CONFIG_DEBUG_SIRFPRIMA2_UART1 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
Kernel low-level debugging messages via SiRFprimaII UART1
configname: CONFIG_DEBUG_SIRFPRIMA2_UART1
Kernel low-level debugging port
└─>Kernel low-level debugging messages via SiRFprimaII UART1
In linux kernel since version 3.1 (release Date: 2011-10-24)
Say Y here if you want the debug print routines to direct
their output to the uart1 port on SiRFprimaII devices.
their output to the uart1 port on SiRFprimaII devices.