Xen provides a number of build-time options which should be set as
environment variables or passed on make's command-line.
- verbose=y
- Enable debugging messages when Xen detects an
unexpected condition. Also enables console output from all domains.
- debug=y
- Enable debug assertions. Implies verbose=y.
(Primarily useful for tracing bugs in Xen).
- debugger=y
- Enable the in-Xen debugger. This can be used to
debug Xen, guest OSes, and applications.
- perfc=y
- Enable performance counters for significant events
within Xen. The counts can be reset or displayed on Xen's console
via console control keys.
