CMake Deprecation Warning at CMakeLists.txt:27 (cmake_minimum_required): Compatibility with CMake < 2.8.12 will be removed from a future version of CMake. Update the VERSION argument <min> value or use a ...<max> suffix to tell CMake that the project does not need compatibility with older versions. -- Detected nanomsg ABI v5.0.0 CMake Warning at CMakeLists.txt:242 (message): Could not find asciidoctor: skipping docs

这是一个CMake的警告和提示信息，它告诉你的是CMakeLists.txt文件中的cmake_minimum_required指令需要更新版本，因为将来的CMake版本将不再支持旧版本的兼容性。另外，它还提示当前的CMake版本检测到了nanomsg ABI v5.0.0，以及找不到asciidoctor，因此跳过文档生成。建议你更新CMake的版本，并安装asciidoctor以便生成文档。

相关问题

-- cmake version 3.22.1 CMake Deprecation Warning at CMakeLists.txt:4 (cmake_minimum_required): Compatibility with CMake < 2.8.12 will be removed from a future version of CMake. Update the VERSION argument <min> value or use a ...<max> suffix to te

ll CMake the minimum required version for your project. For example, if you want to set the minimum required version to 3.22.1, you can modify your `CMakeLists.txt` file as follows:

cmake_minimum_required(VERSION 3.22.1)

By specifying the minimum required version, you ensure that your project is compatible with that version or any higher versions of CMake. This warning is to inform you that compatibility with CMake versions older than 2.8.12 will be removed in the future.

CMake Deprecation Warning at CMakeLists.txt:1 (cmake_minimum_required): Compatibility with CMake < 2.8.12 will be removed from a future version of CMake. Update the VERSION argument <min> value or use a ...<max> suffix to tell CMake that the project does not need compatibility with older versions.

这个警告是因为你的`CMakeLists.txt`文件中设置了`cmake_minimum_required`的版本过低，建议将其更新至CMake 2.8.12或更高版本，以避免兼容性问题。你可以将`cmake_minimum_required`设置为如下所示的语句：

cmake_minimum_required(VERSION 2.8.12 FATAL_ERROR)

这样可以明确告诉CMake，你的项目需要的最低版本是2.8.12，如果使用低于此版本的CMake编译，则会出现错误。如果你确定你的项目不需要向下兼容旧版本的CMake，可以将`cmake_minimum_required`替换为如下所示的语句：

cmake_minimum_required(VERSION 3.0 FATAL_ERROR)

这样可以确保你的项目不会与CMake 3.0以下的版本兼容。更新后，再次编译项目即可。