make: warning: Clock skew detected. Your build may be incomplete.
is a result of the file you uncrompressed or copied from another system. its date/time is ahead of your systems (ie: you system is on 04/22/2004, and the file is on 02/01/2005)
Another possibility is that the installation process was stopped at a certain point, then rebooted. If the time changed (say, to update to the correct year) then returning to the install process, again this would happen.
Also, did you run
before all of the other make commands?
And how is your grub/lilo configured? Many problems happen from kernel panic when grub/lilo is not configured correctly to reflect your system.