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# - Find 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).
#
# This module sets the following variables:
# LAPACK_FOUND - set to true if a library implementing the LAPACK interface is found
# LAPACK_LIBRARIES - list of libraries (using full path name) for LAPACK
# Note: I do not think it is a good idea to mixup different BLAS/LAPACK versions
# Hence, this script wants to find a Lapack library matching your Blas library
# Do nothing if LAPACK was found before
IF(NOT LAPACK_FOUND)
SET(LAPACK_LIBRARIES)
SET(LAPACK_INFO)
IF(LAPACK_FIND_QUIETLY OR NOT LAPACK_FIND_REQUIRED)
FIND_PACKAGE(BLAS)
ELSE(LAPACK_FIND_QUIETLY OR NOT LAPACK_FIND_REQUIRED)
FIND_PACKAGE(BLAS REQUIRED)
ENDIF(LAPACK_FIND_QUIETLY OR NOT LAPACK_FIND_REQUIRED)
# Old search lapack script
include(CheckFortranFunctionExists)
macro(Check_Lapack_Libraries LIBRARIES _prefix _name _flags _list _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.
set(_libraries_work TRUE)
set(${LIBRARIES})
set(_combined_name)
foreach(_library ${_list})
set(_combined_name ${_combined_name}_${_library})
if(_libraries_work)
if (WIN32)
find_library(${_prefix}_${_library}_LIBRARY
NAMES ${_library} PATHS ENV LIB PATHS ENV PATH)
else (WIN32)
if(APPLE)
find_library(${_prefix}_${_library}_LIBRARY
NAMES ${_library}
PATHS /usr/local/lib /usr/lib /usr/local/lib64 /usr/lib64 /usr/lib/aarch64-linux-gnu
ENV DYLD_LIBRARY_PATH)
else(APPLE)
find_library(${_prefix}_${_library}_LIBRARY
NAMES ${_library}
PATHS /usr/local/lib /usr/lib /usr/local/lib64 /usr/lib64 /usr/lib/aarch64-linux-gnu
ENV LD_LIBRARY_PATH)
endif(APPLE)
endif(WIN32)
mark_as_advanced(${_prefix}_${_library}_LIBRARY)
set(${LIBRARIES} ${${LIBRARIES}} ${${_prefix}_${_library}_LIBRARY})
set(_libraries_work ${${_prefix}_${_library}_LIBRARY})
endif(_libraries_work)
endforeach(_library ${_list})
if(_libraries_work)
# Test this combination of libraries.
set(CMAKE_REQUIRED_LIBRARIES ${_flags} ${${LIBRARIES}} ${_blas})
if (CMAKE_Fortran_COMPILER_WORKS)
check_fortran_function_exists(${_name} ${_prefix}${_combined_name}_WORKS)
else (CMAKE_Fortran_COMPILER_WORKS)
check_function_exists("${_name}_" ${_prefix}${_combined_name}_WORKS)
endif (CMAKE_Fortran_COMPILER_WORKS)
set(CMAKE_REQUIRED_LIBRARIES)
mark_as_advanced(${_prefix}${_combined_name}_WORKS)
set(_libraries_work ${${_prefix}${_combined_name}_WORKS})
endif(_libraries_work)
if(NOT _libraries_work)
set(${LIBRARIES} FALSE)
endif(NOT _libraries_work)
endmacro(Check_Lapack_Libraries)
if(BLAS_FOUND)
# Intel MKL
IF((NOT LAPACK_INFO) AND (BLAS_INFO STREQUAL "mkl"))
IF(MKL_LAPACK_LIBRARIES)
SET(LAPACK_LIBRARIES ${MKL_LAPACK_LIBRARIES} ${MKL_LIBRARIES})
ELSE(MKL_LAPACK_LIBRARIES)
SET(LAPACK_LIBRARIES ${MKL_LIBRARIES})
ENDIF(MKL_LAPACK_LIBRARIES)
SET(LAPACK_INCLUDE_DIR ${MKL_INCLUDE_DIR})
SET(LAPACK_INFO "mkl")
ENDIF()
# Accelerate
IF((NOT LAPACK_INFO) AND (BLAS_INFO STREQUAL "accelerate"))
SET(CMAKE_REQUIRED_LIBRARIES ${BLAS_LIBRARIES})
check_function_exists("cheev_" ACCELERATE_LAPACK_WORKS)
set(CMAKE_REQUIRED_LIBRARIES)
if(ACCELERATE_LAPACK_WORKS)
SET(LAPACK_INFO "accelerate")
else()
message(STATUS "Strangely, this Accelerate library does not support Lapack?!")
endif()
endif()
# vecLib
IF((NOT LAPACK_INFO) AND (BLAS_INFO STREQUAL "veclib"))
SET(CMAKE_REQUIRED_LIBRARIES ${BLAS_LIBRARIES})
check_function_exists("cheev_" VECLIB_LAPACK_WORKS)
set(CMAKE_REQUIRED_LIBRARIES)
if(VECLIB_LAPACK_WORKS)
SET(LAPACK_INFO "veclib")
else()
message(STATUS "Strangely, this vecLib library does not support Lapack?!")
