https://www.jetbrains.com/help/clion/reloading-project.html

When you make changes in the CMakeLists.txt file, CLion prompts you to reload the project.
当您在 CMakeLists.txt 文件中进行更改时，CLion 会提示您重新加载项目。

There are two options for project reload:
重新加载项目有两种选择：

1. Reload changes - in this case, you reload the project once, and all the subsequent changes in CMakeLists.txt will also require reloading.
   在这种情况下，您需要重新加载项目一次，并且 CMakeLists.txt 中的所有后续更改也都需要重新加载。

2. Enable Auto-reload - this option lets CLion silently reload the project on every change in your CMakeLists.txt.
   使用此选项，CLion 可以在 CMakeLists.txt 中的每次更改时以静默方式重新加载项目。

This is similar to selecting the Automatically reload CMake project on editing checkbox in Settings / Preferences | Build, Execution, Deployment | CMake:

1. Automatically reload CMake project on editing

File -> Settings -> Build, Execution, Deployment

2. Reload a project

To reload a project manually when needed, use one of the following options:
要在需要时手动重新加载项目，请使用以下选项之一：

1. Reset Cache and Reload Project
   

2. On the main menu, choose File | Reload CMake Project or Tools | CMake | Reload CMake Project

3. In CMake tool window, click icons.
   

3. CMake tool window

View -> Tool Windows -> CMake

4. Reload CMake Project

删除 cmake-build-debug 目录，Reload CMake Project，成功更新主工程 cmake 信息。