path: root/eigen/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 )
  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(_libraries_work)
  endforeach(_library ${_list})

  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}} ${_thread})
  else(_libraries_work)
    set(${LIBRARIES} FALSE)
  endif(_libraries_work)

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")

  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(CMAKE_C_COMPILER_ID STREQUAL "Intel")
      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 (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
	    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 (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
	    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 (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}"
	    "${SEARCH_LIBS}"
	    "${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 (_LANGUAGES_ MATCHES C OR _LANGUAGES_ MATCHES CXX)
  endif(NOT BLAS_LIBRARIES OR BLA_VENDOR MATCHES "Intel*")
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"
      ""
      )
    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 (BLA_VENDOR STREQUAL "Goto" OR BLA_VENDOR STREQUAL "All")


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


# 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 (BLA_VENDOR STREQUAL "Eigen" 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"
      ""
      )
    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 (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"
      ""
      )
    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 (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"
      ""
      )
    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 (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"
      ""
      )
    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 (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()
    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(_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"
      ""
      )
    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 (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"
      ""
      )
    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 (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"
      ""
      )
    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 (BLA_VENDOR STREQUAL "NAS" OR BLA_VENDOR STREQUAL "All")


# 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 (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"
	"- 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(BLAS95_FOUND)
  endif(NOT BLAS_FIND_QUIETLY)

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

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"
	"- 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(BLAS_FOUND)
  endif(NOT BLAS_FIND_QUIETLY)

endif(BLA_F95)

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)