CMake Error at CMakeLists.txt:227 (find_package):

  By not providing "FindSDL2.cmake" in CMAKE_MODULE_PATH this project has

  asked CMake to find a package configuration file provided by "SDL2", but

  CMake did not find one.

  Could not find a package configuration file provided by "SDL2" with any of

  the following names:

    SDL2Config.cmake

    sdl2-config.cmake

z

这是缺失了什么依赖么还是？