# Distributed under the OSI-approved BSD 3-Clause License. See accompanying # file Copyright.txt or https://cmake.org/licensing for details. #[=======================================================================[.rst: FindLAPACK ---------- Find Linear Algebra PACKage (LAPACK) library This module finds an installed Fortran library that implements the LAPACK linear-algebra interface (see http://www.netlib.org/lapack/). The approach follows that taken for the ``autoconf`` macro file, ``acx_lapack.m4`` (distributed at http://ac-archive.sourceforge.net/ac-archive/acx_lapack.html). Input Variables ^^^^^^^^^^^^^^^ The following variables may be set to influence this module's behavior: ``BLA_STATIC`` if ``ON`` use static linkage ``BLA_VENDOR`` If set, checks only the specified vendor, if not set checks all the possibilities. List of vendors valid in this module: * ``OpenBLAS`` * ``FLAME`` * ``Intel10_32`` (intel mkl v10 32 bit) * ``Intel10_64lp`` (intel mkl v10+ 64 bit, threaded code, lp64 model) * ``Intel10_64lp_seq`` (intel mkl v10+ 64 bit, sequential code, lp64 model) * ``Intel10_64ilp`` (intel mkl v10+ 64 bit, threaded code, ilp64 model) * ``Intel10_64ilp_seq`` (intel mkl v10+ 64 bit, sequential code, ilp64 model) * ``Intel10_64_dyn`` (intel mkl v10+ 64 bit, single dynamic library) * ``Intel`` (obsolete versions of mkl 32 and 64 bit) * ``ACML`` * ``Apple`` * ``NAS`` * ``Arm`` * ``Arm_mp`` * ``Arm_ilp64`` * ``Arm_ilp64_mp`` * ``Generic`` ``BLA_F95`` if ``ON`` tries to find the BLAS95/LAPACK95 interfaces Imported targets ^^^^^^^^^^^^^^^^ This module defines the following :prop_tgt:`IMPORTED` target: ``LAPACK::LAPACK`` The libraries to use for LAPACK, if found. Result Variables ^^^^^^^^^^^^^^^^ This module defines the following variables: ``LAPACK_FOUND`` library implementing the LAPACK interface is found ``LAPACK_LINKER_FLAGS`` uncached list of required linker flags (excluding ``-l`` and ``-L``). ``LAPACK_LIBRARIES`` uncached list of libraries (using full path name) to link against to use LAPACK ``LAPACK95_LIBRARIES`` uncached list of libraries (using full path name) to link against to use LAPACK95 ``LAPACK95_FOUND`` library implementing the LAPACK95 interface is found .. note:: C, CXX or Fortran must be enabled to detect a BLAS/LAPACK library. C or CXX must be enabled to use Intel Math Kernel Library (MKL). For example, to use Intel MKL libraries and/or Intel compiler: .. code-block:: cmake set(BLA_VENDOR Intel10_64lp) find_package(LAPACK) #]=======================================================================] # Check the language being used if(NOT (CMAKE_C_COMPILER_LOADED OR CMAKE_CXX_COMPILER_LOADED OR CMAKE_Fortran_COMPILER_LOADED)) if(LAPACK_FIND_REQUIRED) message(FATAL_ERROR "FindLAPACK requires Fortran, C, or C++ to be enabled.") else() message(STATUS "Looking