Implement LLVM JIT side of GDB JIT debugging interface

include/llvm/Target/TargetOptions.h

 //===-- llvm/Target/TargetOptions.h - Target Options ------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file defines command line option flags that are shared across various
@@ skipping 84 matching lines @@
   /// crt*.o compiling).
   extern bool NoZerosInBSS;
 
   /// DwarfExceptionHandling - This flag indicates that Dwarf exception
   /// information should be emitted.
   extern bool DwarfExceptionHandling;
 
   /// SjLjExceptionHandling - This flag indicates that SJLJ exception
   /// information should be emitted.
   extern bool SjLjExceptionHandling;
+
+  /// JITEmitDebugInfo - This flag indicates that the JIT should try to emit
+  /// debug information and notify a debugger about it.
+  extern bool JITEmitDebugInfo;
 
   /// UnwindTablesMandatory - This flag indicates that unwind tables should
   /// be emitted for all functions.
   extern bool UnwindTablesMandatory;
 
   /// PerformTailCallOpt - This flag is enabled when -tailcallopt is specified
   /// on the commandline. When the flag is on, the target will perform tail call
   /// optimization (pop the caller's stack) providing it supports it.
   extern bool PerformTailCallOpt;
 
@@ skipping 13 matching lines @@
   /// compile time.
   extern bool EnableFastISel;
   
   /// StrongPHIElim - This flag enables more aggressive PHI elimination
   /// wth earlier copy coalescing.
   extern bool StrongPHIElim;
 
 } // End llvm namespace
 
 #endif