Windows: partially restore install config generation

cmake/OpenCVGenConfig.cmake

@@ -122,8 +122,10 @@ endif()
 #  Part 3/3: ${BIN_DIR}/win-install/OpenCVConfig.cmake  -> For use within binary installers/packages
 # --------------------------------------------------------------------------------------------
 if(WIN32)
-  if(CMAKE_HOST_SYSTEM_NAME MATCHES Windows)
-    ocv_gen_config("${CMAKE_BINARY_DIR}/win-install" "${OPENCV_LIB_INSTALL_PATH}" "OpenCVConfig.root-WIN32.cmake.in")
+  if(CMAKE_HOST_SYSTEM_NAME MATCHES Windows AND NOT OPENCV_SKIP_CMAKE_ROOT_CONFIG)
+    ocv_gen_config("${CMAKE_BINARY_DIR}/win-install"
+                   "${OPENCV_INSTALL_BINARIES_PREFIX}${OPENCV_INSTALL_BINARIES_SUFFIX}"
+                   "OpenCVConfig.root-WIN32.cmake.in")
   else()
     ocv_gen_config("${CMAKE_BINARY_DIR}/win-install" "" "")
   endif()

cmake/OpenCVInstallLayout.cmake

@@ -23,15 +23,15 @@ if(ANDROID)
 elseif(WIN32 AND CMAKE_HOST_SYSTEM_NAME MATCHES Windows)
 
   if(DEFINED OpenCV_RUNTIME AND DEFINED OpenCV_ARCH)
-    set(_prefix "${OpenCV_ARCH}/${OpenCV_RUNTIME}/")
+    ocv_update(OPENCV_INSTALL_BINARIES_PREFIX "${OpenCV_ARCH}/${OpenCV_RUNTIME}/")
   else()
     message(STATUS "Can't detect runtime and/or arch")
-    set(_prefix "")
+    ocv_update(OPENCV_INSTALL_BINARIES_PREFIX "")
   endif()
   if(OpenCV_STATIC)
-    set(_suffix "staticlib")
+    ocv_update(OPENCV_INSTALL_BINARIES_SUFFIX "staticlib")
   else()
-    set(_suffix "lib")
+    ocv_update(OPENCV_INSTALL_BINARIES_SUFFIX "lib")
   endif()
   if(INSTALL_CREATE_DISTRIB)
     set(_jni_suffix "/${OpenCV_ARCH}")
@@ -39,12 +39,12 @@ elseif(WIN32 AND CMAKE_HOST_SYSTEM_NAME MATCHES Windows)
     set(_jni_suffix "")
   endif()
 
-  ocv_update(OPENCV_BIN_INSTALL_PATH           "${_prefix}bin")
+  ocv_update(OPENCV_BIN_INSTALL_PATH           "${OPENCV_INSTALL_BINARIES_PREFIX}bin")
   ocv_update(OPENCV_TEST_INSTALL_PATH          "${OPENCV_BIN_INSTALL_PATH}")
-  ocv_update(OPENCV_SAMPLES_BIN_INSTALL_PATH   "${_prefix}samples")
-  ocv_update(OPENCV_LIB_INSTALL_PATH           "${_prefix}${_suffix}")
+  ocv_update(OPENCV_SAMPLES_BIN_INSTALL_PATH   "${OPENCV_INSTALL_BINARIES_PREFIX}samples")
+  ocv_update(OPENCV_LIB_INSTALL_PATH           "${OPENCV_INSTALL_BINARIES_PREFIX}${OPENCV_INSTALL_BINARIES_SUFFIX}")
   ocv_update(OPENCV_LIB_ARCHIVE_INSTALL_PATH   "${OPENCV_LIB_INSTALL_PATH}")
-  ocv_update(OPENCV_3P_LIB_INSTALL_PATH        "${_prefix}staticlib")
+  ocv_update(OPENCV_3P_LIB_INSTALL_PATH        "${OPENCV_INSTALL_BINARIES_PREFIX}staticlib")
   ocv_update(OPENCV_CONFIG_INSTALL_PATH        ".")
   ocv_update(OPENCV_INCLUDE_INSTALL_PATH       "include")
   ocv_update(OPENCV_OTHER_INSTALL_PATH         "etc")