如何使用CMake链接SDL2？

Question

我使用了https://github.com/brendan-w/collector/tree/master/cmake中的.cmake文件，并将它们与CMakeLists.txt放在同一目录中，然后使用代码：

set(CMAKE_MODULE_PATH FindSDL2.cmake FindSDL2_image.cmake)
find_package(SDL2 REQUIRED)

但是我遇到了错误：

CMake Error at CMakeLists.txt:26 (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

  Add the installation prefix of "SDL2" to CMAKE_PREFIX_PATH or set
  "SDL2_DIR" to a directory containing one of the above files.  If "SDL2"
  provides a separate development package or SDK, be sure it has been
  installed.

Answer 1

CMAKE_MODULE_PATH变量包含CMake模块的路径列表（FindSDL2.cmake，FindSDL2_image.cmake等是您的模块）。您应将计算机上这些模块的full路径附加到此变量：

list(APPEND CMAKE_MODULE_PATH /path/to/your/SDL2/modules)
find_package(SDL2 REQUIRED)

最近，SDL2 提供 CMake配置文件，可用于帮助CMake查找您的SDL2安装。您的错误消息对此进行了明确描述，并指出了程序包配置名称（SDL2Config.cmake和sdl2-config.cmake）。要允许CMake使用此方法查找SDL2，请使用CMAKE_PREFIX_PATH：

list(APPEND CMAKE_PREFIX_PATH /path/to/your/SDL2/config/files)
find_package(SDL2 REQUIRED)