As you may have noticed already, there are interesting updates in the Slackware ChangeLog.txt !
A new kernel, and new glibc plus gcc packages means there has to be an updated set of multilib packages too or else you bunch of hybrid lovers would be left out in the cold.
Well actually there is an update to my multilib packages too! . The http://slackware.com/~alien/multilib/current/ is a new directory with goodies for your consumption.
For installation/upgrade instructions see the multilib README or even better, read my Wiki article at http://alien.slackbook.org/dokuwiki/doku.php?id=slackware:multilib (which has not yet been updated with package versions for slackware64-current, but that will change soon).
In the slackware64-compat32 subdirectory I added the set of packages which have been generated by the massconvert32.sh script, i.e. that directory contains all the support libraries you need (along with my gcc/glibc and compat32-tools packages) to turn your Slackware64-current into a multilib system.
Good luck! Eric
Rsync access offered through rsync://taper.alienbase.nl/mirrors/people/alien/multilib/current/