gentoo-box ~ # emerge --pretend pidgin

These are the packages that would be merged, in order:

Calculating dependencies \
!!! All ebuilds that could satisfy "pidgin" have been masked.
!!! One of the following masked packages is required to complete your request:
- net-im/pidgin-2.0.2 (masked by: ~x86 keyword)
- net-im/pidgin-2.0.0 (masked by: ~x86 keyword)
- net-im/pidgin-2.0.1 (masked by: ~x86 keyword)

For more information, see MASKED PACKAGES section in the emerge man page or 
refer to the Gentoo Handbook.

gentoo-box ~ #