Gnat bind : how to ?

[dg.recrutement31@gmail.com]

Hi all,

I would like to store the files by generated gnatbind (b~###.adb,
b~###.o, ...) and indirecty by gnatmake also in a different directory
than the current working one.

I'm searching an equivalent to '-D' of gnat compile.

Is there someone knowing how to do ?
Else, what do you use to do as a workaround ?

Thanks
Didier