FindBLAS.cmake 39 KB
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###
#
# @copyright (c) 2009-2014 The University of Tennessee and The University
#                          of Tennessee Research Foundation.
#                          All rights reserved.
# @copyright (c) 2012-2014 Inria. All rights reserved.
# @copyright (c) 2012-2014 Bordeaux INP, CNRS (LaBRI UMR 5800), Inria, Univ. Bordeaux. All rights reserved.
#
###
#
# - Find BLAS library
# This module finds an installed fortran library that implements the BLAS
# linear-algebra interface (see http://www.netlib.org/blas/).
# The list of libraries searched for is taken
# from the autoconf macro file, acx_blas.m4 (distributed at
# http://ac-archive.sourceforge.net/ac-archive/acx_blas.html).
#
# This module sets the following variables:
#  BLAS_FOUND - set to true if a library implementing the BLAS interface
#    is found
#  BLAS_LINKER_FLAGS - uncached list of required linker flags (excluding -l
#    and -L).
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#  BLAS_COMPILER_FLAGS - uncached list of required compiler flags (including -I for mkl headers).
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#  BLAS_LIBRARIES - uncached list of libraries (using full path name) to
#    link against to use BLAS
#  BLAS95_LIBRARIES - uncached list of libraries (using full path name)
#    to link against to use BLAS95 interface
#  BLAS95_FOUND - set to true if a library implementing the BLAS f95 interface
#    is found
#  BLA_STATIC  if set on this determines what kind of linkage we do (static)
#  BLA_VENDOR  if set checks only the specified vendor, if not set checks
#     all the possibilities
#  BLA_F95     if set on tries to find the f95 interfaces for BLAS/LAPACK
# The user can give specific paths where to find the libraries adding cmake
# options at configure (ex: cmake path/to/project -DBLAS_DIR=path/to/blas):
#  BLAS_DIR            - Where to find the base directory of blas
#  BLAS_INCDIR         - Where to find the header files
#  BLAS_LIBDIR         - Where to find the library files
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# The module can also look for the following environment variables if paths
# are not given as cmake variable: BLAS_DIR, BLAS_INCDIR, BLAS_LIBDIR
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# For MKL case and if no paths are given as hints, we will try to use the MKLROOT
# environment variable
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##########
### List of vendors (BLA_VENDOR) valid in this module
########## List of vendors (BLA_VENDOR) valid in this module
##  Goto,ATLAS PhiPACK,CXML,DXML,SunPerf,SCSL,SGIMATH,IBMESSL,Intel10_32 (intel mkl v10 32 bit),Intel10_64lp (intel mkl v10 64 bit,lp thread model, lp64 model),
##  Intel10_64lp_seq (intel mkl v10 64 bit,sequential code, lp64 model),
##  Intel( older versions of mkl 32 and 64 bit), ACML,ACML_MP,ACML_GPU,Apple, NAS, Generic
# C/CXX should be enabled to use Intel mkl

#=============================================================================
# Copyright 2007-2009 Kitware, Inc.
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distribute this file outside of CMake, substitute the full
#  License text for the above reference.)


# Set some colors
if(NOT WIN32)
    string(ASCII 27 Esc)
    set(ColourReset "${Esc}[m")
    set(ColourBold  "${Esc}[1m")
    set(Red         "${Esc}[31m")
    set(Green       "${Esc}[32m")
    set(Yellow      "${Esc}[33m")
    set(Blue        "${Esc}[34m")
    set(Magenta     "${Esc}[35m")
    set(Cyan        "${Esc}[36m")
    set(White       "${Esc}[37m")
    set(BoldRed     "${Esc}[1;31m")
    set(BoldGreen   "${Esc}[1;32m")
    set(BoldYellow  "${Esc}[1;33m")
    set(BoldBlue    "${Esc}[1;34m")
    set(BoldMagenta "${Esc}[1;35m")
    set(BoldCyan    "${Esc}[1;36m")
    set(BoldWhite   "${Esc}[1;37m")
endif()

## Some macros to print status when search for headers and libs
# This macro informs why the _lib_to_find file has not been found
macro(Print_Find_Library_Blas_Status _libname _lib_to_find)

    # save _libname upper/lower case
    string(TOUPPER ${_libname} LIBNAME)
    string(TOLOWER ${_libname} libname)

    # print status
    #message(" ")
    if(${LIBNAME}_LIBDIR)
        message("${Yellow}${LIBNAME}_LIBDIR is defined but ${_lib_to_find}"
                "has not been found in ${ARGN}${ColourReset}")
    else()
        if(${LIBNAME}_DIR)
            message("${Yellow}${LIBNAME}_DIR is defined but ${_lib_to_find}"
                    "has not been found in ${ARGN}${ColourReset}")
        else()
            message("${Yellow}${_lib_to_find} not found."
                    "Nor ${LIBNAME}_DIR neither ${LIBNAME}_LIBDIR"
                    "are defined so that we look for ${_lib_to_find} in"
                    "system paths (Linux: LD_LIBRARY_PATH, Windows: LIB,"
                    "Mac: DYLD_LIBRARY_PATH,"
                    "CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES,"
                    "CMAKE_C_IMPLICIT_LINK_DIRECTORIES)${ColourReset}")
            if(_lib_env)
                message("${Yellow}${_lib_to_find} has not been found in"
                        "${_lib_env}${ColourReset}")
            endif()
        endif()
    endif()
    message("${BoldYellow}Please indicate where to find ${_lib_to_find}. You have three options:\n"
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            "- Option 1: Provide the Installation directory of BLAS library with cmake option: -D${LIBNAME}_DIR=your/path/to/${libname}/\n"
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            "- Option 2: Provide the directory where to find the library with cmake option: -D${LIBNAME}_LIBDIR=your/path/to/${libname}/lib/\n"
            "- Option 3: Update your environment variable (Linux: LD_LIBRARY_PATH, Windows: LIB, Mac: DYLD_LIBRARY_PATH)\n"
            "- Option 4: If your library provides a PkgConfig file, make sure pkg-config finds your library${ColourReset}")

endmacro()

