2010-07-12  Joern Rennecke  <joern.rennecke@embecosm.com>

	PR rtl-optimization/44752
	* genautomata.c (main): Don't emit an empty file even if there
	is no automaton.

Index: genautomata.c
===================================================================
--- genautomata.c	(revision 162035)
+++ genautomata.c	(working copy)
@@ -9568,6 +9568,14 @@ main (int argc, char **argv)
 	  write_automata ();
 	}
     }
+  else
+    puts ("/* Generated automatically by the program `genautomata'\n"
+	  "   from the machine description file `md'.  */\n\n"
+	  "/* There is no automaton, but ISO C forbids empty\n"
+	  "   translation units, so include a header file with some\n"
+	  "   declarations, and the its pre-requisite header file.  */\n"
+	  "#include \"config.h\"\n"
+	  "#include \"system.h\"\n");
 
   fflush (stdout);
   return (ferror (stdout) != 0 || have_error