#!/bin/sh
  out="$1"
  shift
  in="$@"
  
  for i in $in; do
  	eval $CPP $LINUXINCLUDE -dD -imacros "$i" -x c /dev/null
  done | \
  awk '$1 == "#define" && $2 ~ /__HYPERVISOR_[a-z][a-z_0-9]*/ { v[$3] = $2 }
  	END {   print "/* auto-generated by scripts/xen-hypercall.sh */"
  		for (i in v) if (!(v[i] in v))
  			print "HYPERCALL("substr(v[i], 14)")"}' | sort -u >$out