ref: c82cce6d95876c49116826becc116b8e20162a14
dir: /src/check_bison_ver.sh/
#!/usr/bin/env bash bison -V | awk -v major="$1" -v minor="$2" ' /^bison.*[0-9]+(\.[0-9]+)(\.[0-9]+)?$/ { match($0, /[0-9]+(\.[0-9]+)(\.[0-9]+)?$/); split(substr($0, RSTART), ver, "."); if (ver[1] == major && ver[2] >= minor) { exit 0 } else { exit 1 } }'