I performed an emerge -uD world today, which updated grep from 2.5.1-r1 to 2.5.1-r2 and installed libpcre-4.4 as a dependency (the perl useflag is new in grep-2.5.1-r2, it's not in the 2.5.1-r1 ebuild).
This led to a failure in calculating module dependencies on boot.
I just downgraded to grep-2.5.1-r1, unmerged libpcre, and everything seems to be fine again.
Ok, I just reemerged latest grep-2.5.1-r2 with USE="-perl" and everything is still working fine, no error messages on boot, so it has to be a problem related to libpcre-4.4.
Just hit the same problem and then also downgraded grep. After that it worked again. I think it is a dependency problem.. localmount -> runscript.sh -> grep and grep is dynamically linked to /usr/lib/libpcre.so.0 So in case your /usr is on a partition of its own, you are in trouble..
yep. comment #2 is right on. I've modified the ebuild to link it statically
if you have USE="perl" which should fix this.
Resync and try it again please.
Actually, -r4 is better.
I indeed have /usr on a separate partition, and 2.5.1-r4 fixed it, I just emerged it, unmerged libpcre and did a reboot, now everything is fine again.