path: root/cmake/FindBLAS.cmake

###
#
# @copyright (c) 2009-2014 The University of Tennessee and The University
#                          of Tennessee Research Foundation.
#                          All rights reserved.
# @copyright (c) 2012-2016 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).
#  BLAS_COMPILER_FLAGS - uncached list of required compiler flags (including -I for mkl headers).
#  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
#  BLAS_VENDOR_FOUND stores the BLAS vendor found 
#  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
# The module can also look for the following environment variables if paths
# are not given as cmake variable: BLAS_DIR, BLAS_INCDIR, BLAS_LIBDIR
# For MKL case and if no paths are given as hints, we will try to use the MKLROOT
# environment variable
#  BLAS_VERBOSE Print some additional information during BLAS libraries detection
##########
### List of vendors (BLA_VENDOR) valid in this module
########## List of vendors (BLA_VENDOR) valid in this module
##  Open (for OpenBlas), Eigen (for EigenBlas), Goto, ATLAS PhiPACK,
##  CXML, DXML, SunPerf, SCSL, SGIMATH, IBMESSL, IBMESSLMT
##  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
###
# We handle different modes to find the dependency
#
# - Detection if already installed on the system
#   - BLAS libraries can be detected from different ways
#     Here is the order of precedence:
#     1) we look in cmake variable BLAS_LIBDIR or BLAS_DIR (we guess the libdirs) if defined
#     2) we look in environment variable BLAS_LIBDIR or BLAS_DIR (we guess the libdirs) if defined
#     3) we look in common environnment variables depending on the system (INCLUDE, C_INCLUDE_PATH, CPATH - LIB, DYLD_LIBRARY_PATH, LD_LIBRARY_PATH)
#     4) we look in common system paths depending on the system, see for example paths contained in the following cmake variables:
#       - CMAKE_PLATFORM_IMPLICIT_INCLUDE_DIRECTORIES, CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES
#       - CMAKE_C_IMPLICIT_INCLUDE_DIRECTORIES, CMAKE_C_IMPLICIT_LINK_DIRECTORIES
#

#=============================================================================
# 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.)

## 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 ${_lib_to_find}. You have three options:\n"
    "- Option 1: Provide the Installation directory of BLAS library with cmake option: -D${LIBNAME}_DIR=your/path/to/${libname}/\n"
    "- Option 2: Provide the directory where to find the library with cmake option: -D${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)
  set(BLAS_DIR "" CACHE PATH "Installation directory of BLAS library")
  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()

option(BLAS_VERBOSE "Print some additional information during BLAS libraries detection" OFF)
mark_as_advanced(BLAS_VERBOSE)

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 AND CMAKE_Fortran_COMPILER)
  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)
  set(${LIBRARIES})
  set(_combined_name)
  set(ENV_MKLROOT "$ENV{MKLROOT}")
  set(ENV_BLAS_DIR "$ENV{BLAS_DIR}")
  set(ENV_BLAS_LIBDIR "$ENV{BLAS_LIBDIR}")
  if (NOT _libdir)
    if (BLAS_LIBDIR)
      list(APPEND _libdir "${BLAS_LIBDIR}")
    elseif (BLAS_DIR)
      list(APPEND _libdir "${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()
    elseif(ENV_BLAS_LIBDIR)
      list(APPEND _libdir "${ENV_BLAS_LIBDIR}")
    elseif(ENV_BLAS_DIR)
      list(APPEND _libdir "${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()
    else()
      if (ENV_MKLROOT)
	list(APPEND _libdir "${ENV_MKLROOT}/lib")
	if("${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()
      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()
  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 ${_libdir}
	NO_DEFAULT_PATH
	)
      mark_as_advanced(${_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()
  endforeach()

