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

  Program:   CMake - Cross-Platform Makefile Generator3
  Module:    $RCSfile$
  Language:  C++
  Date:      $Date$
  Version:   $Revision$

  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 "cmGlobalUnixMakefileGenerator3.h"
#include "cmLocalUnixMakefileGenerator3.h"
#include "cmMakefile.h"
#include "cmake.h"
#include "cmGeneratedFileStream.h"

cmGlobalUnixMakefileGenerator3::cmGlobalUnixMakefileGenerator3()
{
  // This type of makefile always requires unix style paths
  this->ForceUnixPaths = true;
  this->FindMakeProgramFile = "CMakeUnixFindMake.cmake";
  this->ToolSupportsColorVT100 = true;
}

void cmGlobalUnixMakefileGenerator3
::EnableLanguage(std::vector<std::string>const& languages, cmMakefile *mf)
{
  this->cmGlobalGenerator::EnableLanguage(languages, mf);
  std::string path;
  for(std::vector<std::string>::const_iterator l = languages.begin();
      l != languages.end(); ++l)
    {
    if(*l == "NONE")
      {
      continue;
      }
    const char* lang = l->c_str();
    std::string langComp = "CMAKE_";
    langComp += lang;
    langComp += "_COMPILER";
    
    if(!mf->GetDefinition(langComp.c_str()))
      {
      cmSystemTools::Error(langComp.c_str(), " not set, after EnableLanguage");
      continue;
      }
    const char* name = mf->GetRequiredDefinition(langComp.c_str());
    if(!cmSystemTools::FileIsFullPath(name))
      {
      path = cmSystemTools::FindProgram(name);
      }
    else
      {
      path = name;
      }
    if(path.size() == 0 || !cmSystemTools::FileExists(path.c_str()))
      {
      std::string message = "your ";
      message += lang;
      message += " compiler: \"";
      message +=  name;
      message += "\" was not found.   Please set ";
      message += langComp;
      message += " to a valid compiler path or name.";
      cmSystemTools::Error(message.c_str());
      path = name;
      }
    std::string doc = lang;
    doc += " compiler.";
    mf->AddCacheDefinition(langComp.c_str(), path.c_str(),
                           doc.c_str(), cmCacheManager::FILEPATH);
    }
}

///! Create a local generator appropriate to this Global Generator
cmLocalGenerator *cmGlobalUnixMakefileGenerator3::CreateLocalGenerator()
{
  cmLocalGenerator* lg = new cmLocalUnixMakefileGenerator3;
  lg->SetGlobalGenerator(this);
  return lg;
}

//----------------------------------------------------------------------------
void cmGlobalUnixMakefileGenerator3::GetDocumentation(cmDocumentationEntry& entry) const
{
  entry.name = this->GetName();
  entry.brief = "Generates standard UNIX makefiles.";
  entry.full =
    "A hierarchy of UNIX makefiles is generated into the build tree.  Any "
    "standard UNIX-style make program can build the project through the "
    "default make target.  A \"make install\" target is also provided.";
}

//----------------------------------------------------------------------------
void
cmGlobalUnixMakefileGenerator3
::AddMultipleOutputPair(const char* depender, const char* dependee)
{
  MultipleOutputPairsType::value_type p(depender, dependee);
  this->MultipleOutputPairs.insert(p);
}

//----------------------------------------------------------------------------
void cmGlobalUnixMakefileGenerator3::Generate() 
{
  // first do superclass method
  this->cmGlobalGenerator::Generate();

  // write the main makefile
  this->WriteMainMakefile2();
  this->WriteMainCMakefile();
}

void cmGlobalUnixMakefileGenerator3::WriteMainMakefile2()
{
  // Open the output file.  This should not be copy-if-different
  // because the check-build-system step compares the makefile time to
  // see if the build system must be regenerated.
  std::string makefileName = 
    this->GetCMakeInstance()->GetHomeOutputDirectory();
  makefileName += "/CMakeFiles/Makefile2";
  cmGeneratedFileStream makefileStream(makefileName.c_str());
  if(!makefileStream)
    {
    return;
    }
 
  // get a local generator for some useful methods
  cmLocalUnixMakefileGenerator3 *lg = 
    static_cast<cmLocalUnixMakefileGenerator3 *>(this->LocalGenerators[0]);
    
  // Write the do not edit header.
  lg->WriteDisclaimer(makefileStream);

  // Write the main entry point target.  This must be the VERY first
  // target so that make with no arguments will run it.
  // Just depend on the all target to drive the build.
  std::vector<std::string> depends;
  std::vector<std::string> no_commands;
  depends.push_back("all");

  // Write the rule.
  lg->WriteMakeRule(makefileStream,
                    "Default target executed when no arguments are "
                    "given to make.",
                    "default_target",
                    depends,
                    no_commands, true);

  depends.clear();

  // The all and preinstall rules might never have any dependencies
  // added to them.
  if(this->EmptyRuleHackDepends != "")
    {
    depends.push_back(this->EmptyRuleHackDepends);
    }

  // Write and empty all:
  lg->WriteMakeRule(makefileStream, 
                    "The main recursive all target", "all", 
                    depends, no_commands, true);

  // Write an empty preinstall:
  lg->WriteMakeRule(makefileStream,
                    "The main recursive preinstall target", "preinstall",
                    depends, no_commands, true);

  lg->WriteMakeVariables(makefileStream);

  // Write out the "special" stuff
  lg->WriteSpecialTargetsTop(makefileStream);
  
  // write the target convenience rules
  unsigned int i;
  for (i = 0; i < this->LocalGenerators.size(); ++i)
    {
    lg = static_cast<cmLocalUnixMakefileGenerator3 *>(this->LocalGenerators[i]);
    // are any parents excluded
    bool exclude = false;
    cmLocalGenerator *lg3 = lg;
    while (lg3)
      {
      if (lg3->GetExcludeAll())
        {
        exclude = true;
        break;
        }
      lg3 = lg3->GetParent();
      }
    this->WriteConvenienceRules2(makefileStream,lg,exclude);
    }

  lg = static_cast<cmLocalUnixMakefileGenerator3 *>(this->LocalGenerators[0]);
  lg->WriteSpecialTargetsBottom(makefileStream);
}


//----------------------------------------------------------------------------
void cmGlobalUnixMakefileGenerator3::WriteMainCMakefile()
{
  // Open the output file.  This should not be copy-if-different
  // because the check-build-system step compares the makefile time to
  // see if the build system must be regenerated.
  std::string cmakefileName = 
    this->GetCMakeInstance()->GetHomeOutputDirectory();
  cmakefileName += "/CMakeFiles/Makefile.cmake";
  cmGeneratedFileStream cmakefileStream(cmakefileName.c_str());
  if(!cmakefileStream)
    {
    return;
    }

  std::string makefileName = 
    this->GetCMakeInstance()->GetHomeOutputDirectory();
  makefileName += "/Makefile";
  
  // get a local generator for some useful methods
  cmLocalUnixMakefileGenerator3 *lg = 
    static_cast<cmLocalUnixMakefileGenerator3 *>(this->LocalGenerators[0]);
    
  // Write the do not edit header.
  lg->WriteDisclaimer(cmakefileStream);

  // Save the generator name
  cmakefileStream
    << "# The generator used is:\n"
    << "SET(CMAKE_DEPENDS_GENERATOR \"" << this->GetName() << "\")\n\n";

  // for each cmMakefile get its list of dependencies
  std::vector<std::string> lfiles;
  for (unsigned int i = 0; i < this->LocalGenerators.size(); ++i)
    {
    lg = static_cast<cmLocalUnixMakefileGenerator3 *>(this->LocalGenerators[i]);
  
    // Get the list of files contributing to this generation step.
    lfiles.insert(lfiles.end(),lg->GetMakefile()->GetListFiles().begin(),
                  lg->GetMakefile()->GetListFiles().end());
    }
  // Sort the list and remove duplicates.
  std::sort(lfiles.begin(), lfiles.end(), std::less<std::string>());
  std::vector<std::string>::iterator new_end = 
    std::unique(lfiles.begin(),lfiles.end());
  lfiles.erase(new_end, lfiles.end());

  // reset lg to the first makefile
  lg = static_cast<cmLocalUnixMakefileGenerator3 *>(this->LocalGenerators[0]);

  // Build the path to the cache file.
  std::string cache = this->GetCMakeInstance()->GetHomeOutputDirectory();
  cache += "/CMakeCache.txt";

  // Save the list to the cmake file.
  cmakefileStream
    << "# The top level Makefile was generated from the following files:\n"
    << "SET(CMAKE_MAKEFILE_DEPENDS\n"
    << "  \"" << lg->Convert(cache.c_str(),
                             cmLocalGenerator::START_OUTPUT).c_str() << "\"\n";
  for(std::vector<std::string>::const_iterator i = lfiles.begin();
      i !=  lfiles.end(); ++i)
    {
    cmakefileStream
      << "  \"" << lg->Convert(i->c_str(),
                               cmLocalGenerator::START_OUTPUT).c_str()
      << "\"\n";
    }
  cmakefileStream
    << "  )\n\n";

  // Build the path to the cache check file.
  std::string check = this->GetCMakeInstance()->GetHomeOutputDirectory();
  check += "/CMakeFiles/cmake.check_cache";

  // Set the corresponding makefile in the cmake file.
  cmakefileStream
    << "# The corresponding makefile is:\n"
    << "SET(CMAKE_MAKEFILE_OUTPUTS\n"
    << "  \"" << lg->Convert(makefileName.c_str(),
                             cmLocalGenerator::START_OUTPUT).c_str() << "\"\n"
    << "  \"" << lg->Convert(check.c_str(),
                             cmLocalGenerator::START_OUTPUT).c_str() << "\"\n";

  // add in all the directory information files
  std::string tmpStr;
  for (unsigned int i = 0; i < this->LocalGenerators.size(); ++i)
    {
    lg = static_cast<cmLocalUnixMakefileGenerator3 *>(this->LocalGenerators[i]);
    tmpStr = lg->GetMakefile()->GetStartOutputDirectory();
    tmpStr += "/CMakeFiles/CMakeDirectoryInformation.cmake";
    cmakefileStream << "  \"" << 
      lg->Convert(tmpStr.c_str(),cmLocalGenerator::HOME_OUTPUT).c_str() << "\"\n";
    const std::vector<std::string>& outfiles = lg->GetMakefile()->GetOutputFiles();
    for(std::vector<std::string>::const_iterator k= outfiles.begin();
        k != outfiles.end(); ++k)
      {
      cmakefileStream << "  \"" << 
        lg->Convert(k->c_str(),cmLocalGenerator::HOME_OUTPUT).c_str() << "\"\n";
      }
    }
  cmakefileStream << "  )\n\n";

  this->WriteMainCMakefileLanguageRules(cmakefileStream, this->LocalGenerators);

  if(!this->MultipleOutputPairs.empty())
    {
    cmakefileStream
      << "\n"
      << "SET(CMAKE_MULTIPLE_OUTPUT_PAIRS\n";
    for(MultipleOutputPairsType::const_iterator pi =
          this->MultipleOutputPairs.begin();
        pi != this->MultipleOutputPairs.end(); ++pi)
      {
      cmakefileStream << "  \"" << pi->first << "\" \""
                      << pi->second << "\"\n";
      }
    cmakefileStream << "  )\n\n";
    }
}

//----------------------------------------------------------------------------
void cmGlobalUnixMakefileGenerator3::CheckMultipleOutputs(cmMakefile* mf,
                                                          bool verbose)
{
  // Get the string listing the multiple output pairs.
  const char* pairs_string = mf->GetDefinition("CMAKE_MULTIPLE_OUTPUT_PAIRS");
  if(!pairs_string)
    {
    return;
    }