# This macro informs why the _lib_to_find file has not been found
macro(Print_Find_Library_Blas_CheckFunc_Status _name)

    # save _libname upper/lower case
    string(TOUPPER ${_name} FUNCNAME)
    string(TOLOWER ${_name} funcname)

    # print status
    #message(" ")
    message("${Red}Libs have been found but check of symbol ${_name} failed "
            "with following libraries ${ARGN}${ColourReset}")
    message("${BoldRed}Please open your error file CMakeFiles/CMakeError.log"
            "to figure out why it fails${ColourReset}")
    #message(" ")

endmacro()

if (NOT BLAS_FOUND)
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    set(BLAS_DIR "" CACHE PATH "Installation directory of BLAS library")
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    if (NOT BLAS_FIND_QUIETLY)
        message(STATUS "A cache variable, namely BLAS_DIR, has been set to specify the install directory of BLAS")
    endif()
endif()

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option(BLAS_VERBOSE "Print some additional information during BLAS libraries detection" OFF)
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include(CheckFunctionExists)
include(CheckFortranFunctionExists)

set(_blas_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES})

# Check the language being used
get_property( _LANGUAGES_ GLOBAL PROPERTY ENABLED_LANGUAGES )
if( _LANGUAGES_ MATCHES Fortran )
    set( _CHECK_FORTRAN TRUE )
elseif( (_LANGUAGES_ MATCHES C) OR (_LANGUAGES_ MATCHES CXX) )
    set( _CHECK_FORTRAN FALSE )
else()
    if(BLAS_FIND_REQUIRED)
        message(FATAL_ERROR "FindBLAS requires Fortran, C, or C++ to be enabled.")
    else()
        message(STATUS "Looking for BLAS... - NOT found (Unsupported languages)")
        return()
    endif()
endif()

macro(Check_Fortran_Libraries LIBRARIES _prefix _name _flags _list _thread)
# 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(_libdir ${ARGN})

    set(_libraries_work TRUE)
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    set(${LIBRARIES})
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    set(_combined_name)
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    set(ENV_MKLROOT "$ENV{MKLROOT}")
    set(ENV_BLAS_DIR "$ENV{BLAS_DIR}")
    set(ENV_BLAS_LIBDIR "$ENV{BLAS_LIBDIR}")
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    if (NOT _libdir)
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        if (BLAS_LIBDIR)
            list(APPEND _libdir "${BLAS_LIBDIR}")
        elseif (BLAS_DIR)
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            list(APPEND _libdir "${BLAS_DIR}")
            list(APPEND _libdir "${BLAS_DIR}/lib")
            if("${CMAKE_SIZEOF_VOID_P}" EQUAL "8")
                list(APPEND _libdir "${BLAS_DIR}/lib64")
                list(APPEND _libdir "${BLAS_DIR}/lib/intel64")
            else()
                list(APPEND _libdir "${BLAS_DIR}/lib32")
                list(APPEND _libdir "${BLAS_DIR}/lib/ia32")
            endif()
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        elseif(ENV_BLAS_LIBDIR)
            list(APPEND _libdir "${ENV_BLAS_LIBDIR}")
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        elseif(ENV_BLAS_DIR)
            list(APPEND _libdir "${ENV_BLAS_DIR}")
            list(APPEND _libdir "${ENV_BLAS_DIR}/lib")
            if("${CMAKE_SIZEOF_VOID_P}" EQUAL "8")
                list(APPEND _libdir "${ENV_BLAS_DIR}/lib64")
                list(APPEND _libdir "${ENV_BLAS_DIR}/lib/intel64")
            else()
                list(APPEND _libdir "${ENV_BLAS_DIR}/lib32")
                list(APPEND _libdir "${ENV_BLAS_DIR}/lib/ia32")
            endif()
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        else()
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            if (ENV_MKLROOT)
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                list(APPEND _libdir "${ENV_MKLROOT}/lib")
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                if("${CMAKE_SIZEOF_VOID_P}" EQUAL "8")
                    list(APPEND _libdir "${ENV_MKLROOT}/lib64")
                    list(APPEND _libdir "${ENV_MKLROOT}/lib/intel64")
                else()
                    list(APPEND _libdir "${ENV_MKLROOT}/lib32")
                    list(APPEND _libdir "${ENV_MKLROOT}/lib/ia32")
                endif()
            endif()
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            if (WIN32)
                string(REPLACE ":" ";" _libdir2 "$ENV{LIB}")
            elseif (APPLE)
                string(REPLACE ":" ";" _libdir2 "$ENV{DYLD_LIBRARY_PATH}")
            else ()
                string(REPLACE ":" ";" _libdir2 "$ENV{LD_LIBRARY_PATH}")
            endif ()
            list(APPEND _libdir "${_libdir2}")
            list(APPEND _libdir "${CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES}")
            list(APPEND _libdir "${CMAKE_C_IMPLICIT_LINK_DIRECTORIES}")
        endif()
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    endif ()

    if (BLAS_VERBOSE)
        message("${Cyan}Try to find BLAS libraries: ${_list}")
    endif ()

    foreach(_library ${_list})
        set(_combined_name ${_combined_name}_${_library})

