Linux preempt-rt

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#!/bin/sh
# Make busybox links list file.

CONFIG_H=${1:-Config.h}
APPLETS_H=${2:-applets.h}
gcc -E -DMAKE_LINKS -include $CONFIG_H $APPLETS_H |
  awk '/^[ \t]*LINK/{
	match($2,"_BB_DIR[A-Z_]*")
	dir=substr($2,RSTART+7,RLENGTH-7)
	gsub("_","/",dir)
	if(dir=="/ROOT") dir=""
	file=$3
	gsub("\"","",file)
	if (file=="busybox") next
	print tolower(dir) "/" file
  }'