PostBuild Qt5

#POSTBUILD STEPS
#------------------------------------------------------------------------------
# Add install rules for required system runtimes such as MSVCRxx.dll
SET (CMAKE_INSTALL_SYSTEM_RUNTIME_LIBS_SKIP ON)
SET (CMAKE_INSTALL_DEBUG_LIBRARIES ON)
INCLUDE(InstallRequiredSystemLibraries)
IF (CMAKE_INSTALL_SYSTEM_RUNTIME_LIBS)
  INSTALL(FILES ${CMAKE_INSTALL_SYSTEM_RUNTIME_LIBS}
    DESTINATION .
    PERMISSIONS OWNER_WRITE OWNER_READ OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ
    COMPONENT Runtime)

ENDIF (CMAKE_INSTALL_SYSTEM_RUNTIME_LIBS)

set(_extension)
set(_dir ".")
IF(WIN32)
  set(_extension ".exe")
  set(_dir ".")
ENDIF(WIN32)
SET_TARGET_PROPERTIES( ${PROJECT_NAME}
        PROPERTIES
        DEBUG_OUTPUT_NAME ${PROJECT_NAME}${EXE_DEBUG_EXTENSION}
        RELEASE_OUTPUT_NAME ${PROJECT_NAME}
)
INSTALL(TARGETS ${PROJECT_NAME}
    COMPONENT Applications
    RUNTIME DESTINATION .
    LIBRARY DESTINATION .
    ARCHIVE DESTINATION .
    BUNDLE DESTINATION .
)

#installing qwindows.dll in platform
# Get Qt5Widgets library and cut off the library name
get_target_property(QT5_WIDGETSLIBRARY Qt5::Widgets LOCATION)
get_filename_component(QT5_WIDGETSLIBRARYPATH ${QT5_WIDGETSLIBRARY} PATH)

INSTALL(FILES ${QT5_WIDGETSLIBRARYPATH}/../plugins/platforms/qwindows.dll ${QT5_WIDGETSLIBRARYPATH}/../plugins/platforms/qminimal.dll
    DESTINATION ./platforms
    PERMISSIONS OWNER_WRITE OWNER_READ OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ
    COMPONENT Runtime)

list(APPEND libSearchDirs
    ${QT5_WIDGETSLIBRARYPATH}../bin
    ${QT5_WIDGETSLIBRARYPATH}
    ${OpenCV_BINARY_DIR}
    ${OpenCV_LIBRARY_DIR}
    ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}
    ${CMAKE_BINARY_DIR}/bin
    ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/Debug
    ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/Release )

set(APPS "\${CMAKE_INSTALL_PREFIX}/${_dir}/${PROJECT_NAME}${EXE_DEBUG_EXTENSION}${_extension}")
# paths to executables

INSTALL(CODE "
   include(\"${CMAKE_ROOT}/Modules/BundleUtilities.cmake\")
   fixup_bundle(\"${APPS}\"   \"\"   \"${libSearchDirs}\")
   " COMPONENT Applications)