlpp
        (sha256
         (base32 "0ik69y0vddg0myp0zdbkmklma0qkkrqzwlqwkij1zirklz6hl1ss"))))
     (build-system gnu-build-system)
+    (arguments
+     `(#:phases
+       ,#~(modify-phases %standard-phases
+            ;; In order to let Guile find the compiled library when used with
+            ;; Guix' `with-extension', hardcode the final path to the library.
+            ;; The fallback is needed for tests (i.e. before the 'install phase).
+            ;; See <https://issues.guix.gnu.org/74532>.
+            (add-after 'unpack 'set-extension-file-name
+              (lambda* (#:key outputs #:allow-other-keys)
+                (substitute* "scm/yamlpp.scm"
+                  (("\\(load-extension \"libguile-yamlpp\"(.*)\\)" all init)
+                   (format #f "(or (false-if-exception (load-extension \"~a/lib/guile/3.0/libguile-yamlpp\"~a)) ~a)"
+                           (assoc-ref outputs "out") init all))))))))
     (native-inputs (list autoconf automake libtool pkg-config))
     (inputs (list guile-3.0 yaml-cpp))
     (native-search-paths
-- 
2.48.1

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