Added METIS test.

[[Imported from SVN: r6945]]

cmake/modules/FindMETIS.cmake

+# Accepts the following variables:
+#
+# METIS_DIR: Prefix where ParMETIS is installed.
+# METIS_LIB_NAME: Name of the METIS library (default: metis).
+# METIS_LIBRARY: Full path of the METIS library.
+
+# Sets the following variables:
+#
+# METIS_LIBRARY: Full path of the METIS library.
+# METIS_FOUND: True if ParMETIS was found.
+# METIS_LIBRARIES: List of all libraries needed for linking with METIS,
+#
+# Provides the following macros:
+#
+# find_package(METIS)
+#
+# Searches for METIS (See above)
+#
+#
+# add_dune_metis_flags(TARGETS)
+#
+# Adds the necessary flags to comile and link TARGETS with ParMETIS support.
+#
+find_path(METIS_INCLUDE_DIRS metis.h PATHS ${METIS_DIR}
+  PATH_SUFFIXES metis NO_DEFAULT_PATH
+  DOC "Include directory of metis")
+find_path(METIS_INCLUDE_DIRS metis.h PATH_SUFFIXES metis)
+set(METIS_LIBRARY METIS_LIBRARY-NOTFOUND CACHE FILEPATH "Full path of the METIS library")
+
+include(CMakePushCheckState)
+
+cmake_push_check_state() # Save variables
+set(CMAKE_REQUIRED_INCLUDES ${CMAKE_REQUIRED_INCLUDES} ${METIS_INCLUDE_DIRS})
+check_include_file(metis.h METIS_FOUND)
+if(NOT METIS_LIB_NAME)
+  set(METIS_LIB_NAME metis)
+endif(NOT METIS_LIB_NAME)
+
+find_library(METIS_LIBRARY ${METIS_LIB_NAME} PATHS ${ParMETIS_DIR}
+  PATH_SUFFIXES lib NO_DEFAULT_PATH)
+find_library(METIS_LIBRARY ${METIS_LIB_NAME})
+
+if(METIS_LIBRARY)
+  set(METIS_LIBRARIES ${METIS_LIBRARY})
+  list(APPEND CMAKE_REQUIRED_LIBRARIES ${METIS_LIBRARIES})
+  include(CheckSymbolExists)
+  check_symbol_exists(METIS_PartMeshDual metis.h METIS_FOUND)
+endif(METIS_LIBRARY)
+cmake_pop_check_state()
+
+if(METIS_FOUND)
+  message(STATUS "METIS found. Include directories are ${METIS_INCLUDE_DIRS} and libraries are ${METIS_LIBRARIES}")
+else(METIS_FOUND)
+  message(WARNING "No functional METIS found.")
+endif(METIS_FOUND)
+
+function(add_dune_metis_flags _targets)
+  if(METIS_FOUND)
+    foreach(_target ${_targets})
+      target_link_libraries(${_target} ${METIS_LIBRARY})
+    endforeach(_target ${_targets})
+    set_property(TARGET ${_targets} APPEND PROPERTIES
+      COMPILE_DIRECTORIES ${METIS_INCLUDE_DIRS})
+  endif(METIS_FOUND)
+endfunction(add_dune_metis_flags _targets)