% scons -Q BUILD_TARGETS is ['prog1'] cc -o prog1.o -c prog1.c cc -o prog1 prog1.o % scons -Q prog2 BUILD_TARGETS is ['prog2'] cc -o prog2.o -c prog2.c cc -o prog2 prog2.o % scons -Q -c . BUILD_TARGETS is ['.'] Removed prog1.o Removed prog1 Removed prog2.o Removed prog2