Although LINT can be compiled for test purposes, you cannot actually run a LINT kernel. I suggest first removing whatever options and hardware drivers you don't need. You can also specify flags to some device drivers. Check LINT or the driver man page for details. If config gives you errors, correct them before continuing.
Most errors are fairly self-explanatory.
If you are editing an existing kernel, rather than building one from scratch, this process will only compile changed kernel components. To get help, first check the FreeBSD FAQ and Handbook. Chances are someone has had the problem before you. Search for your particular error message in the FreeBSD-questions archive. Describe your setup completely, including your hardware setup, any error messages you receive, and software installed.