>>> Emerging (1 of 61) x11-libs/gtk+-2.10.9 to /
 * gtk+-2.10.9.tar.bz2 RMD160 ;-) ...                                     [ ok ]
 * gtk+-2.10.9.tar.bz2 SHA1 ;-) ...                                       [ ok ]
 * gtk+-2.10.9.tar.bz2 SHA256 ;-) ...                                     [ ok ]
 * gtk+-2.10.9.tar.bz2 size ;-) ...                                       [ ok ]
 * checking ebuild checksums ;-) ...                                      [ ok ]
 * checking auxfile checksums ;-) ...                                     [ ok ]
 * checking miscfile checksums ;-) ...                                    [ ok ]
 * checking gtk+-2.10.9.tar.bz2 ;-) ...                                   [ ok ]
 * Please re-emerge x11-libs/cairo with the X USE flag set

!!! ERROR: x11-libs/gtk+-2.10.9 failed.
Call stack:
  ebuild.sh, line 1630:   Called dyn_setup
  ebuild.sh, line 702:   Called qa_call 'pkg_setup'
  ebuild.sh, line 38:   Called pkg_setup
  gtk+-2.10.9.ebuild, line 52:   Called die

!!! cairo needs the X flag set
!!! If you need support, post the topmost build error, and the call stack if relevant.
!!! A complete build log is located at '/var/tmp/portage/x11-libs/gtk+-2.10.9/temp/build.log'.