cmLocalGenerator.cxx

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

  Program:   CMake - Cross-Platform Makefile Generator
  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 "cmLocalGenerator.h"

#include "cmComputeLinkInformation.h"
#include "cmGeneratedFileStream.h"
#include "cmGlobalGenerator.h"
#include "cmInstallGenerator.h"
#include "cmInstallFilesGenerator.h"
#include "cmInstallScriptGenerator.h"
#include "cmInstallTargetGenerator.h"
#include "cmMakefile.h"
#include "cmSourceFile.h"
#include "cmTest.h"
#include "cmake.h"

#if defined(CMAKE_BUILD_WITH_CMAKE)
# define CM_LG_ENCODE_OBJECT_NAMES
# include <cmsys/MD5.h>
#endif

#include <cmsys/System.h>

#include <ctype.h> // for isalpha

#include <assert.h>

cmLocalGenerator::cmLocalGenerator()
{
  this->Makefile = new cmMakefile;
  this->Makefile->SetLocalGenerator(this);
  this->Parent = 0;
  this->WindowsShell = false;
  this->WindowsVSIDE = false;
  this->WatcomWMake = false;
  this->MinGWMake = false;
  this->NMake = false;
  this->MSYSShell = false;
  this->LinkScriptShell = false;
  this->IgnoreLibPrefix = false;
  this->UseRelativePaths = false;
  this->Configured = false;
  this->EmitUniversalBinaryFlags = true;
  this->IsMakefileGenerator = false;
  this->RelativePathsConfigured = false;
  this->PathConversionsSetup = false;
  this->BackwardsCompatibility = 0;
  this->BackwardsCompatibilityFinal = false;
}

cmLocalGenerator::~cmLocalGenerator()
{
  delete this->Makefile;
}

void cmLocalGenerator::Configure()
{
  cmLocalGenerator* previousLg = 
                        this->GetGlobalGenerator()->GetCurrentLocalGenerator();
  this->GetGlobalGenerator()->SetCurrentLocalGenerator(this);

  // make sure the CMakeFiles dir is there
  std::string filesDir = this->Makefile->GetStartOutputDirectory();
  filesDir += cmake::GetCMakeFilesDirectory();
  cmSystemTools::MakeDirectory(filesDir.c_str());
  
  // find & read the list file
  std::string currentStart = this->Makefile->GetStartDirectory();
  currentStart += "/CMakeLists.txt";
  this->Makefile->ReadListFile(currentStart.c_str());

  // at the end of the ReadListFile handle any old style subdirs
  // first get all the subdirectories
  std::vector<cmLocalGenerator *> subdirs = this->GetChildren();
  
  // for each subdir recurse
  std::vector<cmLocalGenerator *>::iterator sdi = subdirs.begin();
  for (; sdi != subdirs.end(); ++sdi)
    {
    if (!(*sdi)->Configured)
      {
      this->Makefile->ConfigureSubDirectory(*sdi);
      }
    }  

  // Check whether relative paths should be used for optionally
  // relative paths.
  this->UseRelativePaths = this->Makefile->IsOn("CMAKE_USE_RELATIVE_PATHS");

  // Choose a maximum object file name length.
  {
#if defined(_WIN32) || defined(__CYGWIN__)
  this->ObjectPathMax = 250;
#else
  this->ObjectPathMax = 1000;
#endif
  const char* plen = this->Makefile->GetDefinition("CMAKE_OBJECT_PATH_MAX");
  if(plen && *plen)
    {
    unsigned int pmax;
    if(sscanf(plen, "%u", &pmax) == 1)
      {
      if(pmax >= 128)
        {
        this->ObjectPathMax = pmax;
        }
      else
        {
        cmOStringStream w;
        w << "CMAKE_OBJECT_PATH_MAX is set to " << pmax
          << ", which is less than the minimum of 128.  "
          << "The value will be ignored.";
        this->Makefile->IssueMessage(cmake::AUTHOR_WARNING, w.str());
        }
      }
    else
      {
      cmOStringStream w;
      w << "CMAKE_OBJECT_PATH_MAX is set to \"" << plen
        << "\", which fails to parse as a positive integer.  "
        << "The value will be ignored.";
      this->Makefile->IssueMessage(cmake::AUTHOR_WARNING, w.str());
      }
    }
  this->ObjectMaxPathViolations.clear();
  }

  this->Configured = true;

  this->GetGlobalGenerator()->SetCurrentLocalGenerator(previousLg);
}

void cmLocalGenerator::SetupPathConversions()
{  
  // Setup the current output directory components for use by
  // Convert
  std::string outdir; 
  outdir =
    cmSystemTools::CollapseFullPath(this->Makefile->GetHomeDirectory());
  cmSystemTools::SplitPath(outdir.c_str(), this->HomeDirectoryComponents);
  outdir =
    cmSystemTools::CollapseFullPath(this->Makefile->GetStartDirectory());
  cmSystemTools::SplitPath(outdir.c_str(), this->StartDirectoryComponents);

  outdir = cmSystemTools::CollapseFullPath
    (this->Makefile->GetHomeOutputDirectory());
  cmSystemTools::SplitPath(outdir.c_str(), 
                           this->HomeOutputDirectoryComponents);

  outdir = cmSystemTools::CollapseFullPath
    (this->Makefile->GetStartOutputDirectory());
  cmSystemTools::SplitPath(outdir.c_str(), 
                           this->StartOutputDirectoryComponents);
}


void cmLocalGenerator::SetGlobalGenerator(cmGlobalGenerator *gg)
{
  this->GlobalGenerator = gg;

  // setup the home directories
  this->Makefile->GetProperties().SetCMakeInstance(gg->GetCMakeInstance());
  this->Makefile->SetHomeDirectory(
    gg->GetCMakeInstance()->GetHomeDirectory());
  this->Makefile->SetHomeOutputDirectory(
    gg->GetCMakeInstance()->GetHomeOutputDirectory());
}

void cmLocalGenerator::ConfigureFinalPass()
{
  this->Makefile->ConfigureFinalPass();
}

void cmLocalGenerator::TraceDependencies()
{
  // Generate the rule files for each target.
  cmTargets& targets = this->Makefile->GetTargets();
  for(cmTargets::iterator t = targets.begin(); t != targets.end(); ++t)
    {
    // INCLUDE_EXTERNAL_MSPROJECT command only affects the workspace
    // so don't build a projectfile for it
    if (strncmp(t->first.c_str(), "INCLUDE_EXTERNAL_MSPROJECT", 26) != 0)
      {
      const char* projectFilename = 0;
      if (this->IsMakefileGenerator == false)  // only use of this variable
        {
        projectFilename = t->second.GetName();
        }
      t->second.TraceDependencies(projectFilename);
      }
    }
}

void cmLocalGenerator::GenerateTestFiles()
{
  if ( !this->Makefile->IsOn("CMAKE_TESTING_ENABLED") )
    {
    return;
    }
  std::string file = this->Makefile->GetStartOutputDirectory();
  file += "/";
  file += "CTestTestfile.cmake";

  cmGeneratedFileStream fout(file.c_str());
  fout.SetCopyIfDifferent(true);

  fout << "# CMake generated Testfile for " << std::endl
       << "# Source directory: " 
       << this->Makefile->GetStartDirectory() << std::endl
       << "# Build directory: " 
       << this->Makefile->GetStartOutputDirectory() << std::endl
       << "# " << std::endl
       << "# This file replicates the SUBDIRS() and ADD_TEST() commands "
       << "from the source" << std::endl
       << "# tree CMakeLists.txt file, skipping any SUBDIRS() or "
       << "ADD_TEST() commands" << std::endl
       << "# that are excluded by CMake control structures, i.e. IF() "
       << "commands." << std::endl;
  
  const char* testIncludeFile = 
    this->Makefile->GetProperty("TEST_INCLUDE_FILE");
  if ( testIncludeFile )
    {
    fout << "INCLUDE(\"" << testIncludeFile << "\")" << std::endl;
    }
  
  const std::vector<cmTest*> *tests = this->Makefile->GetTests();
  std::vector<cmTest*>::const_iterator it;
  for ( it = tests->begin(); it != tests->end(); ++ it )
    {
    cmTest* test = *it;
    fout << "ADD_TEST(";
    fout << test->GetName() << " \"" << test->GetCommand() << "\"";
    
    std::vector<cmStdString>::const_iterator argit;
    for (argit = test->GetArguments().begin();
         argit != test->GetArguments().end(); ++argit)
      {
      // Just double-quote all arguments so they are re-parsed
      // correctly by the test system.
      fout << " \"";
      for(std::string::const_iterator c = argit->begin(); 
          c != argit->end(); ++c)
        {
        // Escape quotes within arguments.  We should escape
        // backslashes too but we cannot because it makes the result
        // inconsistent with previous behavior of this command.
        if((*c == '"'))
          {
          fout << '\\';
          }
        fout << *c;
        }
      fout << "\"";
      }
    fout << ")" << std::endl;
    cmPropertyMap::const_iterator pit;
    cmPropertyMap* mpit = &test->GetProperties();
    if ( mpit->size() )
      {
      fout << "SET_TESTS_PROPERTIES(" << test->GetName() << " PROPERTIES ";
      for ( pit = mpit->begin(); pit != mpit->end(); ++ pit )
        {
        fout << " " << pit->first.c_str() << " \"";
        const char* value = pit->second.GetValue();
        for ( ; *value; ++ value )
          {
          switch ( *value )
            {
          case '\\':
          case '"':
          case ' ':
          case '#':
          case '(':
          case ')':
          case '$':
          case '^':
            fout << "\\" << *value;
            break;
          case '\t':
            fout << "\\t";
            break;
          case '\n':
            fout << "\\n";
            break;
          case '\r':
            fout << "\\r";
            break;
          default:
            fout << *value;
            }
          }
        fout << "\"";
        }
      fout << ")" << std::endl;
      }
    }
  if ( this->Children.size())
    {
    size_t i;
    for(i = 0; i < this->Children.size(); ++i)
      {
      fout << "SUBDIRS(";
      std::string outP = 
        this->Children[i]->GetMakefile()->GetStartOutputDirectory();
      fout << this->Convert(outP.c_str(),START_OUTPUT);
      fout << ")" << std::endl;
      }
    }
}

//----------------------------------------------------------------------------
void cmLocalGenerator::GenerateInstallRules()
{
  // Compute the install prefix.
  const char* prefix = this->Makefile->GetDefinition("CMAKE_INSTALL_PREFIX");
#if defined(_WIN32) && !defined(__CYGWIN__)
  std::string prefix_win32;
  if(!prefix)
    {
    if(!cmSystemTools::GetEnv("SystemDrive", prefix_win32))
      {
      prefix_win32 = "C:";
      }
    const char* project_name = this->Makefile->GetDefinition("PROJECT_NAME");
    if(project_name && project_name[0])
      {
      prefix_win32 += "/Program Files/";
      prefix_win32 += project_name;
      }
    else
      {
      prefix_win32 += "/InstalledCMakeProject";
      }
    prefix = prefix_win32.c_str();
    }
#else
  if (!prefix)
    {
    prefix = "/usr/local";
    }
#endif

  // Compute the set of configurations.
  std::vector<std::string> configurationTypes;
  if(const char* types = 
     this->Makefile->GetDefinition("CMAKE_CONFIGURATION_TYPES"))
    {
    cmSystemTools::ExpandListArgument(types, configurationTypes);
    }
  const char* config = 0;
  if(configurationTypes.empty())
    {
    config = this->Makefile->GetDefinition("CMAKE_BUILD_TYPE");
    }

  // Choose a default install configuration.
  const char* default_config = config;
  const char* default_order[] = {"RELEASE", "MINSIZEREL",
                                 "RELWITHDEBINFO", "DEBUG", 0};
  for(const char** c = default_order; *c && !default_config; ++c)
    {
    for(std::vector<std::string>::iterator i = configurationTypes.begin();
        i != configurationTypes.end(); ++i)
      {
      if(cmSystemTools::UpperCase(*i) == *c)
        {
        default_config = i->c_str();
        }
      }
    }
  if(!default_config && !configurationTypes.empty())
    {
    default_config = configurationTypes[0].c_str();
    }
  if(!default_config)
    {
    default_config = "Release";
    }

