/usr/local question

[Jeremy Lavergne]

> "/usr/local is not a viable choice because some software
> (especially auto* tools from Gnu) look in /usr/local
> as a default location, which means MacPorts can't be
> easily isolated when needed."
> 
> I want to kindly ask the person who wrote this to elaborate,
> and be as specific as can be: what exactly does it mean for macports
> to be "isolated", and how exactly does e.g. auto* looking into
> /usr/local stand in the way of it?

As with the software that magically found its way into /usr/local, how do we stop that very same software from clobbering what MacPorts has installed there?

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