moved BLAS/LAPACK detection scripts from opencv_contrib/dnn to the main repository (#7918)

* moved BLAS/LAPACK detection scripts from opencv_contrib/dnn to the main repository.

* trying to fix the bug with undefined symbols sgesdd_ and dgesdd_

* removed extra whitespaces; disabled LAPACK on IOS

CMakeLists.txt

@@ -227,7 +227,7 @@ OCV_OPTION(WITH_VA             "Include VA support"                          OFF
 OCV_OPTION(WITH_VA_INTEL       "Include Intel VA-API/OpenCL support"         OFF  IF (UNIX AND NOT ANDROID) )
 OCV_OPTION(WITH_GDAL           "Include GDAL Support"                        OFF  IF (NOT ANDROID AND NOT IOS AND NOT WINRT) )
 OCV_OPTION(WITH_GPHOTO2        "Include gPhoto2 library support"             ON   IF (UNIX AND NOT ANDROID) )
-OCV_OPTION(WITH_LAPACK         "Include Lapack library support"              ON   IF (NOT ANDROID) )
+OCV_OPTION(WITH_LAPACK         "Include Lapack library support"              ON   IF (NOT ANDROID AND NOT IOS) )
 
 # OpenCV build components
 # ===================================================
@@ -556,6 +556,7 @@ include(cmake/OpenCVFindLibsGrfmt.cmake)
 include(cmake/OpenCVFindLibsGUI.cmake)
 include(cmake/OpenCVFindLibsVideo.cmake)
 include(cmake/OpenCVFindLibsPerf.cmake)
+include(cmake/OpenCVFindLAPACK.cmake)
 
 # ----------------------------------------------------------------------------
 #  Detect other 3rd-party libraries/tools
@@ -1222,7 +1223,7 @@ status("    Use Intel VA-API/OpenCL:"  HAVE_VA_INTEL       THEN "YES (MSDK: ${VA
 endif(DEFINED WITH_VA_INTEL)
 
 if(DEFINED WITH_LAPACK)
-status("    Use Lapack:"      HAVE_LAPACK     THEN "YES" ELSE NO)
+status("    Use Lapack:"      HAVE_LAPACK     THEN "YES (${LAPACK_LIBRARIES})" ELSE NO)
 endif(DEFINED WITH_LAPACK)
 
 status("    Use Eigen:"      HAVE_EIGEN       THEN "YES (ver ${EIGEN_WORLD_VERSION}.${EIGEN_MAJOR_VERSION}.${EIGEN_MINOR_VERSION})" ELSE NO)

cmake/OpenCVFindAtlas.cmake

@@ -0,0 +1,97 @@
+#COPYRIGHT
+#
+#All contributions by the University of California:
+#Copyright (c) 2014, 2015, The Regents of the University of California (Regents)
+#All rights reserved.
+#
+#All other contributions:
+#Copyright (c) 2014, 2015, the respective contributors
+#All rights reserved.
+#
+#Caffe uses a shared copyright model: each contributor holds copyright over
+#their contributions to Caffe. The project versioning records all such
+#contribution and copyright details. If a contributor wants to further mark
+#their specific copyright on a particular contribution, they should indicate
+#their copyright solely in the commit message of the change when it is
+#committed.
+#
+#LICENSE
+#
+#Redistribution and use in source and binary forms, with or without
+#modification, are permitted provided that the following conditions are met:
+#
+#1. Redistributions of source code must retain the above copyright notice, this
+#   list of conditions and the following disclaimer.
+#2. Redistributions in binary form must reproduce the above copyright notice,
+#   this list of conditions and the following disclaimer in the documentation
+#   and/or other materials provided with the distribution.
+#
+#THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+#ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+#WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+#DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+#ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+#(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+#LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+#ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+#SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+#CONTRIBUTION AGREEMENT
+#
+#By contributing to the BVLC/caffe repository through pull-request, comment,
+#or otherwise, the contributor releases their content to the
+#license and copyright terms herein.
+
+
+# Find the Atlas (and Lapack) libraries
+#
+# The following variables are optionally searched for defaults
+#  Atlas_ROOT_DIR:            Base directory where all Atlas components are found
+#
+# The following are set after configuration is done:
+#  Atlas_FOUND
+#  Atlas_INCLUDE_DIRS
+#  Atlas_LIBRARIES
+#  Atlas_LIBRARYRARY_DIRS
+
+set(Atlas_INCLUDE_SEARCH_PATHS
+  /usr/include/atlas
+  /usr/include/atlas-base
+  $ENV{Atlas_ROOT_DIR}
+  $ENV{Atlas_ROOT_DIR}/include
+)
+
+set(Atlas_LIB_SEARCH_PATHS
+  /usr/lib/atlas
+  /usr/lib/atlas-base
+  $ENV{Atlas_ROOT_DIR}
+  $ENV{Atlas_ROOT_DIR}/lib
+)
+
+find_path(Atlas_CBLAS_INCLUDE_DIR   NAMES cblas.h   PATHS ${Atlas_INCLUDE_SEARCH_PATHS})
+find_path(Atlas_CLAPACK_INCLUDE_DIR NAMES lapacke.h PATHS ${Atlas_INCLUDE_SEARCH_PATHS})
+
+find_library(Atlas_CBLAS_LIBRARY NAMES  ptcblas_r ptcblas cblas_r cblas PATHS ${Atlas_LIB_SEARCH_PATHS})
+find_library(Atlas_BLAS_LIBRARY NAMES   atlas_r   atlas                 PATHS ${Atlas_LIB_SEARCH_PATHS})
+find_library(Atlas_LAPACK_LIBRARY NAMES lapack alapack_r alapack lapack_atlas  PATHS ${Atlas_LIB_SEARCH_PATHS})
+
+set(LOOKED_FOR
+  Atlas_CBLAS_INCLUDE_DIR
+  Atlas_CLAPACK_INCLUDE_DIR
+
+  Atlas_CBLAS_LIBRARY
+  Atlas_BLAS_LIBRARY
+  Atlas_LAPACK_LIBRARY
+)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Atlas DEFAULT_MSG ${LOOKED_FOR})
+
+if(ATLAS_FOUND)
+  set(Atlas_INCLUDE_DIR ${Atlas_CBLAS_INCLUDE_DIR} ${Atlas_CLAPACK_INCLUDE_DIR})
+  set(Atlas_LIBRARIES ${Atlas_LAPACK_LIBRARY} ${Atlas_CBLAS_LIBRARY} ${Atlas_BLAS_LIBRARY})
+  mark_as_advanced(${LOOKED_FOR})
+
+  message(STATUS "Found Atlas (include: ${Atlas_CBLAS_INCLUDE_DIR}, library: ${Atlas_BLAS_LIBRARY})")
+endif(ATLAS_FOUND)

