add default clAmdFft and clAmdBlas path

cmake/OpenCVDetectOpenCL.cmake

 if(APPLE)
-    set(OPENCL_FOUND YES)
-    set(OPENCL_LIBRARIES "-framework OpenCL")
+  set(OPENCL_FOUND YES)
+  set(OPENCL_LIBRARIES "-framework OpenCL")
 else()
-    #find_package(OpenCL QUIET)
-    if(WITH_OPENCLAMDFFT)
-            find_path(CLAMDFFT_INCLUDE_DIR
-                NAMES clAmdFft.h)
-            find_library(CLAMDFFT_LIBRARIES
-                NAMES clAmdFft.Runtime)
+  find_package(OpenCL QUIET)
+  if(WITH_OPENCLAMDFFT)
+    set(CLAMDFFT_SEARCH_PATH $ENV{CLAMDFFT_PATH})
+    if(NOT CLAMDFFT_SEARCH_PATH)
+      if(WIN32)
+        set( CLAMDFFT_SEARCH_PATH "C:\\Program Files (x86)\\AMD\\clAmdFft" )
+      endif()
     endif()
-    if(WITH_OPENCLAMDBLAS)
-            find_path(CLAMDBLAS_INCLUDE_DIR
-                NAMES clAmdBlas.h)
-            find_library(CLAMDBLAS_LIBRARIES
-                NAMES clAmdBlas)
+    set( CLAMDFFT_INCLUDE_SEARCH_PATH ${CLAMDFFT_SEARCH_PATH}/include )
+    if(UNIX)
+      if(CMAKE_SIZEOF_VOID_P EQUAL 4)
+        set(CLAMDFFT_LIB_SEARCH_PATH /usr/lib)
+      else()
+        set(CLAMDFFT_LIB_SEARCH_PATH /usr/lib64)
+      endif()
+    else()
+      if(CMAKE_SIZEOF_VOID_P EQUAL 4)
+        set(CLAMDFFT_LIB_SEARCH_PATH ${CLAMDFFT_SEARCH_PATH}\\lib32\\import)
+      else()
+        set(CLAMDFFT_LIB_SEARCH_PATH ${CLAMDFFT_SEARCH_PATH}\\lib64\\import)
+      endif()
+    endif()
+    find_path(CLAMDFFT_INCLUDE_DIR
+      NAMES clAmdFft.h
+      PATHS ${CLAMDFFT_INCLUDE_SEARCH_PATH}
+      PATH_SUFFIXES clAmdFft
+      NO_DEFAULT_PATH)
+    find_library(CLAMDFFT_LIBRARY
+      NAMES clAmdFft.Runtime
+      PATHS ${CLAMDFFT_LIB_SEARCH_PATH}
+      NO_DEFAULT_PATH)
+    if(CLAMDFFT_LIBRARY)
+      set(CLAMDFFT_LIBRARIES ${CLAMDFFT_LIBRARY})
+    else()
+      set(CLAMDFFT_LIBRARIES "")
+    endif()
+  endif()
+  if(WITH_OPENCLAMDBLAS)
+    set(CLAMDBLAS_SEARCH_PATH $ENV{CLAMDBLAS_PATH})
+    if(NOT CLAMDBLAS_SEARCH_PATH)
+      if(WIN32)
+        set( CLAMDBLAS_SEARCH_PATH "C:\\Program Files (x86)\\AMD\\clAmdBlas" )
+      endif()
+    endif()
+    set( CLAMDBLAS_INCLUDE_SEARCH_PATH ${CLAMDBLAS_SEARCH_PATH}/include )
+    if(UNIX)
+      if(CMAKE_SIZEOF_VOID_P EQUAL 4)
+        set(CLAMDBLAS_LIB_SEARCH_PATH /usr/lib)
+      else()
+        set(CLAMDBLAS_LIB_SEARCH_PATH /usr/lib64)
+      endif()
+    else()
+      if(CMAKE_SIZEOF_VOID_P EQUAL 4)
+        set(CLAMDBLAS_LIB_SEARCH_PATH ${CLAMDBLAS_SEARCH_PATH}\\lib32\\import)
+      else()
+        set(CLAMDBLAS_LIB_SEARCH_PATH ${CLAMDBLAS_SEARCH_PATH}\\lib64\\import)
+      endif()
+    endif()
+    find_path(CLAMDBLAS_INCLUDE_DIR
+      NAMES clAmdBlas.h
+      PATHS ${CLAMDBLAS_INCLUDE_SEARCH_PATH}
+      PATH_SUFFIXES clAmdBlas
+      NO_DEFAULT_PATH)
+    find_library(CLAMDBLAS_LIBRARY
+      NAMES clAmdBlas
