Fixes for ADIOS2 v2.11 (#1804)

* No more changed dimensions in v encoding

* Link to renamed ADIOS2 targets

* Workaround the bug for now

* Revert "Workaround the bug for now"

This reverts commit 4bf7298.

Fixed with ornladios/ADIOS2#4717 and
ornladios/ADIOS2#4718

Author: franzpoeschel

CMakeLists.txt

@@ -544,10 +544,18 @@ endif()
 
 # ADIOS2 Backend
 if(openPMD_HAVE_ADIOS2)
-    if(openPMD_HAVE_MPI)
-        target_link_libraries(openPMD PUBLIC adios2::cxx11_mpi)
+    if(${ADIOS2_VERSION} VERSION_GREATER_EQUAL 2.11.0)
+        if(openPMD_HAVE_MPI)
+            target_link_libraries(openPMD PUBLIC adios2::cxx_mpi)
+        else()
+            target_link_libraries(openPMD PUBLIC adios2::cxx)
+        endif()
     else()
-        target_link_libraries(openPMD PUBLIC adios2::cxx11)
+        if(openPMD_HAVE_MPI)
+            target_link_libraries(openPMD PUBLIC adios2::cxx11_mpi)
+        else()
+            target_link_libraries(openPMD PUBLIC adios2::cxx11)
+        endif()
     endif()
 endif()
 

test/SerialIOTest.cpp

@@ -5853,10 +5853,11 @@ void variableBasedSeries(std::string const &file)
 
             iteration.setAttribute("changing_value", i);
 
-            // this tests changing extents and dimensionalities
-            // across iterations
+            // this tests changing extents across iterations
+            // ADIOS2 does not support changing the dimensionality
+            // (older versions used to somewhat support it, but not really)
             auto E_y = iteration.meshes["E"]["y"];
-            unsigned dimensionality = i % 3 + 1;
+            unsigned dimensionality = 3;
             unsigned len = i + 1;
             Extent changingExtent(dimensionality, len);
             E_y.resetDataset({openPMD::Datatype::INT, changingExtent});
@@ -5984,7 +5985,7 @@ void variableBasedSeries(std::string const &file)
             }
 
             auto E_y = iteration.meshes["E"]["y"];
-            unsigned dimensionality = index % 3 + 1;
+            unsigned dimensionality = 3;
             unsigned len = index + 1;
             Extent changingExtent(dimensionality, len);
             REQUIRE(E_y.getExtent() == changingExtent);