Clang toolchain driver for PNaCl

include/clang/Driver/ToolChain.h

 //===--- ToolChain.h - Collections of tools for one platform ----*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_CLANG_DRIVER_TOOLCHAIN_H
@@ skipping 327 matching lines @@
   virtual void AddCCKextLibArgs(const llvm::opt::ArgList &Args,
                                 llvm::opt::ArgStringList &CmdArgs) const;
 
   /// AddFastMathRuntimeIfAvailable - If a runtime library exists that sets
   /// global flags for unsafe floating point math, add it and return true.
   ///
   /// This checks for presence of the -Ofast, -ffast-math or -funsafe-math flags.
   virtual bool
   AddFastMathRuntimeIfAvailable(const llvm::opt::ArgList &Args,
                                 llvm::opt::ArgStringList &CmdArgs) const;
+
+  /// isBitcodeOnlyTarget - Whether the toolchain has a coresponding backend
+  /// target.
+  virtual bool isBitcodeOnlyTarget() const { return false; }
 };
 
 } // end namespace driver
 } // end namespace clang
 
 #endif