endif()
endif()
# FlexiBLAS
IF((NOT LAPACK_INFO) AND (BLAS_INFO STREQUAL "flexi"))
SET(CMAKE_REQUIRED_LIBRARIES ${BLAS_LIBRARIES})
check_function_exists("cheev_" FLEXIBLAS_LAPACK_WORKS)
set(CMAKE_REQUIRED_LIBRARIES)
if(FLEXIBLAS_LAPACK_WORKS)
SET(LAPACK_INFO "flexi")
else()
message(STATUS "Strangely, this FlexiBLAS library does not support Lapack?!")
endif()
endif()
# OpenBlas
IF((NOT LAPACK_INFO) AND (BLAS_INFO STREQUAL "open"))
SET(CMAKE_REQUIRED_LIBRARIES ${BLAS_LIBRARIES})
check_function_exists("cheev_" OPEN_LAPACK_WORKS)
if(OPEN_LAPACK_WORKS)
check_function_exists("cgesdd_" LAPACK_CGESDD_WORKS)
if(NOT LAPACK_CGESDD_WORKS)
find_library(GFORTRAN_LIBRARY
NAMES libgfortran.a gfortran
PATHS ${CMAKE_C_IMPLICIT_LINK_DIRECTORIES})
list(APPEND CMAKE_REQUIRED_LIBRARIES "${GFORTRAN_LIBRARY}")
unset(LAPACK_CGESDD_WORKS CACHE)
check_function_exists("cgesdd_" LAPACK_CGESDD_WORKS)
if(LAPACK_CGESDD_WORKS)
list(APPEND LAPACK_LIBRARIES "${GFORTRAN_LIBRARY}")
else()
message(WARNING "OpenBlas has been compiled with Lapack support, but cgesdd can not be used")
set(OPEN_LAPACK_WORKS NO)
endif()
endif()
endif()
set(CMAKE_REQUIRED_LIBRARIES)
if(OPEN_LAPACK_WORKS)
SET(LAPACK_INFO "open")
else()
message(STATUS "It seems OpenBlas has not been compiled with Lapack support")
endif()
endif()
# GotoBlas
IF((NOT LAPACK_INFO) AND (BLAS_INFO STREQUAL "goto"))
SET(CMAKE_REQUIRED_LIBRARIES ${BLAS_LIBRARIES})
check_function_exists("cheev_" GOTO_LAPACK_WORKS)
set(CMAKE_REQUIRED_LIBRARIES)
if(GOTO_LAPACK_WORKS)
SET(LAPACK_INFO "goto")
else()
message(STATUS "It seems GotoBlas has not been compiled with Lapack support")
endif()
endif()
# FLAME
IF((NOT LAPACK_INFO) AND (BLAS_INFO STREQUAL "FLAME"))
check_lapack_libraries(
LAPACK_LIBRARIES
LAPACK
cheev
""
"flame"
"${BLAS_LIBRARIES}"
)
if(LAPACK_LIBRARIES)
SET(LAPACK_INFO "FLAME")
endif(LAPACK_LIBRARIES)
endif()
# ACML
IF((NOT LAPACK_INFO) AND (BLAS_INFO STREQUAL "acml"))
SET(CMAKE_REQUIRED_LIBRARIES ${BLAS_LIBRARIES})
check_function_exists("cheev_" ACML_LAPACK_WORKS)
set(CMAKE_REQUIRED_LIBRARIES)
if(ACML_LAPACK_WORKS)
SET(LAPACK_INFO "acml")
else()
message(STATUS "Strangely, this ACML library does not support Lapack?!")
endif()
endif()
# Generic LAPACK library?
IF((NOT LAPACK_INFO) AND (BLAS_INFO STREQUAL "generic"))
check_lapack_libraries(
LAPACK_LIBRARIES
LAPACK
cheev
""
"lapack"
"${BLAS_LIBRARIES}"
)
if(LAPACK_LIBRARIES)
SET(LAPACK_INFO "generic")
endif(LAPACK_LIBRARIES)
endif()
else(BLAS_FOUND)
message(STATUS "LAPACK requires BLAS")
endif(BLAS_FOUND)
if(LAPACK_INFO)
set(LAPACK_FOUND TRUE)
else(LAPACK_INFO)
set(LAPACK_FOUND FALSE)
endif(LAPACK_INFO)
IF (NOT LAPACK_FOUND AND LAPACK_FIND_REQUIRED)
message(FATAL_ERROR "Cannot find a library with LAPACK API. Please specify library location.")
ENDIF (NOT LAPACK_FOUND AND LAPACK_FIND_REQUIRED)
IF(NOT LAPACK_FIND_QUIETLY)
IF(LAPACK_FOUND)
MESSAGE(STATUS "Found a library with LAPACK API (${LAPACK_INFO}).")
ELSE(LAPACK_FOUND)
MESSAGE(STATUS "Cannot find a library with LAPACK API. Not using LAPACK.")
ENDIF(LAPACK_FOUND)
ENDIF(NOT LAPACK_FIND_QUIETLY)
# Do nothing if LAPACK was found before
ENDIF(NOT LAPACK_FOUND)
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