Re: [gentoo-user] how to get a couple of -9999 packages to behave

[Jeremi Piotrowski]

/usr/lib64/pkgconfig/atk-bridge.2.0.pc is part of at-spi2-atk which comes 
as a dependency of gtk+[X]. So you need at-spi2-atk[abi_x86_32] which 
should be pulled in by gtk+[abi_x86_32]. emerge @preserved-rebuild, make 
sure all flag changes are applied (emerge --changed-use --deep @world) and 
then try again. It could be that this is a recent change to packages you 
want (at-spi2-core/at-spi2-atk), they are live ebuilds after all, so you 
may need to report to the gnome overlay maintainers.