From 4bc1297f963055bb39cc0937467e830f678bfc80 Mon Sep 17 00:00:00 2001
From: Ryan Curtin <ryan@ratml.org>
Date: Wed, 15 Nov 2023 08:53:36 -0500
Subject: [PATCH] Correct handling for older cereal versions.

---
 src/mlpack/core/cereal/template_class_version.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mlpack/core/cereal/template_class_version.hpp b/src/mlpack/core/cereal/template_class_version.hpp
index 6789de5e39..ea9e508964 100644
--- a/src/mlpack/core/cereal/template_class_version.hpp
+++ b/src/mlpack/core/cereal/template_class_version.hpp
@@ -39,7 +39,7 @@ struct Version<CEREAL_UNPACK TYPE>                                             \
                                                                                \
   static inline const std::uint32_t version = registerVersion();               \
                                                                                \
-  CEREAL_UNUSED_FUNCTION                                                       \
+  static void unused() { (void) version; }                                     \
 }; /* end Version */                                                           \
                                                                                \
 }                                                                              \