        if(_libraries_work)
            if (BLA_STATIC)
                if (WIN32)
                    set(CMAKE_FIND_LIBRARY_SUFFIXES .lib ${CMAKE_FIND_LIBRARY_SUFFIXES})
                endif ()
                if (APPLE)
                    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 ${CMAKE_FIND_LIBRARY_SUFFIXES} .so.3gf)
                endif ()
            endif ()
            find_library(${_prefix}_${_library}_LIBRARY
                NAMES ${_library}
                HINTS ${_libdir}
              )
            mark_as_advanced(${_prefix}_${_library}_LIBRARY)
            # Print status if not found
            # -------------------------
            if (NOT ${_prefix}_${_library}_LIBRARY AND NOT BLAS_FIND_QUIETLY AND BLAS_VERBOSE)
                Print_Find_Library_Blas_Status(blas ${_library} ${_libdir})
            endif ()
            set(${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.
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        set(CMAKE_REQUIRED_LIBRARIES "${_flags};${${LIBRARIES}};${_thread}")
        set(CMAKE_REQUIRED_FLAGS "${BLAS_COMPILER_FLAGS}")
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        if (BLAS_VERBOSE)
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            message("${Cyan}BLAS libs found for BLA_VENDOR ${BLA_VENDOR}."
                    "Try to compile symbol ${_name} with following libraries:"
                    "${CMAKE_REQUIRED_LIBRARIES}")
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        endif ()
        if(NOT BLAS_FOUND)
            unset(${_prefix}${_combined_name}_WORKS CACHE)
        endif()
        if (_CHECK_FORTRAN)
            check_fortran_function_exists("${_name}" ${_prefix}${_combined_name}_WORKS)
        else()
            check_function_exists("${_name}_" ${_prefix}${_combined_name}_WORKS)
        endif()
        mark_as_advanced(${_prefix}${_combined_name}_WORKS)
        set(_libraries_work ${${_prefix}${_combined_name}_WORKS})
        # Print status if not found
        # -------------------------
        if (NOT _libraries_work AND NOT BLAS_FIND_QUIETLY AND BLAS_VERBOSE)
            Print_Find_Library_Blas_CheckFunc_Status(${_name} ${CMAKE_REQUIRED_LIBRARIES})
        endif ()
        set(CMAKE_REQUIRED_LIBRARIES)
    endif()

    if(_libraries_work)
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      set(${LIBRARIES} ${${LIBRARIES}} ${_thread})
    else(_libraries_work)
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        set(${LIBRARIES} FALSE)
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    endif(_libraries_work)
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# message("DEBUG: ${LIBRARIES} = ${${LIBRARIES}}")

endmacro(Check_Fortran_Libraries)


set(BLAS_LINKER_FLAGS)
set(BLAS_LIBRARIES)
set(BLAS95_LIBRARIES)
if ($ENV{BLA_VENDOR} MATCHES ".+")
    set(BLA_VENDOR $ENV{BLA_VENDOR})
else ()
    if(NOT BLA_VENDOR)
        set(BLA_VENDOR "All")
    endif()
endif ()

#BLAS in intel mkl 10 library? (em64t 64bit)
if (BLA_VENDOR MATCHES "Intel*" OR BLA_VENDOR STREQUAL "All")

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    # Looking for include
    # -------------------

    # Add system include paths to search include
    # ------------------------------------------
    unset(_inc_env)
    set(ENV_MKLROOT "$ENV{MKLROOT}")
    set(ENV_BLAS_DIR "$ENV{BLAS_DIR}")
    set(ENV_BLAS_INCDIR "$ENV{BLAS_INCDIR}")
    if(ENV_BLAS_INCDIR)
        list(APPEND _inc_env "${ENV_BLAS_INCDIR}")
    elseif(ENV_BLAS_DIR)
        list(APPEND _inc_env "${ENV_BLAS_DIR}")
        list(APPEND _inc_env "${ENV_BLAS_DIR}/include")
    else()
        if (ENV_MKLROOT)
            list(APPEND _inc_env "${ENV_MKLROOT}/include")
        endif()
        # system variables
        if(WIN32)
            string(REPLACE ":" ";" _path_env "$ENV{INCLUDE}")
            list(APPEND _inc_env "${_path_env}")
        else()
            string(REPLACE ":" ";" _path_env "$ENV{INCLUDE}")
            list(APPEND _inc_env "${_path_env}")
            string(REPLACE ":" ";" _path_env "$ENV{C_INCLUDE_PATH}")
            list(APPEND _inc_env "${_path_env}")
            string(REPLACE ":" ";" _path_env "$ENV{CPATH}")
            list(APPEND _inc_env "${_path_env}")
            string(REPLACE ":" ";" _path_env "$ENV{INCLUDE_PATH}")
            list(APPEND _inc_env "${_path_env}")
        endif()
    endif()
    list(APPEND _inc_env "${CMAKE_PLATFORM_IMPLICIT_INCLUDE_DIRECTORIES}")
    list(APPEND _inc_env "${CMAKE_C_IMPLICIT_INCLUDE_DIRECTORIES}")
    list(REMOVE_DUPLICATES _inc_env)

    # set paths where to look for
    set(PATH_TO_LOOK_FOR "${_inc_env}")

    # Try to find the fftw header in the given paths
    # -------------------------------------------------
    # call cmake macro to find the header path
    if(BLAS_INCDIR)
        set(BLAS_mkl.h_DIRS "BLAS_mkl.h_DIRS-NOTFOUND")
        find_path(BLAS_mkl.h_DIRS
          NAMES mkl.h
          HINTS ${BLAS_INCDIR})
    else()
        if(BLAS_DIR)
            set(BLAS_mkl.h_DIRS "BLAS_mkl.h_DIRS-NOTFOUND")
            find_path(BLAS_mkl.h_DIRS
              NAMES mkl.h
              HINTS ${BLAS_DIR}
              PATH_SUFFIXES "include")
        else()
            set(BLAS_mkl.h_DIRS "BLAS_mkl.h_DIRS-NOTFOUND")
            find_path(BLAS_mkl.h_DIRS
                      NAMES mkl.h
                      HINTS ${PATH_TO_LOOK_FOR})
        endif()
    endif()
    mark_as_advanced(BLAS_mkl.h_DIRS)

    # If found, add path to cmake variable
    # ------------------------------------
    if (BLAS_mkl.h_DIRS)
        set(BLAS_INCLUDE_DIRS "${BLAS_mkl.h_DIRS}")
    else ()
        set(BLAS_INCLUDE_DIRS "BLAS_INCLUDE_DIRS-NOTFOUND")
        if(NOT BLAS_FIND_QUIETLY)
            message(STATUS "Looking for BLAS -- mkl.h not found")
        endif()
    endif()

