I use split ebuilds and kmess depends on kdenetwork-meta... I tried to merge with -O and it fails when compiling mimemessage.o, so there are some files on which it depends, as stated by bug 25268... But kdenetwork-meta should not be needed because it's against the idea of split ebuilds... right? I don't know how you can solve this problem... parhaps the file is in some of the dependencies of kdenetwork-meta, as it's a meta ebuild...
I tested this package (kmess-1.4.2) with the 3 scripts used for modular xorg and found nothing. Are you using an older version? If so, the resolution of bug #134766 is what you need (an update...) Please specify which version you're using.
No response from user.