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

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Package: guix; Reported by: Tomas Volf <~@wolfsden.cz>; dated Mon, 25 Nov 2024 17:51:01 UTC; Maintainer for guix is bug-guix@HIDDEN.

Did not alter fixed versions and reopened. Request was from Debbugs Internal Request <help-debbugs@HIDDEN> to internal_control <at> debbugs.gnu.org. Full text available.

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From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN>
To: Timo Wilken <guix@HIDDEN>
Subject: Re: bug#74532: with-extensions does not add native extensions to
 the load path
In-Reply-To: <20250325182142.8645-5-guix@HIDDEN> (Timo Wilken's message
 of "Tue, 25 Mar 2025 19:12:53 +0100")
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Timo Wilken <guix@HIDDEN> skribis:

> * gnu/packages/guile-xyz.scm (guile-yamlpp) [arguments] <phases>:
>   Add 'set-extension-file-name and move 'check after 'install.
>
> Change-Id: I49a7199b4e0fe4053822374bae59c6e1d0b7ead0

Applied, thanks!

Notification sent to Tomas Volf <~@wolfsden.cz>:
bug acknowledged by developer. Full text available.

Reply sent to Ludovic Courtès <ludo@HIDDEN>:
You have taken responsibility. Full text available.

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 =?UTF-8?q?Ludovic=20Court=C3=A8s?= <ludo@HIDDEN>
Subject: [PATCH v2] gnu: guile-yamlpp: Allow usage with `with-extensions'
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* gnu/packages/guile-xyz.scm (guile-yamlpp) [arguments] <phases>:
  Add 'set-extension-file-name and move 'check after 'install.

Change-Id: I49a7199b4e0fe4053822374bae59c6e1d0b7ead0
---
 gnu/packages/guile-xyz.scm | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/gnu/packages/guile-xyz.scm b/gnu/packages/guile-xyz.scm
index f0277f430ec..cabc3101320 100644
--- a/gnu/packages/guile-xyz.scm
+++ b/gnu/packages/guile-xyz.scm
@@ -2020,6 +2020,23 @@ (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.
+            ;; 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\"(.*)\\)" _ init)
+                   (format #f "(load-extension \"~a/lib/guile/3.0/libguile-yamlpp\"~a)"
+                           (assoc-ref outputs "out") init)))))
+            ;; Move 'check after installation, so that the foreign library is
+            ;; present where we expect it (as we hardcode its path above).
+            (delete 'check)
+            (add-after 'install 'check
+              (assoc-ref %standard-phases 'check)))))
     (native-inputs (list autoconf automake libtool pkg-config))
     (inputs (list guile-3.0 yaml-cpp))
     (native-search-paths
-- 
2.49.0

Information forwarded to ~@wolfsden.cz, ludo@HIDDEN, zhengjunjie@HIDDEN, guix@HIDDEN, bug-guix@HIDDEN:
bug#74532; Package guix. Full text available.

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From: Timo Wilken <guix@HIDDEN>
To: Tomas Volf <~@wolfsden.cz>,
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Subject: Re: bug#74532: [PATCH] gnu: guile-yamlpp: Allow usage with
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Hi Tomas, hi Ludo', hi Z572,

On Tue 25 Mar 2025 at 11:10 am CET, Ludovic Courtès wrote:
> Tomas Volf <~@wolfsden.cz> skribis:
>> Timo Wilken <guix@HIDDEN> writes:
>> I am not sure it is optimal to hide *all* errors from load-extension.
>> Maybe check if file exists and then try to load-extension it without the
>> false-if-exception?

I think the v2 patch makes this moot -- see below.

> Or just unconditionally load from the absolute file name?  I don’t see
> what the ‘or’ buys us.

That only works if I move 'check after 'install -- else it fails with an error
in `load-foreign-library', saying the file doesn't exist.

The v2 patch does that, and works for me (as in, it compiles and I can use the
resulting package in `with-extensions').

Feedback is very welcome!

Cheers,
Timo

Information forwarded to ~@wolfsden.cz, ludo@HIDDEN, zhengjunjie@HIDDEN, guix@HIDDEN, bug-guix@HIDDEN:
bug#74532; Package guix. Full text available.