我通过 apt-get 安装了 libsdl2-image-dev，但 cmake 找不到它答案

【问题标题】：I have libsdl2-image-dev installed via apt-get, but cmake cannot find it我通过 apt-get 安装了 libsdl2-image-dev，但 cmake 找不到它
【发布时间】：2021-05-25 04:36:19
【问题描述】：

我刚刚通过 apt-get 安装了 libsdl2-image-dev，这是我的“dpkg -L libsdl2-image-dev”命令的结果：

$ dpkg -L libsdl2-image-dev
/.
/usr
/usr/share
/usr/share/doc
/usr/share/doc/libsdl2-image-dev
/usr/share/doc/libsdl2-image-dev/copyright
/usr/share/doc/libsdl2-image-dev/examples
/usr/share/doc/libsdl2-image-dev/examples/showimage.c
/usr/include
/usr/include/SDL2
/usr/include/SDL2/SDL_image.h
/usr/lib
/usr/lib/x86_64-linux-gnu
/usr/lib/x86_64-linux-gnu/libSDL2_image.a
/usr/lib/x86_64-linux-gnu/pkgconfig
/usr/lib/x86_64-linux-gnu/pkgconfig/SDL2_image.pc
/usr/share/doc/libsdl2-image-dev/changelog.Debian.gz
/usr/lib/x86_64-linux-gnu/libSDL2_image.so
/usr/lib/x86_64-linux-gnu/libSDL2_image-2.0.so

但是，cmake 中的“find_package(SDL2_IMAGE REQUIRED)”抱怨：

CMake Error at CMakeLists.txt:34 (find_package):
  By not providing "FindSDL2_IMAGE.cmake" in CMAKE_MODULE_PATH this project
  has asked CMake to find a package configuration file provided by
  "SDL2_IMAGE", but CMake did not find one.

  Could not find a package configuration file provided by "SDL2_IMAGE" with
  any of the following names:

    SDL2_IMAGEConfig.cmake
    sdl2_image-config.cmake

  Add the installation prefix of "SDL2_IMAGE" to CMAKE_PREFIX_PATH or set
  "SDL2_IMAGE_DIR" to a directory containing one of the above files.  If
  "SDL2_IMAGE" provides a separate development package or SDK, be sure it has
  been installed.


-- Configuring incomplete, errors occurred!

有人知道怎么解决吗？谢谢！

【问题讨论】：

您没有错误消息中列出的任何文件（FindSDL2_IMAGE.cmake、SDL2_IMAGEConfig.cmake 或 sdl2_image-config.cmake）。如果您关注that blog，那么它会告诉您文件FindSDL2_IMAGE.cmake，您必须创建该文件并使其可通过CMAKE_MODULE_PATH 变量进行搜索。
已解决。谢谢！

标签： cmake

【解决方案1】：

适用于 x64 LINUX

安装 sdl2 镜像库

apt install libsdl2-image-dev

在cmake configs文件夹/usr/lib/x86_64-linux-gnu/cmake/sdl2_image/sdl2_image-config.cmake创建一个文件

把它放进去

set(prefix "/usr") 
set(exec_prefix "${prefix}")
set(libdir "${prefix}/lib/x86_64-linux-gnu")
set(SDL2_IMAGE_PREFIX "/usr")
set(SDL2_IMAGE_EXEC_PREFIX "/usr")
set(SDL2_IMAGE_INCLUDE_DIRS "${prefix}/include/SDL2_image")
set(SDL2_IMAGE_LIBRARIES "-lSDL2_image")

然后添加到CMakeLists.txt关注

find_package(SDL2_image REQUIRED)
target_link_libraries(app SDL2_image)

【讨论】：