doing `emerge --info <pkg>` should run the pkg_info() function in the installed ebuild in vdb ... purpose is to query specific information about a package that only that package would be able to glean for example, sys-libs/glibc would have a function like: pkg_info() { /lib/libc.so.6 }
This is implemented in svn r7202.
This has been released in 2.1.3_rc7.