github.com/westcoastroms/westcoastroms-build@v0.0.0-20190928114312-2350e5a73030/build/kati/testcase/build_once.mk (about)

     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: