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

"J. Bruce Fields" [off-list ref] writes:

If you really need a ton of build trees then you might just want to do
cp -al or something.

But be careful that this is a potentially dangerous optimization : if
you ever use a command that doesn't break hardlinks (for example
"echo foo >> file"), the modification is applied to both trees.

-- 
Matthieu