  if(_libraries_work)
    # Test this combination of libraries.
    if (CMAKE_SYSTEM_NAME STREQUAL "Linux" AND BLA_STATIC)
      list(INSERT ${LIBRARIES} 0 "-Wl,--start-group")
      list(APPEND ${LIBRARIES} "-Wl,--end-group")
    endif()
    set(CMAKE_REQUIRED_LIBRARIES "${_flags};${${LIBRARIES}};${_thread}")
    set(CMAKE_REQUIRED_FLAGS "${BLAS_COMPILER_FLAGS}")
    if (BLAS_VERBOSE)
      message("${Cyan}BLAS libs found for BLA_VENDOR ${BLA_VENDOR}."
	"Try to compile symbol ${_name} with following libraries:"
	"${CMAKE_REQUIRED_LIBRARIES}")
    endif ()
    if(NOT BLAS_FOUND)
      unset(${_prefix}${_combined_name}_WORKS CACHE)
    endif()
    if (_CHECK_FORTRAN)
      if (CMAKE_Fortran_COMPILER_ID STREQUAL "GNU")
	string(REPLACE "mkl_intel_lp64" "mkl_gf_lp64" CMAKE_REQUIRED_LIBRARIES "${CMAKE_REQUIRED_LIBRARIES}")
	string(REPLACE "mkl_intel_ilp64" "mkl_gf_ilp64" CMAKE_REQUIRED_LIBRARIES "${CMAKE_REQUIRED_LIBRARIES}")
      endif()
      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)
    set(${LIBRARIES} ${${LIBRARIES}} ${_thread})
  else()
    set(${LIBRARIES} FALSE)
  endif()

endmacro()


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")

  if(NOT BLAS_LIBRARIES OR BLA_VENDOR MATCHES "Intel*")
    # 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()

    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}")
    # libiomp5
    # --------
    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 "")
    # libgomp
    # -------
    set(OMP_gomp_LIBRARY "OMP_gomp_LIBRARY-NOTFOUND")
    find_library(OMP_gomp_LIBRARY
      NAMES gomp
      HINTS ${_libdir}
      )
    mark_as_advanced(OMP_gomp_LIBRARY)
    # choose one or another depending on the compilo
    if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
      if (OMP_gomp_LIBRARY)
	set(OMP_LIB "${OMP_gomp_LIBRARY}")
      endif()
    else()
      if (OMP_iomp5_LIBRARY)
	set(OMP_LIB "${OMP_iomp5_LIBRARY}")
      endif()
    endif()

    if (UNIX AND NOT WIN32)
      # m
      find_library(M_LIBRARY
	NAMES m
	HINTS ${_libdir})
      mark_as_advanced(M_LIBRARY)
      if(M_LIBRARY)
	set(LM "-lm")
      else()
	set(LM "")
      endif()
      # Fortran
      set(LGFORTRAN "")
      if (CMAKE_C_COMPILER_ID MATCHES "GNU")
	find_library(
	  FORTRAN_gfortran_LIBRARY
	  NAMES gfortran
	  HINTS ${_libdir}
	  )
	mark_as_advanced(FORTRAN_gfortran_LIBRARY)
	if (FORTRAN_gfortran_LIBRARY)
	  set(LGFORTRAN "${FORTRAN_gfortran_LIBRARY}")
	endif()
      elseif (CMAKE_C_COMPILER_ID MATCHES "Intel")
	find_library(
	  FORTRAN_ifcore_LIBRARY
	  NAMES ifcore
	  HINTS ${_libdir}
	  )
	mark_as_advanced(FORTRAN_ifcore_LIBRARY)
	if (FORTRAN_ifcore_LIBRARY)
	  set(LGFORTRAN "{FORTRAN_ifcore_LIBRARY}")
	endif()
      endif()
      set(BLAS_COMPILER_FLAGS "")
      if (NOT BLA_VENDOR STREQUAL "Intel10_64lp_seq")
	if (CMAKE_C_COMPILER_ID STREQUAL "Intel")
	  list(APPEND BLAS_COMPILER_FLAGS "-openmp")
	endif()
	if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
	  list(APPEND BLAS_COMPILER_FLAGS "-fopenmp")
	endif()
      endif()
      if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
	if (BLA_VENDOR STREQUAL "Intel10_32")
	  list(APPEND BLAS_COMPILER_FLAGS "-m32")
	else()
	  list(APPEND BLAS_COMPILER_FLAGS "-m64")
	endif()
	if (NOT BLA_VENDOR STREQUAL "Intel10_64lp_seq")
	  list(APPEND OMP_LIB "-ldl")
	endif()
	if (ENV_MKLROOT)
	  list(APPEND BLAS_COMPILER_FLAGS "-I${ENV_MKLROOT}/include")
	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()
    endif ()

    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 ()
	  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
	    if (CMAKE_C_COMPILER_ID STREQUAL "Intel")
	      list(APPEND BLAS_SEARCH_LIBS
		"mkl_blas95_lp64 mkl_intel_lp64 mkl_intel_thread mkl_core")
	    endif()
	    if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
	      list(APPEND BLAS_SEARCH_LIBS
		"mkl_blas95_lp64 mkl_intel_lp64 mkl_gnu_thread mkl_core")
	    endif()
	  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")
	    if (BLA_VENDOR STREQUAL "Intel10_64lp_seq")
	      set(OMP_LIB "")
	    endif()
	  endif ()
	endif ()

      else ()

