What are USE-flags? The ideas behind USE-flags    To help users
in deciding what to install/activate and what not, we wanted the
user to specify his/her environment in an easy way. This forces
the user into deciding what he/she really wants and eases the
process for Portage, our package managment system, to make
useful decisions.  Definition of a USE-flag     What USE-flags
exist?     gtkhtml - Adds support for gnome-extra/gtkhtml imap
- Adds support for IMAP Using USE-flags Declare permanent USE-
flags   As previously mentioned, all USE-flags are declared
inside the USE variable. To make it easy for users to search and
pick USE-flags, we already provide a default USE setting. This
setting is a collection of USE-flags we think are commonly used
by the Gentoo users. This default setting is declared in the
/etc/make.profile/make.defaults file. Let us take a look at this
default setting:  USE="x86 oss apm arts avi berkdb crypt cups
encode foomaticdb gdbm gif gpm gtk       imlib jpeg kde gnome
libg++ libwww mad