for LAPACK... - NOT found (Unsupported languages)") return() endif() endif() if(CMAKE_Fortran_COMPILER_LOADED) include(${CMAKE_ROOT}/Modules/CheckFortranFunctionExists.cmake) else() include(${CMAKE_ROOT}/Modules/CheckFunctionExists.cmake) endif() include(${CMAKE_ROOT}/Modules/CMakePushCheckState.cmake) cmake_push_check_state() set(CMAKE_REQUIRED_QUIET ${LAPACK_FIND_QUIETLY}) set(LAPACK_FOUND FALSE) set(LAPACK95_FOUND FALSE) set(_lapack_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES}) if(BLA_STATIC) if(WIN32) set(CMAKE_FIND_LIBRARY_SUFFIXES .lib ${CMAKE_FIND_LIBRARY_SUFFIXES}) else() set(CMAKE_FIND_LIBRARY_SUFFIXES .a ${CMAKE_FIND_LIBRARY_SUFFIXES}) endif() else() if(CMAKE_SYSTEM_NAME STREQUAL "Linux") # for ubuntu's libblas3gf and liblapack3gf packages set(CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES} .so.3gf) endif() endif() # TODO: move this stuff to a separate module macro(CHECK_LAPACK_LIBRARIES LIBRARIES _prefix _name _flags _list _threadlibs _addlibdir _subdirs _blas) # This macro checks for the existence of the combination of fortran libraries # given by _list. If the combination is found, this macro checks (using the # Check_Fortran_Function_Exists macro) whether can link against that library # combination using the name of a routine given by _name using the linker # flags given by _flags. If the combination of libraries is found and passes # the link test, LIBRARIES is set to the list of complete library paths that # have been found. Otherwise, LIBRARIES is set to FALSE. # N.B. _prefix is the prefix applied to the names of all cached variables that # are generated internally and marked advanced by this macro. # _addlibdir is a list of additional search paths. _subdirs is a list of path # suffixes to be used by find_library(). set(_libraries_work TRUE) set(${LIBRARIES}) set(_combined_name) set(_extaddlibdir "${_addlibdir}") if(WIN32) list(APPEND _extaddlibdir ENV LIB) elseif(APPLE) list(APPEND _extaddlibdir ENV DYLD_LIBRARY_PATH) else() list(APPEND _extaddlibdir ENV LD_LIBRARY_PATH) endif() list(APPEND _extaddlibdir "${CMAKE_C_IMPLICIT_LINK_DIRECTORIES}") foreach(_library ${_list}) if(_library MATCHES "^-Wl,--(start|end)-group$") # Respect linker flags like --start/end-group (required by MKL) set(${LIBRARIES} ${${LIBRARIES}} "${_library}") else() set(_combined_name ${_combined_name}_${_library}) if(_libraries_work) find_library(${_prefix}_${_library}_LIBRARY NAMES ${_library} PATHS ${_extaddlibdir} PATH_SUFFIXES ${_subdirs} ) #message("DEBUG: find_library(${_library}) got ${${_prefix}_${_library}_LIBRARY}") mark_as_advanced(${_prefix}_${_library}_LIBRARY) set(${LIBRARIES} ${${LIBRARIES}} ${${_prefix}_${_library}_LIBRARY}) set(_libraries_work ${${_prefix}_${_library}_LIBRARY}) endif() endif() endforeach() if(_libraries_work) # Test this