Only use -qopenmp on Intel 17 and higher as it is broken in 15 and 16.

CMakeLists.txt

@@ -961,7 +961,7 @@ option ( WALBERLA_THREAD_SAFE_LOGGING "Enables/Disables thread-safe logging" ON
 
 if ( WALBERLA_BUILD_WITH_OPENMP )
     if ( WALBERLA_CXX_COMPILER_IS_INTEL )
-       if( CMAKE_CXX_COMPILER_VERSION VERSION_LESS "15.0" )
+       if( CMAKE_CXX_COMPILER_VERSION VERSION_LESS "17.0" )
           add_flag ( CMAKE_C_FLAGS   "-openmp" )
           add_flag ( CMAKE_CXX_FLAGS "-openmp" )
        else()