Question

我使用了来自https://github.com/brendan-w/collector/tree/master/cmake的.cmake文件，并将它们放在与我的CMakeLists.txt相同的目录中，然后我使用了代码：

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

但是我收到了错误：

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）。您应该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 提供了一个CMake配置文件，该文件可用于帮助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)

一旦CMake找到该程序包，它将定义一些SDL2_*变量，这些变量可以在您的CMake项目中使用：

...

add_executable(MySDL2Executable main.cpp)
include_directories(MySDL2Executable PRIVATE ${SDL2_INCLUDE_DIRS})
target_link_libraries(MySDL2Executable PRIVATE ${SDL2_LIBRARIES})

请注意，这些变量名称可能会根据您的SDL2版本而有所不同。有关定义的SDL2_*变量名称的列表，请查阅CMake模块文件或软件包配置文件本身。

如何使用CMake链接SDL2？

1 个答案: