Adding initial support for alternative protobuf libraries.
diff --git a/src/compiler/config.h b/src/compiler/config.h
new file mode 100644
index 0000000..dc8803c
--- /dev/null
+++ b/src/compiler/config.h
@@ -0,0 +1,93 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * 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.
+ *
+ */
+
+#ifndef SRC_COMPILER_CONFIG_H
+#define SRC_COMPILER_CONFIG_H
+
+#include <grpc++/config.h>
+
+#ifndef GRPC_CUSTOM_DESCRIPTOR
+#include <google/protobuf/descriptor.h>
+#include <google/protobuf/descriptor.pb.h>
+#define GRPC_CUSTOM_DESCRIPTOR ::google::protobuf::Descriptor
+#define GRPC_CUSTOM_FILEDESCRIPTOR ::google::protobuf::FileDescriptor
+#define GRPC_CUSTOM_METHODDESCRIPTOR ::google::protobuf::MethodDescriptor
+#define GRPC_CUSTOM_SERVICEDESCRIPTOR ::google::protobuf::ServiceDescriptor
+#endif
+
+#ifndef GRPC_CUSTOM_CODEGENERATOR
+#include <google/protobuf/compiler/code_generator.h>
+#define GRPC_CUSTOM_CODEGENERATOR ::google::protobuf::compiler::CodeGenerator
+#define GRPC_CUSTOM_GENERATORCONTEXT ::google::protobuf::compiler::GeneratorContext
+#endif
+
+#ifndef GRPC_CUSTOM_PRINTER
+#include <google/protobuf/io/coded_stream.h>
+#include <google/protobuf/io/printer.h>
+#include <google/protobuf/io/zero_copy_stream.h>
+#include <google/protobuf/io/zero_copy_stream_impl_lite.h>
+#define GRPC_CUSTOM_PRINTER ::google::protobuf::io::Printer
+#define GRPC_CUSTOM_CODEDOUTPUTSTREAM ::google::protobuf::io::CodedOutputStream
+#define GRPC_CUSTOM_STRINGOUTPUTSTREAM ::google::protobuf::io::StringOutputStream
+#define GRPC_CUSTOM_ZEROCOPYOUTPUTSTREAM ::google::protobuf::io::ZeroCopyOutputStream
+#endif
+
+#ifndef GRPC_CUSTOM_PLUGINMAIN
+#include <google/protobuf/compiler/plugin.h>
+#define GRPC_CUSTOM_PLUGINMAIN ::google::protobuf::compiler::PluginMain
+#endif
+
+namespace grpc {
+namespace protobuf {
+typedef GRPC_CUSTOM_DESCRIPTOR Descriptor;
+typedef GRPC_CUSTOM_FILEDESCRIPTOR FileDescriptor;
+typedef GRPC_CUSTOM_METHODDESCRIPTOR MethodDescriptor;
+typedef GRPC_CUSTOM_SERVICEDESCRIPTOR ServiceDescriptor;
+namespace compiler {
+typedef GRPC_CUSTOM_CODEGENERATOR CodeGenerator;
+typedef GRPC_CUSTOM_GENERATORCONTEXT GeneratorContext;
+static inline int PluginMain(int argc, char* argv[],
+ const CodeGenerator* generator) {
+ return GRPC_CUSTOM_PLUGINMAIN(argc, argv, generator);
+}
+} // namespace compiler
+namespace io {
+typedef GRPC_CUSTOM_PRINTER Printer;
+typedef GRPC_CUSTOM_CODEDOUTPUTSTREAM CodedOutputStream;
+typedef GRPC_CUSTOM_STRINGOUTPUTSTREAM StringOutputStream;
+typedef GRPC_CUSTOM_ZEROCOPYOUTPUTSTREAM ZeroCopyOutputStream;
+} // namespace io
+} // namespace protobuf
+} // namespace grpc
+
+#endif // SRC_COMPILER_CONFIG_H