emerge asterisk
--- Invalid atom in /etc/portage/package.keywords: net-misc/zaptel-1.2.12
--- Invalid atom in /etc/portage/package.keywords: net-libs/libpri-1.2.4
--- Invalid atom in /etc/portage/package.keywords: net-misc/asterisk-1.2.14
--- Invalid atom in /etc/portage/package.keywords: net-misc/zaptel-1.2.12
--- Invalid atom in /etc/portage/package.keywords: net-libs/libpri-1.2.4
--- Invalid atom in /etc/portage/package.keywords: net-misc/asterisk-1.2.14
Calculating dependencies
!!! All ebuilds that could satisfy "asterisk" have been masked.
!!! One of the following masked packages is required to complete your request:
- net-misc/asterisk-1.2.13-r1 (masked by: ~ppc keyword)
- net-misc/asterisk-1.0.12 (masked by: ~ppc keyword)
- net-misc/asterisk-1.2.12.1 (masked by: ~ppc keyword)
- net-misc/asterisk-1.2.14 (masked by: ~ppc keyword)
- net-misc/asterisk-1.2.13 (masked by: ~ppc keyword)

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