From 28cb6832144caee1c71eff9dbf236e630abed76b Mon Sep 17 00:00:00 2001
From: Axel Huebl <axel.huebl@plasma.ninja>
Date: Wed, 9 Aug 2023 16:36:01 -0700
Subject: [PATCH] ADIOS 2.9: Avoid Unused Param Warning

Fix a new warning.
---
 src/IO/ADIOS/ADIOS2IOHandler.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/IO/ADIOS/ADIOS2IOHandler.cpp b/src/IO/ADIOS/ADIOS2IOHandler.cpp
index 1349e3b1f4..a9af92e4a0 100644
--- a/src/IO/ADIOS/ADIOS2IOHandler.cpp
+++ b/src/IO/ADIOS/ADIOS2IOHandler.cpp
@@ -1824,6 +1824,7 @@ namespace detail
         auto defineAttribute =
             [&IO, &fullName, &modifiable, &impl](auto const &...args) {
 #if openPMD_HAS_ADIOS_2_9
+                (void)impl;
                 auto attr = IO.DefineAttribute(
                     fullName,
                     args...,