cmake/OpenCVFindLAPACK.cmake

@@ -0,0 +1,78 @@
+macro(_find_file_in_dirs VAR NAME DIRS)
+    find_path(${VAR} ${NAME} ${DIRS} NO_DEFAULT_PATH)
+    set(${VAR} ${${VAR}}/${NAME})
+    unset(${VAR} CACHE)
+endmacro()
+
+if(WITH_LAPACK)
+    ocv_update(LAPACK_IMPL "Unknown")
+    if(NOT LAPACK_LIBRARIES)
+        include(cmake/OpenCVFindMKL.cmake)
+        if(HAVE_MKL)
+            set(LAPACK_INCLUDE_DIR  ${MKL_INCLUDE_DIRS})
+            set(LAPACK_LIBRARIES    ${MKL_LIBRARIES}   )
+            set(LAPACK_CBLAS_H      "mkl_cblas.h"      )
+            set(LAPACK_LAPACKE_H    "mkl_lapacke.h"    )
+            set(LAPACK_IMPL         "MKL")
+        endif()
+    endif()
+    #if(NOT LAPACK_LIBRARIES)
+    #    include(cmake/OpenCVFindOpenBLAS.cmake)
+    #    if(OpenBLAS_FOUND)
+    #        set(LAPACK_INCLUDE_DIR  ${OpenBLAS_INCLUDE_DIR} )
+    #        set(LAPACK_LIBRARIES    ${OpenBLAS_LIB}         )
+    #        set(LAPACK_CBLAS_H      "cblas.h"      )
+    #        set(LAPACK_LAPACKE_H    "lapacke.h"    )
+    #        set(LAPACK_IMPL         "OpenBLAS")
+    #    endif()
+    #endif()
+    if(NOT LAPACK_LIBRARIES AND UNIX)
+        include(cmake/OpenCVFindAtlas.cmake)
+        if(ATLAS_FOUND)
+            set(LAPACK_INCLUDE_DIR  ${Atlas_INCLUDE_DIR})
+            set(LAPACK_LIBRARIES    ${Atlas_LIBRARIES}  )
+            set(LAPACK_CBLAS_H      "cblas.h"      )
+            set(LAPACK_LAPACKE_H    "lapacke.h"    )
+            set(LAPACK_IMPL "Atlas")
+        endif()
+    endif()
+
+    if(NOT LAPACK_LIBRARIES AND APPLE)
+        set(LAPACK_INCLUDE_DIR  "Accelerate")
+        set(LAPACK_LIBRARIES    "-framework Accelerate")
+        set(LAPACK_CBLAS_H      "cblas.h"      )
+        set(LAPACK_LAPACKE_H    "lapacke.h"    )
+        set(LAPACK_IMPL         "Apple")
+    endif()
+
+    set(LAPACK_INCLUDE_DIR  ${LAPACK_INCLUDE_DIR}            CACHE PATH      "Path to BLAS include dir" FORCE)
+    set(LAPACK_CBLAS_H      ${LAPACK_CBLAS_H}     CACHE STRING    "Alternative name of cblas.h" FORCE)
+    set(LAPACK_LAPACKE_H    ${LAPACK_LAPACKE_H}   CACHE STRING    "Alternative name of lapacke.h" FORCE)
+    set(LAPACK_LIBRARIES    ${LAPACK_LIBRARIES}            CACHE STRING    "Names of BLAS & LAPACK binaries (.so, .dll, .a, .lib)" FORCE)
+    set(LAPACK_IMPL ${LAPACK_IMPL} CACHE STRING "Lapack implementation id" FORCE)
+
+    if(LAPACK_LIBRARIES) #adding proxy cblas.h header
+        message(STATUS "LAPACK_IMPL: ${LAPACK_IMPL}, LAPACK_LIBRARIES: ${LAPACK_LIBRARIES}")
+        if("${LAPACK_IMPL}" STREQUAL "Apple")
+            set(CBLAS_H_PATH "Accelerate/Accelerate.h")
+            set(LAPACKE_H_PATH "Accelerate/Accelerate.h")
+        else()
+            _find_file_in_dirs(CBLAS_H_PATH "${LAPACK_CBLAS_H}" "${LAPACK_INCLUDE_DIR}")
+            _find_file_in_dirs(LAPACKE_H_PATH "${LAPACK_LAPACKE_H}" "${LAPACK_INCLUDE_DIR}")
+        endif()
+        if(NOT CBLAS_H_PATH OR NOT LAPACKE_H_PATH)
+            message(WARNING "CBLAS/LAPACK headers are not found in '${LAPACK_INCLUDE_DIR}'")
+        endif()
+        ocv_include_directories(${LAPACK_INCLUDE_DIR})
+        list(APPEND OPENCV_LINKER_LIBS ${LAPACK_LIBRARIES})
+        set(HAVE_LAPACK 1)
+
+        set(CBLAS_H_PROXY_PATH ${CMAKE_BINARY_DIR}/opencv_lapack.h)
+        set(_include_str "\#include \"${CBLAS_H_PATH}\"")
+        if("${CBLAS_H_PATH}" STREQUAL "${LAPACKE_H_PATH}")
+        else()
+            set(_include_str "${_include_str}\n\#include \"${LAPACKE_H_PATH}\"")
+        endif()
+        file(WRITE ${CBLAS_H_PROXY_PATH} ${_include_str})
+    endif()
+endif()

cmake/OpenCVFindLibsPerf.cmake

@@ -3,33 +3,29 @@
 # ----------------------------------------------------------------------------
 
 # --- Lapack ---
-if(WITH_LAPACK)
+# if(WITH_LAPACK)
-  if(WIN32)
+#   if(WIN32)
-    set(BLA_STATIC 1)
+#     set(BLA_STATIC 1)
-  endif()
+#   endif()
-  find_package(LAPACK)
+#   find_package(LAPACK)
-  if(LAPACK_FOUND)
+#   if(LAPACK_FOUND)
-    find_path(LAPACKE_INCLUDE_DIR "lapacke.h")
+#     find_path(LAPACKE_INCLUDE_DIR "lapacke.h")
-    find_path(MKL_LAPACKE_INCLUDE_DIR "mkl_lapack.h")
+#     find_path(MKL_LAPACKE_INCLUDE_DIR "mkl_lapack.h")
-    if(LAPACKE_INCLUDE_DIR OR MKL_LAPACKE_INCLUDE_DIR)
+#     if(LAPACKE_INCLUDE_DIR)
-      find_path(CBLAS_INCLUDE_DIR "cblas.h")
+#       ocv_include_directories(${LAPACKE_INCLUDE_DIR})
-      find_path(MKL_CBLAS_INCLUDE_DIR "mkl_cblas.h")
+#       set(HAVE_LAPACK 1)
-
+#       set(HAVE_LAPACK_GENERIC 1)
-      if(CBLAS_INCLUDE_DIR OR MKL_CBLAS_INCLUDE_DIR)
+#     elseif(MKL_LAPACKE_INCLUDE_DIR)
-        set(HAVE_LAPACK 1)
+#       ocv_include_directories(${MKL_LAPACKE_INCLUDE_DIR})
-
+#       set(HAVE_LAPACK 1)
-      if(CBLAS_INCLUDE_DIR)
+#       set(HAVE_LAPACK_MKL 1)
-        ocv_include_directories(${LAPACKE_INCLUDE_DIR} ${CBLAS_INCLUDE_DIR})
+#     elseif(APPLE)
-        set(HAVE_LAPACK_GENERIC 1)
+#       set(HAVE_LAPACK 1)
-      elseif(MKL_CBLAS_INCLUDE_DIR)
+#       set(HAVE_LAPACK_APPLE 1)
-        ocv_include_directories(${MKL_LAPACKE_INCLUDE_DIR} ${MKL_CBLAS_INCLUDE_DIR})
+#     endif()
-        set(HAVE_LAPACK_MKL 1)
+#     list(APPEND OPENCV_LINKER_LIBS ${LAPACK_LIBRARIES})
-      endif()
+#   endif()
-        list(APPEND OPENCV_LINKER_LIBS ${LAPACK_LIBRARIES})
+# endif()
-      endif()
-    endif()
-  endif()
-endif()
 
