Merges r27968 from ruby_1_9_2 into trunk.

--
* common.mk (capi): uses a timestamp file to get rid of
  generating twice.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29179 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Sun May 23 17:29:41 2010  Yuki Sonoda (Yugui)  <[email protected]>
+
+	* common.mk (capi): uses a timestamp file to get rid of 
+	  generating twice.
+
 Fri Jun 18 01:33:21 2010  Yuki Sonoda (Yugui)  <[email protected]>
 
 	* enc/Makefile.in (realclean): has been missing. necessary

common.mk

@@ -148,9 +148,11 @@ miniruby$(EXEEXT): config.status $(NORMALMAINOBJ) $(MINIOBJS) $(COMMONOBJS) $(DM
 GORUBY = go$(RUBY_INSTALL_NAME)
 golf: $(LIBRUBY) $(GOLFOBJS) PHONY
 	$(MAKE) $(MFLAGS) MAINOBJ="$(GOLFOBJS)" PROGRAM=$(GORUBY)$(EXEEXT) program
-capi: Doxyfile PHONY $(PREP)
+capi: doc/capi/.timestamp PHONY
+doc/capi/.timestamp: Doxyfile $(PREP) 
 	@$(MAKEDIRS) doc/capi
 	@$(DOXYGEN) -b
+	$(MINIRUBY) -e 'File.open("doc/capi/.timestamp", "w"){|f| f.puts(Time.now)}'
 
 Doxyfile: $(srcdir)/template/Doxyfile.tmpl $(PREP) $(srcdir)/tool/generic_erb.rb $(RBCONFIG)
 	$(MINIRUBY) $(srcdir)/tool/generic_erb.rb -o $@ $(srcdir)/template/Doxyfile.tmpl \