/*=========================================================================

  Program:   CMake - Cross-Platform Makefile Generator
  Module:    $RCSfile: cmMakefileTargetGenerator.cxx,v $
  Language:  C++
  Date:      $Date: 2008-06-13 12:55:17 $
  Version:   $Revision: 1.93.2.6 $

  Copyright (c) 2002 Kitware, Inc., Insight Consortium.  All rights reserved.
  See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/
#include "cmMakefileTargetGenerator.h"

#include "cmGeneratedFileStream.h"
#include "cmGlobalGenerator.h"
#include "cmGlobalUnixMakefileGenerator3.h"
#include "cmLocalUnixMakefileGenerator3.h"
#include "cmMakefile.h"
#include "cmSourceFile.h"
#include "cmTarget.h"
#include "cmake.h"
#include "cmComputeLinkInformation.h"

#include "cmMakefileExecutableTargetGenerator.h"
#include "cmMakefileLibraryTargetGenerator.h"
#include "cmMakefileUtilityTargetGenerator.h"


cmMakefileTargetGenerator::cmMakefileTargetGenerator(cmTarget* target)
{
  this->BuildFileStream = 0;
  this->InfoFileStream = 0;
  this->FlagFileStream = 0;
  this->CustomCommandDriver = OnBuild;
  this->FortranModuleDirectoryComputed = false;
  this->Target = target;
  this->Makefile = this->Target->GetMakefile();
  this->LocalGenerator =
    static_cast<cmLocalUnixMakefileGenerator3*>(
      this->Makefile->GetLocalGenerator());
  this->GlobalGenerator =
    static_cast<cmGlobalUnixMakefileGenerator3*>(
      this->LocalGenerator->GetGlobalGenerator());
}

cmMakefileTargetGenerator *
cmMakefileTargetGenerator::New(cmTarget *tgt)
{
  cmMakefileTargetGenerator *result = 0;

  switch (tgt->GetType())
    {
    case cmTarget::EXECUTABLE:
      result = new cmMakefileExecutableTargetGenerator(tgt);
      break;
    case cmTarget::STATIC_LIBRARY:
    case cmTarget::SHARED_LIBRARY:
    case cmTarget::MODULE_LIBRARY:
      result = new cmMakefileLibraryTargetGenerator(tgt);
      break;
    case cmTarget::UTILITY:
      result = new cmMakefileUtilityTargetGenerator(tgt);
      break;
    default:
      return result;
      // break; /* unreachable */
    }
  return result;
}

//----------------------------------------------------------------------------
void cmMakefileTargetGenerator::CreateRuleFile()
{
  // Create a directory for this target.
  this->TargetBuildDirectory =
    this->LocalGenerator->GetTargetDirectory(*this->Target);
  this->TargetBuildDirectoryFull =
    this->LocalGenerator->ConvertToFullPath(this->TargetBuildDirectory);
  cmSystemTools::MakeDirectory(this->TargetBuildDirectoryFull.c_str());

  // Construct the rule file name.
  this->BuildFileName = this->TargetBuildDirectory;
  this->BuildFileName += "/build.make";
  this->BuildFileNameFull = this->TargetBuildDirectoryFull;
  this->BuildFileNameFull += "/build.make";

  // Construct the rule file name.
  this->ProgressFileName = this->TargetBuildDirectory;
  this->ProgressFileName += "/progress.make";
  this->ProgressFileNameFull = this->TargetBuildDirectoryFull;
  this->ProgressFileNameFull += "/progress.make";

  // reset the progress count
  this->NumberOfProgressActions = 0;

  // Open the rule file.  This should be copy-if-different because the
  // rules may depend on this file itself.
  this->BuildFileStream =
    new cmGeneratedFileStream(this->BuildFileNameFull.c_str());
  this->BuildFileStream->SetCopyIfDifferent(true);
  if(!this->BuildFileStream)
    {
    return;
    }
  this->LocalGenerator->WriteDisclaimer(*this->BuildFileStream);
  this->LocalGenerator->WriteSpecialTargetsTop(*this->BuildFileStream);
}

//----------------------------------------------------------------------------
void cmMakefileTargetGenerator::WriteTargetBuildRules()
{
  // write the custom commands for this target
  // Look for files registered for cleaning in this directory.
  if(const char* additional_clean_files =
     this->Makefile->GetProperty
     ("ADDITIONAL_MAKE_CLEAN_FILES"))
    {
    cmSystemTools::ExpandListArgument(additional_clean_files,
                                      this->CleanFiles);
    }

  // add custom commands to the clean rules?
  const char* clean_no_custom =
    this->Makefile->GetProperty("CLEAN_NO_CUSTOM");
  bool clean = cmSystemTools::IsOff(clean_no_custom);

  // First generate the object rule files.  Save a list of all object
  // files for this target.
  const std::vector<cmSourceFile*>& sources = this->Target->GetSourceFiles();
  for(std::vector<cmSourceFile*>::const_iterator source = sources.begin();
      source != sources.end(); ++source)
    {
    cmTarget::SourceFileFlags tsFlags =
      this->Target->GetTargetSourceFileFlags(*source);
    if(cmCustomCommand* cc = (*source)->GetCustomCommand())
      {
      this->GenerateCustomRuleFile(*cc);
      if (clean)
        {
        const std::vector<std::string>& outputs = cc->GetOutputs();
        for(std::vector<std::string>::const_iterator o = outputs.begin();
            o != outputs.end(); ++o)
          {
          this->CleanFiles.push_back
            (this->Convert(o->c_str(),
                           cmLocalGenerator::START_OUTPUT,
                           cmLocalGenerator::UNCHANGED));
          }
        }
      }
    else if(tsFlags.Type != cmTarget::SourceFileTypeNormal)
      {
      this->WriteMacOSXContentRules(*(*source), tsFlags.MacFolder);
      }
    else if(!(*source)->GetPropertyAsBool("HEADER_FILE_ONLY"))
      {
      if(!this->GlobalGenerator->IgnoreFile
         ((*source)->GetExtension().c_str()))
        {
        // Generate this object file's rule file.
        this->WriteObjectRuleFiles(*(*source));
        }
      else if((*source)->GetPropertyAsBool("EXTERNAL_OBJECT"))
        {
        // This is an external object file.  Just add it.
        this->ExternalObjects.push_back((*source)->GetFullPath());
        }
      else
        {
        // We only get here if a source file is not an external object
        // and has an extension that is listed as an ignored file type
        // for this language.  No message or diagnosis should be
        // given.
        }
      }
    }
}


//----------------------------------------------------------------------------
void cmMakefileTargetGenerator::WriteCommonCodeRules()
{
  // Include the dependencies for the target.
  std::string dependFileNameFull = this->TargetBuildDirectoryFull;
  dependFileNameFull += "/depend.make";
  *this->BuildFileStream
    << "# Include any dependencies generated for this target.\n"
    << this->LocalGenerator->IncludeDirective << " "
    << this->Convert(dependFileNameFull.c_str(),
                     cmLocalGenerator::HOME_OUTPUT,
                     cmLocalGenerator::MAKEFILE)
    << "\n\n";
  
  // Include the progress variables for the target.
  *this->BuildFileStream
    << "# Include the progress variables for this target.\n"
    << this->LocalGenerator->IncludeDirective << " "
    << this->Convert(this->ProgressFileNameFull.c_str(),
                     cmLocalGenerator::HOME_OUTPUT,
                     cmLocalGenerator::MAKEFILE)
    << "\n\n";

