[PMesh] Enabled the compilation of METIS into partmesh

Applications/Utils/PartitionMesh/CMakeLists.txt

+if(UTILS_PARTMESH_BUILD_WITH_METIS)
+	include_directories(${METIS_PATH}/libmetis)
+	include_directories(${METIS_PATH}/programs)
 
-include_directories(
-	${CMAKE_SOURCE_DIR}/Utils/PartitionMesh
-	${CMAKE_SOURCE_DIR}/BaseLib
-	${CMAKE_SOURCE_DIR}/FileIO
-	${CMAKE_SOURCE_DIR}/MeshLib
-)
+	set(METIS_SOURCES
+	  ${METIS_PATH}/programs/mpmetis.c
+	  ${METIS_PATH}/programs/cmdline_mpmetis.c
+	  ${METIS_PATH}/programs/io.c
+	  ${METIS_PATH}/programs/stat.c
+	  metis_main.h
+	)
+	ADD_LIBRARY(METIS_Lib STATIC ${METIS_SOURCES} )
+
+	add_executable(partmesh PartitionMesh.cpp MeshPartitioning.h MeshPartitioning.cpp)
+	set_target_properties(partmesh PROPERTIES FOLDER Utilities)
+	target_link_libraries(partmesh FileIO METIS_Lib metis)
+else()
+	add_executable(partmesh PartitionMesh.cpp MeshPartitioning.h MeshPartitioning.cpp)
+	set_target_properties(partmesh PROPERTIES FOLDER Utilities)
+	target_link_libraries(partmesh FileIO)
+endif()
 
-add_executable(partmesh PartitionMesh.cpp MeshPartitioning.h MeshPartitioning.cpp)
-set_target_properties(partmesh PROPERTIES FOLDER Utilities)
-target_link_libraries(partmesh FileIO)
 ADD_VTK_DEPENDENCY(partmesh)
 
 ####################

Applications/Utils/PartitionMesh/MetisSetup.cmake

+MESSAGE( STATUS "The METIS package is copyrighted by the Regents of the University of Minnesota." )
+MESSAGE( STATUS "Please read the license of the METIS package carefully before you use the METIS." )
+
+add_definitions(-DUSE_GKREGEX)
+
+set(GKLIB_PATH "${METIS_PATH}/GKlib" CACHE PATH "path to GKlib")
+set(SHARED FALSE CACHE BOOL "build a shared library")
+
+if(MSVC)
+	set(METIS_INSTALL FALSE)
+else()
+	set(METIS_INSTALL TRUE)
+endif()
+
+# Configure libmetis library.
+if(SHARED)
+	set(METIS_LIBRARY_TYPE SHARED)
+else()
+	set(METIS_LIBRARY_TYPE STATIC)
+endif(SHARED)
+
+include(${GKLIB_PATH}/GKlibSystem.cmake)
+# Add include directories.
+include_directories(${GKLIB_PATH})
+include_directories(${METIS_PATH}/include)
+# Recursively look for CMakeLists.txt in subdirs.
+add_subdirectory("${METIS_PATH}/include")
+add_subdirectory("${METIS_PATH}/libmetis")

Applications/Utils/PartitionMesh/PartitionMesh.cpp

@@ -16,7 +16,13 @@
 
 #include "logog/include/logog.hpp"
 
-#include "LogogSimpleFormatter.h"
+#ifdef BUILD_WITH_METIS
+extern "C" {
+#include "metis_main.h"
+}
+#endif
+
+#include "BaseLib/LogogSimpleFormatter.h"
 #include "BaseLib/FileTools.h"
 
 #include "MeshLib/IO/readMeshFromFile.h"
@@ -88,14 +94,36 @@ int main (int argc, char* argv[])
         else
         {
             const int num_partitions = nparts.getValue();
+            std::string str_nparts = std::to_string(num_partitions);
+
+            // With the metis source code being compiled
+            if (num_partitions > 1)
+            {
+#ifdef BUILD_WITH_METIS
+                INFO("METIS is running ...");
+                const int argc_m = 4;
+                char *argv_m[argc_m];
+                std::string unsc = "-";	 // Avoid compilation warning by argv_m[0] = "-";
+                argv_m[0] = &unsc[0];
+                std::string option = "-gtype=nodal";
+                argv_m[1] = &option[0];
+                std::string part_mesh_file = file_name_base + ".mesh";
+                argv_m[2] = &part_mesh_file[0];
+                argv_m[3] = &str_nparts[0];
+
+                metis_main(argc_m, argv_m);
+#endif
+            }
 
             INFO("Partitioning the mesh in the node wise way ...");
             // Binary output is default.
-            mesh->partitionByNodeMETIS(file_name_base, num_partitions, !asci_flag.getValue());
+            mesh->partitionByNodeMETIS(file_name_base, num_partitions,
+                                       !asci_flag.getValue());
 
             INFO("Write the mesh with renumbered node indicies into VTU");
             MeshLib::IO::VtuInterface writer(mesh);
-            writer.writeToFile(file_name_base + "_node_id_renumbered_partitions_" + std::to_string(num_partitions) + ".vtu");
+            writer.writeToFile(file_name_base + "_node_id_renumbered_partitions_"
+                               + str_nparts + ".vtu");
         }
     }