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#!/bin/sh

(
   echo '#define VAR(name,decl) name'
   echo '#define EV_GENWRAP 1'
   cat ev_vars.h
) | cc -E -o - - | perl -ne '
   while (<>) {
      push @syms, $1 if /(^\w+)/;
   }
   print "/* DO NOT EDIT, automatically generated by update_ev_wrap */\n",
         "#ifndef EV_WRAP_H\n",
         "#define EV_WRAP_H\n",
         (map "#define $_ ((loop)->$_)\n", sort @syms),
         "#else\n",
         "#undef EV_WRAP_H\n",
         (map "#undef $_\n", sort @syms),
         "#endif\n";
' >ev_wrap.h