From 5f71a9872e81f8c549657f97cba04d5c3928afbc Mon Sep 17 00:00:00 2001
From: Ludovic Courtès <ludovic.courtes@inria.fr>
Date: Thu, 3 Oct 2024 09:11:53 +0200
Subject: gnu: kokkos: Mark as tunable.

* gnu/packages/cpp.scm (kokkos)[properties]: New field.

Change-Id: I763828ab23547dd519c2fe104ef2ac0b31e1add7
---
 gnu/packages/cpp.scm | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/cpp.scm b/gnu/packages/cpp.scm
index b4a02a2060..b32b6da1cc 100644
--- a/gnu/packages/cpp.scm
+++ b/gnu/packages/cpp.scm
@@ -2,7 +2,7 @@
 ;;; Copyright © 2017 Ethan R. Jones <doubleplusgood23@gmail.com>
 ;;; Copyright © 2018–2021 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;; Copyright © 2018 Fis Trivial <ybbs.daans@hotmail.com>
-;;; Copyright © 2018, 2021, 2023 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2018, 2021, 2023-2024 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2019, 2020, 2022 Mathieu Othacehe <m.othacehe@gmail.com>
 ;;; Copyright © 2019 Pierre Neidhardt <mail@ambrevar.xyz>
 ;;; Copyright © 2019 Jan Wielkiewicz <tona_kosmicznego_smiecia@interia.pl>
@@ -1368,6 +1368,11 @@ hierarchies and multiple types of execution resources.")
     ;; Code exhibits integer size mismatches when compiled on 32-bit systems.
     (supported-systems %64bit-supported-systems)
 
+    ;; This code can benefit from SIMD optimizations; tuning gives an effect
+    ;; equivalent to setting the 'KOKKOS_ARCH_NATIVE' CMake flag, except for
+    ;; the configuration metadata recorded in 'Kokkos_Core.cpp'.
+    (properties '((tunable? . #t)))
+
     (license license:asl2.0))) ; With LLVM exception
 
 (define-public tweeny
-- 
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