  // make sure the depend file exists
  if (!cmSystemTools::FileExists(dependFileNameFull.c_str()))
    {
    // Write an empty dependency file.
    cmGeneratedFileStream depFileStream(dependFileNameFull.c_str());
    depFileStream
      << "# Empty dependencies file for " << this->Target->GetName() << ".\n"
      << "# This may be replaced when dependencies are built." << std::endl;
    }

  // Open the flags file.  This should be copy-if-different because the
  // rules may depend on this file itself.
  this->FlagFileNameFull = this->TargetBuildDirectoryFull;
  this->FlagFileNameFull += "/flags.make";
  this->FlagFileStream =
    new cmGeneratedFileStream(this->FlagFileNameFull.c_str());
  this->FlagFileStream->SetCopyIfDifferent(true);
  if(!this->FlagFileStream)
    {
    return;
    }
  this->LocalGenerator->WriteDisclaimer(*this->FlagFileStream);

  // Include the flags for the target.
  *this->BuildFileStream
    << "# Include the compile flags for this target's objects.\n"
    << this->LocalGenerator->IncludeDirective << " "
    << this->Convert(this->FlagFileNameFull.c_str(),
                                     cmLocalGenerator::HOME_OUTPUT,
                                     cmLocalGenerator::MAKEFILE)
    << "\n\n";
}

//----------------------------------------------------------------------------
void cmMakefileTargetGenerator::WriteTargetLanguageFlags()
{
  // write language flags for target
  std::set<cmStdString> languages;
  this->Target->GetLanguages(languages);
    // put the compiler in the rules.make file so that if it changes
  // things rebuild
  for(std::set<cmStdString>::const_iterator l = languages.begin();
      l != languages.end(); ++l)
    {
    cmStdString compiler = "CMAKE_";
    compiler += *l;
    compiler += "_COMPILER";
    *this->FlagFileStream << "# compile " << l->c_str() << " with " << 
      this->Makefile->GetSafeDefinition(compiler.c_str()) << "\n";
    }

  for(std::set<cmStdString>::const_iterator l = languages.begin();
      l != languages.end(); ++l)
    {
    const char *lang = l->c_str();
    std::string flags;
    std::string defines;
    bool shared = ((this->Target->GetType() == cmTarget::SHARED_LIBRARY) ||
                   (this->Target->GetType() == cmTarget::MODULE_LIBRARY));

    // Add the export symbol definition for shared library objects.
    if(const char* exportMacro = this->Target->GetExportMacro())
      {
      flags += "-D";
      flags += exportMacro;
      }

    // Add preprocessor definitions for this target and configuration.
    this->LocalGenerator->AppendDefines
      (defines, this->Makefile->GetProperty("COMPILE_DEFINITIONS"), lang);
    this->LocalGenerator->AppendDefines
      (defines, this->Target->GetProperty("COMPILE_DEFINITIONS"), lang);
    std::string defPropName = "COMPILE_DEFINITIONS_";
    defPropName +=
      cmSystemTools::UpperCase(this->LocalGenerator->ConfigurationName);
    this->LocalGenerator->AppendDefines
      (defines, this->Makefile->GetProperty(defPropName.c_str()), lang);
    this->LocalGenerator->AppendDefines
      (defines, this->Target->GetProperty(defPropName.c_str()), lang);

    // Add language-specific flags.
    this->LocalGenerator
      ->AddLanguageFlags(flags, lang,
                         this->LocalGenerator->ConfigurationName.c_str());

    // Fortran-specific flags computed for this target.
    if(*l == "Fortran")
      {
      this->AddFortranFlags(flags);
      }

    // Add shared-library flags if needed.
    this->LocalGenerator->AddSharedFlags(flags, lang, shared);

    // Add include directory flags.
    this->LocalGenerator->
      AppendFlags(flags, this->LocalGenerator->GetIncludeFlags(lang));
    // Add include directory flags.
    this->LocalGenerator->
      AppendFlags(flags,this->GetFrameworkFlags().c_str());

    *this->FlagFileStream << lang << "_FLAGS = " << flags << "\n\n";
    *this->FlagFileStream << lang << "_DEFINES = " << defines << "\n\n";
    }

  // Add target-specific flags.
  if(this->Target->GetProperty("COMPILE_FLAGS"))
    {
    std::string flags;    
    this->LocalGenerator->AppendFlags
      (flags, this->Target->GetProperty("COMPILE_FLAGS"));
    *this->FlagFileStream << "# TARGET_FLAGS = " << flags << "\n\n";
    }
}

//----------------------------------------------------------------------------
void cmMakefileTargetGenerator::WriteMacOSXContentRules(cmSourceFile& source,
                                                        const char* pkgloc)
{
  // Skip OS X content when not building a Framework or Bundle.
  if(this->MacContentDirectory.empty())
    {
    return;
    }

  // Construct the full path to the content subdirectory.
  std::string macdir = this->MacContentDirectory;
  macdir += pkgloc;
  cmSystemTools::MakeDirectory(macdir.c_str());

  // Record use of this content location.  Only the first level
  // directory is needed.
  {
  std::string loc = pkgloc;
  loc = loc.substr(0, loc.find('/'));
  this->MacContentFolders.insert(loc);
  }

  // Get the input file location.
  std::string input = source.GetFullPath();

  // Get the output file location.
  std::string output = macdir;
  output += "/";
  output += cmSystemTools::GetFilenameName(input);
  this->CleanFiles.push_back(this->Convert(output.c_str(),
                                           cmLocalGenerator::START_OUTPUT));
  output = this->Convert(output.c_str(), cmLocalGenerator::HOME_OUTPUT);

  // Create a rule to copy the content into the bundle.
  std::vector<std::string> depends;
  std::vector<std::string> commands;
  depends.push_back(input);
  std::string copyEcho = "Copying OS X content ";
  copyEcho += output;
  this->LocalGenerator->AppendEcho(commands, copyEcho.c_str(),
                                   cmLocalUnixMakefileGenerator3::EchoBuild);
  std::string copyCommand = "$(CMAKE_COMMAND) -E copy ";
  copyCommand += this->Convert(input.c_str(),
                               cmLocalGenerator::NONE,
                               cmLocalGenerator::SHELL);
  copyCommand += " ";
  copyCommand += this->Convert(output.c_str(),
                               cmLocalGenerator::NONE,
                               cmLocalGenerator::SHELL);
  commands.push_back(copyCommand);
  this->LocalGenerator->WriteMakeRule(*this->BuildFileStream, 0,
                                      output.c_str(),
                                      depends, commands, false);
  this->ExtraFiles.insert(output);
}

//----------------------------------------------------------------------------
void cmMakefileTargetGenerator::WriteObjectRuleFiles(cmSourceFile& source)
{
  // Identify the language of the source file.
  const char* lang = this->LocalGenerator->GetSourceFileLanguage(source);
  if(!lang)
    {
    // don't know anything about this file so skip it
    return;
    }

  // Get the full path name of the object file.
  bool hasSourceExtension;
  std::string objNoTargetDir;
  std::string obj =
    this->LocalGenerator->GetObjectFileName(*this->Target, source,
                                            &objNoTargetDir,
                                            &hasSourceExtension);

  // Avoid generating duplicate rules.
  if(this->ObjectFiles.find(obj) == this->ObjectFiles.end())
    {
    this->ObjectFiles.insert(obj);
    }
  else
    {
    cmOStringStream err;
    err << "Warning: Source file \""
        << source.GetFullPath()
        << "\" is listed multiple times for target \""
        << this->Target->GetName()
        << "\".";
    cmSystemTools::Message(err.str().c_str(), "Warning");
    return;
    }

  // Create the directory containing the object file.  This may be a
  // subdirectory under the target's directory.
  std::string dir = cmSystemTools::GetFilenamePath(obj.c_str());
  cmSystemTools::MakeDirectory
    (this->LocalGenerator->ConvertToFullPath(dir).c_str());

  // Save this in the target's list of object files.
  this->Objects.push_back(obj);
  this->CleanFiles.push_back(obj);

  // TODO: Remove
  //std::string relativeObj
  //= this->LocalGenerator->GetHomeRelativeOutputPath();
  //relativeObj += obj;

  // we compute some depends when writing the depend.make that we will also
  // use in the build.make, same with depMakeFile
  std::vector<std::string> depends;
  std::string depMakeFile;

  // generate the build rule file
  this->WriteObjectBuildFile(obj, lang, source, depends);

  // The object file should be checked for dependency integrity.
  std::string objFullPath = this->Makefile->GetCurrentOutputDirectory();
  objFullPath += "/";
  objFullPath += obj;
  objFullPath =
    this->Convert(objFullPath.c_str(), cmLocalGenerator::FULL);
  std::string srcFullPath =
    this->Convert(source.GetFullPath().c_str(), cmLocalGenerator::FULL);
  this->LocalGenerator->
    AddImplicitDepends(*this->Target, lang,
                       objFullPath.c_str(),
                       srcFullPath.c_str());

  // add this to the list of objects for this local generator
  if(cmSystemTools::FileIsFullPath(objNoTargetDir.c_str()))
    {
    objNoTargetDir = cmSystemTools::GetFilenameName(objNoTargetDir);
    }
  cmLocalUnixMakefileGenerator3::LocalObjectInfo& info =
    this->LocalGenerator->LocalObjectFiles[objNoTargetDir];
  info.HasSourceExtension = hasSourceExtension;
  info.push_back(
    cmLocalUnixMakefileGenerator3::LocalObjectEntry(this->Target, lang)
    );
}

//----------------------------------------------------------------------------
void
cmMakefileTargetGenerator
::WriteObjectBuildFile(std::string &obj,
                       const char *lang,
                       cmSourceFile& source,
                       std::vector<std::string>& depends)
{
  this->LocalGenerator->AppendRuleDepend(depends,
                                         this->FlagFileNameFull.c_str());

  // generate the depend scanning rule
  this->WriteObjectDependRules(source, depends);

  std::string relativeObj = this->LocalGenerator->GetHomeRelativeOutputPath();
  relativeObj += obj;
  // Write the build rule.

  // Build the set of compiler flags.
  std::string flags;

  // Add language-specific flags.
  std::string langFlags = "$(";
  langFlags += lang;
  langFlags += "_FLAGS)";
  this->LocalGenerator->AppendFlags(flags, langFlags.c_str());

  // Add target-specific flags.
  if(this->Target->GetProperty("COMPILE_FLAGS"))
    {
    std::string langIncludeExpr = "CMAKE_";
    langIncludeExpr += lang;
    langIncludeExpr += "_FLAG_REGEX";
    const char* regex = this->Makefile->
      GetDefinition(langIncludeExpr.c_str());
    if(regex)
      {
      cmsys::RegularExpression r(regex);
      std::vector<std::string> args;
      cmSystemTools::ParseWindowsCommandLine(
        this->Target->GetProperty("COMPILE_FLAGS"),
        args);
      for(std::vector<std::string>::iterator i = args.begin();
          i != args.end(); ++i)
        {
        if(r.find(i->c_str()))
          {
          this->LocalGenerator->AppendFlags
            (flags, i->c_str());
          }
        }
      }
    else
      {
      this->LocalGenerator->AppendFlags
        (flags, this->Target->GetProperty("COMPILE_FLAGS"));
      }
    }

  // Add flags from source file properties.
  if (source.GetProperty("COMPILE_FLAGS"))
    {
    this->LocalGenerator->AppendFlags
      (flags, source.GetProperty("COMPILE_FLAGS"));
    *this->FlagFileStream << "# Custom flags: "
                          << relativeObj << "_FLAGS = "
                          << source.GetProperty("COMPILE_FLAGS")
                          << "\n"
                          << "\n";
    }

  // Add language-specific defines.
  std::string defines = "$(";
  defines += lang;
  defines += "_DEFINES)";

  // Add source-sepcific preprocessor definitions.
  if(const char* compile_defs = source.GetProperty("COMPILE_DEFINITIONS"))
    {
    this->LocalGenerator->AppendDefines(defines, compile_defs, lang);
    *this->FlagFileStream << "# Custom defines: "
                          << relativeObj << "_DEFINES = "
                          << compile_defs << "\n"
                          << "\n";
    }
  std::string configUpper =
    cmSystemTools::UpperCase(this->LocalGenerator->ConfigurationName);
  std::string defPropName = "COMPILE_DEFINITIONS_";
  defPropName += configUpper;
  if(const char* config_compile_defs =
     source.GetProperty(defPropName.c_str()))
    {
    this->LocalGenerator->AppendDefines(defines, config_compile_defs, lang);
    *this->FlagFileStream
      << "# Custom defines: "
      << relativeObj << "_DEFINES_" << configUpper
      << " = " << config_compile_defs << "\n"
      << "\n";
    }

  // Get the output paths for source and object files.
  std::string sourceFile = source.GetFullPath();
  if(this->LocalGenerator->UseRelativePaths)
    {
    sourceFile = this->Convert(sourceFile.c_str(),
                               cmLocalGenerator::HOME_OUTPUT);
    }
  sourceFile = this->Convert(sourceFile.c_str(),
                             cmLocalGenerator::NONE,
                             cmLocalGenerator::SHELL);
  std::string objectFile = this->Convert(obj.c_str(),
                                         cmLocalGenerator::START_OUTPUT,
                                         cmLocalGenerator::SHELL);

  // Construct the build message.
  std::vector<std::string> no_commands;
  std::vector<std::string> commands;

  // add in a progress call if needed
  std::string progressDir = this->Makefile->GetHomeOutputDirectory();
  progressDir += cmake::GetCMakeFilesDirectory();
  cmOStringStream progCmd;
  progCmd << "$(CMAKE_COMMAND) -E cmake_progress_report ";
  progCmd << this->LocalGenerator->Convert(progressDir.c_str(),
                                           cmLocalGenerator::FULL,
                                           cmLocalGenerator::SHELL);
  this->NumberOfProgressActions++;
  progCmd << " $(CMAKE_PROGRESS_" 
          << this->NumberOfProgressActions 
          << ")";
  commands.push_back(progCmd.str());

  std::string buildEcho = "Building ";
  buildEcho += lang;
  buildEcho += " object ";
  buildEcho += relativeObj;
  this->LocalGenerator->AppendEcho(commands, buildEcho.c_str(),
                                   cmLocalUnixMakefileGenerator3::EchoBuild);

  // Construct the compile rules.
  std::string compileRuleVar = "CMAKE_";
  compileRuleVar += lang;
  compileRuleVar += "_COMPILE_OBJECT";
  std::string compileRule =
    this->Makefile->GetRequiredDefinition(compileRuleVar.c_str());
  std::vector<std::string> compileCommands;
  cmSystemTools::ExpandListArgument(compileRule, compileCommands);

  // Change the command working directory to the local build tree.
  this->LocalGenerator->CreateCDCommand
    (compileCommands,
     this->Makefile->GetStartOutputDirectory(),
     this->Makefile->GetHomeOutputDirectory());
  commands.insert(commands.end(),
                  compileCommands.begin(), compileCommands.end());

  std::string targetOutPathPDB;
  {
  std::string targetFullPathPDB;
  const char* configName = this->LocalGenerator->ConfigurationName.c_str();
  if(this->Target->GetType() == cmTarget::EXECUTABLE ||
     this->Target->GetType() == cmTarget::STATIC_LIBRARY ||
     this->Target->GetType() == cmTarget::SHARED_LIBRARY ||
     this->Target->GetType() == cmTarget::MODULE_LIBRARY)
    {
    targetFullPathPDB = this->Target->GetDirectory();
    targetFullPathPDB += "/";
    targetFullPathPDB += this->Target->GetPDBName(configName);
    }
  targetOutPathPDB =
    this->Convert(targetFullPathPDB.c_str(),cmLocalGenerator::FULL,
                  cmLocalGenerator::SHELL);
  }
  cmLocalGenerator::RuleVariables vars;
  vars.Language = lang;
  vars.TargetPDB = targetOutPathPDB.c_str();
  vars.Source = sourceFile.c_str();
  std::string shellObj =
    this->Convert(obj.c_str(),
                  cmLocalGenerator::NONE,
                  cmLocalGenerator::SHELL).c_str();
  vars.Object = shellObj.c_str();
  std::string objectDir = cmSystemTools::GetFilenamePath(obj);
  objectDir = this->Convert(objectDir.c_str(),
                            cmLocalGenerator::START_OUTPUT,
                            cmLocalGenerator::SHELL);
  vars.ObjectDir = objectDir.c_str();
  vars.Flags = flags.c_str();
  vars.Defines = defines.c_str();

  // Expand placeholders in the commands.
  for(std::vector<std::string>::iterator i = commands.begin();
      i != commands.end(); ++i)
    {
    this->LocalGenerator->ExpandRuleVariables(*i, vars);
    }


  // Write the rule.
  this->LocalGenerator->WriteMakeRule(*this->BuildFileStream, 0,
                                      relativeObj.c_str(),
                                      depends, commands, false);

  // Check for extra outputs created by the compilation.
  if(const char* extra_outputs_str =
     source.GetProperty("OBJECT_OUTPUTS"))
    {
    std::vector<std::string> extra_outputs;
    cmSystemTools::ExpandListArgument(extra_outputs_str, extra_outputs);
    for(std::vector<std::string>::const_iterator eoi = extra_outputs.begin();
        eoi != extra_outputs.end(); ++eoi)
      {
      // Register this as an extra output for the object file rule.
      // This will cause the object file to be rebuilt if the extra
      // output is missing.
      this->GenerateExtraOutput(eoi->c_str(), relativeObj.c_str(), false);

      // Register this as an extra file to clean.
      this->CleanFiles.push_back(eoi->c_str());
      }
    }

  bool lang_is_c_or_cxx = ((strcmp(lang, "C") == 0) ||
                           (strcmp(lang, "CXX") == 0));
  bool do_preprocess_rules = lang_is_c_or_cxx &&
    this->LocalGenerator->GetCreatePreprocessedSourceRules();
  bool do_assembly_rules = lang_is_c_or_cxx &&
    this->LocalGenerator->GetCreateAssemblySourceRules();
  if(do_preprocess_rules || do_assembly_rules)
    {
    std::vector<std::string> force_depends;
    force_depends.push_back("cmake_force");
    std::string::size_type dot_pos = relativeObj.rfind(".");
    std::string relativeObjBase = relativeObj.substr(0, dot_pos);
    dot_pos = obj.rfind(".");
    std::string objBase = obj.substr(0, dot_pos);

    if(do_preprocess_rules)
      {
      commands.clear();
      std::string relativeObjI = relativeObjBase + ".i";
      std::string objI = objBase + ".i";

      std::string preprocessEcho = "Preprocessing ";
      preprocessEcho += lang;
      preprocessEcho += " source to ";
      preprocessEcho += objI;
      this->LocalGenerator->AppendEcho(
        commands, preprocessEcho.c_str(),
        cmLocalUnixMakefileGenerator3::EchoBuild
        );

      std::string preprocessRuleVar = "CMAKE_";
      preprocessRuleVar += lang;
      preprocessRuleVar += "_CREATE_PREPROCESSED_SOURCE";
      if(const char* preprocessRule =
         this->Makefile->GetDefinition(preprocessRuleVar.c_str()))
        {
        std::vector<std::string> preprocessCommands;
        cmSystemTools::ExpandListArgument(preprocessRule, preprocessCommands);
        this->LocalGenerator->CreateCDCommand
          (preprocessCommands,
           this->Makefile->GetStartOutputDirectory(),
           this->Makefile->GetHomeOutputDirectory());
        commands.insert(commands.end(),
                        preprocessCommands.begin(),
                        preprocessCommands.end());

        std::string shellObjI =
          this->Convert(objI.c_str(),
                        cmLocalGenerator::NONE,
                        cmLocalGenerator::SHELL).c_str();
        vars.PreprocessedSource = shellObjI.c_str();

        // Expand placeholders in the commands.
        for(std::vector<std::string>::iterator i = commands.begin();
            i != commands.end(); ++i)
          {
          this->LocalGenerator->ExpandRuleVariables(*i, vars);
          }
        }
      else
        {
        std::string cmd = "$(CMAKE_COMMAND) -E cmake_unimplemented_variable ";
        cmd += preprocessRuleVar;
        commands.push_back(cmd);
        }

      this->LocalGenerator->WriteMakeRule(*this->BuildFileStream, 0,
                                          relativeObjI.c_str(),
                                          force_depends, commands, false);
      }

    if(do_assembly_rules)
      {
      commands.clear();
      std::string relativeObjS = relativeObjBase + ".s";
      std::string objS = objBase + ".s";

      std::string assemblyEcho = "Compiling ";
      assemblyEcho += lang;
      assemblyEcho += " source to assembly ";
      assemblyEcho += objS;
      this->LocalGenerator->AppendEcho(
        commands, assemblyEcho.c_str(),
        cmLocalUnixMakefileGenerator3::EchoBuild
        );

      std::string assemblyRuleVar = "CMAKE_";
      assemblyRuleVar += lang;
      assemblyRuleVar += "_CREATE_ASSEMBLY_SOURCE";
      if(const char* assemblyRule =
         this->Makefile->GetDefinition(assemblyRuleVar.c_str()))
        {
        std::vector<std::string> assemblyCommands;
        cmSystemTools::ExpandListArgument(assemblyRule, assemblyCommands);
        this->LocalGenerator->CreateCDCommand
          (assemblyCommands,
           this->Makefile->GetStartOutputDirectory(),
           this->Makefile->GetHomeOutputDirectory());
        commands.insert(commands.end(),
                        assemblyCommands.begin(),
                        assemblyCommands.end());

        std::string shellObjS =
          this->Convert(objS.c_str(),
                        cmLocalGenerator::NONE,
                        cmLocalGenerator::SHELL).c_str();
        vars.AssemblySource = shellObjS.c_str();

        // Expand placeholders in the commands.
        for(std::vector<std::string>::iterator i = commands.begin();
            i != commands.end(); ++i)
          {
          this->LocalGenerator->ExpandRuleVariables(*i, vars);
          }
        }
      else
        {
        std::string cmd = "$(CMAKE_COMMAND) -E cmake_unimplemented_variable ";
        cmd += assemblyRuleVar;
        commands.push_back(cmd);
        }

      this->LocalGenerator->WriteMakeRule(*this->BuildFileStream, 0,
                                          relativeObjS.c_str(),
                                          force_depends, commands, false);
      }
    }

  // If the language needs provides-requires mode, create the
  // corresponding targets.
  std::string objectRequires = relativeObj;
  objectRequires += ".requires";
  std::vector<std::string> p_depends;
  // always provide an empty requires target
  this->LocalGenerator->WriteMakeRule(*this->BuildFileStream, 0,
                                      objectRequires.c_str(), p_depends,
                                      no_commands, true);

  // write a build rule to recursively build what this obj provides
  std::string objectProvides = relativeObj;
  objectProvides += ".provides";
  std::string temp = relativeObj;
  temp += ".provides.build";
  std::vector<std::string> r_commands;
  std::string tgtMakefileName =
    this->LocalGenerator->GetRelativeTargetDirectory(*this->Target);
  tgtMakefileName += "/build.make";
  r_commands.push_back
    (this->LocalGenerator->GetRecursiveMakeCall(tgtMakefileName.c_str(),
                                                temp.c_str()));

  p_depends.clear();
  p_depends.push_back(objectRequires);
  this->LocalGenerator->WriteMakeRule(*this->BuildFileStream, 0,
                                      objectProvides.c_str(), p_depends,
                                      r_commands, true);

  // write the provides.build rule dependency on the obj file
  p_depends.clear();
  p_depends.push_back(relativeObj);
  this->LocalGenerator->WriteMakeRule(*this->BuildFileStream, 0,
                                      temp.c_str(), p_depends, no_commands,
                                      true);
}

//----------------------------------------------------------------------------
void cmMakefileTargetGenerator::WriteTargetRequiresRules()
{
  std::vector<std::string> depends;
  std::vector<std::string> no_commands;

  // Construct the name of the dependency generation target.
  std::string depTarget =
    this->LocalGenerator->GetRelativeTargetDirectory(*this->Target);
  depTarget += "/requires";

  // This target drives dependency generation for all object files.
  std::string relPath = this->LocalGenerator->GetHomeRelativeOutputPath();
  std::string objTarget;
  for(std::vector<std::string>::const_iterator obj = this->Objects.begin();
      obj != this->Objects.end(); ++obj)
    {
    objTarget = relPath;
    objTarget += *obj;
    objTarget += ".requires";
    depends.push_back(objTarget);
    }

  // Write the rule.
  this->LocalGenerator->WriteMakeRule(*this->BuildFileStream, 0,
                                      depTarget.c_str(),
                                      depends, no_commands, true);
}

//----------------------------------------------------------------------------
void cmMakefileTargetGenerator::WriteTargetCleanRules()
{
  std::vector<std::string> depends;
  std::vector<std::string> commands;

  // Construct the clean target name.
  std::string cleanTarget =
    this->LocalGenerator->GetRelativeTargetDirectory(*this->Target);
  cleanTarget += "/clean";

  // Construct the clean command.
  this->LocalGenerator->AppendCleanCommand(commands, this->CleanFiles,
                                           *this->Target);
  this->LocalGenerator->CreateCDCommand
    (commands,
     this->Makefile->GetStartOutputDirectory(),
     this->Makefile->GetHomeOutputDirectory());

  // Write the rule.
  this->LocalGenerator->WriteMakeRule(*this->BuildFileStream, 0,
                                      cleanTarget.c_str(),
                                      depends, commands, true);
}


//----------------------------------------------------------------------------
void cmMakefileTargetGenerator::WriteTargetDependRules()
{
  // must write the targets depend info file
  std::string dir = this->LocalGenerator->GetTargetDirectory(*this->Target);
  this->InfoFileNameFull = dir;
  this->InfoFileNameFull += "/DependInfo.cmake";
  this->InfoFileNameFull =
    this->LocalGenerator->ConvertToFullPath(this->InfoFileNameFull);
  this->InfoFileStream =
    new cmGeneratedFileStream(this->InfoFileNameFull.c_str());
  this->InfoFileStream->SetCopyIfDifferent(true);
  if(!*this->InfoFileStream)
    {
    return;
    }
  this->LocalGenerator->
    WriteDependLanguageInfo(*this->InfoFileStream,*this->Target);

  // Store multiple output pairs in the depend info file.
  if(!this->MultipleOutputPairs.empty())
    {
    *this->InfoFileStream
      << "\n"
      << "# Pairs of files generated by the same build rule.\n"
      << "SET(CMAKE_MULTIPLE_OUTPUT_PAIRS\n";
    for(MultipleOutputPairsType::const_iterator pi =
          this->MultipleOutputPairs.begin();
        pi != this->MultipleOutputPairs.end(); ++pi)
      {
      *this->InfoFileStream
        << "  " << this->LocalGenerator->EscapeForCMake(pi->first.c_str())
        << " "  << this->LocalGenerator->EscapeForCMake(pi->second.c_str())
        << "\n";
      }
    *this->InfoFileStream << "  )\n\n";
    }

  // Store list of targets linked directly or transitively.
  {
  *this->InfoFileStream
    << "\n"
    << "# Targets to which this target links.\n"
    << "SET(CMAKE_TARGET_LINKED_INFO_FILES\n";
  cmGlobalGenerator* gg = this->GlobalGenerator;
  std::set<cmTarget const*> emitted;
  cmTarget::LinkLibraryVectorType const& libs =
    this->Target->GetLinkLibraries();
  for(cmTarget::LinkLibraryVectorType::const_iterator j = libs.begin();
      j != libs.end(); ++j)
    {
    if(cmTarget const* linkee = gg->FindTarget(0, j->first.c_str()))
      {
      if(emitted.insert(linkee).second)
        {
        cmMakefile* mf = linkee->GetMakefile();
        cmLocalGenerator* lg = mf->GetLocalGenerator();
        std::string di = mf->GetStartOutputDirectory();
        di += "/";
        di += lg->GetTargetDirectory(*linkee);
        di += "/DependInfo.cmake";
        *this->InfoFileStream << "  \"" << di << "\"\n";
        }
      }
    }
  *this->InfoFileStream
    << "  )\n";
  }

  // Check for a target-specific module output directory.
  if(const char* mdir = this->GetFortranModuleDirectory())
    {
    *this->InfoFileStream
      << "\n"
      << "# Fortran module output directory.\n"
      << "SET(CMAKE_Fortran_TARGET_MODULE_DIR \"" << mdir << "\")\n";
    }

  // and now write the rule to use it
  std::vector<std::string> depends;
  std::vector<std::string> commands;

  // Construct the name of the dependency generation target.
  std::string depTarget =
    this->LocalGenerator->GetRelativeTargetDirectory(*this->Target);
  depTarget += "/depend";

  // Add a command to call CMake to scan dependencies.  CMake will
  // touch the corresponding depends file after scanning dependencies.
  cmOStringStream depCmd;
  // TODO: Account for source file properties and directory-level
  // definitions when scanning for dependencies.
#if !defined(_WIN32) || defined(__CYGWIN__)
  // This platform supports symlinks, so cmSystemTools will translate
  // paths.  Make sure PWD is set to the original name of the home
  // output directory to help cmSystemTools to create the same
  // translation table for the dependency scanning process.
  depCmd << "cd "
         << (this->LocalGenerator->Convert(
               this->Makefile->GetHomeOutputDirectory(),
               cmLocalGenerator::FULL, cmLocalGenerator::SHELL))
         << " && ";
#endif
  // Generate a call this signature:
  //
  //   cmake -E cmake_depends <generator>
  //                          <home-src-dir> <start-src-dir>
  //                          <home-out-dir> <start-out-dir>
  //                          <dep-info> --color=$(COLOR)
  //
  // This gives the dependency scanner enough information to recreate
  // the state of our local generator sufficiently for its needs.
  depCmd << "$(CMAKE_COMMAND) -E cmake_depends \""
         << this->GlobalGenerator->GetName() << "\" "
         << this->Convert(this->Makefile->GetHomeDirectory(),
                          cmLocalGenerator::FULL, cmLocalGenerator::SHELL)
         << " "
         << this->Convert(this->Makefile->GetStartDirectory(),
                          cmLocalGenerator::FULL, cmLocalGenerator::SHELL)
         << " "
         << this->Convert(this->Makefile->GetHomeOutputDirectory(),
                          cmLocalGenerator::FULL, cmLocalGenerator::SHELL)
         << " "
         << this->Convert(this->Makefile->GetStartOutputDirectory(),
                          cmLocalGenerator::FULL, cmLocalGenerator::SHELL)
         << " "
         << this->Convert(this->InfoFileNameFull.c_str(),
                          cmLocalGenerator::FULL, cmLocalGenerator::SHELL)
         << " --color=$(COLOR)";
  commands.push_back(depCmd.str());

