Switch usage of _DEBUG macro to NDEBUG.

webrtc/base/logging.cc

 /*
  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 74 matching lines @@
   char buffer[16];
   snprintf(buffer, sizeof(buffer), "0x%08x", err);
   return buffer;
 }
 
 /////////////////////////////////////////////////////////////////////////////
 // LogMessage
 /////////////////////////////////////////////////////////////////////////////
 
 // By default, release builds don't log, debug builds at info level
-#if _DEBUG
+#if !defined(NDEBUG)
 LoggingSeverity LogMessage::min_sev_ = LS_INFO;
 LoggingSeverity LogMessage::dbg_sev_ = LS_INFO;
-#else  // !_DEBUG
+#else
 LoggingSeverity LogMessage::min_sev_ = LS_NONE;
 LoggingSeverity LogMessage::dbg_sev_ = LS_NONE;
-#endif  // !_DEBUG
+#endif
 bool LogMessage::log_to_stderr_ = true;
 
 namespace {
 // Global lock for log subsystem, only needed to serialize access to streams_.
 CriticalSection g_log_crit;
 }  // namespace
 
 // The list of logging streams currently configured.
 // Note: we explicitly do not clean this up, because of the uncertain ordering
 // of destructors at program exit.  Let the person who sets the stream trigger
@@ skipping 221 matching lines @@
   for (auto& kv : streams_) {
     min_sev = std::min(dbg_sev_, kv.second);
   }
   min_sev_ = min_sev;
 }
 
 void LogMessage::OutputToDebug(const std::string& str,
                                LoggingSeverity severity,
                                const std::string& tag) {
   bool log_to_stderr = log_to_stderr_;
-#if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS) && (!defined(_DEBUG) || defined(NDEBUG))
+#if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS) && defined(NDEBUG)
   // On the Mac, all stderr output goes to the Console log and causes clutter.
   // So in opt builds, don't log to stderr unless the user specifically sets
   // a preference to do so.
   CFStringRef key = CFStringCreateWithCString(kCFAllocatorDefault,
                                               "logToStdErr",
                                               kCFStringEncodingUTF8);
   CFStringRef domain = CFBundleGetIdentifier(CFBundleGetMainBundle());
   if (key != NULL && domain != NULL) {
     Boolean exists_and_is_valid;
     Boolean should_log =
@@ skipping 193 matching lines @@
   }
 
   if (state) {
     state->unprintable_count_[input] = consecutive_unprintable;
   }
 }
 
 //////////////////////////////////////////////////////////////////////
 
 }  // namespace rtc