	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 ()
	  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
	    if (CMAKE_C_COMPILER_ID STREQUAL "Intel")
	      list(APPEND BLAS_SEARCH_LIBS
		"mkl_intel_lp64 mkl_intel_thread mkl_core")
	    endif()
	    if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
	      list(APPEND BLAS_SEARCH_LIBS
		"mkl_intel_lp64 mkl_gnu_thread mkl_core")
	    endif()
	  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")
	    if (BLA_VENDOR STREQUAL "Intel10_64lp_seq")
	      set(OMP_LIB "")
	    endif()
	  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 ()

      endif ()

      foreach (IT ${BLAS_SEARCH_LIBS})
	string(REPLACE " " ";" SEARCH_LIBS ${IT})
	if (${_LIBRARIES})
	else ()
	  check_fortran_libraries(
	    ${_LIBRARIES}
	    BLAS
	    ${BLAS_mkl_SEARCH_SYMBOL}
	    "${additional_flags}"
	    "${SEARCH_LIBS}"
	    "${OMP_LIB};${CMAKE_THREAD_LIBS_INIT};${LM}"
	    )
	  if(_LIBRARIES)
	    set(BLAS_LINKER_FLAGS "${additional_flags}")
	  endif()
	endif()
      endforeach ()
      if(NOT BLAS_FIND_QUIETLY)
        if(${_LIBRARIES})
          message(STATUS "Looking for MKL BLAS: found")
        else()
          message(STATUS "Looking for MKL BLAS: not found")
        endif()
      endif()
      if (${_LIBRARIES} AND NOT BLAS_VENDOR_FOUND)
          set (BLAS_VENDOR_FOUND "Intel MKL")
      endif()
    endif ()
  endif()
endif ()


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"
      ""
      )
    if(NOT BLAS_FIND_QUIETLY)
      if(BLAS_LIBRARIES)
	message(STATUS "Looking for Goto BLAS: found")
      else()
	message(STATUS "Looking for Goto BLAS: not found")
      endif()
    endif()
  endif()
  if (BLAS_LIBRARIES AND NOT BLAS_VENDOR_FOUND)
      set (BLAS_VENDOR_FOUND "Goto")
  endif()

endif ()


# OpenBlas
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"
      ""
      )
    if(NOT BLAS_FIND_QUIETLY)
      if(BLAS_LIBRARIES)
	message(STATUS "Looking for Open BLAS: found")
      else()
	message(STATUS "Looking for Open BLAS: not found")
      endif()
    endif()
  endif()
  if (BLAS_LIBRARIES AND NOT BLAS_VENDOR_FOUND)
      set (BLAS_VENDOR_FOUND "Openblas")
  endif()

endif ()


# EigenBlas
if (BLA_VENDOR STREQUAL "Eigen" OR BLA_VENDOR STREQUAL "All")

  if(NOT BLAS_LIBRARIES)
    # eigenblas (http://eigen.tuxfamily.org/index.php?title=Main_Page)
    check_fortran_libraries(
      BLAS_LIBRARIES
      BLAS
      sgemm
      ""
      "eigen_blas"
      ""
      )
    if(NOT BLAS_FIND_QUIETLY)
      if(BLAS_LIBRARIES AND NOT BLAS_VENDOR_FOUND)
	message(STATUS "Looking for Eigen BLAS: found")
      else()
	message(STATUS "Looking for Eigen BLAS: not found")
      endif()
    endif()
  endif()

  if(NOT BLAS_LIBRARIES)
    # eigenblas (http://eigen.tuxfamily.org/index.php?title=Main_Page)
    check_fortran_libraries(
      BLAS_LIBRARIES
      BLAS
      sgemm
      ""
      "eigen_blas_static"
      ""
      )
    if(NOT BLAS_FIND_QUIETLY)
      if(BLAS_LIBRARIES)
	message(STATUS "Looking for Eigen BLAS: found")
      else()
	message(STATUS "Looking for Eigen BLAS: not found")
      endif()
    endif()
  endif()
  if (BLAS_LIBRARIES AND NOT BLAS_VENDOR_FOUND)
      set (BLAS_VENDOR_FOUND "Eigen")
  endif()

endif ()


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"
      ""
      )
    if(NOT BLAS_FIND_QUIETLY)
      if(BLAS_LIBRARIES)
	message(STATUS "Looking for Atlas BLAS: found")
      else()
	message(STATUS "Looking for Atlas BLAS: not found")
      endif()
    endif()
  endif()

  if (BLAS_LIBRARIES AND NOT BLAS_VENDOR_FOUND)
      set (BLAS_VENDOR_FOUND "Atlas")
  endif()

endif ()