  // Convert the string to a list and preserve empty entries.
  std::vector<std::string> pairs;
  cmSystemTools::ExpandListArgument(pairs_string, pairs, true);
  for(std::vector<std::string>::const_iterator i = pairs.begin();
      i != pairs.end(); ++i)
    {
    const std::string& depender = *i;
    if(++i != pairs.end())
      {
      const std::string& dependee = *i;

      // If the depender is missing then delete the dependee to make
      // sure both will be regenerated.
      if(cmSystemTools::FileExists(dependee.c_str()) &&
         !cmSystemTools::FileExists(depender.c_str()))
        {
        if(verbose)
          {
          cmOStringStream msg;
          msg << "Deleting primary custom command output \"" << dependee
              << "\" because another output \""
              << depender << "\" does not exist." << std::endl;
          cmSystemTools::Stdout(msg.str().c_str());
          }
        cmSystemTools::RemoveFile(dependee.c_str());
        }
      }
    }
}

void cmGlobalUnixMakefileGenerator3
::WriteMainCMakefileLanguageRules(cmGeneratedFileStream& cmakefileStream,
                                  std::vector<cmLocalGenerator *> &lGenerators)
{
  cmLocalUnixMakefileGenerator3 *lg;

  // now list all the target info files
  cmakefileStream
    << "# The set of files whose dependency integrity should be checked:\n";
  cmakefileStream
    << "SET(CMAKE_DEPEND_INFO_FILES\n";
  for (unsigned int i = 0; i < lGenerators.size(); ++i)
    {
    lg = static_cast<cmLocalUnixMakefileGenerator3 *>(lGenerators[i]);
    // for all of out targets
    for (cmTargets::iterator l = lg->GetMakefile()->GetTargets().begin();
         l != lg->GetMakefile()->GetTargets().end(); l++)
      {
      if((l->second.GetType() == cmTarget::EXECUTABLE) ||
         (l->second.GetType() == cmTarget::STATIC_LIBRARY) ||
         (l->second.GetType() == cmTarget::SHARED_LIBRARY) ||
         (l->second.GetType() == cmTarget::MODULE_LIBRARY) )
        {
        std::string tname = lg->GetRelativeTargetDirectory(l->second);
        tname += "/DependInfo.cmake";
        cmSystemTools::ConvertToUnixSlashes(tname);
        cmakefileStream << "  \"" << tname.c_str() << "\"\n";
        }
      }
    }
  cmakefileStream << "  )\n";
}

//----------------------------------------------------------------------------
void
cmGlobalUnixMakefileGenerator3
::WriteDirectoryRule2(std::ostream& ruleFileStream,
                      cmLocalUnixMakefileGenerator3* lg,
                      const char* pass, bool check_all,
                      bool check_relink)
{
  // Get the relative path to the subdirectory from the top.
  std::string makeTarget = lg->GetMakefile()->GetStartOutputDirectory();
  makeTarget += "/";
  makeTarget += pass;
  makeTarget = lg->Convert(makeTarget.c_str(),
                           cmLocalGenerator::HOME_OUTPUT,
                           cmLocalGenerator::MAKEFILE);

  // The directory-level rule should depend on the target-level rules
  // for all targets in the directory.
  std::vector<std::string> depends;
  for(cmTargets::iterator l = lg->GetMakefile()->GetTargets().begin();
      l != lg->GetMakefile()->GetTargets().end(); ++l)
    {
    if((l->second.GetType() == cmTarget::EXECUTABLE) ||
       (l->second.GetType() == cmTarget::STATIC_LIBRARY) ||
       (l->second.GetType() == cmTarget::SHARED_LIBRARY) ||
       (l->second.GetType() == cmTarget::MODULE_LIBRARY) ||
       (l->second.GetType() == cmTarget::UTILITY))
      {
      // Add this to the list of depends rules in this directory.
      if((!check_all || l->second.IsInAll()) &&
         (!check_relink || l->second.NeedRelinkBeforeInstall()))
        {
        std::string tname = lg->GetRelativeTargetDirectory(l->second);
        tname += "/";
        tname += pass;
        depends.push_back(tname);
        }
      }
    }

  // The directory-level rule should depend on the directory-level
  // rules of the subdirectories.
  for(std::vector<cmLocalGenerator*>::iterator sdi = lg->GetChildren().begin();
      sdi != lg->GetChildren().end(); ++sdi)
    {
    cmLocalUnixMakefileGenerator3* slg =
      static_cast<cmLocalUnixMakefileGenerator3*>(*sdi);
    std::string subdir = slg->GetMakefile()->GetStartOutputDirectory();
    subdir += "/";
    subdir += pass;
    subdir = slg->Convert(subdir.c_str(),
                          cmLocalGenerator::HOME_OUTPUT,
                          cmLocalGenerator::MAKEFILE);
    depends.push_back(subdir);
    }

  // Work-around for makes that drop rules that have no dependencies
  // or commands.
  if(depends.empty() && this->EmptyRuleHackDepends != "")
    {
    depends.push_back(this->EmptyRuleHackDepends);
    }

  // Write the rule.
  std::string doc = "Convenience name for \"";
  doc += pass;
  doc += "\" pass in the directory.";
  std::vector<std::string> no_commands;
  lg->WriteMakeRule(ruleFileStream, doc.c_str(),
                    makeTarget.c_str(), depends, no_commands, true);
}

//----------------------------------------------------------------------------
void
cmGlobalUnixMakefileGenerator3
::WriteDirectoryRules2(std::ostream& ruleFileStream,
                       cmLocalUnixMakefileGenerator3* lg)
{
  // Only subdirectories need these rules.
  if(!lg->GetParent())
    {
    return;
    }

  // Begin the directory-level rules section.
  std::string dir = lg->GetMakefile()->GetStartOutputDirectory();
  dir = lg->Convert(dir.c_str(), cmLocalGenerator::HOME_OUTPUT,
                    cmLocalGenerator::MAKEFILE);
  lg->WriteDivider(ruleFileStream);
  ruleFileStream
    << "# Directory level rules for directory "
    << dir << "\n\n";

  // Write directory-level rules for "all".
  this->WriteDirectoryRule2(ruleFileStream, lg, "all", true, false);

  // Write directory-level rules for "clean".
  this->WriteDirectoryRule2(ruleFileStream, lg, "clean", false, false);

  // Write directory-level rules for "preinstall".
  this->WriteDirectoryRule2(ruleFileStream, lg, "preinstall", false, true);
}

//----------------------------------------------------------------------------
void
cmGlobalUnixMakefileGenerator3
::WriteConvenienceRules(std::ostream& ruleFileStream, 
                        std::set<cmStdString> &emitted)
{
  std::vector<std::string> depends;  
  std::vector<std::string> commands;

  depends.push_back("cmake_check_build_system");
  
  // write the target convenience rules
  unsigned int i;
  cmLocalUnixMakefileGenerator3 *lg;
  for (i = 0; i < this->LocalGenerators.size(); ++i)
    {
    lg = static_cast<cmLocalUnixMakefileGenerator3 *>(this->LocalGenerators[i]);
    // for each target Generate the rule files for each target.
    cmTargets& targets = lg->GetMakefile()->GetTargets();
    for(cmTargets::iterator t = targets.begin(); t != targets.end(); ++t)
      {
      if((t->second.GetType() == cmTarget::EXECUTABLE) ||
         (t->second.GetType() == cmTarget::STATIC_LIBRARY) ||
         (t->second.GetType() == cmTarget::SHARED_LIBRARY) ||
         (t->second.GetType() == cmTarget::MODULE_LIBRARY) ||
         (t->second.GetType() == cmTarget::UTILITY))
        {
        // Don't emit the same rule twice (e.g. two targets with the same
        // simple name)
        if(t->second.GetName() &&
           strlen(t->second.GetName()) &&
           emitted.insert(t->second.GetName()).second)
          {
          // Add a rule to build the target by name.
          lg->WriteDivider(ruleFileStream);
          ruleFileStream
            << "# Target rules for targets named "
            << t->second.GetName() << "\n\n";
          
          // Write the rule.
          commands.clear();
          commands.push_back(lg->GetRecursiveMakeCall
                             ("CMakeFiles/Makefile2",t->second.GetName()));
          depends.clear(); 
          depends.push_back("cmake_check_build_system");
          lg->WriteMakeRule(ruleFileStream, 
                            "Build rule for target.",
                            t->second.GetName(), depends, commands,
                            true);
          }
        }
      }
    }
}


//----------------------------------------------------------------------------
void
cmGlobalUnixMakefileGenerator3
::WriteConvenienceRules2(std::ostream& ruleFileStream, 
                         cmLocalUnixMakefileGenerator3 *lg,
                         bool exclude)
{
  std::vector<std::string> depends;  
  std::vector<std::string> commands;
  std::string localName;
  std::string makeTargetName;

  // write the directory level rules for this local gen
  this->WriteDirectoryRules2(ruleFileStream,lg);
  
  depends.push_back("cmake_check_build_system");

  // for each target Generate the rule files for each target.
  cmTargets& targets = lg->GetMakefile()->GetTargets();
  for(cmTargets::iterator t = targets.begin(); t != targets.end(); ++t)
    {
    if (((t->second.GetType() == cmTarget::EXECUTABLE) ||
         (t->second.GetType() == cmTarget::STATIC_LIBRARY) ||
         (t->second.GetType() == cmTarget::SHARED_LIBRARY) ||
         (t->second.GetType() == cmTarget::MODULE_LIBRARY) ||
         (t->second.GetType() == cmTarget::UTILITY)) &&
        t->second.GetName() &&
        strlen(t->second.GetName()))  
      {
      bool needRequiresStep = 
        this->NeedRequiresStep(lg,t->second.GetName());
      // Add a rule to build the target by name.
      localName = lg->GetRelativeTargetDirectory(t->second);
      std::string makefileName = localName;
      makefileName += "/build.make";
      
      lg->WriteDivider(ruleFileStream);
      ruleFileStream
        << "# Target rules for target "
        << localName << "\n\n";
      
      commands.clear();
      if (t->second.GetType() != cmTarget::UTILITY)
        {
        makeTargetName = localName;
        makeTargetName += "/depend";
        commands.push_back(lg->GetRecursiveMakeCall
                           (makefileName.c_str(),makeTargetName.c_str()));
        
        // add requires if we need it for this generator
        if (needRequiresStep)
          {
          makeTargetName = localName;
          makeTargetName += "/requires";
          commands.push_back(lg->GetRecursiveMakeCall
                             (makefileName.c_str(),makeTargetName.c_str()));
          }
        }
      makeTargetName = localName;
      makeTargetName += "/build";
      commands.push_back(lg->GetRecursiveMakeCall
                         (makefileName.c_str(),makeTargetName.c_str()));

      // Write the rule.
      localName += "/all";
      depends.clear();
      this->AppendGlobalTargetDepends(depends,t->second);
      lg->WriteMakeRule(ruleFileStream, "All Build rule for target.",
                        localName.c_str(), depends, commands, true);

      // add the all/all dependency
      if (!exclude && t->second.IsInAll())
        {
        depends.clear();
        depends.push_back(localName);
        commands.clear();
        lg->WriteMakeRule(ruleFileStream, "Include target in all.",
                          "all", depends, commands, true);
        }

      // Write the rule.
      commands.clear();
      commands.push_back(lg->GetRecursiveMakeCall
                         ("CMakeFiles/Makefile2",localName.c_str()));
      depends.clear();
      depends.push_back("cmake_check_build_system");
      localName = lg->GetRelativeTargetDirectory(t->second);
      localName += "/rule";
      lg->WriteMakeRule(ruleFileStream, 
                        "Build rule for subdir invocation for target.",
                        localName.c_str(), depends, commands, true);

      // Add a target with the canonical name (no prefix, suffix or path).
      commands.clear();
      depends.clear();
      depends.push_back(localName);
      lg->WriteMakeRule(ruleFileStream, "Convenience name for target.",
                        t->second.GetName(), depends, commands, true);

      // Add rules to prepare the target for installation.
      if(t->second.NeedRelinkBeforeInstall())
        {
        localName = lg->GetRelativeTargetDirectory(t->second);
        localName += "/preinstall";
        depends.clear();
        commands.clear();
        commands.push_back(lg->GetRecursiveMakeCall
                           (makefileName.c_str(), localName.c_str()));
        this->AppendGlobalTargetDepends(depends,t->second);
        lg->WriteMakeRule(ruleFileStream, "Pre-install relink rule for target.",
                          localName.c_str(), depends, commands, true);
        depends.clear();
        depends.push_back(localName);
        commands.clear();
        lg->WriteMakeRule(ruleFileStream, "Prepare target for install.",
                          "preinstall", depends, commands, true);
        }

      // add the clean rule
      localName = lg->GetRelativeTargetDirectory(t->second);
      makeTargetName = localName;
      makeTargetName += "/clean";
      depends.clear();
      commands.clear();
      commands.push_back(lg->GetRecursiveMakeCall
                         (makefileName.c_str(), makeTargetName.c_str()));
      lg->WriteMakeRule(ruleFileStream, "clean rule for target.",
                        makeTargetName.c_str(), depends, commands, true);
      commands.clear();
      depends.push_back(makeTargetName);
      lg->WriteMakeRule(ruleFileStream, "clean rule for target.",
                        "clean", depends, commands, true);
      }
    }
}


//----------------------------------------------------------------------------
void
cmGlobalUnixMakefileGenerator3
::AppendGlobalTargetDepends(std::vector<std::string>& depends,
                            cmTarget& target)
{
  // Keep track of dependencies already listed.
  std::set<cmStdString> emitted;

  // A target should not depend on itself.
  emitted.insert(target.GetName());
  
  // Loop over all library dependencies but not for static libs
  if (target.GetType() != cmTarget::STATIC_LIBRARY)
    {
    const cmTarget::LinkLibraryVectorType& tlibs = target.GetLinkLibraries();
    for(cmTarget::LinkLibraryVectorType::const_iterator lib = tlibs.begin();
        lib != tlibs.end(); ++lib)
      {
      // Don't emit the same library twice for this target.
      if(emitted.insert(lib->first).second)
        {
        // Add this dependency.
        this->AppendAnyGlobalDepend(depends, lib->first.c_str(), 
                                    emitted, target);
        }
      }
    }
  
  // Loop over all utility dependencies.
  const std::set<cmStdString>& tutils = target.GetUtilities();
  for(std::set<cmStdString>::const_iterator util = tutils.begin();
      util != tutils.end(); ++util)
    {
    // Don't emit the same utility twice for this target.
    if(emitted.insert(*util).second)
      {
      // Add this dependency.
      this->AppendAnyGlobalDepend(depends, util->c_str(), emitted, target);
      }
    }
}


//----------------------------------------------------------------------------
void
cmGlobalUnixMakefileGenerator3
::AppendAnyGlobalDepend(std::vector<std::string>& depends, const char* name,
                        std::set<cmStdString>& emitted, cmTarget &target)
{
  cmTarget *result;
  cmLocalUnixMakefileGenerator3 *lg3;
 
  // first check the same dir as the current target
  lg3 = static_cast<cmLocalUnixMakefileGenerator3 *>
    (target.GetMakefile()->GetLocalGenerator());
  result = target.GetMakefile()->FindTarget(name);
  
  // search each local generator until a match is found
  if (!result)
    {
    unsigned int i;
    for (i = 0; i < this->LocalGenerators.size(); ++i)
      {
      // search all targets
      result = this->LocalGenerators[i]->GetMakefile()->FindTarget(name);
      if (result)
        {
        lg3 = static_cast<cmLocalUnixMakefileGenerator3 *>
          (this->LocalGenerators[i]);
        break;
        }
      }
    }
  
  // if a match was found then ...
  if (result)
    {
    std::string tgtName = lg3->GetRelativeTargetDirectory(*result);
    tgtName += "/all";
    depends.push_back(tgtName);
    if(result->GetType() == cmTarget::STATIC_LIBRARY)
      {
      const cmTarget::LinkLibraryVectorType& tlibs 
        = result->GetLinkLibraries();
      for(cmTarget::LinkLibraryVectorType::const_iterator lib = tlibs.begin();
          lib != tlibs.end(); ++lib)
        {
        // Don't emit the same library twice for this target.
        if(emitted.insert(lib->first).second)
          {
          // Add this dependency.
          this->AppendAnyGlobalDepend(depends, lib->first.c_str(),
                                      emitted, *result);
          }
        }
      }
    return;
    }
}

//----------------------------------------------------------------------------
void cmGlobalUnixMakefileGenerator3::WriteHelpRule
(std::ostream& ruleFileStream, cmLocalUnixMakefileGenerator3 *lg)
{
  // add the help target
  std::string path;
  std::vector<std::string> no_depends;
  std::vector<std::string> commands;
  lg->AppendEcho(commands,
                 "The following are some of the valid targets for this Makefile:");
  lg->AppendEcho(commands,"... all (the default if no target is provided)");
  lg->AppendEcho(commands,"... clean");
  lg->AppendEcho(commands,"... depend");
  lg->AppendEcho(commands,"... install");
  lg->AppendEcho(commands,"... rebuild_cache");
  
  // Keep track of targets already listed.
  std::set<cmStdString> emittedTargets;

  // for each local generator
  unsigned int i;
  cmLocalUnixMakefileGenerator3 *lg2;
  for (i = 0; i < this->LocalGenerators.size(); ++i)
    {
    lg2 = static_cast<cmLocalUnixMakefileGenerator3 *>(this->LocalGenerators[i]);
    // for the passed in makefile or if this is the top Makefile wripte out
    // the targets
    if (lg2 == lg || !lg->GetParent())
      {
      // for each target Generate the rule files for each target.
      cmTargets& targets = lg->GetMakefile()->GetTargets();
      for(cmTargets::iterator t = targets.begin(); t != targets.end(); ++t)
        {
        if((t->second.GetType() == cmTarget::EXECUTABLE) ||
           (t->second.GetType() == cmTarget::STATIC_LIBRARY) ||
           (t->second.GetType() == cmTarget::SHARED_LIBRARY) ||
           (t->second.GetType() == cmTarget::MODULE_LIBRARY) ||
           (t->second.GetType() == cmTarget::UTILITY))
          {
          if(emittedTargets.insert(t->second.GetName()).second)
            {
            path = "... ";
            path += t->second.GetName();
            lg->AppendEcho(commands,path.c_str());
            }
          }
        }
      std::map<cmStdString,std::vector<cmTarget *> > const& objs =
        lg->GetLocalObjectFiles();
      for(std::map<cmStdString,std::vector<cmTarget *> >::const_iterator o =
            objs.begin(); o != objs.end(); ++o)
        {
         path = "... ";
         path += o->first;
         lg->AppendEcho(commands, path.c_str());
        }
      }
    }
  lg->WriteMakeRule(ruleFileStream, "Help Target",
                    "help:",
                    no_depends, commands, true);
  ruleFileStream << "\n\n";
}


bool cmGlobalUnixMakefileGenerator3
::NeedRequiresStep(cmLocalUnixMakefileGenerator3 *lg,const char *name)
{
  std::map<cmStdString,cmLocalUnixMakefileGenerator3::IntegrityCheckSet>& 
    checkSet = lg->GetIntegrityCheckSet()[name];
  for(std::map<cmStdString, 
        cmLocalUnixMakefileGenerator3::IntegrityCheckSet>::const_iterator
        l = checkSet.begin(); l != checkSet.end(); ++l)
    {
    std::string name2 = "CMAKE_NEEDS_REQUIRES_STEP_";
    name2 += l->first;
    name2 += "_FLAG";
    if(lg->GetMakefile()->GetDefinition(name2.c_str()))
      {
      return true;
      }
    }
  return false;
}
