Subzero: Fix g++ warnings.

src/IceClFlags.cpp

 //===- subzero/src/IceClFlags.cpp - Command line flags and parsing --------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
 /// \brief Defines commandline flags parsing of class Ice::ClFlags.
 ///
 /// This currently relies on llvm::cl to parse. In the future, the minimal build
 /// can have a simpler parser.
 ///
 //===----------------------------------------------------------------------===//
 
 #include "IceClFlags.h"
 
 #include "IceClFlagsExtra.h"
 
+#ifdef __clang__
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wunused-parameter"
+#endif // __clang__
+
 #include "llvm/Support/CommandLine.h"
+
+#ifdef __clang__
 #pragma clang diagnostic pop
+#endif // __clang__
 
 namespace cl = llvm::cl;
 
 /// Options which are captured in Ice::ClFlags and propagated.
 
 namespace {
 
 /// Allow error recovery when reading PNaCl bitcode.
 cl::opt<bool> AllowErrorRecovery(
     "allow-pnacl-reader-error-recovery",
@@ skipping 515 matching lines @@
   OutFlagsExtra.setGenerateBuildAtts(GenerateBuildAtts);
   OutFlagsExtra.setLLVMVerboseErrors(LLVMVerboseErrors);
   OutFlagsExtra.setAppName(AppName);
   OutFlagsExtra.setInputFileFormat(InputFileFormat);
   OutFlagsExtra.setIRFilename(IRFilename);
   OutFlagsExtra.setLogFilename(LogFilename);
   OutFlagsExtra.setOutputFilename(OutputFilename);
 }
 
 } // end of namespace Ice