Milter-greylist

> My old make does not support parallel builds.
> Which is the configure option that I can use to disable that special build feature?
> ( Instead do the traditional sequential build. )
> 

I have to be a bit more precise.
My make does not even recognise the  "-j" flag:

make -j
make: illegal option -- j
usage: make [-CceFiNnqrstUux] [-p | -Tp] [-f makefile ]... [-k | -S] [macros=name]...  [target_name]...