nobu	2018-02-08 16:49:41 +0900 (Thu, 08 Feb 2018)

  New Revision: 62304

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=62304

  Log:
    common.mk: add dependencies and timestamp

  Modified files:
    trunk/common.mk
Index: common.mk
===================================================================
--- common.mk	(revision 62303)
+++ common.mk	(revision 62304)
@@ -207,13 +207,16 @@ main: $(SHOWFLAGS) exts $(ENCSTATIC:stat https://github.com/ruby/ruby/blob/trunk/common.mk#L207
 	@$(NULLCMD)
 
 .PHONY: mjit-headers
-mjit-headers: $(MJIT_MIN_HEADER)
+mjit-headers: $(TIMESTAMPDIR)/$(MJIT_HEADER:.h=)$(MJIT_HEADER_SUFFIX).time $(MJIT_MIN_HEADER)
 
-$(MJIT_HEADER:.h=)$(MJIT_HEADER_SUFFIX).h: PHONY probes.h
-	$(ECHO) building $@
-	$(Q) $(CPP) $(MJIT_HEADER_FLAGS) $(CFLAGS) $(XCFLAGS) $(CPPFLAGS) -DMJIT_HEADER $(srcdir)/vm.c $(CPPOUTFLAG)$(@F).new
-	$(Q) $(IFCHANGE) $@ $(@F).new
+$(TIMESTAMPDIR)/$(MJIT_HEADER:.h=)$(MJIT_HEADER_SUFFIX).time: probes.h vm.$(OBJEXT)
+	$(ECHO) building $(@F:.time=.h)
+	$(Q) $(CPP) $(MJIT_HEADER_FLAGS) $(CFLAGS) $(XCFLAGS) $(CPPFLAGS) -DMJIT_HEADER $(srcdir)/vm.c $(CPPOUTFLAG)$(@F:.time=.h).new
+	$(Q) $(IFCHANGE) "--timestamp=$@" $(@F:.time=.h) $(@F:.time=.h).new
+
+$(MJIT_HEADER:.h=)$(MJIT_HEADER_SUFFIX).h: $(TIMESTAMPDIR)/$(MJIT_HEADER:.h=)$(MJIT_HEADER_SUFFIX).time
 
+$(MJIT_MIN_HEADER:.h=)$(MJIT_HEADER_SUFFIX).h: $(TIMESTAMPDIR)/$(MJIT_HEADER:.h=)$(MJIT_HEADER_SUFFIX).time
 $(MJIT_MIN_HEADER:.h=)$(MJIT_HEADER_SUFFIX).h: $(srcdir)/tool/transform_mjit_header.rb $(PREP)
 $(MJIT_MIN_HEADER:.h=)$(MJIT_HEADER_SUFFIX).h: $(MJIT_HEADER:.h=)$(MJIT_HEADER_SUFFIX).h
 	$(ECHO) building $@

--
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