CONFIG_GDBSTUB_DEBUGGING is not available for thedefaultarchitecture x86.
Result is shown for architecture mn10300
Debug GDB stub by messages to serial port
configname: CONFIG_GDBSTUB_DEBUGGING
Linux Kernel Configuration
└─>Kernel hacking
└─>Debug GDB stub by messages to serial port
In linux kernel since version 2.6.25 (release Date: 2008-04-16)
This causes debugging messages to be displayed at various points
during execution of the GDB stub routines. Such messages will be
displayed on ttyS0 if that isn't the GDB stub's port, or ttySM0
otherwise.
during execution of the GDB stub routines. Such messages will be
displayed on ttyS0 if that isn't the GDB stub's port, or ttySM0
otherwise.