[bug#65155] [PATCH] gnu: mesa: Add native-search-paths.

[David Elsing <david.elsing@posteo.net>]

Hello,

John Kehayias <john.kehayias@protonmail.com> writes:

> So perhaps this belongs in vulkan-loader? Although I admit I'm less sure
> for XDG_* related paths. Is there a test case or something we can see if
> this does what is intended for vulkan?

I also noticed the same problem and agree that the search path belongs
in the vulkan-loader package:

--8<---------------cut here---------------start------------->8---
diff --git a/gnu/packages/vulkan.scm b/gnu/packages/vulkan.scm
index 285d6be7f5..98ce979652 100644
--- a/gnu/packages/vulkan.scm
+++ b/gnu/packages/vulkan.scm
@@ -303,6 +303,11 @@ (define-public vulkan-loader
            wayland))
     (inputs
      (list vulkan-headers libxrandr))
+    (native-search-paths
+     (list
+      (search-path-specification
+       (variable "XDG_DATA_DIRS")
+       (files '("share")))))
     (home-page
      "https://github.com/KhronosGroup/Vulkan-Loader")
     (synopsis "Khronos official ICD loader and validation layers for Vulkan")
--8<---------------cut here---------------end--------------->8---

I tested it with
--8<---------------cut here---------------start------------->8---
guix shell -C vulkan-tools vulkan-loader mesa --no-grafts -- vulkaninfo
--8<---------------cut here---------------end--------------->8---
which works with the patch applied. As documented in [1], vulkan-loader
still needs to be part of the profile for the search path to take effect.

Cheers,
David

[1] https://guix.gnu.org/manual/en/html_node/Search-Paths.html