1 # expect protoc compile/link only once. 2 test: foo 3 4 foo: foo.o bar.o 5 echo link $@ from $< 6 7 %.o: %.c FORCE_DO_CMD 8 echo compile $@ from $< 9 10 .PHONY: FORCE_DO_CMD 11 FORCE_DO_CMD: 12 13 foo.c: | protoc 14 15 foo.c: foo.proto 16 echo protoc $@ from $< 17 18 foo.proto: 19 20 bar.c: | protoc 21 22 bar.c: bar.proto 23 echo protoc $@ from $< 24 25 bar.proto: 26 27 protoc: proto.o 28 echo link $@ from $< 29 30 proto.c: 31
