* src/main.c (main): Free `infile'.

* src/scan-gram.l (handle_syncline): New.
Recognize `#line'.
* src/output.c (user_actions_output, symbol_destructors_output)
(symbol_printers_output): Use the location's file name, not
infile.
* src/reader.c (prologue_augment, epilogue_set): Likewise.

src/main.c

@@ -158,6 +158,8 @@ main (int argc, char *argv[])
   reduce_free ();
   conflicts_free ();
   grammar_free ();
+  /* FIXME: We are leaking all the other file names.  */
+  free (infile);
 
   /* The scanner memory cannot be released right after parsing, as it
      contains things such as user actions, prologue, epilogue etc.  */