combination of libraries. set(CMAKE_REQUIRED_LIBRARIES ${_flags} ${${LIBRARIES}} ${_blas} ${_threadlibs}) #message("DEBUG: CMAKE_REQUIRED_LIBRARIES = ${CMAKE_REQUIRED_LIBRARIES}") if(CMAKE_Fortran_COMPILER_LOADED) check_fortran_function_exists("${_name}" ${_prefix}${_combined_name}_WORKS) else() check_function_exists("${_name}_" ${_prefix}${_combined_name}_WORKS) endif() set(CMAKE_REQUIRED_LIBRARIES) set(_libraries_work ${${_prefix}${_combined_name}_WORKS}) endif() if(_libraries_work) if("${_list}${_blas}" STREQUAL "") set(${LIBRARIES} "${LIBRARIES}-PLACEHOLDER-FOR-EMPTY-LIBRARIES") else() set(${LIBRARIES} ${${LIBRARIES}} ${_blas} ${_threadlibs}) endif() else() set(${LIBRARIES} FALSE) endif() #message("DEBUG: ${LIBRARIES} = ${${LIBRARIES}}") endmacro() set(LAPACK_LINKER_FLAGS) set(LAPACK_LIBRARIES) set(LAPACK95_LIBRARIES) if(LAPACK_FIND_QUIETLY OR NOT LAPACK_FIND_REQUIRED) find_package(BLAS) else() find_package(BLAS REQUIRED) endif() if(BLAS_FOUND) set(LAPACK_LINKER_FLAGS ${BLAS_LINKER_FLAGS}) if(NOT $ENV{BLA_VENDOR} STREQUAL "") set(BLA_VENDOR $ENV{BLA_VENDOR}) else() if(NOT BLA_VENDOR) set(BLA_VENDOR "All") endif() endif() # LAPACK in the Intel MKL 10+ library? if(BLA_VENDOR MATCHES "Intel" OR BLA_VENDOR STREQUAL "All") if(NOT LAPACK_LIBRARIES) if(CMAKE_C_COMPILER_LOADED OR CMAKE_CXX_COMPILER_LOADED) # System-specific settings if(NOT WIN32) set(LAPACK_mkl_LM "-lm") set(LAPACK_mkl_LDL "-ldl") endif() if(LAPACK_FIND_QUIETLY OR NOT LAPACK_FIND_REQUIRED) find_package(Threads) else() find_package(Threads REQUIRED) endif() if(BLA_VENDOR MATCHES "_64ilp") set(LAPACK_mkl_ILP_MODE "ilp64") else() set(LAPACK_mkl_ILP_MODE "lp64") endif() set(LAPACK_SEARCH_LIBS "") if(BLA_F95) set(LAPACK_mkl_SEARCH_SYMBOL "cheev_f95") set(_LIBRARIES LAPACK95_LIBRARIES) set(_BLAS_LIBRARIES ${BLAS95_LIBRARIES}) # old list(APPEND LAPACK_SEARCH_LIBS "mkl_lapack95") # new >= 10.3 list(APPEND LAPACK_SEARCH_LIBS "mkl_intel_c") list(APPEND LAPACK_SEARCH_LIBS "mkl_lapack95_${LAPACK_mkl_ILP_MODE}") else() set(LAPACK_mkl_SEARCH_SYMBOL "cheev") set(_LIBRARIES LAPACK_LIBRARIES) set(_BLAS_LIBRARIES ${BLAS_LIBRARIES}) # old and new >= 10.3 list(APPEND LAPACK_SEARCH_LIBS "mkl_lapack") endif() # MKL uses a multitude of partially platform-specific subdirectories: if(BLA_VENDOR STREQUAL "Intel10_32") set(LAPACK_mkl_ARCH_NAME "ia32") else() set(LAPACK_mkl_ARCH_NAME "intel64") endif() if(WIN32) set(LAPACK_mkl_OS_NAME "win") elseif(APPLE) set(LAPACK_mkl_OS_NAME "mac") else() set(LAPACK_mkl_OS_NAME "lin") endif() if(DEFINED ENV{MKLROOT}) file(TO_CMAKE_PATH "$ENV{MKLROOT}" LAPACK_mkl_MKLROOT) # If MKLROOT points to the subdirectory 'mkl', use the parent directory instead # so we can better detect other relevant libraries in 'compiler' or 'tbb': get_filename_component(LAPACK_mkl_MKLROOT_LAST_DIR "${LAPACK_mkl_MKLROOT}" NAME) if(LAPACK_mkl_MKLROOT_LAST_DIR STREQUAL "mkl") get_filename_component(LAPACK_mkl_MKLROOT "${LAPACK_mkl_MKLROOT}" DIRECTORY) endif() endif() set(LAPACK_mkl_LIB_PATH_SUFFIXES "compiler/lib" "compiler/lib/${LAPACK_mkl_ARCH_NAME}_${LAPACK_mkl_OS_NAME}" "mkl/lib" "mkl/lib/${LAPACK_mkl_ARCH_NAME}_${LAPACK_mkl_OS_NAME}" "lib/${LAPACK_mkl_ARCH_NAME}_${LAPACK_mkl_OS_NAME}") # First try empty lapack libs if(NOT ${_LIBRARIES}) check_lapack_libraries( ${_LIBRARIES} LAPACK ${LAPACK_mkl_SEARCH_SYMBOL} "" "" "${CMAKE_THREAD_LIBS_INIT};${LAPACK_mkl_LM};${LAPACK_mkl_LDL}" "${LAPACK_mkl_MKLROOT}" "${LAPACK_mkl_LIB_PATH_SUFFIXES}" "${_BLAS_LIBRARIES}" ) endif() # Then try the search libs foreach(IT ${LAPACK_SEARCH_LIBS}) string(REPLACE " " ";" SEARCH_LIBS ${IT}) if(NOT ${_LIBRARIES}) check_lapack_libraries( ${_LIBRARIES} LAPACK ${LAPACK_mkl_SEARCH_SYMBOL} "" "${SEARCH_LIBS}" "${CMAKE_THREAD_LIBS_INIT};${LAPACK_mkl_LM};${LAPACK_mkl_LDL}" "${LAPACK_mkl_MKLROOT}" "${LAPACK_mkl_LIB_PATH_SUFFIXES}" "${_BLAS_LIBRARIES}" ) endif() endforeach() unset(LAPACK_mkl_ILP_MODE) unset(LAPACK_mkl_SEARCH_SYMBOL) unset(LAPACK_mkl_LM) unset(LAPACK_mkl_LDL) unset(LAPACK_mkl_MKLROOT) unset(LAPACK_mkl_ARCH_NAME) unset(LAPACK_mkl_OS_NAME) unset(LAPACK_mkl_LIB_PATH_SUFFIXES) endif() endif() endif() # gotoblas? (http://www.tacc.utexas.edu/tacc-projects/gotoblas2) if(BLA_VENDOR STREQUAL "Goto" OR BLA_VENDOR STREQUAL "All") if(NOT LAPACK_LIBRARIES) check_lapack_libraries( LAPACK_LIBRARIES LAPACK cheev "" "goto2" "" "" "" "${BLAS_LIBRARIES}" ) endif() endif() # OpenBLAS? (http://www.openblas.net) if(BLA_VENDOR STREQUAL "OpenBLAS" OR BLA_VENDOR STREQUAL "All") if(NOT LAPACK_LIBRARIES) check_lapack_libraries( LAPACK_LIBRARIES LAPACK cheev "" "openblas" "" "" "" "${BLAS_LIBRARIES}" ) endif() endif() # ArmPL? (https://developer.arm.com/tools-and-software/server-and-hpc/compile/arm-compiler-for-linux/arm-performance-libraries) if(BLA_VENDOR MATCHES "Arm" OR BLA_VENDOR STREQUAL "All") # Check for 64bit Integer support if(BLA_VENDOR MATCHES "_ilp64") set(LAPACK_armpl_LIB "armpl_ilp64") else() set(LAPACK_armpl_LIB "armpl_lp64") endif() # Check for OpenMP support, VIA BLA_VENDOR of Arm_mp or Arm_ipl64_mp if(BLA_VENDOR MATCHES "_mp") set(LAPACK_armpl_LIB "${LAPACK_armpl_LIB}_mp") endif() if(NOT LAPACK_LIBRARIES) check_lapack_libraries( LAPACK_LIBRARIES LAPACK cheev "" "${LAPACK_armpl_LIB}" "" "" "" "${BLAS_LIBRARIES}" ) endif() endif() # FLAME's blis library? (https://github.com/flame/blis) if(BLA_VENDOR STREQUAL "FLAME" OR BLA_VENDOR STREQUAL "All") if(NOT LAPACK_LIBRARIES) check_lapack_libraries( LAPACK_LIBRARIES LAPACK cheev "" "flame" "" "" "" "${BLAS_LIBRARIES}" ) endif() endif() # BLAS in acml library? if(BLA_VENDOR MATCHES "ACML" OR BLA_VENDOR STREQUAL "All") if(BLAS_LIBRARIES MATCHES ".+acml.