How do I manage transitive include paths in CMake for C++?

Managing transitive include paths in CMake for C++ involves ensuring that include directories are accessible not only for the target you define but also for any targets that depend on it. This way, any dependencies you include in one target can be seamlessly accessed by another target that links against it.

In CMake, you can handle transitive include directories by using the `target_include_directories()` function. You need to specify the access level of the include paths: whether they are private, public, or interface. Public includes will be accessible to both the target itself and any target that links to it. Interface includes will only be available to the targets that link against it.

Example of Transitive Include Paths in CMake

# Define a library with public include directories
add_library(my_library my_library.cpp)
target_include_directories(my_library
    PUBLIC
        include
)

# Define another library that depends on the first library
add_library(another_library another_library.cpp)
target_include_directories(another_library
    PRIVATE
        src
)

# Link the dependent library to the first one
target_link_libraries(another_library PUBLIC my_library)