exe{bd}: obj{bd algorithm scope parser lexer target prerequisite rule \
  native cxx/target cxx/rule process timestamp path}

obj{bd}: cxx{bd}
obj{algorithm}: cxx{algorithm}
obj{scope}: cxx{scope}
obj{parser}: cxx{parser}
obj{lexer}: cxx{lexer}
obj{target}: cxx{target}
obj{prerequisite}: cxx{prerequisite}
obj{rule}: cxx{rule}
obj{native}: cxx{native}
obj{cxx/target}: cxx{cxx/target}
obj{cxx/rule}: cxx{cxx/rule}
obj{process}: cxx{process}
obj{timestamp}: cxx{timestamp}
obj{path}: cxx{path}