#! /usr/bin/env bash 

MAXINT="$(${OCAML:-ocaml} <(echo print_int max_int))"

case "${MAXINT}" in
    4611686018427387903)
        echo 64;;
    1073741823)
        echo 32;;
    *)
        echo "$0": Unknown value for max_int \("${MAXINT}"\). >&2
        exit 1
esac