#!/usr/bin/env bash
#
# Copyright (C) 2012 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
SELF=${0##*/}

READELF="${READELF:-readelf}"
TARGETS=$*
XARGS="${XARGS:-xargs -r}"

[ -z "$TARGETS" ] && {
  echo "$SELF: no directories / files specified"
  echo "usage: $SELF [PATH...]"
  exit 1
}

find $TARGETS -type f -a -exec file {} \; | \
  sed -n -e 's/^\(.*\):.*ELF.*\(executable\|shared object\).*,.* stripped/\1/p' | \
  $XARGS -n1 $READELF -d | \
  awk '$2 ~ /NEEDED/ && $NF !~ /interpreter/ && $NF ~ /^\[?lib.*\.so/ { gsub(/[\[\]]/, "", $NF); print $NF }' | \
  sort -u
