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diff --git a/src/google/protobuf/compiler/package_info.h b/src/google/protobuf/compiler/package_info.h
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+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc. All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Author: kenton@google.com (Kenton Varda)
+// Based on original Protocol Buffers design by
+// Sanjay Ghemawat, Jeff Dean, and others.
+//
+// This file exists solely to document the google::protobuf::compiler namespace.
+// It is not compiled into anything, but it may be read by an automated
+// documentation generator.
+
+namespace google {
+
+namespace protobuf {
+
+// Implementation of the Protocol Buffer compiler.
+//
+// This package contains code for parsing .proto files and generating code
+// based on them. There are two reasons you might be interested in this
+// package:
+// - You want to parse .proto files at runtime. In this case, you should
+// look at importer.h. Since this functionality is widely useful, it is
+// included in the libprotobuf base library; you do not have to link against
+// libprotoc.
+// - You want to write a custom protocol compiler which generates different
+// kinds of code, e.g. code in a different language which is not supported
+// by the official compiler. For this purpose, command_line_interface.h
+// provides you with a complete compiler front-end, so all you need to do
+// is write a custom implementation of CodeGenerator and a trivial main()
+// function. You can even make your compiler support the official languages
+// in addition to your own. Since this functionality is only useful to those
+// writing custom compilers, it is in a separate library called "libprotoc"
+// which you will have to link against.
+namespace compiler {}
+
+} // namespace protobuf
+} // namespace google