  // Make sure all custom command outputs in this target are built.
  if(this->CustomCommandDriver == OnDepends)
    {
    this->DriveCustomCommands(depends);
    }

  // Write the rule.
  this->LocalGenerator->WriteMakeRule(*this->BuildFileStream, 0,
                                      depTarget.c_str(),
                                      depends, commands, true);
}

//----------------------------------------------------------------------------
void
cmMakefileTargetGenerator
::DriveCustomCommands(std::vector<std::string>& depends)
{
  // Depend on all custom command outputs.
  const std::vector<cmSourceFile*>& sources =
    this->Target->GetSourceFiles();
  for(std::vector<cmSourceFile*>::const_iterator source = sources.begin();
      source != sources.end(); ++source)
    {
    if(cmCustomCommand* cc = (*source)->GetCustomCommand())
      {
      const std::vector<std::string>& outputs = cc->GetOutputs();
      for(std::vector<std::string>::const_iterator o = outputs.begin();
          o != outputs.end(); ++o)
        {
        depends.push_back(*o);
        }
      }
    }
}

//----------------------------------------------------------------------------
void cmMakefileTargetGenerator
::WriteObjectDependRules(cmSourceFile& source,
                         std::vector<std::string>& depends)
{
  // Create the list of dependencies known at cmake time.  These are
  // shared between the object file and dependency scanning rule.
  depends.push_back(source.GetFullPath());
  if(const char* objectDeps = source.GetProperty("OBJECT_DEPENDS"))
    {
    std::vector<std::string> deps;
    cmSystemTools::ExpandListArgument(objectDeps, deps);
    for(std::vector<std::string>::iterator i = deps.begin();
        i != deps.end(); ++i)
      {
      depends.push_back(i->c_str());
      }
    }
}

//----------------------------------------------------------------------------
void cmMakefileTargetGenerator
::GenerateCustomRuleFile(const cmCustomCommand& cc)
{
  // Collect the commands.
  std::vector<std::string> commands;
  std::string comment = this->LocalGenerator->ConstructComment(cc);
  if(!comment.empty())
    {
    // add in a progress call if needed
    std::string progressDir = this->Makefile->GetHomeOutputDirectory();
    progressDir += cmake::GetCMakeFilesDirectory();
    cmOStringStream progCmd;
    progCmd << "$(CMAKE_COMMAND) -E cmake_progress_report ";
    progCmd << this->LocalGenerator->Convert(progressDir.c_str(),
                                             cmLocalGenerator::FULL,
                                             cmLocalGenerator::SHELL);
    this->NumberOfProgressActions++;
    progCmd << " $(CMAKE_PROGRESS_" 
            << this->NumberOfProgressActions 
            << ")";
    commands.push_back(progCmd.str());
    this->LocalGenerator
      ->AppendEcho(commands, comment.c_str(),
                   cmLocalUnixMakefileGenerator3::EchoGenerate);
    }
  // Below we need to skip over the echo and progress commands.
  unsigned int skip = static_cast<unsigned int>(commands.size());

  // Now append the actual user-specified commands.
  this->LocalGenerator->AppendCustomCommand(commands, cc);

  // Collect the dependencies.
  std::vector<std::string> depends;
  this->LocalGenerator->AppendCustomDepend(depends, cc);

  // Check whether we need to bother checking for a symbolic output.
  bool need_symbolic = this->GlobalGenerator->GetNeedSymbolicMark();

  // Write the rule.
  const std::vector<std::string>& outputs = cc.GetOutputs();
  std::vector<std::string>::const_iterator o = outputs.begin();
  {
  bool symbolic = false;
  if(need_symbolic)
    {
    if(cmSourceFile* sf = this->Makefile->GetSource(o->c_str()))
      {
      symbolic = sf->GetPropertyAsBool("SYMBOLIC");
      }
    }
  this->LocalGenerator->WriteMakeRule(*this->BuildFileStream, 0,
                                      o->c_str(), depends, commands,
                                      symbolic);

  // If the rule has changed make sure the output is rebuilt.
  if(!symbolic)
    {
    this->GlobalGenerator->AddRuleHash(cc.GetOutputs(),
                                       commands.begin()+skip,
                                       commands.end());
    }
  }

  // Write rules to drive building any outputs beyond the first.
  const char* in = o->c_str();
  for(++o; o != outputs.end(); ++o)
    {
    bool symbolic = false;
    if(need_symbolic)
      {
      if(cmSourceFile* sf = this->Makefile->GetSource(o->c_str()))
        {
        symbolic = sf->GetPropertyAsBool("SYMBOLIC");
        }
      }
    this->GenerateExtraOutput(o->c_str(), in, symbolic);
    }

  // Setup implicit dependency scanning.
  for(cmCustomCommand::ImplicitDependsList::const_iterator
        idi = cc.GetImplicitDepends().begin();
      idi != cc.GetImplicitDepends().end(); ++idi)
    {
    std::string objFullPath =
      this->Convert(outputs[0].c_str(), cmLocalGenerator::FULL);
    std::string srcFullPath =
      this->Convert(idi->second.c_str(), cmLocalGenerator::FULL);
    this->LocalGenerator->
      AddImplicitDepends(*this->Target, idi->first.c_str(),
                         objFullPath.c_str(),
                         srcFullPath.c_str());
    }
}

//----------------------------------------------------------------------------
void
cmMakefileTargetGenerator
::GenerateExtraOutput(const char* out, const char* in, bool symbolic)
{
  // Add a rule to build the primary output if the extra output needs
  // to be created.
  std::vector<std::string> commands;
  std::vector<std::string> depends;
  std::string emptyCommand = this->GlobalGenerator->GetEmptyRuleHackCommand();
  if(!emptyCommand.empty())
    {
    commands.push_back(emptyCommand);
    }
  depends.push_back(in);
  this->LocalGenerator->WriteMakeRule(*this->BuildFileStream, 0,
                                      out, depends, commands,
                                      symbolic);

  // Register the extra output as paired with the first output so that
  // the check-build-system step will remove the primary output if any
  // extra outputs are missing.  This forces the rule to regenerate
  // all outputs.
  this->AddMultipleOutputPair(out, in);
}

//----------------------------------------------------------------------------
void
cmMakefileTargetGenerator
::WriteObjectsVariable(std::string& variableName,
                       std::string& variableNameExternal)
{
  // Write a make variable assignment that lists all objects for the
  // target.
  variableName =
    this->LocalGenerator->CreateMakeVariable(this->Target->GetName(),
                                             "_OBJECTS");
  *this->BuildFileStream
    << "# Object files for target " << this->Target->GetName() << "\n"
    << variableName.c_str() << " =";
  std::string object;
  const char* objName =
    this->Makefile->GetDefinition("CMAKE_NO_QUOTED_OBJECTS");
  const char* lineContinue =
    this->Makefile->GetDefinition("CMAKE_MAKE_LINE_CONTINUE");
  if(!lineContinue)
    {
    lineContinue = "\\";
    }
  for(std::vector<std::string>::const_iterator i = this->Objects.begin();
      i != this->Objects.end(); ++i)
    {
    *this->BuildFileStream << " " << lineContinue << "\n";
    if(objName)
      {
      *this->BuildFileStream <<
        this->Convert(i->c_str(), cmLocalGenerator::START_OUTPUT,
                      cmLocalGenerator::MAKEFILE);
      }
    else
      {
      *this->BuildFileStream  <<
        this->LocalGenerator->ConvertToQuotedOutputPath(i->c_str());
      }
    }
  *this->BuildFileStream << "\n";

  // Write a make variable assignment that lists all external objects
  // for the target.
  variableNameExternal =
    this->LocalGenerator->CreateMakeVariable(this->Target->GetName(),
                                             "_EXTERNAL_OBJECTS");
  *this->BuildFileStream
    << "\n"
    << "# External object files for target "
    << this->Target->GetName() << "\n"
    << variableNameExternal.c_str() << " =";
  for(std::vector<std::string>::const_iterator i =
        this->ExternalObjects.begin();
      i != this->ExternalObjects.end(); ++i)
    {
    object = this->Convert(i->c_str(),cmLocalGenerator::START_OUTPUT);
    *this->BuildFileStream
      << " " << lineContinue << "\n"
      << this->Makefile->GetSafeDefinition("CMAKE_OBJECT_NAME");
    if(objName)
      {
      *this->BuildFileStream  <<
        this->Convert(i->c_str(), cmLocalGenerator::START_OUTPUT,
                      cmLocalGenerator::MAKEFILE);
      }
    else
      {
      *this->BuildFileStream  <<
        this->LocalGenerator->ConvertToQuotedOutputPath(i->c_str());
      }
    }
  *this->BuildFileStream << "\n" << "\n";
}

//----------------------------------------------------------------------------
void
cmMakefileTargetGenerator
::WriteObjectsString(std::string& buildObjs)
{
  std::vector<std::string> objStrings;
  this->WriteObjectsStrings(objStrings);
  buildObjs = objStrings[0];
}

//----------------------------------------------------------------------------
class cmMakefileTargetGeneratorObjectStrings
{
public:
  cmMakefileTargetGeneratorObjectStrings(std::vector<std::string>& strings,
                                         cmMakefile* mf,
                                         cmLocalUnixMakefileGenerator3* lg,
                                         std::string::size_type limit):
    Strings(strings), Makefile(mf), LocalGenerator(lg), LengthLimit(limit)
    {
    this->Space = "";
    }
  void Feed(std::string const& obj)
    {
    // Construct the name of the next object.
    this->NextObject =
      this->LocalGenerator->Convert(obj.c_str(),
                                    cmLocalGenerator::START_OUTPUT,
                                    cmLocalGenerator::SHELL);

    // Roll over to next string if the limit will be exceeded.
    if(this->LengthLimit != std::string::npos &&
       (this->CurrentString.length() + 1 + this->NextObject.length()
        > this->LengthLimit))
      {
      this->Strings.push_back(this->CurrentString);
      this->CurrentString = "";
      this->Space = "";
      }

    // Separate from previous object.
    this->CurrentString += this->Space;
    this->Space = " ";

    // Append this object.
    this->CurrentString += this->NextObject;
    }
  void Done()
    {
    this->Strings.push_back(this->CurrentString);
    }
private:
  std::vector<std::string>& Strings;
  cmMakefile* Makefile;
  cmLocalUnixMakefileGenerator3* LocalGenerator;
  std::string::size_type LengthLimit;
  std::string CurrentString;
  std::string NextObject;
  const char* Space;
};

//----------------------------------------------------------------------------
void
cmMakefileTargetGenerator
::WriteObjectsStrings(std::vector<std::string>& objStrings,
                      std::string::size_type limit)
{
  cmMakefileTargetGeneratorObjectStrings
    helper(objStrings, this->Makefile, this->LocalGenerator, limit);
  for(std::vector<std::string>::const_iterator i = this->Objects.begin();
      i != this->Objects.end(); ++i)
    {
    helper.Feed(*i);
    }
  for(std::vector<std::string>::const_iterator i =
        this->ExternalObjects.begin();
      i != this->ExternalObjects.end(); ++i)
    {
    helper.Feed(*i);
    }
  helper.Done();
}

//----------------------------------------------------------------------------
void cmMakefileTargetGenerator::WriteTargetDriverRule(const char* main_output,
                                                      bool relink)
{
  // Compute the name of the driver target.
  std::string dir =
    this->LocalGenerator->GetRelativeTargetDirectory(*this->Target);
  std::string buildTargetRuleName = dir;
  buildTargetRuleName += relink?"/preinstall":"/build";
  buildTargetRuleName = this->Convert(buildTargetRuleName.c_str(),
                                      cmLocalGenerator::HOME_OUTPUT,
                                      cmLocalGenerator::UNCHANGED);

  // Build the list of target outputs to drive.
  std::vector<std::string> depends;
  if(main_output)
    {
    depends.push_back(main_output);
    }

  const char* comment = 0;
  if(relink)
    {
    // Setup the comment for the preinstall driver.
    comment = "Rule to relink during preinstall.";
    }
  else
    {
    // Setup the comment for the main build driver.
    comment = "Rule to build all files generated by this target.";

    // Make sure all custom command outputs in this target are built.
    if(this->CustomCommandDriver == OnBuild)
      {
      this->DriveCustomCommands(depends);
      }

    // Make sure the extra files are built.
    for(std::set<cmStdString>::const_iterator i = this->ExtraFiles.begin();
        i != this->ExtraFiles.end(); ++i)
      {
      depends.push_back(*i);
      }
    }

  // Write the driver rule.
  std::vector<std::string> no_commands;
  this->LocalGenerator->WriteMakeRule(*this->BuildFileStream, comment,
                                      buildTargetRuleName.c_str(),
                                      depends, no_commands, true);
}

//----------------------------------------------------------------------------
std::string cmMakefileTargetGenerator::GetFrameworkFlags()
{
#ifndef __APPLE__
  return std::string();
#else
  std::set<cmStdString> emitted;
  emitted.insert("/System/Library/Frameworks");
  std::vector<std::string> includes;
  this->LocalGenerator->GetIncludeDirectories(includes);
  std::vector<std::string>::iterator i;
  // check all include directories for frameworks as this
  // will already have added a -F for the framework
  for(i = includes.begin(); i != includes.end(); ++i)
    {
    if(this->Target->NameResolvesToFramework(i->c_str()))
      {
      std::string frameworkDir = *i;
      frameworkDir += "/../";
      frameworkDir = cmSystemTools::CollapseFullPath(frameworkDir.c_str());
      emitted.insert(frameworkDir);
      }
    }

  std::string flags;
  std::vector<std::string>& frameworks = this->Target->GetFrameworks();
  for(i = frameworks.begin();
      i != frameworks.end(); ++i)
    {
    if(emitted.insert(*i).second)
      {
      flags += "-F";
      flags += this->LocalGenerator->ConvertToOutputForExisting(i->c_str());
      flags += " ";
      }
    }
  return flags;
#endif
}

//----------------------------------------------------------------------------
void cmMakefileTargetGenerator
::AppendTargetDepends(std::vector<std::string>& depends)
{
  // Static libraries never depend on anything for linking.
  if(this->Target->GetType() == cmTarget::STATIC_LIBRARY)
    {
    return;
    }

