sys-kernel/xen-sources-2.6.12.5-rN install in same dir is it correct that slotted sys-kernel/xen-sources-2.6.12.5-r1 installs everything in /usr/src/linux-2.6.12.5-xen and slotted sys-kernel/xen-sources-2.6.12.5-r2 also installs everything in the same /usr/src/linux-2.6.12.5-xen ?
Sorry, this is the way vanilla-sources -rx ebuilds do it. I'm sure they have some reasons.
If they also create the broken linux symlink, on the other hand, I can vouch their reason is not good. Please fix this because, as it is, the "package" makes maintenance even harder.
it will be fixed
fixed in 2.6.12.5-r4