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# Module that checks whether PT-Scotch is available.
#
# Accepts the following variables:
#
# PTSCOTCH_ROOT: Prefix where PT-Scotch is installed.
# PTSCOTCH_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/scotch-${PTSCOTCH_SUFFIX, and
# lib/scotch-${PTSCOTCH_SUFFIX}, respectively.
# Sets the following variables:
# PTSCOTCH_INCLUDE_DIRS: All include directories needed to compile PT-Scotch programs.
# PTSCOTCH_LIBRARIES: Alle libraries needed to link PT-Scotch programs.
# PTSCOTCH_FOUND: True if PT-Scotch was found.
#
# Provides the following macros:
#
# find_package(PTScotch)
find_package(MPI)
macro(_search_pt_lib libvar libname doc)
find_library(${libvar} ${libname}
PATHS ${PTSCOTCH_ROOT} ${PTSCOTCH_ROOT}/lib PATH_SUFFIXES ${PATH_SUFFIXES}
NO_DEFAULT_PATH
DOC "${doc}")
find_library(${libvar} ${libname})
endmacro(_search_pt_lib)
if(PTSCOTCH_SUFFIX)
set(PATH_SUFFIXES "scotch-${PTSCOTCH_SUFFIX}")
else(PTSCOTCH_SUFFIX)
set(PATH_SUFFIXES "scotch")
endif(PTSCOTCH_SUFFIX)
include(CMakePushCheckState)
cmake_push_check_state() # Save variables
set(CMAKE_REQUIRED_INCLUDES ${CMAKE_REQUIRED_INCLUDES} ${MPI_DUNE_INCLUDE_PATH})
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${MPI_DUNE_COMPILE_FLAGS}")
find_path(PTSCOTCH_INCLUDE_DIR ptscotch.h
PATHS ${PTSCOTCH_ROOT} ${PTSCOTCH_ROOT}/include
PATH_SUFFIXES ${PATH_SUFFIXES}
NO_DEFAULT_PATH
DOC "Include directory of PT-Scotch")
find_path(PTSCOTCH_INCLUDE_DIR ptscotch.h
PATH_SUFFIXES ${PATH_SUFFIXES})
_search_pt_lib(SCOTCH_LIBRARY scotch "The main Scotch library.")
_search_pt_lib(PTSCOTCH_LIBRARY ptscotch "The main PT-Scotch library.")
_search_pt_lib(PTSCOTCHERR_LIBRARY ptscotcherr "The PT-Scotch error library.")
# behave like a CMake module is supposed to behave
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(
"PTScotch"
DEFAULT_MSG
PTSCOTCH_INCLUDE_DIR
SCOTCH_LIBRARY
PTSCOTCH_LIBRARY
PTSCOTCHERR_LIBRARY
)
#restore old values
cmake_pop_check_state()
if(PTSCOTCH_FOUND)
set(PTSCOTCH_INCLUDE_DIRS ${PTSCOTCH_INCLUDE_DIR})
set(PTSCOTCH_LIBRARIES ${SCOTCH_LIBRARY} ${PTSCOTCH_LIBRARY} ${PTSCOTCHERR_LIBRARY} ${MPI_DUNE_LIBRARIES}
CACHE FILEPATH "All libraries needed to link programs using PT-Scotch")
set(PTSCOCH_LINK_FLAGS "${DUNE_MPI_LINK_FLAGS}"
CACHE STRING "PT-Scotch link flags")
set(HAVE_PTSCOTCH 1)
if(NOT TARGET PTScotch::Scotch)
add_library(PTScotch::Scotch UNKNOWN IMPORTED GLOBAL)
set_target_properties(PTScotch::Scotch PROPERTIES
IMPORTED_LOCATION "${SCOTCH_LIBRARY}"
INCLUDE_DIRECTORIES "${PTSCOTCH_INCLUDE_DIRS}"
INTERFACE_LINK_LIBRARIES "${PTSCOTCHERR_LIBRARY}")
endif()
if(NOT TARGET PTScotch::PTScotch)
add_library(PTScotch::PTScotch UNKNOWN IMPORTED GLOBAL)
set_target_properties(PTScotch::PTScotch PROPERTIES
IMPORTED_LOCATION "${PTSCOTCH_LIBRARY}"
INCLUDE_DIRECTORIES "${PTSCOTCH_INCLUDE_DIRS}"
INTERFACE_LINK_LIBRARIES "PTScotch::Scotch;${MPI_DUNE_LIBRARIES}")
endif()
# log result
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
"Determing location of PT-Scotch succeded:\n"
"Include directory: ${PTSCOTCH_INCLUDE_DIRS}\n"
"Library directory: ${PTSCOTCH_LIBRARIES}\n\n")
endif(PTSCOTCH_FOUND)
mark_as_advanced(PTSCOTCH_INCLUDE_DIRS PTSCOTCH_LIBRARIES HAVE_PTSCOTCH)
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