  // Create the install script file.
  std::string file = this->Makefile->GetStartOutputDirectory();
  std::string homedir = this->Makefile->GetHomeOutputDirectory();
  std::string currdir = this->Makefile->GetCurrentOutputDirectory();
  cmSystemTools::ConvertToUnixSlashes(file);
  cmSystemTools::ConvertToUnixSlashes(homedir);
  cmSystemTools::ConvertToUnixSlashes(currdir);
  int toplevel_install = 0;
  if ( currdir == homedir )
    {
    toplevel_install = 1;
    }
  file += "/cmake_install.cmake";
  cmGeneratedFileStream fout(file.c_str());
  fout.SetCopyIfDifferent(true);

  // Write the header.
  fout << "# Install script for directory: "
       << this->Makefile->GetCurrentDirectory() << std::endl << std::endl;
  fout << "# Set the install prefix" << std::endl
       << "IF(NOT DEFINED CMAKE_INSTALL_PREFIX)" << std::endl
       << "  SET(CMAKE_INSTALL_PREFIX \"" << prefix << "\")" << std::endl
       << "ENDIF(NOT DEFINED CMAKE_INSTALL_PREFIX)" << std::endl
       << "STRING(REGEX REPLACE \"/$\" \"\" CMAKE_INSTALL_PREFIX "
       << "\"${CMAKE_INSTALL_PREFIX}\")" << std::endl
       << std::endl;

  // Write support code for generating per-configuration install rules.
  fout <<
    "# Set the install configuration name.\n"
    "IF(NOT DEFINED CMAKE_INSTALL_CONFIG_NAME)\n"
    "  IF(BUILD_TYPE)\n"
    "    STRING(REGEX REPLACE \"^[^A-Za-z0-9_]+\" \"\"\n"
    "           CMAKE_INSTALL_CONFIG_NAME \"${BUILD_TYPE}\")\n"
    "  ELSE(BUILD_TYPE)\n"
    "    SET(CMAKE_INSTALL_CONFIG_NAME \"" << default_config << "\")\n"
    "  ENDIF(BUILD_TYPE)\n"
    "  MESSAGE(STATUS \"Install configuration: "
    "\\\"${CMAKE_INSTALL_CONFIG_NAME}\\\"\")\n"
    "ENDIF(NOT DEFINED CMAKE_INSTALL_CONFIG_NAME)\n"
    "\n";

  // Write support code for dealing with component-specific installs.
  fout <<
    "# Set the component getting installed.\n"
    "IF(NOT CMAKE_INSTALL_COMPONENT)\n"
    "  IF(COMPONENT)\n"
    "    MESSAGE(STATUS \"Install component: \\\"${COMPONENT}\\\"\")\n"
    "    SET(CMAKE_INSTALL_COMPONENT \"${COMPONENT}\")\n"
    "  ELSE(COMPONENT)\n"
    "    SET(CMAKE_INSTALL_COMPONENT)\n"
    "  ENDIF(COMPONENT)\n"
    "ENDIF(NOT CMAKE_INSTALL_COMPONENT)\n"
    "\n";

  // Copy user-specified install options to the install code.
  if(const char* so_no_exe =
     this->Makefile->GetDefinition("CMAKE_INSTALL_SO_NO_EXE"))
    {
    fout <<
      "# Install shared libraries without execute permission?\n"
      "IF(NOT DEFINED CMAKE_INSTALL_SO_NO_EXE)\n"
      "  SET(CMAKE_INSTALL_SO_NO_EXE \"" << so_no_exe << "\")\n"
      "ENDIF(NOT DEFINED CMAKE_INSTALL_SO_NO_EXE)\n"
      "\n";
    }

  // Ask each install generator to write its code.
  std::vector<cmInstallGenerator*> const& installers =
    this->Makefile->GetInstallGenerators();
  for(std::vector<cmInstallGenerator*>::const_iterator 
        gi = installers.begin();
      gi != installers.end(); ++gi)
    {
    (*gi)->Generate(fout, config, configurationTypes);
    }

  // Write rules from old-style specification stored in targets.
  this->GenerateTargetInstallRules(fout, config, configurationTypes);

  // Include install scripts from subdirectories.
  if(!this->Children.empty())
    {
    fout << "IF(NOT CMAKE_INSTALL_LOCAL_ONLY)\n";
    fout << "  # Include the install script for each subdirectory.\n";
    for(std::vector<cmLocalGenerator*>::const_iterator
          ci = this->Children.begin(); ci != this->Children.end(); ++ci)
      {
      if(!(*ci)->GetMakefile()->GetPropertyAsBool("EXCLUDE_FROM_ALL"))
        {
        std::string odir = (*ci)->GetMakefile()->GetStartOutputDirectory();
        cmSystemTools::ConvertToUnixSlashes(odir);
        fout << "  INCLUDE(\"" <<  odir.c_str()
             << "/cmake_install.cmake\")" << std::endl;
        }
      }
    fout << "\n";
    fout << "ENDIF(NOT CMAKE_INSTALL_LOCAL_ONLY)\n\n";
    }

  // Record the install manifest.
  if ( toplevel_install )
    {
    fout <<
      "IF(CMAKE_INSTALL_COMPONENT)\n"
      "  SET(CMAKE_INSTALL_MANIFEST \"install_manifest_"
      "${CMAKE_INSTALL_COMPONENT}.txt\")\n"
      "ELSE(CMAKE_INSTALL_COMPONENT)\n"
      "  SET(CMAKE_INSTALL_MANIFEST \"install_manifest.txt\")\n"
      "ENDIF(CMAKE_INSTALL_COMPONENT)\n\n";
    fout
      << "FILE(WRITE \""
      << homedir.c_str() << "/${CMAKE_INSTALL_MANIFEST}\" "
      << "\"\")" << std::endl;
    fout
      << "FOREACH(file ${CMAKE_INSTALL_MANIFEST_FILES})" << std::endl
      << "  FILE(APPEND \""
      << homedir.c_str() << "/${CMAKE_INSTALL_MANIFEST}\" "
      << "\"${file}\\n\")" << std::endl
      << "ENDFOREACH(file)" << std::endl;
    }
}

//----------------------------------------------------------------------------
void cmLocalGenerator::GenerateTargetManifest()
{
  // Collect the set of configuration types.
  std::vector<std::string> configNames;
  if(const char* configurationTypes =
     this->Makefile->GetDefinition("CMAKE_CONFIGURATION_TYPES"))
    {
    cmSystemTools::ExpandListArgument(configurationTypes, configNames);
    }
  else if(const char* buildType =
          this->Makefile->GetDefinition("CMAKE_BUILD_TYPE"))
    {
    if(*buildType)
      {
      configNames.push_back(buildType);
      }
    }

  // Add our targets to the manifest for each configuration.
  cmTargets& targets = this->Makefile->GetTargets();
  for(cmTargets::iterator t = targets.begin(); t != targets.end(); ++t)
    {
    cmTarget& target = t->second;
    if(configNames.empty())
      {
      target.GenerateTargetManifest(0);
      }
    else
      {
      for(std::vector<std::string>::iterator ci = configNames.begin();
          ci != configNames.end(); ++ci)
        {
        const char* config = ci->c_str();
        target.GenerateTargetManifest(config);
        }
      }
    }
}

void cmLocalGenerator::AddCustomCommandToCreateObject(const char* ofname, 
                                                      const char* lang, 
                                                      cmSourceFile& source,
                                                      cmTarget& )
{ 
  std::string objectDir = cmSystemTools::GetFilenamePath(std::string(ofname));
  objectDir = this->Convert(objectDir.c_str(),START_OUTPUT,SHELL);
  std::string objectFile = this->Convert(ofname,START_OUTPUT,SHELL);
  std::string sourceFile = 
    this->Convert(source.GetFullPath().c_str(),START_OUTPUT,SHELL,true);
  std::string varString = "CMAKE_";
  varString += lang;
  varString += "_COMPILE_OBJECT";
  std::vector<std::string> rules;
  rules.push_back(this->Makefile->GetRequiredDefinition(varString.c_str()));
  varString = "CMAKE_";
  varString += lang;
  varString += "_FLAGS";
  std::string flags;
  flags += this->Makefile->GetSafeDefinition(varString.c_str());
  flags += " ";
  flags += this->GetIncludeFlags(lang);