+") set(LAPACK_LIBRARIES ${BLAS_LIBRARIES}) endif() endif() # Apple LAPACK library? if(BLA_VENDOR STREQUAL "Apple" OR BLA_VENDOR STREQUAL "All") if(NOT LAPACK_LIBRARIES) check_lapack_libraries( LAPACK_LIBRARIES LAPACK cheev "" "Accelerate" "" "" "" "${BLAS_LIBRARIES}" ) endif() endif() # Apple NAS (vecLib) library? if(BLA_VENDOR STREQUAL "NAS" OR BLA_VENDOR STREQUAL "All") if(NOT LAPACK_LIBRARIES) check_lapack_libraries( LAPACK_LIBRARIES LAPACK cheev "" "vecLib" "" "" "" "${BLAS_LIBRARIES}" ) endif() endif() # Generic LAPACK library? if(BLA_VENDOR STREQUAL "Generic" OR BLA_VENDOR STREQUAL "ATLAS" OR BLA_VENDOR STREQUAL "All") if(NOT LAPACK_LIBRARIES) check_lapack_libraries( LAPACK_LIBRARIES LAPACK cheev "" "lapack" "" "" "" "${BLAS_LIBRARIES}" ) endif() if(NOT LAPACK_LIBRARIES AND NOT WIN32) check_lapack_libraries( LAPACK_LIBRARIES LAPACK cheev "" "lapack;-lm;-lgfortran" "" "" "" "${BLAS_LIBRARIES}" ) endif() endif() else() message(STATUS "LAPACK requires BLAS") endif() if(BLA_F95) if(LAPACK95_LIBRARIES) set(LAPACK95_FOUND TRUE) else() set(LAPACK95_FOUND FALSE) endif() if(NOT LAPACK_FIND_QUIETLY) if(LAPACK95_FOUND) message(STATUS "A library with LAPACK95 API found.") else() if(LAPACK_FIND_REQUIRED) message(FATAL_ERROR "A required library with LAPACK95 API not found. Please specify library location." ) else() message(STATUS "A library with LAPACK95 API not found. Please specify library location." ) endif() endif() endif() set(LAPACK_FOUND "${LAPACK95_FOUND}") set(LAPACK_LIBRARIES "${LAPACK95_LIBRARIES}") else() if(LAPACK_LIBRARIES) set(LAPACK_FOUND TRUE) else() set(LAPACK_FOUND FALSE) endif() if(NOT LAPACK_FIND_QUIETLY) if(LAPACK_FOUND) message(STATUS "A library with LAPACK API found.") else() if(LAPACK_FIND_REQUIRED) message(FATAL_ERROR "A required library with LAPACK API not found. Please specify library location." ) else() message(STATUS "A library with LAPACK API not found. Please specify library location." ) endif() endif() endif() endif() # On compilers that implicitly link LAPACK (such as ftn, cc, and CC on Cray HPC machines) # we used a placeholder for empty LAPACK_LIBRARIES to get through our logic above. if(LAPACK_LIBRARIES STREQUAL "LAPACK_LIBRARIES-PLACEHOLDER-FOR-EMPTY-LIBRARIES") set(LAPACK_LIBRARIES "") endif() if(NOT TARGET LAPACK::LAPACK) add_library(LAPACK::LAPACK INTERFACE IMPORTED) set(_lapack_libs "${LAPACK_LIBRARIES}") if(_lapack_libs AND TARGET BLAS::BLAS) # remove the ${BLAS_LIBRARIES} from the interface and replace it # with the BLAS::BLAS target list(REMOVE_ITEM _lapack_libs "${BLAS_LIBRARIES}") endif() if(_lapack_libs) set_target_properties(LAPACK::LAPACK PROPERTIES INTERFACE_LINK_LIBRARIES "${_lapack_libs}" ) endif() unset(_lapack_libs) endif() cmake_pop_check_state() set(CMAKE_FIND_LIBRARY_SUFFIXES ${_lapack_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES})