cmake Variables and Properties Local Variable
Example
set(my_variable "the value is a string")
By default, a local variable is only defined in the current directory and any subdirectories added through the add_subdirectory command.
To extend the scope of a variable there are two possibilities:
-
CACHEit, which will make it globally available -
use
PARENT_SCOPE, which will make it available in the parent scope. The parent scope is either theCMakeLists.txtfile in the parent directory or caller of the current function.Technically the parent directory will be the
CMakeLists.txtfile that included the current file via theadd_subdirectorycommand.
