message: update make/command
diff: +ifeq ($(CMDSTAN_SUBMODULES),1)
  bin/cmdstan/%.o : src/cmdstan/%.cpp
  @mkdir -p $(dir $@)
  $(COMPILE.cpp) $(OUTPUT_OPTION) $<
  @@ -9,3 +10,4 @@ bin/print$(EXE) bin/stansummary$(EXE) bin/diagnose$(EXE) : LDLIBS_MPI =
  bin/print$(EXE) bin/stansummary$(EXE) bin/diagnose$(EXE) : bin/%$(EXE) : bin/cmdstan/%.o
  @mkdir -p $(dir $@)
  $(LINK.cpp) $^ $(LDLIBS) $(OUTPUT_OPTION)
  +endif
  \ No newline at end of file
  