Unpack the source, open the unpacked directory in Konq and CTL-F go to the second tab, it should be search in file contents, type in libc.so.6 and search subdirectories. If any file in the source specifically requires that file it should find it. If you do find it then you'll need to make a patch, if you get that far and can't figure out how to patch I'll help. (patching the source is in the tutorial, somewhere)