media-libs/lcms:0 is unmaintained, has seen no releases since 2009, and (according to upstream) is affected by unspecified serious security issues. Please * either upgrade your package to use media-libs/lcms:2, * or hard-disable an optional dependency on media-libs/lcms:0, * or mask your package for removal. Thank you!
As far as I understand, media-gfs/mate-image-viewer is dead upstream and only supported up to version mate release version 1.6. In releases 1.7 - 1.9 it is not present any more. Furthermore, there is media-gfx/eom as a viable alternative (maintained in mate releases 1.1 - 1.9). So, I'd suggest to drop lcms support entirely and lastrite the package as soon as it is not maintainable any more.
mate 1.6 was obsoleted and removed from the tree. With this media-gfx/ mate-image-viewer will also be removed (not part of mate 1.8 any more)
There was a name change from mate-image-view to eom, not dead. The latter is now in the tree and supports lcms2 (https://github.com/mate-desktop/eom/commit/94214db85381f246290cfebb61de02aea2a441b3)
remoed
