Removed all use of the obsolete IMMEDIATE parameter to configure_file.

It's not documented, and it does nothing unless CMake 2.0 compatibility
is enabled (and it isn't):

https://github.com/Kitware/CMake/blob/v2.6.0/Source/cmConfigureFileCommand.cxx

cmake/OpenCVExtraTargets.cmake

@@ -4,7 +4,7 @@
 CONFIGURE_FILE(
   "${OpenCV_SOURCE_DIR}/cmake/templates/cmake_uninstall.cmake.in"
   "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake"
-  IMMEDIATE @ONLY)
+  @ONLY)
 
 ADD_CUSTOM_TARGET(uninstall "${CMAKE_COMMAND}" -P "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake")
 if(ENABLE_SOLUTION_FOLDERS)

cmake/OpenCVGenAndroidMK.cmake

@@ -105,7 +105,7 @@ if(ANDROID)
   set(OPENCV_LIBS_DIR_CONFIGCMAKE "\$(OPENCV_THIS_DIR)/lib/\$(OPENCV_TARGET_ARCH_ABI)")
   set(OPENCV_3RDPARTY_LIBS_DIR_CONFIGCMAKE "\$(OPENCV_THIS_DIR)/3rdparty/lib/\$(OPENCV_TARGET_ARCH_ABI)")
 
-  configure_file("${OpenCV_SOURCE_DIR}/cmake/templates/OpenCV.mk.in" "${CMAKE_BINARY_DIR}/OpenCV.mk" IMMEDIATE @ONLY)
+  configure_file("${OpenCV_SOURCE_DIR}/cmake/templates/OpenCV.mk.in" "${CMAKE_BINARY_DIR}/OpenCV.mk" @ONLY)
 
   # -------------------------------------------------------------------------------------------
   #  Part 2/2: ${BIN_DIR}/unix-install/OpenCV.mk -> For use with "make install"
@@ -115,6 +115,6 @@ if(ANDROID)
   set(OPENCV_LIBS_DIR_CONFIGCMAKE "\$(OPENCV_THIS_DIR)/../libs/\$(OPENCV_TARGET_ARCH_ABI)")
   set(OPENCV_3RDPARTY_LIBS_DIR_CONFIGCMAKE "\$(OPENCV_THIS_DIR)/../3rdparty/libs/\$(OPENCV_TARGET_ARCH_ABI)")
 
-  configure_file("${OpenCV_SOURCE_DIR}/cmake/templates/OpenCV.mk.in" "${CMAKE_BINARY_DIR}/unix-install/OpenCV.mk" IMMEDIATE @ONLY)
+  configure_file("${OpenCV_SOURCE_DIR}/cmake/templates/OpenCV.mk.in" "${CMAKE_BINARY_DIR}/unix-install/OpenCV.mk" @ONLY)
   install(FILES ${CMAKE_BINARY_DIR}/unix-install/OpenCV.mk DESTINATION ${OPENCV_CONFIG_INSTALL_PATH} COMPONENT dev)
 endif(ANDROID)

cmake/OpenCVGenConfig.cmake

@@ -83,9 +83,9 @@ endif()
 
 export(TARGETS ${OpenCVModules_TARGETS} FILE "${CMAKE_BINARY_DIR}/OpenCVModules${modules_file_suffix}.cmake")
 
-configure_file("${OpenCV_SOURCE_DIR}/cmake/templates/OpenCVConfig.cmake.in" "${CMAKE_BINARY_DIR}/OpenCVConfig.cmake" IMMEDIATE @ONLY)
+configure_file("${OpenCV_SOURCE_DIR}/cmake/templates/OpenCVConfig.cmake.in" "${CMAKE_BINARY_DIR}/OpenCVConfig.cmake" @ONLY)
 #support for version checking when finding opencv. find_package(OpenCV 2.3.1 EXACT) should now work.
-configure_file("${OpenCV_SOURCE_DIR}/cmake/templates/OpenCVConfig-version.cmake.in" "${CMAKE_BINARY_DIR}/OpenCVConfig-version.cmake" IMMEDIATE @ONLY)
+configure_file("${OpenCV_SOURCE_DIR}/cmake/templates/OpenCVConfig-version.cmake.in" "${CMAKE_BINARY_DIR}/OpenCVConfig-version.cmake" @ONLY)
 
 # --------------------------------------------------------------------------------------------
 #  Part 2/3: ${BIN_DIR}/unix-install/OpenCVConfig.cmake -> For use *with* "make install"
@@ -98,8 +98,8 @@ if(INSTALL_TO_MANGLED_PATHS)
   set(OpenCV_3RDPARTY_LIB_DIRS_CONFIGCMAKE "\"\${OpenCV_INSTALL_PATH}/${OpenCV_3RDPARTY_LIB_DIRS_CONFIGCMAKE}\"")
 endif()
 
