remove dafault flags to avoid confliction

glog.go

@@ -396,21 +396,20 @@ type flushSyncWriter interface {
 }
 
 func init() {
-	flag.BoolVar(&logging.toStderr, "logtostderr", false, "log to standard error instead of files")
-	flag.BoolVar(&logging.alsoToStderr, "alsologtostderr", false, "log to standard error as well as files")
-	flag.Var(&logging.verbosity, "v", "log level for V logs")
-	flag.Var(&logging.stderrThreshold, "stderrthreshold", "logs at or above this threshold go to stderr")
-	flag.Var(&logging.vmodule, "vmodule", "comma-separated list of pattern=N settings for file-filtered logging")
-	flag.Var(&logging.traceLocation, "log_backtrace_at", "when logging hits line file:N, emit a stack trace")
 	logging.flag = flag.CommandLine
-
 	// Default stderrThreshold is ERROR.
 	logging.stderrThreshold = errorLog
+	logging.alsoToStderr = true
 
 	logging.setVState(0, nil, false)
 	go logging.flushDaemon()
 }
 
+func SetFlags(verbosity Level, stderrThres int32) {
+	logging.verbosity = verbosity
+	logging.stderrThreshold = severity(stderrThres)
+}
+
 func InitWithFlag(f *flag.FlagSet) {
 	if f == nil {
 		os.Stderr.Write([]byte("ERROR: init with nil flagset"))