ExternalProject_Add(project_metis 
    PREFIX ${CMAKE_INSTALL_PREFIX}
    GIT_REPOSITORY ${METIS_URL}
    STAMP_DIR  ${METIS_BINARY_DIR}/stamp
    SOURCE_DIR ${METIS_SOURCE_DIR}
    BINARY_DIR ${METIS_BINARY_DIR}
    TMP_DIR    ${METIS_BINARY_DIR}/tmp
    UPDATE_COMMAND "" 
    CMAKE_ARGS 
      -D PCRE=${METIS_PCRE}
      -D GKREGEX=${METIS_GKREGEX}
      -D CMAKE_C_COMPILER=${CMAKE_C_COMPILER}
      -D CMAKE_C_FLAGS=${CMAKE_C_FLAGS}
      -D CMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX}
      -D BUILD_SHARED_LIBS=${BUILD_SHARED_LIBS}
      -D CMAKE_EXECUTABLE_SUFFIX_C=${CMAKE_EXECUTABLE_SUFFIX_C}
      -D CMAKE_MACOSX_RPATH=${CMAKE_MACOSX_RPATH}
      -D CMAKE_SKIP_BUILD_RPATH=${CMAKE_SKIP_BUILD_RPATH}
      -D CMAKE_BUILD_WITH_INSTALL_RPATH=${CMAKE_BUILD_WITH_INSTALL_RPATH}
      -D CMAKE_INSTALL_RPATH_USE_LINK_PATH=${CMAKE_INSTALL_RPATH_USE_LINK_PATH} 
      -D CMAKE_INSTALL_RPATH=${CMAKE_INSTALL_RPATH}
    INSTALL_DIR ${CMAKE_INSTALL_PREFIX}
  )

set(CMAKE_EXECUTABLE_SUFFIX_C       ".elf")