 # --- TBB ---
 if(WITH_TBB)

cmake/OpenCVFindMKL.cmake

@@ -0,0 +1,136 @@
+#
+# The script to detect Intel(R) Math Kernel Library (MKL)
+# installation/package
+#
+# Parameters:
+# MKL_WITH_TBB
+#
+# On return this will define:
+#
+# HAVE_MKL          - True if Intel IPP found
+# MKL_ROOT_DIR      - root of IPP installation
+# MKL_INCLUDE_DIRS  - IPP include folder
+# MKL_LIBRARIES     - IPP libraries that are used by OpenCV
+#
+
+macro (mkl_find_lib VAR NAME DIRS)
+    find_path(${VAR} ${NAME} ${DIRS} NO_DEFAULT_PATH)
+    set(${VAR} ${${VAR}}/${NAME})
+    unset(${VAR} CACHE)
+endmacro()
+
+macro(mkl_fail)
+    set(HAVE_MKL OFF CACHE BOOL "True if MKL found")
+    set(MKL_ROOT_DIR ${MKL_ROOT_DIR} CACHE PATH "Path to MKL directory")
+    unset(MKL_INCLUDE_DIRS CACHE)
+    unset(MKL_LIBRARIES CACHE)
+    return()
+endmacro()
+
+macro(get_mkl_version VERSION_FILE)
+    # read MKL version info from file
+    file(STRINGS ${VERSION_FILE} STR1 REGEX "__INTEL_MKL__")
+    file(STRINGS ${VERSION_FILE} STR2 REGEX "__INTEL_MKL_MINOR__")
+    file(STRINGS ${VERSION_FILE} STR3 REGEX "__INTEL_MKL_UPDATE__")
+    #file(STRINGS ${VERSION_FILE} STR4 REGEX "INTEL_MKL_VERSION")
+
+    # extract info and assign to variables
+    string(REGEX MATCHALL "[0-9]+" MKL_VERSION_MAJOR ${STR1})
+    string(REGEX MATCHALL "[0-9]+" MKL_VERSION_MINOR ${STR2})
+    string(REGEX MATCHALL "[0-9]+" MKL_VERSION_UPDATE ${STR3})
+    set(MKL_VERSION_STR "${MKL_VERSION_MAJOR}.${MKL_VERSION_MINOR}.${MKL_VERSION_UPDATE}" CACHE STRING "MKL version" FORCE)
+endmacro()
+
+
+if(NOT DEFINED MKL_USE_MULTITHREAD)
+    OCV_OPTION(MKL_WITH_TBB "Use MKL with TBB multithreading" OFF)#ON IF WITH_TBB)
+    OCV_OPTION(MKL_WITH_OPENMP "Use MKL with OpenMP multithreading" OFF)#ON IF WITH_OPENMP)
+endif()
+
+#check current MKL_ROOT_DIR
+if(NOT MKL_ROOT_DIR OR NOT EXISTS ${MKL_ROOT_DIR}/include/mkl.h)
+    set(mkl_root_paths ${MKL_ROOT_DIR})
+    if(DEFINED $ENV{MKLROOT})
+        list(APPEND mkl_root_paths $ENV{MKLROOT})
+    endif()
+    if(WIN32)
+        set(ProgramFilesx86 "ProgramFiles(x86)")
+        list(APPEND mkl_root_paths $ENV{${ProgramFilesx86}}/IntelSWTools/compilers_and_libraries/windows/mkl)
+    endif()
+    if(UNIX)
