You ARE asking for trouble... 10:1 your entire system breaks, even if you install it properly (official .SlackBuild w/ upgradepkg)...
Let us know what happens...
Micro version bumps are even iffy IMO to upgrade. Jumping to a MAJ version... Wham!! Nothing on your system will work anymore. There's a remote chance I could be wrong, but I doubt it.
Pat has a staging area in his glibc install/upgrade's... That's the only reason why it works in the first place... You most defenately wouldn't want to removepkg on it. That would be like me cutting your head off with 6' 2 handed sword.. Only with linux, if you were resourcefull, you could bandaid your head back on after I was done but it would be annoying and time consuming...