    # libiomp5
    # --------
    if (WIN32)
        string(REPLACE ":" ";" _libdir "$ENV{LIB}")
    elseif (APPLE)
        string(REPLACE ":" ";" _libdir "$ENV{DYLD_LIBRARY_PATH}")
    else ()
        string(REPLACE ":" ";" _libdir "$ENV{LD_LIBRARY_PATH}")
    endif ()
    list(APPEND _libdir "${CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES}")
    list(APPEND _libdir "${CMAKE_C_IMPLICIT_LINK_DIRECTORIES}")
    set(OMP_iomp5_LIBRARY "OMP_iomp5_LIBRARY-NOTFOUND")
    find_library(OMP_iomp5_LIBRARY
        NAMES iomp5
        HINTS ${_libdir}
      )
    mark_as_advanced(OMP_iomp5_LIBRARY)
    set(OMP_LIB "")
    if (OMP_iomp5_LIBRARY)
        set(OMP_LIB "${OMP_iomp5_LIBRARY}")
    endif()

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    if (UNIX AND NOT WIN32)
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        set(LM "-lm")
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        set(BLAS_COMPILER_FLAGS "")
        if (CMAKE_C_COMPILER_ID STREQUAL "Intel" AND NOT BLA_VENDOR STREQUAL "Intel10_64lp_seq")
            list(APPEND BLAS_COMPILER_FLAGS "-openmp")
        endif()
        if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
            if (BLA_VENDOR STREQUAL "Intel10_32")
                #list(APPEND BLAS_COMPILER_FLAGS "-m32")
            else()
                #list(APPEND BLAS_COMPILER_FLAGS "-m64")
            endif()
            if (NOT BLA_VENDOR STREQUAL "Intel10_64lp_seq")
                list(APPEND OMP_LIB "-ldl")
            endif()
        endif()

        set(additional_flags "")
        if (CMAKE_C_COMPILER_ID STREQUAL "GNU" AND CMAKE_SYSTEM_NAME STREQUAL "Linux")
            set(additional_flags "-Wl,--no-as-needed")
        endif()
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    endif ()
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    if (_LANGUAGES_ MATCHES C OR _LANGUAGES_ MATCHES CXX)
        if(BLAS_FIND_QUIETLY OR NOT BLAS_FIND_REQUIRED)
            find_package(Threads)
        else()
            find_package(Threads REQUIRED)
        endif()

        set(BLAS_SEARCH_LIBS "")

        if(BLA_F95)

            set(BLAS_mkl_SEARCH_SYMBOL SGEMM)
            set(_LIBRARIES BLAS95_LIBRARIES)
            if (WIN32)
                if (BLA_STATIC)
                    set(BLAS_mkl_DLL_SUFFIX "")
                else()
                    set(BLAS_mkl_DLL_SUFFIX "_dll")
                endif()

                # Find the main file (32-bit or 64-bit)
                set(BLAS_SEARCH_LIBS_WIN_MAIN "")
                if (BLA_VENDOR STREQUAL "Intel10_32" OR BLA_VENDOR STREQUAL "All")
                    list(APPEND BLAS_SEARCH_LIBS_WIN_MAIN
                    "mkl_blas95${BLAS_mkl_DLL_SUFFIX} mkl_intel_c${BLAS_mkl_DLL_SUFFIX}")
                endif()
                if (BLA_VENDOR STREQUAL "Intel10_64lp*" OR BLA_VENDOR STREQUAL "All")
                    list(APPEND BLAS_SEARCH_LIBS_WIN_MAIN
                    "mkl_blas95_lp64${BLAS_mkl_DLL_SUFFIX} mkl_intel_lp64${BLAS_mkl_DLL_SUFFIX}")
                endif ()

                # Add threading/sequential libs
                set(BLAS_SEARCH_LIBS_WIN_THREAD "")
                if (BLA_VENDOR STREQUAL "*_seq" OR BLA_VENDOR STREQUAL "All")
                    list(APPEND BLAS_SEARCH_LIBS_WIN_THREAD
                    "mkl_sequential${BLAS_mkl_DLL_SUFFIX}")
                endif()
                if (NOT BLA_VENDOR STREQUAL "*_seq" OR BLA_VENDOR STREQUAL "All")
                    # old version
                    list(APPEND BLAS_SEARCH_LIBS_WIN_THREAD
                    "libguide40 mkl_intel_thread${BLAS_mkl_DLL_SUFFIX}")
                    # mkl >= 10.3
                    list(APPEND BLAS_SEARCH_LIBS_WIN_THREAD
                    "libiomp5md mkl_intel_thread${BLAS_mkl_DLL_SUFFIX}")
                endif()

                # Cartesian product of the above
                foreach (MAIN ${BLAS_SEARCH_LIBS_WIN_MAIN})
                    foreach (THREAD ${BLAS_SEARCH_LIBS_WIN_THREAD})
                        list(APPEND BLAS_SEARCH_LIBS
                        "${MAIN} ${THREAD} mkl_core${BLAS_mkl_DLL_SUFFIX}")
                    endforeach()
                endforeach()
            else (WIN32)
                if (BLA_VENDOR STREQUAL "Intel10_32" OR BLA_VENDOR STREQUAL "All")
                    list(APPEND BLAS_SEARCH_LIBS
                    "mkl_blas95 mkl_intel mkl_intel_thread mkl_core guide")
                endif ()
                if (BLA_VENDOR STREQUAL "Intel10_64lp" OR BLA_VENDOR STREQUAL "All")
                    # old version
                    list(APPEND BLAS_SEARCH_LIBS
                    "mkl_blas95 mkl_intel_lp64 mkl_intel_thread mkl_core guide")
                    # mkl >= 10.3
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                    list(APPEND BLAS_SEARCH_LIBS
                    "mkl_blas95_lp64 mkl_intel_lp64 mkl_intel_thread mkl_core")
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                endif ()
                if (BLA_VENDOR STREQUAL "Intel10_64lp_seq" OR BLA_VENDOR STREQUAL "All")
                    list(APPEND BLAS_SEARCH_LIBS
                    "mkl_intel_lp64 mkl_sequential mkl_core")
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                    if (BLA_VENDOR STREQUAL "Intel10_64lp_seq")
                        set(OMP_LIB "")
                    endif()
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                endif ()
            endif (WIN32)

        else (BLA_F95)

            set(BLAS_mkl_SEARCH_SYMBOL sgemm)
            set(_LIBRARIES BLAS_LIBRARIES)
            if (WIN32)
                if (BLA_STATIC)
                    set(BLAS_mkl_DLL_SUFFIX "")
                else()
                    set(BLAS_mkl_DLL_SUFFIX "_dll")
                endif()

                # Find the main file (32-bit or 64-bit)
                set(BLAS_SEARCH_LIBS_WIN_MAIN "")
                if (BLA_VENDOR STREQUAL "Intel10_32" OR BLA_VENDOR STREQUAL "All")
                    list(APPEND BLAS_SEARCH_LIBS_WIN_MAIN
                    "mkl_intel_c${BLAS_mkl_DLL_SUFFIX}")
                endif()
                if (BLA_VENDOR STREQUAL "Intel10_64lp*" OR BLA_VENDOR STREQUAL "All")
                    list(APPEND BLAS_SEARCH_LIBS_WIN_MAIN
                    "mkl_intel_lp64${BLAS_mkl_DLL_SUFFIX}")
                endif ()

                # Add threading/sequential libs
                set(BLAS_SEARCH_LIBS_WIN_THREAD "")
                if (NOT BLA_VENDOR STREQUAL "*_seq" OR BLA_VENDOR STREQUAL "All")
                    # old version
                    list(APPEND BLAS_SEARCH_LIBS_WIN_THREAD
                    "libguide40 mkl_intel_thread${BLAS_mkl_DLL_SUFFIX}")
                    # mkl >= 10.3
                    list(APPEND BLAS_SEARCH_LIBS_WIN_THREAD
                    "libiomp5md mkl_intel_thread${BLAS_mkl_DLL_SUFFIX}")
                endif()
                if (BLA_VENDOR STREQUAL "*_seq" OR BLA_VENDOR STREQUAL "All")
                    list(APPEND BLAS_SEARCH_LIBS_WIN_THREAD
                    "mkl_sequential${BLAS_mkl_DLL_SUFFIX}")
                endif()

                # Cartesian product of the above
                foreach (MAIN ${BLAS_SEARCH_LIBS_WIN_MAIN})
                    foreach (THREAD ${BLAS_SEARCH_LIBS_WIN_THREAD})
                        list(APPEND BLAS_SEARCH_LIBS
                        "${MAIN} ${THREAD} mkl_core${BLAS_mkl_DLL_SUFFIX}")
                    endforeach()
                endforeach()
            else (WIN32)
                if (BLA_VENDOR STREQUAL "Intel10_32" OR BLA_VENDOR STREQUAL "All")
                    list(APPEND BLAS_SEARCH_LIBS
                    "mkl_intel mkl_intel_thread mkl_core guide")
                endif ()
                if (BLA_VENDOR STREQUAL "Intel10_64lp" OR BLA_VENDOR STREQUAL "All")
                    # old version
                    list(APPEND BLAS_SEARCH_LIBS
                    "mkl_intel_lp64 mkl_intel_thread mkl_core guide")
                    # mkl >= 10.3
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                    list(APPEND BLAS_SEARCH_LIBS
                    "mkl_intel_lp64 mkl_intel_thread mkl_core")
581 582 583 584
                endif ()
                if (BLA_VENDOR STREQUAL "Intel10_64lp_seq" OR BLA_VENDOR STREQUAL "All")
                    list(APPEND BLAS_SEARCH_LIBS
                    "mkl_intel_lp64 mkl_sequential mkl_core")
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                    if (BLA_VENDOR STREQUAL "Intel10_64lp_seq")
                        set(OMP_LIB "")
                    endif()
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                endif ()
                #older vesions of intel mkl libs
                if (BLA_VENDOR STREQUAL "Intel" OR BLA_VENDOR STREQUAL "All")
                    list(APPEND BLAS_SEARCH_LIBS
                    "mkl")
                    list(APPEND BLAS_SEARCH_LIBS
                    "mkl_ia32")
                    list(APPEND BLAS_SEARCH_LIBS
                    "mkl_em64t")
                endif ()
            endif (WIN32)

        endif (BLA_F95)

        foreach (IT ${BLAS_SEARCH_LIBS})
            string(REPLACE " " ";" SEARCH_LIBS ${IT})
            if (${_LIBRARIES})
            else ()
                check_fortran_libraries(
                ${_LIBRARIES}
                BLAS
                ${BLAS_mkl_SEARCH_SYMBOL}
                "${additional_flags}"
                "${SEARCH_LIBS}"
612
                "${OMP_LIB};${CMAKE_THREAD_LIBS_INIT};${LM}"
613
                )
614 615 616
                if(_LIBRARIES)
                    set(BLAS_LINKER_FLAGS "${additional_flags}")
                endif()
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            endif()
        endforeach ()

    endif (_LANGUAGES_ MATCHES C OR _LANGUAGES_ MATCHES CXX)

endif (BLA_VENDOR MATCHES "Intel*" OR BLA_VENDOR STREQUAL "All")


if (BLA_VENDOR STREQUAL "Goto" OR BLA_VENDOR STREQUAL "All")

    if(NOT BLAS_LIBRARIES)
        # gotoblas (http://www.tacc.utexas.edu/tacc-projects/gotoblas2)
        check_fortran_libraries(
        BLAS_LIBRARIES
        BLAS
        sgemm
        ""
        "goto2"
        ""
        )
    endif()