# 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"
      ""
      )
    if(NOT BLAS_FIND_QUIETLY)
      if(BLAS_LIBRARIES)
	message(STATUS "Looking for PhiPACK BLAS: found")
      else()
	message(STATUS "Looking for PhiPACK BLAS: not found")
      endif()
    endif()
  endif()

  if (BLAS_LIBRARIES AND NOT BLAS_VENDOR_FOUND)
      set (BLAS_VENDOR_FOUND "PhiPACK")
  endif()

endif ()


# 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"
      ""
      )
    if(NOT BLAS_FIND_QUIETLY)
      if(BLAS_LIBRARIES)
	message(STATUS "Looking for CXML BLAS: found")
      else()
	message(STATUS "Looking for CXML BLAS: not found")
      endif()
    endif()
  endif()

  if (BLAS_LIBRARIES AND NOT BLAS_VENDOR_FOUND)
      set (BLAS_VENDOR_FOUND "CXML")
  endif()

endif ()


# 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"
      ""
      )
    if(NOT BLAS_FIND_QUIETLY)
      if(BLAS_LIBRARIES)
	message(STATUS "Looking for DXML BLAS: found")
      else()
	message(STATUS "Looking for DXML BLAS: not found")
      endif()
    endif()
  endif()

  if (BLAS_LIBRARIES AND NOT BLAS_VENDOR_FOUND)
      set (BLAS_VENDOR_FOUND "DXML")
  endif()
  
endif ()


# 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()
    if(NOT BLAS_FIND_QUIETLY)
      if(BLAS_LIBRARIES)
	message(STATUS "Looking for SunPerf BLAS: found")
      else()
	message(STATUS "Looking for SunPerf BLAS: not found")
      endif()
    endif()
  endif()

  if (BLAS_LIBRARIES AND NOT BLAS_VENDOR_FOUND)
      set (BLAS_VENDOR_FOUND "SunPerf")
  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"
      ""
      )
    if(NOT BLAS_FIND_QUIETLY)
      if(BLAS_LIBRARIES)
	message(STATUS "Looking for SCSL BLAS: found")
      else()
	message(STATUS "Looking for SCSL BLAS: not found")
      endif()
    endif()
  endif()

  if (BLAS_LIBRARIES AND NOT BLAS_VENDOR_FOUND)
      set (BLAS_VENDOR_FOUND "SunPerf")
  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"
      ""
      )
    if(NOT BLAS_FIND_QUIETLY)
      if(BLAS_LIBRARIES)
	message(STATUS "Looking for SGIMATH BLAS: found")
      else()
	message(STATUS "Looking for SGIMATH BLAS: not found")
      endif()
    endif()
  endif()

  if (BLAS_LIBRARIES AND NOT BLAS_VENDOR_FOUND)
      set (BLAS_VENDOR_FOUND "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;xlfmath;xlf90_r;blas"
      ""
      )
    if(NOT BLAS_FIND_QUIETLY)
      if(BLAS_LIBRARIES)
	message(STATUS "Looking for IBM ESSL BLAS: found")
      else()
	message(STATUS "Looking for IBM ESSL BLAS: not found")
      endif()
    endif()
  endif()

  if (BLAS_LIBRARIES AND NOT BLAS_VENDOR_FOUND)
      set (BLAS_VENDOR_FOUND "IBM ESSL")
  endif()

endif ()

# BLAS in IBM ESSL_MT library (requires generic BLAS lib, too)
if (BLA_VENDOR STREQUAL "IBMESSLMT" OR BLA_VENDOR STREQUAL "All")

  if(NOT BLAS_LIBRARIES)
    check_fortran_libraries(
      BLAS_LIBRARIES
      BLAS
      sgemm
      ""
      "esslsmp;xlsmp;xlfmath;xlf90_r;blas"
      ""
      )
    if(NOT BLAS_FIND_QUIETLY)
      if(BLAS_LIBRARIES)
	message(STATUS "Looking for IBM ESSL MT BLAS: found")
      else()
	message(STATUS "Looking for IBM ESSL MT BLAS: not found")
      endif()
    endif()
  endif()

  if (BLAS_LIBRARIES AND NOT BLAS_VENDOR_FOUND)
      set (BLAS_VENDOR_FOUND "IBM ESSL MT")
  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()