+        list(APPEND mkl_root_paths "/opt/intel/mkl")
+    endif()
+
+    find_path(MKL_ROOT_DIR include/mkl.h PATHS ${mkl_root_paths})
+endif()
+
+if(NOT MKL_ROOT_DIR)
+    mkl_fail()
+endif()
+
+set(MKL_INCLUDE_DIRS ${MKL_ROOT_DIR}/include)
+get_mkl_version(${MKL_INCLUDE_DIRS}/mkl_version.h)
+
+#determine arch
+if(CMAKE_CXX_SIZEOF_DATA_PTR EQUAL 8)
+    set(MKL_X64 1)
+    set(MKL_ARCH "intel64")
+
+    include(CheckTypeSize)
+    CHECK_TYPE_SIZE(int _sizeof_int)
+    if (_sizeof_int EQUAL 4)
+        set(MKL_LP64 "lp64")
+    else()
+        set(MKL_LP64 "ilp64")
+    endif()
+else()
+    set(MKL_ARCH "ia32")
+endif()
+
+if(${MKL_VERSION_STR} VERSION_GREATER "11.3.0" OR ${MKL_VERSION_STR} VERSION_EQUAL "11.3.0")
+    set(mkl_lib_find_paths
+        ${MKL_ROOT_DIR}/lib
+        ${MKL_ROOT_DIR}/lib/${MKL_ARCH} ${MKL_ROOT_DIR}/../tbb/lib/${MKL_ARCH})
+
+    set(mkl_lib_list
+        mkl_core
+        mkl_intel_${MKL_LP64})
+
+    if(MKL_WITH_TBB)
+        list(APPEND mkl_lib_list mkl_tbb_thread tbb)
+    elseif(MKL_WITH_OPENMP)
+        if(MSVC)
+            list(APPEND mkl_lib_list mkl_intel_thread libiomp5md)
+        else()
+            list(APPEND mkl_lib_list libmkl_gnu_thread)
+        endif()
+    else()
+        list(APPEND mkl_lib_list mkl_sequential)
+    endif()
+else()
+    message(STATUS "MKL version ${MKL_VERSION_STR} is not supported")
+    mkl_fail()
+endif()
+
+
+set(MKL_LIBRARIES "")
+foreach(lib ${mkl_lib_list})
+    find_library(${lib} ${lib} ${mkl_lib_find_paths})
+    mark_as_advanced(${lib})
+    if(NOT ${lib})
+        mkl_fail()
+    endif()
+    list(APPEND MKL_LIBRARIES ${${lib}})
+endforeach()
+
+message(STATUS "Found MKL ${MKL_VERSION_STR} at: ${MKL_ROOT_DIR}")
+set(HAVE_MKL ON CACHE BOOL "True if MKL found")
+set(MKL_ROOT_DIR ${MKL_ROOT_DIR} CACHE PATH "Path to MKL directory")
+set(MKL_INCLUDE_DIRS ${MKL_INCLUDE_DIRS} CACHE PATH "Path to MKL include directory")
+if(NOT UNIX)
+    set(MKL_LIBRARIES ${MKL_LIBRARIES} CACHE FILEPATH "MKL libarries")
+else()
+    #it's ugly but helps to avoid cyclic lib problem
+    set(MKL_LIBRARIES ${MKL_LIBRARIES} ${MKL_LIBRARIES} ${MKL_LIBRARIES} "-lpthread" "-lm" "-ldl")
+    set(MKL_LIBRARIES ${MKL_LIBRARIES} CACHE STRING "MKL libarries")
+endif()

