Fix MPI build

CMakeLists.txt

@@ -287,13 +287,20 @@ if (USE_PYTHON)
 endif (USE_PYTHON)
 
 #######################################################################
+add_library(netgen_mpi INTERFACE)
+add_library(netgen_metis INTERFACE)
 if (USE_MPI)
     find_package(MPI REQUIRED)
+    target_include_directories(netgen_mpi INTERFACE ${MPI_CXX_INCLUDE_PATH})
+    target_link_libraries(netgen_mpi INTERFACE ${MPI_mpi_LIBRARY} ${MPI_CXX_LIBRARIES} )
+    target_compile_definitions(netgen_mpi INTERFACE PARALLEL )
+
     find_package(METIS REQUIRED)
-    add_definitions(-DPARALLEL -DMETIS)
-    include_directories(${MPI_CXX_INCLUDE_PATH})
-    include_directories(${METIS_INCLUDE_DIR})
+    target_include_directories(netgen_metis INTERFACE ${METIS_INCLUDE_DIR})
+    target_link_libraries(netgen_metis INTERFACE ${METIS_LIBRARY} )
+    target_compile_definitions(netgen_metis INTERFACE METIS )
 endif (USE_MPI)
+install(TARGETS netgen_mpi netgen_metis ${NG_INSTALL_DIR})
 
 #######################################################################
 if (USE_OCC)

libsrc/core/CMakeLists.txt

@@ -39,6 +39,7 @@ if(USE_PYTHON)
   target_include_directories(ngcore PRIVATE ${PYTHON_INCLUDE_DIRS})
   target_link_libraries(ngcore PRIVATE ${PYTHON_LIBRARIES})
 endif(USE_PYTHON)
+target_link_libraries(ngcore PUBLIC netgen_mpi)
 
 install(FILES ngcore.hpp archive.hpp type_traits.hpp version.hpp ngcore_api.hpp logging.hpp
   exception.hpp symboltable.hpp paje_trace.hpp utils.hpp profiler.hpp mpi_wrapper.hpp

libsrc/core/mpi_wrapper.hpp

@@ -6,6 +6,7 @@
 #include <mpi.h>
 #endif
 
+#include "exception.hpp"
 
 namespace ngcore
 {
@@ -191,7 +192,7 @@ namespace ngcore
   };
 
   
-#else
+#else // PARALLEL
   class MPI_Comm {
     int nr;
   public:
@@ -240,7 +241,7 @@ namespace ngcore
     void Bcast (T & s, int root = 0) const { ; } 
   };  
   
-#endif
+#endif // PARALLEL
 
 
 
@@ -252,5 +253,5 @@ namespace ngcore
   
 }
 
-#endif
+#endif // NGCORE_MPIWRAPPER_HPP
 

libsrc/core/taskmanager.cpp

@@ -10,6 +10,7 @@
 #include <chrono>
 
 #include "concurrentqueue.h"
+#include "mpi_wrapper.hpp"
 #include "paje_trace.hpp"
 #include "profiler.hpp"
 #include "taskmanager.hpp"

libsrc/meshing/CMakeLists.txt

@@ -23,7 +23,7 @@ endif(APPLE)
 
 target_link_libraries( mesh PUBLIC ngcore PRIVATE gprim la gen )
 
-target_link_libraries( mesh PRIVATE ${ZLIB_LIBRARIES} ${MPI_CXX_LIBRARIES} ${PYTHON_LIBRARIES} ${METIS_LIBRARY})
+target_link_libraries( mesh PRIVATE netgen_metis ${ZLIB_LIBRARIES} ${PYTHON_LIBRARIES} )
 if(NOT WIN32)
   install( TARGETS mesh ${NG_INSTALL_DIR})
 endif(NOT WIN32)