diff --git a/configure.ac b/configure.ac
index 69711b7..9b77c07 100644
--- a/configure.ac
+++ b/configure.ac
@@ -127,27 +127,9 @@ if test x"$acx_pthread_ok" = x"yes"; then
   AC_CHECK_LIB(pthread, pthread_self)
 fi
 
-# Check if there is google-gflags library installed.
-SAVE_CFLAGS="$CFLAGS"
-SAVE_LIBS="$LIBS"
-AC_ARG_WITH(gflags, AS_HELP_STRING[--with-gflags=GFLAGS_DIR],
-  GFLAGS_CFLAGS="-I${with_gflags}/include"
-  GFLAGS_LIBS="-L${with_gflags}/lib -lgflags"
-  CFLAGS="$CFLAGS $GFLAGS_CFLAGS"
-  LIBS="$LIBS $GFLAGS_LIBS"
-)
-AC_CHECK_LIB(gflags, main, ac_cv_have_libgflags=1, ac_cv_have_libgflags=0)
-if test x"$ac_cv_have_libgflags" = x"1"; then
-  AC_DEFINE(HAVE_LIB_GFLAGS, 1, [define if you have google gflags library])
-  if test x"$GFLAGS_LIBS" = x""; then
-    GFLAGS_LIBS="-lgflags"
-  fi
-else
-  GFLAGS_CFLAGS=
-  GFLAGS_LIBS=
-fi
-CFLAGS="$SAVE_CFLAGS"
-LIBS="$SAVE_LIBS"
+GFLAGS_CFLAGS=
+GFLAGS_LIBS=
+ac_cv_have_libgflags=0
 
 # TODO(hamaji): Use official m4 macros provided by testing libraries
 #               once the m4 macro of Google Mocking becomes ready.
diff --git a/src/glog/stl_logging.h.in b/src/glog/stl_logging.h.in
index 600945d..bd935d5 100644
--- a/src/glog/stl_logging.h.in
+++ b/src/glog/stl_logging.h.in
@@ -59,6 +59,13 @@
 #include <utility>
 #include <vector>
 
+#if defined (__GNUC__) && !defined(_LIBCPP_VERSION)
+# define GLOG_STL_LOGGING_FOR_EXT_HASH
+# define GLOG_STL_LOGGING_FOR_EXT_SLIST
+#elif defined(_LIBCPP_VERSION)
+# define GLOG_STL_LOGGING_FOR_UNORDERED
+#endif
+
 #ifdef GLOG_STL_LOGGING_FOR_UNORDERED
 # include <unordered_map>
 # include <unordered_set>
diff --git a/src/glog/logging.h.in b/src/glog/logging.h.in
index 9968b96..ee0dc82 100644
--- a/src/glog/logging.h.in
+++ b/src/glog/logging.h.in
@@ -1423,6 +1423,16 @@ class GOOGLE_GLOG_DLL_DECL LogSink {
   // Sink's logging logic (message_len is such as to exclude '\n' at the end).
   // This method can't use LOG() or CHECK() as logging system mutex(s) are held
   // during this call.
+  virtual void send(LogSeverity severity, const char* full_filename,
+                    const char* base_filename, int line,
+                    const struct ::tm* tm_time,
+                    const char* message, size_t message_len, int32 usecs) {
+    send(severity, full_filename, base_filename, line,
+         tm_time, message, message_len);
+  }
+  // This send() signature is obsolete.
+  // New implementations should define this in terms of
+  // the above send() method.
   virtual void send(LogSeverity severity, const char* full_filename,
                     const char* base_filename, int line,
                     const struct ::tm* tm_time,
@@ -1447,7 +1457,15 @@ class GOOGLE_GLOG_DLL_DECL LogSink {
   // Can be useful to implement send().
   static std::string ToString(LogSeverity severity, const char* file, int line,
                               const struct ::tm* tm_time,
-                              const char* message, size_t message_len);
+                              const char* message, size_t message_len,
+                              int32 usecs);
+
+  // Obsolete
+  static std::string ToString(LogSeverity severity, const char* file, int line,
+                              const struct ::tm* tm_time,
+                              const char* message, size_t message_len) {
+    return ToString(severity, file, line, tm_time, message, message_len, 0);
+  }
 };
 
