What are the different types of variables in CMake?

What are the different types of variables in CMake?

In CMake, there are several types of variables: cache variables, normal variables, and environment variables. Cache variables are stored in the CMake cache and can be modified by the user. Normal variables are local to the scope they are defined in, while environment variables are inherited from the system.

Can you explain the difference between cache variables and normal variables?

Sure! Cache variables are persistent across CMake runs and can be modified through the CMake GUI or command line. Normal variables, on the other hand, are temporary and only exist during the current CMake run.

How do I set a cache variable in my CMakeLists.txt?

You can set a cache variable using the set command with the CACHE option. For example: set(MY_VAR "value" CACHE STRING "Description of MY_VAR").

Are there any specific types of cache variables?

Yes, cache variables can be of different types such as STRING, BOOL, PATH, FILEPATH, and more, which define the expected data type.