nobu	2018-11-29 16:45:54 +0900 (Thu, 29 Nov 2018)

  New Revision: 66090

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=66090

  Log:
    Create empty revision.h when srcdir is write-only [ci skip]

  Modified files:
    trunk/common.mk
Index: common.mk
===================================================================
--- common.mk	(revision 66089)
+++ common.mk	(revision 66090)
@@ -1083,7 +1083,8 @@ preludes: {$(VPATH)}miniprelude.c https://github.com/ruby/ruby/blob/trunk/common.mk#L1083
 preludes: {$(srcdir)}golf_prelude.c
 
 $(srcdir)/revision.h:
-	$(Q)$(gnumake:yes=#) exit > $@
+	$(Q)$(gnumake:yes=#) $(RM) $(@F)
+	$(Q)$(gnumake:yes=#) exit > $@ || exit > $(@F)
 
 $(REVISION_H): $(srcdir)/version.h $(srcdir)/tool/file2lastrev.rb $(REVISION_FORCE)
 	-$(Q) $(BASERUBY) $(srcdir)/tool/file2lastrev.rb -q --revision.h "$(srcdir)" > revision.tmp

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