-- 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 |