busybox/scripts/trylink

#!/bin/sh

debug=false

function try {
    added="$1"
    shift
    $debug && echo "Trying: $* $added"
    "$@" $added >/dev/null 2>&1 \
    && exit 0
}

try "" "$@"
try "-lm" "$@"
try "-lcrypt" "$@"
try "-Wl,--start-group -lcrypt -lm -Wl,--end-group" "$@"
# It failed. Rerun & let people see the error messages
"$@" $added