endif (BLA_VENDOR STREQUAL "Goto" OR BLA_VENDOR STREQUAL "All")


if (BLA_VENDOR STREQUAL "Open" OR BLA_VENDOR STREQUAL "All")

    if(NOT BLAS_LIBRARIES)
        # openblas (http://www.openblas.net/)
        check_fortran_libraries(
        BLAS_LIBRARIES
        BLAS
        sgemm
        ""
        "openblas"
        ""
        )
    endif()

endif (BLA_VENDOR STREQUAL "Open" OR BLA_VENDOR STREQUAL "All")


if (BLA_VENDOR STREQUAL "ATLAS" OR BLA_VENDOR STREQUAL "All")

    if(NOT BLAS_LIBRARIES)
        # BLAS in ATLAS library? (http://math-atlas.sourceforge.net/)
        check_fortran_libraries(
        BLAS_LIBRARIES
        BLAS
        dgemm
        ""
        "f77blas;atlas"
        ""
        )
    endif()

endif (BLA_VENDOR STREQUAL "ATLAS" OR BLA_VENDOR STREQUAL "All")


# BLAS in PhiPACK libraries? (requires generic BLAS lib, too)
if (BLA_VENDOR STREQUAL "PhiPACK" OR BLA_VENDOR STREQUAL "All")

    if(NOT BLAS_LIBRARIES)
        check_fortran_libraries(
        BLAS_LIBRARIES
        BLAS
        sgemm
        ""
        "sgemm;dgemm;blas"
        ""
        )
    endif()

endif (BLA_VENDOR STREQUAL "PhiPACK" OR BLA_VENDOR STREQUAL "All")


# BLAS in Alpha CXML library?
if (BLA_VENDOR STREQUAL "CXML" OR BLA_VENDOR STREQUAL "All")

    if(NOT BLAS_LIBRARIES)
        check_fortran_libraries(
        BLAS_LIBRARIES
        BLAS
        sgemm
        ""
        "cxml"
        ""
        )
    endif()

endif (BLA_VENDOR STREQUAL "CXML" OR BLA_VENDOR STREQUAL "All")


# BLAS in Alpha DXML library? (now called CXML, see above)
if (BLA_VENDOR STREQUAL "DXML" OR BLA_VENDOR STREQUAL "All")

    if(NOT BLAS_LIBRARIES)
        check_fortran_libraries(
        BLAS_LIBRARIES
        BLAS
        sgemm
        ""
        "dxml"
        ""
        )
    endif()

endif (BLA_VENDOR STREQUAL "DXML" OR BLA_VENDOR STREQUAL "All")


# BLAS in Sun Performance library?
if (BLA_VENDOR STREQUAL "SunPerf" OR BLA_VENDOR STREQUAL "All")

    if(NOT BLAS_LIBRARIES)
        check_fortran_libraries(
        BLAS_LIBRARIES
        BLAS
        sgemm
        "-xlic_lib=sunperf"
        "sunperf;sunmath"
        ""
        )
        if(BLAS_LIBRARIES)
            set(BLAS_LINKER_FLAGS "-xlic_lib=sunperf")
        endif()
    endif()

endif ()


# BLAS in SCSL library?  (SGI/Cray Scientific Library)
if (BLA_VENDOR STREQUAL "SCSL" OR BLA_VENDOR STREQUAL "All")

    if(NOT BLAS_LIBRARIES)
        check_fortran_libraries(
        BLAS_LIBRARIES
        BLAS
        sgemm
        ""
        "scsl"
        ""
        )
    endif()

endif ()


# BLAS in SGIMATH library?
if (BLA_VENDOR STREQUAL "SGIMATH" OR BLA_VENDOR STREQUAL "All")

    if(NOT BLAS_LIBRARIES)
        check_fortran_libraries(
        BLAS_LIBRARIES
        BLAS
        sgemm
        ""
        "complib.sgimath"
        ""
        )
    endif()

endif ()


# BLAS in IBM ESSL library? (requires generic BLAS lib, too)
if (BLA_VENDOR STREQUAL "IBMESSL" OR BLA_VENDOR STREQUAL "All")

    if(NOT BLAS_LIBRARIES)
        check_fortran_libraries(
        BLAS_LIBRARIES
        BLAS
        sgemm
        ""
        "essl;blas"
        ""
        )
    endif()

endif ()


#BLAS in acml library?
if (BLA_VENDOR MATCHES "ACML.*" OR BLA_VENDOR STREQUAL "All")

    if( ((BLA_VENDOR STREQUAL "ACML") AND (NOT BLAS_ACML_LIB_DIRS)) OR
        ((BLA_VENDOR STREQUAL "ACML_MP") AND (NOT BLAS_ACML_MP_LIB_DIRS)) OR
        ((BLA_VENDOR STREQUAL "ACML_GPU") AND (NOT BLAS_ACML_GPU_LIB_DIRS)))

        # try to find acml in "standard" paths
        if( WIN32 )
            file( GLOB _ACML_ROOT "C:/AMD/acml*/ACML-EULA.txt" )
        else()
            file( GLOB _ACML_ROOT "/opt/acml*/ACML-EULA.txt" )
        endif()
        if( WIN32 )
            file( GLOB _ACML_GPU_ROOT "C:/AMD/acml*/GPGPUexamples" )
        else()
            file( GLOB _ACML_GPU_ROOT "/opt/acml*/GPGPUexamples" )
        endif()
        list(GET _ACML_ROOT 0 _ACML_ROOT)
        list(GET _ACML_GPU_ROOT 0 _ACML_GPU_ROOT)

        if( _ACML_ROOT )

