Understanding a struct in c - a uart config -

i'm looking @ config uart on mcu. there structure describing status of uart below.

at beginning of main() there line of code

uart_status_t uart_status __attribute__((unused)) = 0;

could explain line does?

thanks

it not structure enumeration. declaration sets uart_status uart_idle. gcc documentation states : [unused]means variable meant possibly unused. gcc not produce warning variable.

for gcc compiler directive, please see gcc.gnu.org/onlinedocs/gcc-3.2/gcc/variable-attributes.html

– clarasoft-it