+      PATHS ${CLAMDBLAS_LIB_SEARCH_PATH}
+      NO_DEFAULT_PATH)
+    if(CLAMDBLAS_LIBRARY)
+      set(CLAMDBLAS_LIBRARIES ${CLAMDBLAS_LIBRARY})
+    else()
+      set(CLAMDBLAS_LIBRARIES "")
+    endif()
+  endif()
+  # Try AMD/ATI Stream SDK
+  if (NOT OPENCL_FOUND)
+    set(ENV_AMDSTREAMSDKROOT $ENV{AMDAPPSDKROOT})
+    set(ENV_OPENCLROOT $ENV{OPENCLROOT})
+    set(ENV_CUDA_PATH $ENV{CUDA_PATH})
+    if(ENV_AMDSTREAMSDKROOT)
+      set(OPENCL_INCLUDE_SEARCH_PATH ${ENV_AMDSTREAMSDKROOT}/include)
+      if(CMAKE_SIZEOF_VOID_P EQUAL 4)
+        set(OPENCL_LIB_SEARCH_PATH ${OPENCL_LIB_SEARCH_PATH} ${ENV_AMDSTREAMSDKROOT}/lib/x86)
+      else()
+        set(OPENCL_LIB_SEARCH_PATH ${OPENCL_LIB_SEARCH_PATH} ${ENV_AMDSTREAMSDKROOT}/lib/x86_64)
+      endif()
+    elseif(ENV_CUDA_PATH AND WIN32)
+      set(OPENCL_INCLUDE_SEARCH_PATH ${ENV_CUDA_PATH}/include)
+      if(CMAKE_SIZEOF_VOID_P EQUAL 4)
+        set(OPENCL_LIB_SEARCH_PATH ${OPENCL_LIB_SEARCH_PATH} ${ENV_CUDA_PATH}/lib/Win32)
+      else()
+        set(OPENCL_LIB_SEARCH_PATH ${OPENCL_LIB_SEARCH_PATH} ${ENV_CUDA_PATH}/lib/x64)
+      endif()
+    elseif(ENV_OPENCLROOT AND UNIX)
+      set(OPENCL_INCLUDE_SEARCH_PATH ${ENV_OPENCLROOT}/inc)
+      if(CMAKE_SIZEOF_VOID_P EQUAL 4)
+        set(OPENCL_LIB_SEARCH_PATH ${OPENCL_LIB_SEARCH_PATH} /usr/lib)
+      else()
+        set(OPENCL_LIB_SEARCH_PATH ${OPENCL_LIB_SEARCH_PATH} /usr/lib64)
+      endif()
     endif()
-    # Try AMD/ATI Stream SDK
-    if (NOT OPENCL_FOUND)
-        set(ENV_AMDSTREAMSDKROOT $ENV{AMDAPPSDKROOT})
-        set(ENV_OPENCLROOT $ENV{OPENCLROOT})
-        set(ENV_CUDA_PATH $ENV{CUDA_PATH})
-        if(ENV_AMDSTREAMSDKROOT)
-            set(OPENCL_INCLUDE_SEARCH_PATH ${ENV_AMDSTREAMSDKROOT}/include)
-            if(CMAKE_SIZEOF_VOID_P EQUAL 4)
-                set(OPENCL_LIB_SEARCH_PATH ${OPENCL_LIB_SEARCH_PATH} ${ENV_AMDSTREAMSDKROOT}/lib/x86)
-            else()
-                set(OPENCL_LIB_SEARCH_PATH ${OPENCL_LIB_SEARCH_PATH} ${ENV_AMDSTREAMSDKROOT}/lib/x86_64)
-            endif()
-        elseif(ENV_CUDA_PATH AND WIN32)
-            set(OPENCL_INCLUDE_SEARCH_PATH ${ENV_CUDA_PATH}/include)
-            if(CMAKE_SIZEOF_VOID_P EQUAL 4)
-                set(OPENCL_LIB_SEARCH_PATH ${OPENCL_LIB_SEARCH_PATH} ${ENV_CUDA_PATH}/lib/Win32)
-            else()
-                set(OPENCL_LIB_SEARCH_PATH ${OPENCL_LIB_SEARCH_PATH} ${ENV_CUDA_PATH}/lib/x64)
-            endif()
-        elseif(ENV_OPENCLROOT AND UNIX)
-            set(OPENCL_INCLUDE_SEARCH_PATH ${ENV_OPENCLROOT}/inc)
-            if(CMAKE_SIZEOF_VOID_P EQUAL 4)
-                set(OPENCL_LIB_SEARCH_PATH ${OPENCL_LIB_SEARCH_PATH} /usr/lib)
-            else()
-                set(OPENCL_LIB_SEARCH_PATH ${OPENCL_LIB_SEARCH_PATH} /usr/lib64)
-            endif()
-        endif()
 
