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# 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``
* ``Generic``
``BLA_F95``
if ``ON`` tries to find the BLAS95/LAPACK95 interfaces
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(${CMAKE_CURRENT_LIST_DIR}/CheckFortranFunctionExists.cmake)
else()
include(${CMAKE_CURRENT_LIST_DIR}/CheckFunctionExists.cmake)
endif()
include(${CMAKE_CURRENT_LIST_DIR}/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 ${BLAS_LIBRARIES})
# old and new >= 10.3
list(APPEND LAPACK_SEARCH_LIBS
"mkl_lapack")
endif()
# MKL uses a multitude of partially platform-specific subdirectories:
if(BLA_VENDOR STREQUAL "Intel10_32")
set(LAPACK_mkl_ARCH_NAME "ia32")
else()
set(LAPACK_mkl_ARCH_NAME "intel64")
endif()
if(WIN32)
set(LAPACK_mkl_OS_NAME "win")
elseif(APPLE)
set(LAPACK_mkl_OS_NAME "mac")
else()
set(LAPACK_mkl_OS_NAME "lin")
endif()
if(DEFINED ENV{MKLROOT})
set(LAPACK_mkl_MKLROOT "$ENV{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()
# 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()
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()
cmake_pop_check_state()
set(CMAKE_FIND_LIBRARY_SUFFIXES ${_lapack_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES})