usa	2017-12-18 03:43:49 +0900 (Mon, 18 Dec 2017)

  New Revision: 61308

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=61308

  Log:
    `BASERUBY` may be not available when building from tarball
    
    * common.mk ($(REVISION_H)): revert a part of r61055 because this obstructs
      building ruby from tarball in clean (no ruby) environment.

  Modified files:
    trunk/common.mk
Index: common.mk
===================================================================
--- common.mk	(revision 61307)
+++ common.mk	(revision 61308)
@@ -994,7 +994,7 @@ $(srcdir)/revision.h: https://github.com/ruby/ruby/blob/trunk/common.mk#L994
 	@exit > $@
 
 $(REVISION_H): $(srcdir)/version.h $(srcdir)/tool/file2lastrev.rb $(REVISION_FORCE)
-	$(Q) $(BASERUBY) $(srcdir)/tool/file2lastrev.rb -q --revision.h "$(srcdir)" > revision.tmp
+	-$(Q) $(BASERUBY) $(srcdir)/tool/file2lastrev.rb -q --revision.h "$(srcdir)" > revision.tmp
 	$(Q)$(IFCHANGE) "--timestamp=$@" "$(srcdir)/revision.h" revision.tmp
 
 $(srcdir)/ext/ripper/ripper.c: $(srcdir)/parse.y id.h

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