qt5(cmake): asked CMake to find a package configuration file provided by "Qt5Widgets"

CMake Warning at CMakeLists.txt:5 (FIND_PACKAGE):
  By not providing "FindQt5Widgets.cmake" in CMAKE_MODULE_PATH this project
  has asked CMake to find a package configuration file provided by
  "Qt5Widgets", but CMake did not find one.

  Could not find a package configuration file provided by "Qt5Widgets" with
  any of the following names:

    Qt5WidgetsConfig.cmake
    qt5widgets-config.cmake

  Add the installation prefix of "Qt5Widgets" to CMAKE_PREFIX_PATH or set
  "Qt5Widgets_DIR" to a directory containing one of the above files.  If
  "Qt5Widgets" provides a separate development package or SDK, be sure it has
  been installed.

solution:

include_directories(include  ${catkin_INCLUDE_DIRS})
link_directories(${catkin_LIBRARY_DIRS})

set(CMAKE_PREFIX_PATH "/home/wsh/Qt/5.4/gcc_64")

                  #set(CMAKE_CXX_FLAGS "${Qt5Widgets_EXECUTABLE_COMPILE_FLAGS} -I/home/wsh/Qt/5.4/gcc_64/include -L/home/wsh/Qt/5.4/gcc_64/lib -DQT5")
                  #SET(SYSNAME ${CMAKE_SYSTEM}-${CMAKE_SYSTEM_PROCESSOR})
SET(CMAKE_AUTOMOC ON)
SET(CMAKE_INCLUDE_CURRENT_DIR ON)
find_package(Qt5Widgets)

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