            get_filename_component( _ACML_ROOT ${_ACML_ROOT} PATH )
            if( SIZEOF_INTEGER EQUAL 8 )
                set( _ACML_PATH_SUFFIX "_int64" )
            else()
                set( _ACML_PATH_SUFFIX "" )
            endif()
            if( CMAKE_Fortran_COMPILER_ID STREQUAL "Intel" )
                set( _ACML_COMPILER32 "ifort32" )
                set( _ACML_COMPILER64 "ifort64" )
            elseif( CMAKE_Fortran_COMPILER_ID STREQUAL "SunPro" )
                set( _ACML_COMPILER32 "sun32" )
                set( _ACML_COMPILER64 "sun64" )
            elseif( CMAKE_Fortran_COMPILER_ID STREQUAL "PGI" )
                set( _ACML_COMPILER32 "pgi32" )
                if( WIN32 )
                    set( _ACML_COMPILER64 "win64" )
                else()
                    set( _ACML_COMPILER64 "pgi64" )
                endif()
            elseif( CMAKE_Fortran_COMPILER_ID STREQUAL "Open64" )
                # 32 bit builds not supported on Open64 but for code simplicity
                # We'll just use the same directory twice
                set( _ACML_COMPILER32 "open64_64" )
                set( _ACML_COMPILER64 "open64_64" )
            elseif( CMAKE_Fortran_COMPILER_ID STREQUAL "NAG" )
                set( _ACML_COMPILER32 "nag32" )
                set( _ACML_COMPILER64 "nag64" )
            else()
                set( _ACML_COMPILER32 "gfortran32" )
                set( _ACML_COMPILER64 "gfortran64" )
            endif()

            if( BLA_VENDOR STREQUAL "ACML_MP" )
                set(_ACML_MP_LIB_DIRS
                    "${_ACML_ROOT}/${_ACML_COMPILER32}_mp${_ACML_PATH_SUFFIX}/lib"
                    "${_ACML_ROOT}/${_ACML_COMPILER64}_mp${_ACML_PATH_SUFFIX}/lib" )
            else()
                set(_ACML_LIB_DIRS
                    "${_ACML_ROOT}/${_ACML_COMPILER32}${_ACML_PATH_SUFFIX}/lib"
                    "${_ACML_ROOT}/${_ACML_COMPILER64}${_ACML_PATH_SUFFIX}/lib" )
            endif()

        endif(_ACML_ROOT)

    elseif(BLAS_${BLA_VENDOR}_LIB_DIRS)

        set(_${BLA_VENDOR}_LIB_DIRS ${BLAS_${BLA_VENDOR}_LIB_DIRS})

    endif()

    if( BLA_VENDOR STREQUAL "ACML_MP" )
        foreach( BLAS_ACML_MP_LIB_DIRS ${_ACML_MP_LIB_DIRS})
            check_fortran_libraries (
            BLAS_LIBRARIES
            BLAS
            sgemm
            "" "acml_mp;acml_mv" "" ${BLAS_ACML_MP_LIB_DIRS}
            )
            if( BLAS_LIBRARIES )
                break()
            endif()
        endforeach()
    elseif( BLA_VENDOR STREQUAL "ACML_GPU" )
        foreach( BLAS_ACML_GPU_LIB_DIRS ${_ACML_GPU_LIB_DIRS})
            check_fortran_libraries (
            BLAS_LIBRARIES
            BLAS
            sgemm
            "" "acml;acml_mv;CALBLAS" "" ${BLAS_ACML_GPU_LIB_DIRS}
            )
            if( BLAS_LIBRARIES )
                break()
            endif()
        endforeach()
    else()
        foreach( BLAS_ACML_LIB_DIRS ${_ACML_LIB_DIRS} )
            check_fortran_libraries (
            BLAS_LIBRARIES
            BLAS
            sgemm
            "" "acml;acml_mv" "" ${BLAS_ACML_LIB_DIRS}
            )
            if( BLAS_LIBRARIES )
                break()
            endif()
        endforeach()
    endif()

    # Either acml or acml_mp should be in LD_LIBRARY_PATH but not both
    if(NOT BLAS_LIBRARIES)
        check_fortran_libraries(
        BLAS_LIBRARIES
        BLAS
        sgemm
        ""
        "acml;acml_mv"
        ""
        )
    endif()

    if(NOT BLAS_LIBRARIES)
        check_fortran_libraries(
        BLAS_LIBRARIES
        BLAS
        sgemm
        ""
        "acml_mp;acml_mv"
        ""
        )
    endif()

    if(NOT BLAS_LIBRARIES)
        check_fortran_libraries(
        BLAS_LIBRARIES
        BLAS
        sgemm
        ""
        "acml;acml_mv;CALBLAS"
        ""
        )
    endif()

endif (BLA_VENDOR MATCHES "ACML.*" OR BLA_VENDOR STREQUAL "All") # ACML


# Apple BLAS library?
if (BLA_VENDOR STREQUAL "Apple" OR BLA_VENDOR STREQUAL "All")

    if(NOT BLAS_LIBRARIES)
        check_fortran_libraries(
        BLAS_LIBRARIES
        BLAS
        dgemm
        ""
        "Accelerate"
        ""
        )
    endif()

endif (BLA_VENDOR STREQUAL "Apple" OR BLA_VENDOR STREQUAL "All")


if (BLA_VENDOR STREQUAL "NAS" OR BLA_VENDOR STREQUAL "All")

    if ( NOT BLAS_LIBRARIES )
        check_fortran_libraries(
        BLAS_LIBRARIES
        BLAS
        dgemm
        ""
        "vecLib"
        ""
        )
    endif ()

endif (BLA_VENDOR STREQUAL "NAS" OR BLA_VENDOR STREQUAL "All")


