ERR_LIB_SYS
{ERR_PACK(ERR_LIB_SYS,0,0), "system library"},
err_load_strings(ERR_LIB_SYS, ERR_str_functs);
err_load_strings(ERR_LIB_SYS, SYS_str_reasons);
#define SYSerr(f,r) ERR_PUT_error(ERR_LIB_SYS,(f),(r),__FILE__,__LINE__)
#define SYSerror(r) ERR_PUT_error(ERR_LIB_SYS,(0xfff),(r),__FILE__,__LINE__)
#define ERR_R_SYS_LIB ERR_LIB_SYS /* 2 */
if (ERR_GET_LIB(l) == ERR_LIB_SYS)