#!/bin/sh [ $# -lt 4 -o -z "$1" -o -z "$2" -o -z "$3" -o -z "$4" ] && { echo "Usage: $0 <cross> <reference> <pic .a> <destination>" exit 1 } cross="$1"; shift ref="$1"; shift pic="$1"; shift dest="$1"; shift SYMBOLS="$(${cross}nm "$ref" | grep -E '........ [TW] ' | awk '$3 {printf "-u%s ", $3}')" set -x ${cross}gcc -nostdlib -nostartfiles -shared -Wl,--gc-sections -o "$dest" $SYMBOLS "$pic" "$@"