-        if(OPENCL_INCLUDE_SEARCH_PATH)
-            find_path(OPENCL_INCLUDE_DIR
-                NAMES CL/cl.h OpenCL/cl.h
-                PATHS ${OPENCL_INCLUDE_SEARCH_PATH}
-                NO_DEFAULT_PATH)
-        else()
-            find_path(OPENCL_INCLUDE_DIR
-                NAMES CL/cl.h OpenCL/cl.h)
-        endif()
+    if(OPENCL_INCLUDE_SEARCH_PATH)
+      find_path(OPENCL_INCLUDE_DIR
+        NAMES CL/cl.h OpenCL/cl.h
+        PATHS ${OPENCL_INCLUDE_SEARCH_PATH}
+        NO_DEFAULT_PATH)
+    else()
+      find_path(OPENCL_INCLUDE_DIR
+        NAMES CL/cl.h OpenCL/cl.h)
+    endif()
 
-        if(OPENCL_LIB_SEARCH_PATH)
-            find_library(OPENCL_LIBRARY NAMES OpenCL PATHS ${OPENCL_LIB_SEARCH_PATH} NO_DEFAULT_PATH)
-        else()
-            find_library(OPENCL_LIBRARY NAMES OpenCL)
-        endif()
+    if(OPENCL_LIB_SEARCH_PATH)
+      find_library(OPENCL_LIBRARY NAMES OpenCL PATHS ${OPENCL_LIB_SEARCH_PATH} NO_DEFAULT_PATH)
+    else()
+      find_library(OPENCL_LIBRARY NAMES OpenCL)
+    endif()
 
-        include(FindPackageHandleStandardArgs)
-        find_package_handle_standard_args(
-          OPENCL
-          DEFAULT_MSG
-          OPENCL_LIBRARY OPENCL_INCLUDE_DIR
-          )
+    include(FindPackageHandleStandardArgs)
+    find_package_handle_standard_args(
+      OPENCL
+      DEFAULT_MSG
+      OPENCL_LIBRARY OPENCL_INCLUDE_DIR
+      )
 
-        if(OPENCL_FOUND)
-            set(OPENCL_LIBRARIES ${OPENCL_LIBRARY})
-            set(HAVE_OPENCL 1)
-        else()
-            set(OPENCL_LIBRARIES)
-        endif()
+    if(OPENCL_FOUND)
+      set(OPENCL_LIBRARIES ${OPENCL_LIBRARY})
+      set(HAVE_OPENCL 1)
     else()
-        set(HAVE_OPENCL 1)
+      set(OPENCL_LIBRARIES)
     endif()
+  else()
+    set(HAVE_OPENCL 1)
+  endif()
 endif()