From 2f97947e20d26518162657cc51894f455faf1174 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Franz=20P=C3=B6schel?= <franz.poeschel@gmail.com>
Date: Fri, 17 Nov 2023 11:15:06 +0100
Subject: [PATCH] Guard against non-ADIOS2 compilation

---
 include/openPMD/IO/ADIOS/ADIOS2File.hpp | 9 +++++----
 src/IO/ADIOS/ADIOS2File.cpp             | 3 ++-
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/include/openPMD/IO/ADIOS/ADIOS2File.hpp b/include/openPMD/IO/ADIOS/ADIOS2File.hpp
index 12474e23a5..e5d866d42b 100644
--- a/include/openPMD/IO/ADIOS/ADIOS2File.hpp
+++ b/include/openPMD/IO/ADIOS/ADIOS2File.hpp
@@ -23,10 +23,6 @@
 #include "openPMD/IO/ADIOS/ADIOS2Auxiliary.hpp"
 #include "openPMD/IO/AbstractIOHandler.hpp"
 #include "openPMD/IO/IOTask.hpp"
-
-#include <functional>
-#include <string>
-
 #include "openPMD/IO/InvalidatableFile.hpp"
 #include "openPMD/config.hpp"
 
@@ -37,11 +33,15 @@
 #include <mpi.h>
 #endif
 
+#include <functional>
+#include <string>
+
 namespace openPMD
 {
 class ADIOS2IOHandlerImpl;
 }
 
+#if openPMD_HAVE_ADIOS2
 namespace openPMD::detail
 {
 class BufferedActions;
@@ -492,3 +492,4 @@ void BufferedActions::flush(Args &&...args)
     }
 }
 } // namespace openPMD::detail
+#endif
diff --git a/src/IO/ADIOS/ADIOS2File.cpp b/src/IO/ADIOS/ADIOS2File.cpp
index 458c56472a..e0874276a7 100644
--- a/src/IO/ADIOS/ADIOS2File.cpp
+++ b/src/IO/ADIOS/ADIOS2File.cpp
@@ -43,6 +43,7 @@
             throw std::runtime_error((TEXT));                                  \
     }
 
+#if openPMD_HAVE_ADIOS2
 namespace openPMD::detail
 {
 template <typename T>
@@ -1314,5 +1315,5 @@ void BufferedActions::markActive(Writable *writable)
     break;
     }
 }
-
 } // namespace openPMD::detail
+#endif