-configure_file("${OpenCV_SOURCE_DIR}/cmake/templates/OpenCVConfig.cmake.in" "${CMAKE_BINARY_DIR}/unix-install/OpenCVConfig.cmake" IMMEDIATE @ONLY)
-configure_file("${OpenCV_SOURCE_DIR}/cmake/templates/OpenCVConfig-version.cmake.in" "${CMAKE_BINARY_DIR}/unix-install/OpenCVConfig-version.cmake" IMMEDIATE @ONLY)
+configure_file("${OpenCV_SOURCE_DIR}/cmake/templates/OpenCVConfig.cmake.in" "${CMAKE_BINARY_DIR}/unix-install/OpenCVConfig.cmake" @ONLY)
+configure_file("${OpenCV_SOURCE_DIR}/cmake/templates/OpenCVConfig-version.cmake.in" "${CMAKE_BINARY_DIR}/unix-install/OpenCVConfig-version.cmake" @ONLY)
 
 if(UNIX) # ANDROID configuration is created here also
   #http://www.vtk.org/Wiki/CMake/Tutorials/Packaging reference
@@ -131,8 +131,8 @@ if(WIN32)
   set(OpenCV2_INCLUDE_DIRS_CONFIGCMAKE "\"\"")
 
   exec_program(mkdir ARGS "-p \"${CMAKE_BINARY_DIR}/win-install/\"" OUTPUT_VARIABLE RET_VAL)
-  configure_file("${OpenCV_SOURCE_DIR}/cmake/templates/OpenCVConfig.cmake.in" "${CMAKE_BINARY_DIR}/win-install/OpenCVConfig.cmake" IMMEDIATE @ONLY)
-  configure_file("${OpenCV_SOURCE_DIR}/cmake/templates/OpenCVConfig-version.cmake.in" "${CMAKE_BINARY_DIR}/win-install/OpenCVConfig-version.cmake" IMMEDIATE @ONLY)
+  configure_file("${OpenCV_SOURCE_DIR}/cmake/templates/OpenCVConfig.cmake.in" "${CMAKE_BINARY_DIR}/win-install/OpenCVConfig.cmake" @ONLY)
+  configure_file("${OpenCV_SOURCE_DIR}/cmake/templates/OpenCVConfig-version.cmake.in" "${CMAKE_BINARY_DIR}/win-install/OpenCVConfig-version.cmake" @ONLY)
   if(BUILD_SHARED_LIBS)
     install(FILES "${CMAKE_BINARY_DIR}/win-install/OpenCVConfig.cmake" DESTINATION "${OpenCV_INSTALL_BINARIES_PREFIX}lib" COMPONENT dev)
     install(EXPORT OpenCVModules DESTINATION "${OpenCV_INSTALL_BINARIES_PREFIX}lib" FILE OpenCVModules${modules_file_suffix}.cmake COMPONENT dev)

cmake/OpenCVGenPkgconfig.cmake

@@ -78,7 +78,7 @@ else()
 endif()
 configure_file("${OpenCV_SOURCE_DIR}/cmake/templates/opencv-XXX.pc.in"
                "${CMAKE_BINARY_DIR}/unix-install/${OPENCV_PC_FILE_NAME}"
-               @ONLY IMMEDIATE)
+               @ONLY)
 
 if(UNIX AND NOT ANDROID)
   install(FILES ${CMAKE_BINARY_DIR}/unix-install/${OPENCV_PC_FILE_NAME} DESTINATION ${OPENCV_LIB_INSTALL_PATH}/pkgconfig COMPONENT dev)

modules/java/CMakeLists.txt

@@ -266,7 +266,7 @@ if(ANDROID)
 else(ANDROID)
   set(JAR_NAME opencv-${LIB_NAME_SUFIX}.jar)
   set(JAR_FILE "${OpenCV_BINARY_DIR}/bin/${JAR_NAME}")
-  configure_file("${CMAKE_CURRENT_SOURCE_DIR}/build.xml.in" "${OpenCV_BINARY_DIR}/build.xml" IMMEDIATE @ONLY)
+  configure_file("${CMAKE_CURRENT_SOURCE_DIR}/build.xml.in" "${OpenCV_BINARY_DIR}/build.xml" @ONLY)
   list(APPEND step3_depends "${OpenCV_BINARY_DIR}/build.xml")
 
   add_custom_command(OUTPUT "${JAR_FILE}" "${JAR_FILE}.dephelper"