 // Add or remove a LogSink as a consumer of logging data.  Thread-safe.
diff --git a/src/logging.cc b/src/logging.cc
index 0c86cf6..2da00eb 100644
--- a/src/logging.cc
+++ b/src/logging.cc
@@ -349,6 +349,7 @@ struct LogMessage::LogMessageData  {
   };
   time_t timestamp_;            // Time of creation of LogMessage
   struct ::tm tm_time_;         // Time of creation of LogMessage
+  int32 usecs_;                   // Time of creation of LogMessage - microseconds part
   size_t num_prefix_chars_;     // # of chars of prefix in this message
   size_t num_chars_to_log_;     // # of chars of msg to send to log
   size_t num_chars_to_syslog_;  // # of chars of msg to send to syslog
@@ -515,7 +516,8 @@ class LogDestination {
                          int line,
                          const struct ::tm* tm_time,
                          const char* message,
-                         size_t message_len);
+                         size_t message_len,
+                         int32 usecs);
 
   // Wait for all registered sinks via WaitTillSent
   // including the optional one in "data".
@@ -782,12 +784,13 @@ inline void LogDestination::LogToSinks(LogSeverity severity,
                                        int line,
                                        const struct ::tm* tm_time,
                                        const char* message,
-                                       size_t message_len) {
+                                       size_t message_len,
+                                       int32 usecs) {
   ReaderMutexLock l(&sink_mutex_);
   if (sinks_) {
     for (int i = sinks_->size() - 1; i >= 0; i--) {
       (*sinks_)[i]->send(severity, full_filename, base_filename,
-                         line, tm_time, message, message_len);
+                         line, tm_time, message, message_len, usecs);
     }
   }
 }
@@ -1265,7 +1268,7 @@ void LogMessage::Init(const char* file,
   WallTime now = WallTime_Now();
   data_->timestamp_ = static_cast<time_t>(now);
   localtime_r(&data_->timestamp_, &data_->tm_time_);
-  int usecs = static_cast<int>((now - data_->timestamp_) * 1000000);
+  data_->usecs_ = static_cast<int32>((now - data_->timestamp_) * 1000000);
 
   data_->num_chars_to_log_ = 0;
   data_->num_chars_to_syslog_ = 0;
@@ -1285,7 +1288,7 @@ void LogMessage::Init(const char* file,
              << setw(2) << data_->tm_time_.tm_hour  << ':'
              << setw(2) << data_->tm_time_.tm_min   << ':'
              << setw(2) << data_->tm_time_.tm_sec   << "."
-             << setw(6) << usecs
+             << setw(6) << data_->usecs_
              << ' '
              << setfill(' ') << setw(5)
              << static_cast<unsigned int>(GetTID()) << setfill('0')
@@ -1432,7 +1435,8 @@ void LogMessage::SendToLog() EXCLUSIVE_LOCKS_REQUIRED(log_mutex) {
                                data_->line_, &data_->tm_time_,
                                data_->message_text_ + data_->num_prefix_chars_,
                                (data_->num_chars_to_log_ -
-                                data_->num_prefix_chars_ - 1));
+                                data_->num_prefix_chars_ - 1),
+                               data_->usecs_);
   } else {
 
     // log this message to all log files of severity <= severity_
@@ -1449,7 +1453,8 @@ void LogMessage::SendToLog() EXCLUSIVE_LOCKS_REQUIRED(log_mutex) {
                                data_->line_, &data_->tm_time_,
                                data_->message_text_ + data_->num_prefix_chars_,
                                (data_->num_chars_to_log_
-                                - data_->num_prefix_chars_ - 1));
+                                - data_->num_prefix_chars_ - 1),
+                               data_->usecs_);
     // NOTE: -1 removes trailing \n
   }
 
@@ -1545,7 +1550,8 @@ void LogMessage::SendToSink() EXCLUSIVE_LOCKS_REQUIRED(log_mutex) {
                        data_->line_, &data_->tm_time_,
                        data_->message_text_ + data_->num_prefix_chars_,
                        (data_->num_chars_to_log_ -
-                        data_->num_prefix_chars_ - 1));
+                        data_->num_prefix_chars_ - 1),
+                       data_->usecs_);
   }
 }
 
@@ -1672,16 +1678,10 @@ void LogSink::WaitTillSent() {
 
 string LogSink::ToString(LogSeverity severity, const char* file, int line,
                          const struct ::tm* tm_time,
-                         const char* message, size_t message_len) {
+                         const char* message, size_t message_len, int32 usecs) {
   ostringstream stream(string(message, message_len));
   stream.fill('0');
 
