Home CMake <PROJECT-NAME>_SOURCE_DIR Variable Scope
 Based on the thread "cmake variable scope, add_subdirectory", the CMake set command will set the variable in the current scope only, unless the PARENT_SCOPE parameter is specified. Recently when I was looking at the project command, per CMake doc, variables _SOURCE_DIR and _BINARY_DIR will be set. But it didn't mention what is the scope of these variables. Can these variable be used in other subdirectory? For example:  |- root | |- CMakeLists.txt // add_subdirectory(proj1); add_subdirectory(proj2) | | | |- proj1 | | |- CMakeLists.txt // project(proj1) | | | |- proj2 | | |- CMakeLists.txt // Does this have access to proj1_SOURCE_DIR or // poj1_BINARY_DIR?  What about variables for other command like Find_Package? What is the scope of the _FOUND variable? Thanks!