  // Construct the command lines.
  cmCustomCommandLines commandLines;
  std::vector<std::string> commands;
  cmSystemTools::ExpandList(rules, commands);
  cmLocalGenerator::RuleVariables vars;
  vars.Language = lang;
  vars.Source = sourceFile.c_str();
  vars.Object = objectFile.c_str();
  vars.ObjectDir = objectDir.c_str();
  vars.Flags = flags.c_str();
  for(std::vector<std::string>::iterator i = commands.begin();
      i != commands.end(); ++i)
    {
    // Expand the full command line string.
    this->ExpandRuleVariables(*i, vars);

    // Parse the string to get the custom command line.
    cmCustomCommandLine commandLine;
    std::vector<cmStdString> cmd = cmSystemTools::ParseArguments(i->c_str());
    for(std::vector<cmStdString>::iterator a = cmd.begin();
        a != cmd.end(); ++a)
      {
      commandLine.push_back(*a);
      }

    // Store this command line.
    commandLines.push_back(commandLine);
    }

  // Check for extra object-file dependencies.
  std::vector<std::string> depends;
  const char* additionalDeps = source.GetProperty("OBJECT_DEPENDS");
  if(additionalDeps)
    {
    cmSystemTools::ExpandListArgument(additionalDeps, depends);
    }

  // Generate a meaningful comment for the command.
  std::string comment = "Building ";
  comment += lang;
  comment += " object ";
  comment += this->Convert(ofname, START_OUTPUT);

  // Add the custom command to build the object file.
  this->Makefile->AddCustomCommandToOutput(
    ofname,
    depends,
    source.GetFullPath().c_str(),
    commandLines,
    comment.c_str(),
    this->Makefile->GetStartOutputDirectory()
    );
}

void cmLocalGenerator::AddBuildTargetRule(const char* llang, cmTarget& target)
{
  cmStdString objs;
  std::vector<std::string> objVector;
  // Add all the sources outputs to the depends of the target
  std::vector<cmSourceFile*> const& classes = target.GetSourceFiles();
  for(std::vector<cmSourceFile*>::const_iterator i = classes.begin();
      i != classes.end(); ++i)
    {
    cmSourceFile* sf = *i;
    if(!sf->GetCustomCommand() &&
       !sf->GetPropertyAsBool("HEADER_FILE_ONLY") &&
       !sf->GetPropertyAsBool("EXTERNAL_OBJECT"))
      {
      std::string dir_max;
      dir_max += this->Makefile->GetCurrentOutputDirectory();
      dir_max += "/";
      std::string obj = this->GetObjectFileNameWithoutTarget(*sf, dir_max);
      if(!obj.empty())
        {
        std::string ofname = this->Makefile->GetCurrentOutputDirectory();
        ofname += "/";
        ofname += obj;
        objVector.push_back(ofname);
        this->AddCustomCommandToCreateObject(ofname.c_str(), 
                                             llang, *(*i), target);
        objs += this->Convert(ofname.c_str(),START_OUTPUT,MAKEFILE);
        objs += " ";
        }
      }
    }
  std::string createRule = "CMAKE_";
  createRule += llang;
  createRule += target.GetCreateRuleVariable();
  std::string targetName = target.GetFullName();
  // Executable :
  // Shared Library:
  // Static Library:
  // Shared Module:
  std::string linkLibs; // should be set
  std::string flags; // should be set
  std::string linkFlags; // should be set 
  this->GetTargetFlags(linkLibs, flags, linkFlags, target);
  cmLocalGenerator::RuleVariables vars;
  vars.Language = llang;
  vars.Objects = objs.c_str();
  vars.ObjectDir = ".";
  vars.Target = targetName.c_str();
  vars.LinkLibraries = linkLibs.c_str();
  vars.Flags = flags.c_str();
  vars.LinkFlags = linkFlags.c_str();
 