cmake/OpenCVFindOpenBLAS.cmake

@@ -0,0 +1,106 @@
+#COPYRIGHT
+#
+#All contributions by the University of California:
+#Copyright (c) 2014, 2015, The Regents of the University of California (Regents)
+#All rights reserved.
+#
+#All other contributions:
+#Copyright (c) 2014, 2015, the respective contributors
+#All rights reserved.
+#
+#Caffe uses a shared copyright model: each contributor holds copyright over
+#their contributions to Caffe. The project versioning records all such
+#contribution and copyright details. If a contributor wants to further mark
+#their specific copyright on a particular contribution, they should indicate
+#their copyright solely in the commit message of the change when it is
+#committed.
+#
+#LICENSE
+#
+#Redistribution and use in source and binary forms, with or without
+#modification, are permitted provided that the following conditions are met:
+#
+#1. Redistributions of source code must retain the above copyright notice, this
+#   list of conditions and the following disclaimer.
+#2. Redistributions in binary form must reproduce the above copyright notice,
+#   this list of conditions and the following disclaimer in the documentation
+#   and/or other materials provided with the distribution.
+#
+#THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+#ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+#WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+#DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+#ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+#(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+#LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+#ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+#SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+#CONTRIBUTION AGREEMENT
+#
+#By contributing to the BVLC/caffe repository through pull-request, comment,
+#or otherwise, the contributor releases their content to the
+#license and copyright terms herein.
+
+SET(Open_BLAS_INCLUDE_SEARCH_PATHS
+  /usr/include
+  /usr/include/openblas
+  /usr/include/openblas-base
+  /usr/local/include
+  /usr/local/include/openblas
+  /usr/local/include/openblas-base
+  /opt/OpenBLAS/include
+  $ENV{OpenBLAS_HOME}
+  $ENV{OpenBLAS_HOME}/include
+)
+
+SET(Open_BLAS_LIB_SEARCH_PATHS
+        /lib/
+        /lib/openblas-base
+        /lib64/
+        /usr/lib
+        /usr/lib/openblas-base
+        /usr/lib64
+        /usr/local/lib
+        /usr/local/lib64
+        /opt/OpenBLAS/lib
+        $ENV{OpenBLAS}cd
+        $ENV{OpenBLAS}/lib
+        $ENV{OpenBLAS_HOME}
+        $ENV{OpenBLAS_HOME}/lib
+ )
+
+FIND_PATH(OpenBLAS_INCLUDE_DIR NAMES cblas.h PATHS ${Open_BLAS_INCLUDE_SEARCH_PATHS})
+FIND_LIBRARY(OpenBLAS_LIB NAMES openblas PATHS ${Open_BLAS_LIB_SEARCH_PATHS})
+
+SET(OpenBLAS_FOUND ON)
+
+#    Check include files
+IF(NOT OpenBLAS_INCLUDE_DIR)
+    SET(OpenBLAS_FOUND OFF)
+    MESSAGE(STATUS "Could not find OpenBLAS include. Turning OpenBLAS_FOUND off")
+ENDIF()
+
+#    Check libraries
+IF(NOT OpenBLAS_LIB)
+    SET(OpenBLAS_FOUND OFF)
+    MESSAGE(STATUS "Could not find OpenBLAS lib. Turning OpenBLAS_FOUND off")
+ENDIF()
+
+IF (OpenBLAS_FOUND)
+  IF (NOT OpenBLAS_FIND_QUIETLY)
+    MESSAGE(STATUS "Found OpenBLAS libraries: ${OpenBLAS_LIB}")
+    MESSAGE(STATUS "Found OpenBLAS include: ${OpenBLAS_INCLUDE_DIR}")
+  ENDIF (NOT OpenBLAS_FIND_QUIETLY)
+ELSE (OpenBLAS_FOUND)
+  IF (OpenBLAS_FIND_REQUIRED)
+    MESSAGE(FATAL_ERROR "Could not find OpenBLAS")
+  ENDIF (OpenBLAS_FIND_REQUIRED)
+ENDIF (OpenBLAS_FOUND)
+
+MARK_AS_ADVANCED(
+    OpenBLAS_INCLUDE_DIR
+    OpenBLAS_LIB
+    OpenBLAS
+)

cmake/templates/cvconfig.h.in

@@ -198,12 +198,6 @@
 /* Lapack */
 #cmakedefine HAVE_LAPACK
 
-/* Lapack Generic */
-#cmakedefine HAVE_LAPACK_GENERIC
-
-/* Lapack MKL */
-#cmakedefine HAVE_LAPACK_MKL
-
 /* FP16 */
 #cmakedefine HAVE_FP16
 

modules/core/src/hal_internal.cpp

@@ -46,15 +46,7 @@
 
 #ifdef HAVE_LAPACK
 
-#ifdef HAVE_LAPACK_MKL
+#include "opencv_lapack.h"
-  #include <mkl_cblas.h>
-  #include <mkl_lapack.h>
-#endif
-
-#ifdef HAVE_LAPACK_GENERIC
-  #include <lapacke.h>
-  #include <cblas.h>
-#endif
 
 #include <cmath>
 #include <algorithm>