Re: basics... when reading docs doesn't help

> Seems to be trivial but:
> Why don't you use "make O=/foo/bar/arch<x>-config<y>" to put output
> files into separate directories? So you can have one source tree and
> put each different kernel config and arch into a separate output
> directory.
> 
> And if you have different sources for you trees put them into branches.
> 
> When switching between branches, atime of files are updated accordingly.
> So even make should be happy with that.
> 
> Just one drawback:
> Switching back and forth between two branches will cause
> recompilation of sources that differ between that branches -
> although nothing might have changed within a branch in the meantime.