  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"
      ""
      )
    if(NOT BLAS_FIND_QUIETLY)
      if(BLAS_LIBRARIES)
	message(STATUS "Looking for ACML BLAS: found")
      else()
	message(STATUS "Looking for ACML BLAS: not found")
      endif()
    endif()
  endif()

  if(NOT BLAS_LIBRARIES)
    check_fortran_libraries(
      BLAS_LIBRARIES
      BLAS
      sgemm
      ""
      "acml_mp;acml_mv"
      ""
      )
    if(NOT BLAS_FIND_QUIETLY)
      if(BLAS_LIBRARIES)
	message(STATUS "Looking for ACML BLAS: found")
      else()
	message(STATUS "Looking for ACML BLAS: not found")
      endif()
    endif()
  endif()

  if(NOT BLAS_LIBRARIES)
    check_fortran_libraries(
      BLAS_LIBRARIES
      BLAS
      sgemm
      ""
      "acml;acml_mv;CALBLAS"
      ""
      )
    if(NOT BLAS_FIND_QUIETLY)
      if(BLAS_LIBRARIES)
	message(STATUS "Looking for ACML BLAS: found")
      else()
	message(STATUS "Looking for ACML BLAS: not found")
      endif()
    endif()
  endif()

  if (BLAS_LIBRARIES AND NOT BLAS_VENDOR_FOUND)
      set (BLAS_VENDOR_FOUND "ACML")
  endif()

endif () # 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"
      ""
      )
    if(NOT BLAS_FIND_QUIETLY)
      if(BLAS_LIBRARIES)
	message(STATUS "Looking for Apple BLAS: found")
      else()
	message(STATUS "Looking for Apple BLAS: not found")
      endif()
    endif()
  endif()

  if (BLAS_LIBRARIES AND NOT BLAS_VENDOR_FOUND)
      set (BLAS_VENDOR_FOUND "Apple Accelerate")
  endif()

endif ()


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

  if ( NOT BLAS_LIBRARIES )
    check_fortran_libraries(
      BLAS_LIBRARIES
      BLAS
      dgemm
      ""
      "vecLib"
      ""
      )
    if(NOT BLAS_FIND_QUIETLY)
      if(BLAS_LIBRARIES)
	message(STATUS "Looking for NAS BLAS: found")
      else()
	message(STATUS "Looking for NAS BLAS: not found")
      endif()
    endif()
  endif ()

  if (BLAS_LIBRARIES AND NOT BLAS_VENDOR_FOUND)
      set (BLAS_VENDOR_FOUND "NAS")
  endif()

endif ()


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

  set(BLAS_SEARCH_LIBS "blas;blas_LINUX;blas_MAC;blas_WINDOWS;refblas")
  foreach (SEARCH_LIB ${BLAS_SEARCH_LIBS})
    if (BLAS_LIBRARIES)
    else ()
      check_fortran_libraries(
	BLAS_LIBRARIES
	BLAS
	sgemm
	""
	"${SEARCH_LIB}"
	"${LGFORTRAN}"
	)
      if(NOT BLAS_FIND_QUIETLY)
	if(BLAS_LIBRARIES)
	  message(STATUS "Looking for Generic BLAS: found")
	else()
	  message(STATUS "Looking for Generic BLAS: not found")
	endif()
      endif()
    endif()
  endforeach ()

  if (BLAS_LIBRARIES AND NOT BLAS_VENDOR_FOUND)
      set (BLAS_VENDOR_FOUND "Netlib or other Generic libblas")
  endif()

endif ()


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()
      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"
	"- Option 1: Provide the installation directory of BLAS library with cmake option: -DBLAS_DIR=your/path/to/blas\n"
	"- 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()
  endif()

  set(BLAS_FOUND TRUE)
  set(BLAS_LIBRARIES "${BLAS95_LIBRARIES}")

else()

  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()
      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"
	"- Option 1: Provide the installation directory of BLAS library with cmake option: -DBLAS_DIR=your/path/to/blas\n"
	"- 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()
  endif()

endif()

set(CMAKE_FIND_LIBRARY_SUFFIXES ${_blas_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES})

if (BLAS_FOUND)
  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 "${first_lib_path}")
    set(BLAS_DIR_FOUND "${not_cached_dir}" CACHE PATH "Installation directory of BLAS library" FORCE)
  else()
    set(BLAS_DIR_FOUND "${first_lib_path}" CACHE PATH "Installation directory of BLAS library" FORCE)
  endif()
endif()
mark_as_advanced(BLAS_DIR)
mark_as_advanced(BLAS_DIR_FOUND)