...
----------------------------------------------------------------------
Ran 3 tests in 0.000s

OK
build foo.o: compile_one foo.cc
  compiler = cxx
  variant = dbg
  more_cxx_flags = ''

build _build/obj/cxx-dbg/mycpp/a.o: compile_one mycpp/a.cc
  compiler = cxx
  variant = dbg
  more_cxx_flags = ''

build _build/obj/cxx-dbg/mycpp/b.o: compile_one mycpp/b.cc
  compiler = cxx
  variant = dbg
  more_cxx_flags = ''

build _build/obj/cxx-opt/mycpp/a.o: compile_one mycpp/a.cc
  compiler = cxx
  variant = opt
  more_cxx_flags = ''

build _build/obj/cxx-opt/mycpp/b.o: compile_one mycpp/b.cc
  compiler = cxx
  variant = opt
  more_cxx_flags = ''

build _build/obj/cxx-dbg/mycpp/z.o: compile_one mycpp/z.cc
  compiler = cxx
  variant = dbg
  more_cxx_flags = ''

build _build/obj/cxx-opt/mycpp/z.o: compile_one mycpp/z.cc
  compiler = cxx
  variant = opt
  more_cxx_flags = ''

build _build/obj/cxx-dbg/mycpp/a_test.o: compile_one mycpp/a_test.cc
  compiler = cxx
  variant = dbg
  more_cxx_flags = ''

build _bin/cxx-dbg/mycpp/a_test: link _build/obj/cxx-dbg/mycpp/a_test.o
  compiler = cxx
  variant = dbg

build _build/obj/cxx-opt/mycpp/a_test.o: compile_one mycpp/a_test.cc
  compiler = cxx
  variant = opt
  more_cxx_flags = ''

build _bin/cxx-opt/mycpp/a_test: link _build/obj/cxx-opt/mycpp/a_test.o
  compiler = cxx
  variant = opt

build _gen/mycpp/examples/foo.asdl.cc _gen/mycpp/examples/foo.asdl.h $
    _gen/mycpp/examples/foo.asdl_debug.py: asdl-cpp mycpp/examples/foo.asdl $
    | _bin/shwrap/asdl_main
  action = cpp
  out_prefix = _gen/mycpp/examples/foo.asdl
  asdl_flags = 
  debug_mod = _gen/mycpp/examples/foo.asdl_debug.py