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# Module that checks whether ParMETIS or the ParMETIS interface of PT-Scotch
# is available.
#
# Accepts the following variables:
#
# PARMETIS_ROOT: Prefix where ParMETIS is installed.
# PARMETIS_SUFFIX: Scotch might be compiled using different
# integer sizes (int32, int32, long). When
# this is is set the headers and libaries
# are search under the suffix
# include/parmetis-${PARMETIS_SUFFIX}, and
# lib/parmetis-${PARMETIS_SUFFIX}, respectively.
# Sets the following variables:
# PARMETIS_INCLUDE_DIRS: All include directories needed to compile ParMETIS programs.
# PARMETIS_LIBRARIES: Alle libraries needed to link ParMETIS programs.
# PARMETIS_FOUND: True if ParMETIS was found.
#
# Provides the following macros:
#
# find_package(ParMETIS)
find_package(MPI)
if(MPI_C_FOUND)
macro(_search_parmetis_lib libvar libname doc)
find_library(${libvar} ${libname}
PATHS ${PARMETIS_ROOT} ${PARMETIS_ROOT}/lib PATH_SUFFIXES ${PATH_SUFFIXES}
NO_DEFAULT_PATH
DOC "${doc}")
find_library(${libvar} ${libname})
endmacro(_search_parmetis_lib)
if(PARMETIS_SUFFIX)
set(PATH_SUFFIXES "-${PARMETIS_SUFFIX}")
else(PARMETIS_SUFFIX)
set(PATH_SUFFIXES "")
endif(PARMETIS_SUFFIX)
include(CMakePushCheckState)
cmake_push_check_state() # Save variables
find_path(PARMETIS_INCLUDE_DIR parmetis.h
PATHS ${PARMETIS_ROOT} ${PARMETIS_ROOT}/include
PATH_SUFFIXES parmetis${PATH_SUFFIXES}
NO_DEFAULT_PATH
DOC "Include directory of ParMETIS")
find_path(PARMETIS_INCLUDE_DIR parmetis.h
PATH_SUFFIXES parmetis${PATH_SUFFIXES})
# find the serial version of METIS
find_package(METIS)
set(CMAKE_REQUIRED_INCLUDES ${CMAKE_REQUIRED_INCLUDES} ${MPI_C_INCLUDE_PATH} )
if(PARMETIS_INCLUDE_DIR)
set(CMAKE_REQUIRED_INCLUDES ${CMAKE_REQUIRED_INCLUDES} ${PARMETIS_INCLUDE_DIR})
if(METIS_INCLUDE_DIRS)
set(CMAKE_REQUIRED_INCLUDES ${CMAKE_REQUIRED_INCLUDES} ${METIS_INCLUDE_DIRS})
endif()
endif()
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${MPI_C_COMPILE_FLAGS}")
include(CheckIncludeFile)
check_include_file(parmetis.h PARMETIS_FOUND)
if(NOT PARMETIS_FOUND)
# If we are using the ParMETIS bindings of PTScotch, we need
# to use the scotch include path as partmetis.h includes scotch.h
find_package(PTScotch)
set(CMAKE_REQUIRED_INCLUDES ${CMAKE_REQUIRED_INCLUDES} ${PTSCOTCH_INCLUDE_DIR})
unset(PARMETIS_FOUND CACHE) # force recheck of include file
check_include_file(parmetis.h PARMETIS_FOUND)
if(PARMETIS_FOUND)
set(PARMETIS_SCOTCH_INCLUDE_DIRS ${PTSCOTCH_INCLUDE_DIRS})
endif()
endif()
_search_parmetis_lib(PARMETIS_LIBRARY parmetis "The main ParMETIS library.")
# behave like a CMake module is supposed to behave
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(
"ParMETIS"
DEFAULT_MSG
PARMETIS_INCLUDE_DIR
PARMETIS_LIBRARY
METIS_LIBRARIES
PARMETIS_FOUND
METIS_FOUND
)
#restore old values
cmake_pop_check_state()
if(PARMETIS_FOUND)
set(PARMETIS_INCLUDE_DIRS ${PARMETIS_INCLUDE_DIR} ${PARMETIS_SCOTCH_INCLUDE_DIRS})
set(PARMETIS_LIBRARIES ${PARMETIS_LIBRARY} ${METIS_LIBRARIES} ${MPI_C_LIBRARIES}
CACHE FILEPATH "All libraries needed to link programs using ParMETIS")
set(PARMETIS_LINK_FLAGS "${DUNE_C_LINK_FLAGS}"
CACHE STRING "ParMETIS link flags")
set(HAVE_PARMETIS 1)
# log result
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
"Determining location of ParMETIS succeded:\n"
"Include directory: ${PARMETIS_INCLUDE_DIRS}\n"
"Library directory: ${PARMETIS_LIBRARIES}\n\n")
if(NOT TARGET ParMETIS::ParMETIS)
add_library(ParMETIS::ParMETIS UNKNOWN IMPORTED GLOBAL)
set_target_properties(ParMETIS::ParMETIS PROPERTIES
IMPORTED_LOCATION ${PARMETIS_LIBRARY}
INCLUDE_DIRECTORIES "${PARMETIS_INCLUDE_DIRS}"
INTERFACE_LINK_LIBRARIES "${METIS_LIBRARIES};${MPI_C_LIBRARIES}")
endif()
endif(PARMETIS_FOUND)
mark_as_advanced(PARMETIS_INCLUDE_DIRS PARMETIS_LIBRARIES HAVE_PARMETIS)
else(MPI_C_FOUND)
message(WARNING "MPI not found ==> ParMETIS disabled! Plase make sure -DUSE_MPI=ON was set if you need ParMETIS.")
endif(MPI_C_FOUND)
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