cc -O2 -pipe  -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations time/getdate_err.c -o time/getdate_err -D_POSIX_C_SOURCE=202405L  -lm -lpthread 
time/getdate_err.c:10:12: error: use of undeclared identifier 'getdate_err'
        int bar = getdate_err;
                  ^
1 error generated.