local current = "" ; local includes = ; if [ option.get "with-probing-pt" : : "yes" ] { fakelib ProbingPT : [ glob *.cpp ] ../..//headers : $(includes) $(PT-LOG) : : $(includes) ; } else { fakelib ProbingPT ; } path-constant PT-LOG : bin/pt.log ; update-if-changed $(PT-LOG) $(current) ;