# Generic BLAS library?
if (BLA_VENDOR STREQUAL "Generic" OR BLA_VENDOR STREQUAL "All")

    if(NOT BLAS_LIBRARIES)
        check_fortran_libraries(
        BLAS_LIBRARIES
        BLAS
        sgemm
        ""
        "blas"
        ""
        )
    endif()

endif (BLA_VENDOR STREQUAL "Generic" OR BLA_VENDOR STREQUAL "All")


if(BLA_F95)

    if(BLAS95_LIBRARIES)
       set(BLAS95_FOUND TRUE)
    else()
       set(BLAS95_FOUND FALSE)
    endif()

    if(NOT BLAS_FIND_QUIETLY)
        if(BLAS95_FOUND)
            message(STATUS "A library with BLAS95 API found.")
            message(STATUS "BLAS_LIBRARIES ${BLAS_LIBRARIES}")
        else(BLAS95_FOUND)
            message(WARNING "BLA_VENDOR has been set to ${BLA_VENDOR} but blas 95 libraries could not be found or check of symbols failed."
                        "\nPlease indicate where to find blas libraries. You have three options:\n"
1011
                        "- Option 1: Provide the installation directory of BLAS library with cmake option: -DBLAS_DIR=your/path/to/blas\n"
1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030
                        "- Option 2: Provide the directory where to find BLAS libraries with cmake option: -DBLAS_LIBDIR=your/path/to/blas/libs\n"
                        "- Option 3: Update your environment variable (Linux: LD_LIBRARY_PATH, Windows: LIB, Mac: DYLD_LIBRARY_PATH)\n"
                        "\nTo follow libraries detection more precisely you can activate a verbose mode with -DBLAS_VERBOSE=ON at cmake configure."
                        "\nYou could also specify a BLAS vendor to look for by setting -DBLA_VENDOR=blas_vendor_name."
                        "\nList of possible BLAS vendor: Goto, ATLAS PhiPACK, CXML, DXML, SunPerf, SCSL, SGIMATH, IBMESSL, Intel10_32 (intel mkl v10 32 bit),"
                        "Intel10_64lp (intel mkl v10 64 bit, lp thread model, lp64 model), Intel10_64lp_seq (intel mkl v10 64 bit, sequential code, lp64 model),"
                        "Intel( older versions of mkl 32 and 64 bit), ACML, ACML_MP, ACML_GPU, Apple, NAS, Generic")
            if(BLAS_FIND_REQUIRED)
                message(FATAL_ERROR
                "A required library with BLAS95 API not found. Please specify library location.")
            else()
                message(STATUS
                "A library with BLAS95 API not found. Please specify library location.")
            endif()
        endif(BLAS95_FOUND)
    endif(NOT BLAS_FIND_QUIETLY)

    set(BLAS_FOUND TRUE)
    set(BLAS_LIBRARIES "${BLAS95_LIBRARIES}")
1031 1032 1033
    if (NOT BLAS_LIBRARIES_DEP)
        set(BLAS_LIBRARIES_DEP "${BLAS95_LIBRARIES}")
    endif()
1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049

else(BLA_F95)

    if(BLAS_LIBRARIES)
        set(BLAS_FOUND TRUE)
    else()
        set(BLAS_FOUND FALSE)
    endif()

    if(NOT BLAS_FIND_QUIETLY)
        if(BLAS_FOUND)
            message(STATUS "A library with BLAS API found.")
            message(STATUS "BLAS_LIBRARIES ${BLAS_LIBRARIES}")
        else(BLAS_FOUND)
            message(WARNING "BLA_VENDOR has been set to ${BLA_VENDOR} but blas libraries could not be found or check of symbols failed."
                        "\nPlease indicate where to find blas libraries. You have three options:\n"
1050
                        "- Option 1: Provide the installation directory of BLAS library with cmake option: -DBLAS_DIR=your/path/to/blas\n"
1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070
                        "- Option 2: Provide the directory where to find BLAS libraries with cmake option: -DBLAS_LIBDIR=your/path/to/blas/libs\n"
                        "- Option 3: Update your environment variable (Linux: LD_LIBRARY_PATH, Windows: LIB, Mac: DYLD_LIBRARY_PATH)\n"
                        "\nTo follow libraries detection more precisely you can activate a verbose mode with -DBLAS_VERBOSE=ON at cmake configure."
                        "\nYou could also specify a BLAS vendor to look for by setting -DBLA_VENDOR=blas_vendor_name."
                        "\nList of possible BLAS vendor: Goto, ATLAS PhiPACK, CXML, DXML, SunPerf, SCSL, SGIMATH, IBMESSL, Intel10_32 (intel mkl v10 32 bit),"
                        "Intel10_64lp (intel mkl v10 64 bit, lp thread model, lp64 model), Intel10_64lp_seq (intel mkl v10 64 bit, sequential code, lp64 model),"
                        "Intel( older versions of mkl 32 and 64 bit), ACML, ACML_MP, ACML_GPU, Apple, NAS, Generic")
            if(BLAS_FIND_REQUIRED)
                message(FATAL_ERROR
                    "A required library with BLAS API not found. Please specify library location.")
            else()
                message(STATUS
                    "A library with BLAS API not found. Please specify library location.")
            endif()
        endif(BLAS_FOUND)
    endif(NOT BLAS_FIND_QUIETLY)

endif(BLA_F95)

set(CMAKE_FIND_LIBRARY_SUFFIXES ${_blas_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES})
1071

1072
if (BLAS_FOUND)
1073 1074 1075 1076
    list(GET BLAS_LIBRARIES 0 first_lib)
    get_filename_component(first_lib_path "${first_lib}" PATH)
    if (${first_lib_path} MATCHES "(/lib(32|64)?$)|(/lib/intel64$|/lib/ia32$)")
        string(REGEX REPLACE "(/lib(32|64)?$)|(/lib/intel64$|/lib/ia32$)" "" not_cached_dir "${first_lib_path}")
1077
        set(BLAS_DIR_FOUND "${not_cached_dir}" CACHE PATH "Installation directory of BLAS library" FORCE)
1078
    else()
1079
        set(BLAS_DIR_FOUND "${first_lib_path}" CACHE PATH "Installation directory of BLAS library" FORCE)
1080 1081 1082
    endif()
endif()