Remove static initializers introduced by open-vcdiff's logging.h.

sdch/logging_forward.h

Index: sdch/logging_forward.h
diff --git a/sdch/logging_forward.h b/sdch/logging_forward.h
new file mode 100644
index 0000000000000000000000000000000000000000..536317bfbdc926b1e8c6a4997b9335f17927c655
--- /dev/null
+++ b/sdch/logging_forward.h
@@ -0,0 +1,22 @@
+// Copyright (c) 2013 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 SDCH_LOGGING_FORWARD_H_
+#define SDCH_LOGGING_FORWARD_H_
+
+#include "base/logging.h"
+
+// open-vcdiff's logging.h includes iostream, which adds static initializers
+// to several compilation units. To prevent this, provide this replacement
+// header which forwards open-vcdiffs logging macros to chromium's base logging
+// mechanism.
+#define VCD_WARNING LOG(WARNING)
+#define VCD_ERROR LOG(ERROR)
+#define VCD_DFATAL LOG(DFATAL)
+#define VCD_ENDL "\n"

[wtc, 2013/11/12 18:14:03]

This is missing the open_vcdiff::CheckFatalError() call in the original code. I
think it is OK because our LOG(DFATAL) should provide the equivalent
functionality.

[Nico, 2013/11/12 18:34:42]

Yes. (I think LOG(DFATAL) might implicitly add a newline too, so just "" might
be enough too. Not sure though, and I suppose it doesn't matter much either
way.)

+
+// Define open-vcdiff's logging.h header guard, so that it doesn't get used.
+#define OPEN_VCDIFF_LOGGING_H_

[wtc, 2013/11/12 18:14:03]

Nit: it seems a little better to define this header guard right below line 6, so
that both header guards are side by side.

[Nico, 2013/11/12 18:34:42]

Done.

[jar (doing other things), 2013/11/13 00:34:45]

+1

+
+#endif  // SDCH_LOGGING_FORWARD_H_