Cygwin can't find the command -j4 --map on windows10

I followed the steps on the web,but I met a problem when i input the command -j4 --map, it tell me the command can’t find. Can anyone help me? Please advise.

I find a problem same to me on the web, but it seem doesn’t work for me.

I’m pretty sure you’ll have to preface the command with ‘./’; i.e. ‘./’ if it’s in your current directory. If not you’ll need the full path.

You inspire me. The real problem is that my ardupilot version is 3.3.3, so I should input --map rather than -j4 --map.