- -- var='1' before my_add_subdirectory
- -- var='2' in my_add_subdirectory before add_subdirectory
- -- var='2' in subdirectory before set
- -- var='3' in subdirectory after set
- -- var_sub='' in subdirectory after set PARENT_SCOPE
- -- var='2' in my_add_subdirectory after add_subdirectory
- -- var_sub='sub' in my_add_subdirectory after add_subdirectory
- -- var='1' after my_add_subdirectory
- -- var_sub='' after my_add_subdirectory
- -- var='3' taken from subdirectory
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