-  // FIXME(jrvb): Updating this to use the correct value for usecs
-  // requires changing the signature for both this method and
-  // LogSink::send().  This change needs to be done in a separate CL
-  // so subclasses of LogSink can be updated at the same time.
-  int usecs = 0;
-
   stream << LogSeverityNames[severity][0]
          << setw(2) << 1+tm_time->tm_mon
          << setw(2) << tm_time->tm_mday
diff --git a/src/logging_unittest.cc b/src/logging_unittest.cc
index 762c752..7f9de36 100644
--- a/src/logging_unittest.cc
+++ b/src/logging_unittest.cc
@@ -487,9 +487,16 @@ class TestLogSinkImpl : public LogSink {
   virtual void send(LogSeverity severity, const char* /* full_filename */,
                     const char* base_filename, int line,
                     const struct tm* tm_time,
-                    const char* message, size_t message_len) {
+                    const char* message, size_t message_len, int usecs) {
     errors.push_back(
-      ToString(severity, base_filename, line, tm_time, message, message_len));
+      ToString(severity, base_filename, line, tm_time, message, message_len, usecs));
+  }
+  virtual void send(LogSeverity severity, const char* full_filename,
+                    const char* base_filename, int line,
+                    const struct tm* tm_time,
+                    const char* message, size_t message_len) {
+    send(severity, full_filename, base_filename, line,
+         tm_time, message, message_len, 0);
   }
 };
 
@@ -1010,15 +1017,23 @@ class TestWaitingLogSink : public LogSink {
   virtual void send(LogSeverity severity, const char* /* full_filename */,
                     const char* base_filename, int line,
                     const struct tm* tm_time,
-                    const char* message, size_t message_len) {
+                    const char* message, size_t message_len, int usecs) {
     // Push it to Writer thread if we are the original logging thread.
     // Note: Something like ThreadLocalLogSink is a better choice
     //       to do thread-specific LogSink logic for real.
     if (pthread_equal(tid_, pthread_self())) {
       writer_.Buffer(ToString(severity, base_filename, line,
-                              tm_time, message, message_len));
+                              tm_time, message, message_len, usecs));
     }
   }
+
+  virtual void send(LogSeverity severity, const char* full_filename,
+                    const char* base_filename, int line,
+                    const struct tm* tm_time,
+                    const char* message, size_t message_len) {
+    send(severity, full_filename, base_filename, line, tm_time, message, message_len);
+  }
+
   virtual void WaitTillSent() {
     // Wait for Writer thread if we are the original logging thread.
     if (pthread_equal(tid_, pthread_self()))  writer_.Wait();
diff --git a/src/windows/glog/logging.h b/src/windows/glog/logging.h
index 3681fa3..d8193ae 100755
--- a/src/windows/glog/logging.h
+++ b/src/windows/glog/logging.h
@@ -1427,6 +1427,16 @@ class GOOGLE_GLOG_DLL_DECL LogSink {
   // Sink's logging logic (message_len is such as to exclude '\n' at the end).
   // This method can't use LOG() or CHECK() as logging system mutex(s) are held
   // during this call.
+  virtual void send(LogSeverity severity, const char* full_filename,
+                    const char* base_filename, int line,
+                    const struct ::tm* tm_time,
+                    const char* message, size_t message_len, int32 usecs) {
+    send(severity, full_filename, base_filename, line,
+         tm_time, message, message_len);
+  }
+  // This send() signature is obsolete.
+  // New implementations should define this in terms of
+  // the above send() method.
   virtual void send(LogSeverity severity, const char* full_filename,
                     const char* base_filename, int line,
                     const struct ::tm* tm_time,
@@ -1451,7 +1461,15 @@ class GOOGLE_GLOG_DLL_DECL LogSink {
   // Can be useful to implement send().
   static std::string ToString(LogSeverity severity, const char* file, int line,
                               const struct ::tm* tm_time,
-                              const char* message, size_t message_len);
+                              const char* message, size_t message_len,
+                              int32 usecs);
+
+  // Obsolete
+  static std::string ToString(LogSeverity severity, const char* file, int line,
+                              const struct ::tm* tm_time,
+                              const char* message, size_t message_len) {
+    return ToString(severity, file, line, tm_time, message, message_len, 0);
+  }
 };
 
 // Add or remove a LogSink as a consumer of logging data.  Thread-safe.