Usage: ld-finder-outer.sh python -c 'print("hello?")'

ld-finder-outer.sh

#!/bin/bash

set -o nounset -o pipefail -o errexit

TRACE=$(mktemp)
trap "rm -f $TRACE" EXIT

EXEC=$(which "$1")
shift 1

interpreter() {
    readelf --program-headers "$1" |
        grep -o '\[Requesting program interpreter:\s\+[^]]\+\]' |
        sed 's/\[Requesting program interpreter:\s\+\([^]]\+\)]/\1/'
}

set +o errexit
strace -D -o "$TRACE" -f -e trace=%file \
    $(interpreter "$EXEC") "$EXEC" "$@"
EXIT=$?
set -o errexit

grep -o '"[^"]\+\.so[^"]*"' "$TRACE" \
    | sed 's/^"\(.*\)"/\1/' | sort -u \
    | while read f; do
    if ldd "$f" &>/dev/null; then
        echo "$f"
    fi
done
exit $EXIT