Only define ERROR on windows builds

base/logging.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BASE_LOGGING_H_
 #define BASE_LOGGING_H_
 
 #include <cassert>
 #include <string>
 #include <cstring>
@@ skipping 312 matching lines @@
   COMPACT_GOOGLE_LOG_EX_WARNING(LogMessage)
 #define COMPACT_GOOGLE_LOG_ERROR \
   COMPACT_GOOGLE_LOG_EX_ERROR(LogMessage)
 #define COMPACT_GOOGLE_LOG_ERROR_REPORT \
   COMPACT_GOOGLE_LOG_EX_ERROR_REPORT(LogMessage)
 #define COMPACT_GOOGLE_LOG_FATAL \
   COMPACT_GOOGLE_LOG_EX_FATAL(LogMessage)
 #define COMPACT_GOOGLE_LOG_DFATAL \
   COMPACT_GOOGLE_LOG_EX_DFATAL(LogMessage)
 
+#if defined(OS_WIN)
 // wingdi.h defines ERROR to be 0. When we call LOG(ERROR), it gets

[cpu_(ooo_6.6-7.5), 2012/12/27 23:07:20]

so if the workaround is still there for windows, why do we need to modify the
win8 code with "0" ?

 // substituted with 0, and it expands to COMPACT_GOOGLE_LOG_0. To allow us
 // to keep using this syntax, we define this macro to do the same thing
 // as COMPACT_GOOGLE_LOG_ERROR, and also define ERROR the same way that
 // the Windows SDK does for consistency.
 #define ERROR 0
 #define COMPACT_GOOGLE_LOG_EX_0(ClassName, ...) \
   COMPACT_GOOGLE_LOG_EX_ERROR(ClassName , ##__VA_ARGS__)
 #define COMPACT_GOOGLE_LOG_0 COMPACT_GOOGLE_LOG_ERROR
 // Needed for LOG_IS_ON(ERROR).
 const LogSeverity LOG_0 = LOG_ERROR;
+#endif
 
 // As special cases, we can assume that LOG_IS_ON(ERROR_REPORT) and
 // LOG_IS_ON(FATAL) always hold.  Also, LOG_IS_ON(DFATAL) always holds
 // in debug mode.  In particular, CHECK()s will always fire if they
 // fail.
 #define LOG_IS_ON(severity) \
   ((::logging::LOG_ ## severity) >= ::logging::GetMinLogLevel())
 
 // We can't do any caching tricks with VLOG_IS_ON() like the
 // google-glog version since it requires GCC extensions.  This means
@@ skipping 623 matching lines @@
 #elif NOTIMPLEMENTED_POLICY == 4
 #define NOTIMPLEMENTED() LOG(ERROR) << NOTIMPLEMENTED_MSG
 #elif NOTIMPLEMENTED_POLICY == 5
 #define NOTIMPLEMENTED() do {\
   static int count = 0;\
   LOG_IF(ERROR, 0 == count++) << NOTIMPLEMENTED_MSG;\
 } while(0)
 #endif
 
 #endif  // BASE_LOGGING_H_