  // Loop over all library dependencies.
  const char* cfg = this->LocalGenerator->ConfigurationName.c_str();
  if(cmComputeLinkInformation* cli = this->Target->GetLinkInformation(cfg))
    {
    std::vector<std::string> const& libDeps = cli->GetDepends();
    for(std::vector<std::string>::const_iterator j = libDeps.begin();
        j != libDeps.end(); ++j)
      {
      depends.push_back(*j);
      }
    }
}

//----------------------------------------------------------------------------
void cmMakefileTargetGenerator
::CloseFileStreams()
{
  delete this->BuildFileStream;
  delete this->InfoFileStream;
  delete this->FlagFileStream;
}

void cmMakefileTargetGenerator::RemoveForbiddenFlags(const char* flagVar,
                                                     const char* linkLang,
                                                     std::string& linkFlags)
{
  // check for language flags that are not allowed at link time, and
  // remove them, -w on darwin for gcc -w -dynamiclib sends -w to libtool
  // which fails, there may be more]

  std::string removeFlags = "CMAKE_";
  removeFlags += linkLang;
  removeFlags += flagVar;
  std::string removeflags =
    this->Makefile->GetSafeDefinition(removeFlags.c_str());
  std::vector<std::string> removeList;
  cmSystemTools::ExpandListArgument(removeflags, removeList);
  for(std::vector<std::string>::iterator i = removeList.begin();
      i != removeList.end(); ++i)
    {
    cmSystemTools::ReplaceString(linkFlags, i->c_str(), "");
    }
}

void cmMakefileTargetGenerator::WriteProgressVariables(unsigned long total,
                                                       unsigned long &current)
{
  cmGeneratedFileStream *progressFileStream = 
    new cmGeneratedFileStream(this->ProgressFileNameFull.c_str());
  if(!progressFileStream)
    {
    return;
    }

  unsigned long num;
  unsigned long i;
  for (i = 1; i <= this->NumberOfProgressActions; ++i)
    {
    *progressFileStream
      << "CMAKE_PROGRESS_" << i << " = ";
    if (total <= 100)
      {
      num = i + current;
      *progressFileStream << num;
      this->LocalGenerator->ProgressFiles[this->Target->GetName()]
        .push_back(num);
      }
    else if (((i+current)*100)/total > ((i-1+current)*100)/total)
      {
      num = ((i+current)*100)/total;
      *progressFileStream << num;
      this->LocalGenerator->ProgressFiles[this->Target->GetName()]
        .push_back(num);
      }
    *progressFileStream << "\n";
    }
  *progressFileStream << "\n";
  current += this->NumberOfProgressActions;
  delete progressFileStream;
}

//----------------------------------------------------------------------------
void
cmMakefileTargetGenerator
::AddMultipleOutputPair(const char* depender, const char* dependee)
{
  MultipleOutputPairsType::value_type p(depender, dependee);
  this->MultipleOutputPairs.insert(p);
}

//----------------------------------------------------------------------------
void
cmMakefileTargetGenerator
::CreateLinkScript(const char* name,
                   std::vector<std::string> const& link_commands,
                   std::vector<std::string>& makefile_commands,
                   std::vector<std::string>& makefile_depends)
{
  // Create the link script file.
  std::string linkScriptName = this->TargetBuildDirectoryFull;
  linkScriptName += "/";
  linkScriptName += name;
  cmGeneratedFileStream linkScriptStream(linkScriptName.c_str());
  linkScriptStream.SetCopyIfDifferent(true);
  for(std::vector<std::string>::const_iterator cmd = link_commands.begin();
      cmd != link_commands.end(); ++cmd)
    {
    // Do not write out empty commands or commands beginning in the
    // shell no-op ":".
    if(!cmd->empty() && (*cmd)[0] != ':')
      {
      linkScriptStream << *cmd << "\n";
      }
    }

  // Create the makefile command to invoke the link script.
  std::string link_command = "$(CMAKE_COMMAND) -E cmake_link_script ";
  link_command += this->Convert(linkScriptName.c_str(),
                                cmLocalGenerator::START_OUTPUT,
                                cmLocalGenerator::SHELL);
  link_command += " --verbose=$(VERBOSE)";
  makefile_commands.push_back(link_command);
  makefile_depends.push_back(linkScriptName);
}

//----------------------------------------------------------------------------
std::string
cmMakefileTargetGenerator
::CreateResponseFile(const char* name, std::string const& options,
                     std::vector<std::string>& makefile_depends)
{
  // Create the response file.
  std::string responseFileNameFull = this->TargetBuildDirectoryFull;
  responseFileNameFull += "/";
  responseFileNameFull += name;
  cmGeneratedFileStream responseStream(responseFileNameFull.c_str());
  responseStream.SetCopyIfDifferent(true);
  responseStream << options << "\n";

  // Add a dependency so the target will rebuild when the set of
  // objects changes.
  makefile_depends.push_back(responseFileNameFull);

  // Construct the name to be used on the command line.
  std::string responseFileName = this->TargetBuildDirectory;
  responseFileName += "/";
  responseFileName += name;
  return responseFileName;
}

//----------------------------------------------------------------------------
const char* cmMakefileTargetGenerator::GetFortranModuleDirectory()
{
  // Compute the module directory.
  if(!this->FortranModuleDirectoryComputed)
    {
    const char* target_mod_dir =
      this->Target->GetProperty("Fortran_MODULE_DIRECTORY");
    const char* moddir_flag =
      this->Makefile->GetDefinition("CMAKE_Fortran_MODDIR_FLAG");
    if(target_mod_dir && moddir_flag)
      {
      // Compute the full path to the module directory.
      if(cmSystemTools::FileIsFullPath(target_mod_dir))
        {
        // Already a full path.
        this->FortranModuleDirectory = target_mod_dir;
        }
      else
        {
        // Interpret relative to the current output directory.
        this->FortranModuleDirectory =
          this->Makefile->GetCurrentOutputDirectory();
        this->FortranModuleDirectory += "/";
        this->FortranModuleDirectory += target_mod_dir;
        }

      // Make sure the module output directory exists.
      cmSystemTools::MakeDirectory(this->FortranModuleDirectory.c_str());
      }
    this->FortranModuleDirectoryComputed = true;
    }

  // Return the computed directory.
  if(this->FortranModuleDirectory.empty())
    {
    return 0;
    }
  else
    {
    return this->FortranModuleDirectory.c_str();
    }
}

//----------------------------------------------------------------------------
void cmMakefileTargetGenerator::AddFortranFlags(std::string& flags)
{
  // Add a module output directory flag if necessary.
  if(const char* mod_dir = this->GetFortranModuleDirectory())
    {
    const char* moddir_flag =
      this->Makefile->GetRequiredDefinition("CMAKE_Fortran_MODDIR_FLAG");
    std::string modflag = moddir_flag;
    modflag += this->Convert(mod_dir,
                             cmLocalGenerator::START_OUTPUT,
                             cmLocalGenerator::SHELL);
    this->LocalGenerator->AppendFlags(flags, modflag.c_str());
    }

  // If there is a separate module path flag then duplicate the
  // include path with it.  This compiler does not search the include
  // path for modules.
  if(const char* modpath_flag =
     this->Makefile->GetDefinition("CMAKE_Fortran_MODPATH_FLAG"))
    {
    std::vector<std::string> includes;
    this->LocalGenerator->GetIncludeDirectories(includes);
    for(std::vector<std::string>::const_iterator idi = includes.begin();
        idi != includes.end(); ++idi)
      {
      std::string flg = modpath_flag;
      flg += this->Convert(idi->c_str(),
                           cmLocalGenerator::NONE,
                           cmLocalGenerator::SHELL);
      this->LocalGenerator->AppendFlags(flags, flg.c_str());
      }
    }
}
