默认输出到/tmp/<program name>.<hostname>.<user name>.log.<severity level>.<date>.<time>.<pid>
/tmp/<program name>.<hostname>.<user name>.log.<severity level>.<date>.<time>.<pid>
FATAL和CHECK失败,会打印堆栈(默认打印到stderr),然后exit(1)
minloglevel=NUM
指定最小级别
重定向到标准出错
GLOG_logtostderr=1 ./your_application