Calculating dependencies   
!!! All ebuilds that could satisfy "cross-i686-pc-linux-gnu/binutils" have been masked.
!!! One of the following masked packages is required to complete your request:
- cross-i686-pc-linux-gnu/binutils-2.17 (masked by: )
- cross-i686-pc-linux-gnu/binutils-2.15 (masked by: missing keyword)
- cross-i686-pc-linux-gnu/binutils-2.18.50.0.1 (masked by: missing keyword)
- cross-i686-pc-linux-gnu/binutils-2.18.50.0.2 (masked by: missing keyword)
- cross-i686-pc-linux-gnu/binutils-2.17-r2 (masked by: )
- cross-i686-pc-linux-gnu/binutils-2.17-r1 (masked by: )
- cross-i686-pc-linux-gnu/binutils-2.18 (masked by: )
- cross-i686-pc-linux-gnu/binutils-2.16.1-r3 (masked by: )
- cross-i686-pc-linux-gnu/binutils-2.17.50.0.17 (masked by: missing keyword)
- cross-i686-pc-linux-gnu/binutils-2.17.50.0.16 (masked by: missing keyword)
- cross-i686-pc-linux-gnu/binutils-2.17.50.0.12 (masked by: missing keyword)
- cross-i686-pc-linux-gnu/binutils-2.18-r1 (masked by: )
- cross-i686-pc-linux-gnu/binutils-2.16.91.0.6 (masked by: missing keyword)

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