Mark Hobley wrote:
> In Gentoo:
>
> In the make.conf configuration file, is there a way to disable all USE
> flags by default, for example by using a wildcard, then explicitly set the
> ones that I want?
>
> For example, all flags disabled, except the foo and bar flags:
>
> USE="-* foo bar"

As far as I know, no.


> Is it possible to have more than one USE= line in the
> /etc/make.conf file?
>
> For example:
>
> USE="foo"
> USE="bar"

Yes, you can have multiple, but not in the way you suggest, the method
would imply that the last USE line would be used and all the previous
ones would be "ignored". This is how it's done:

USE="line one \
line two \
line three"


--

//Aho