  std::string langFlags;
  this->AddLanguageFlags(langFlags, llang, 0);
  vars.LanguageCompileFlags = langFlags.c_str();
  
  cmCustomCommandLines commandLines;
  std::vector<std::string> rules;
  rules.push_back(this->Makefile->GetRequiredDefinition(createRule.c_str()));
  std::vector<std::string> commands;
  cmSystemTools::ExpandList(rules, commands);  
  for(std::vector<std::string>::iterator i = commands.begin();
      i != commands.end(); ++i)
    {
    // Expand the full command line string.
    this->ExpandRuleVariables(*i, vars);
    // Parse the string to get the custom command line.
    cmCustomCommandLine commandLine;
    std::vector<cmStdString> cmd = cmSystemTools::ParseArguments(i->c_str());
    for(std::vector<cmStdString>::iterator a = cmd.begin();
        a != cmd.end(); ++a)
      {
      commandLine.push_back(*a);
      }

    // Store this command line.
    commandLines.push_back(commandLine);
    }
  std::string targetFullPath = target.GetFullPath();
  // Generate a meaningful comment for the command.
  std::string comment = "Linking ";
  comment += llang;
  comment += " target ";
  comment += this->Convert(targetFullPath.c_str(), START_OUTPUT);
  this->Makefile->AddCustomCommandToOutput(
    targetFullPath.c_str(),
    objVector,
    0,
    commandLines,
    comment.c_str(),
    this->Makefile->GetStartOutputDirectory()
    );
  target.AddSourceFile
    (this->Makefile->GetSource(targetFullPath.c_str()));
}

  
void cmLocalGenerator
::CreateCustomTargetsAndCommands(std::set<cmStdString> const& lang)
{ 
  cmTargets &tgts = this->Makefile->GetTargets();
  for(cmTargets::iterator l = tgts.begin(); 
      l != tgts.end(); l++)
    {
    cmTarget& target = l->second;
    switch(target.GetType())
      { 
      case cmTarget::STATIC_LIBRARY:
      case cmTarget::SHARED_LIBRARY:
      case cmTarget::MODULE_LIBRARY:
      case cmTarget::EXECUTABLE: 
        {
        const char* llang = 
          target.GetLinkerLanguage(this->GetGlobalGenerator());
        if(!llang)
          {
          cmSystemTools::Error
            ("CMake can not determine linker language for target:",
             target.GetName());
          return;
          }
        // if the language is not in the set lang then create custom
        // commands to build the target
        if(lang.count(llang) == 0)
          {
          this->AddBuildTargetRule(llang, target);
          }
        }
        break; 
      default:
        break;
      }
    }
}

// List of variables that are replaced when
// rules are expanced.  These variables are
// replaced in the form <var> with GetSafeDefinition(var).
// ${LANG} is replaced in the variable first with all enabled 
// languages.
static const char* ruleReplaceVars[] =
{
  "CMAKE_${LANG}_COMPILER",
  "CMAKE_SHARED_LIBRARY_CREATE_${LANG}_FLAGS",
  "CMAKE_SHARED_MODULE_CREATE_${LANG}_FLAGS",
  "CMAKE_SHARED_MODULE_${LANG}_FLAGS", 
  "CMAKE_SHARED_LIBRARY_${LANG}_FLAGS",
  "CMAKE_${LANG}_LINK_FLAGS",
  "CMAKE_SHARED_LIBRARY_SONAME_${LANG}_FLAG",
  "CMAKE_${LANG}_ARCHIVE",
  "CMAKE_AR",
  "CMAKE_CURRENT_SOURCE_DIR",
  "CMAKE_CURRENT_BINARY_DIR",
  "CMAKE_RANLIB",
  "CMAKE_LINKER",
  0
};

std::string
cmLocalGenerator::ExpandRuleVariable(std::string const& variable,
                                     const RuleVariables& replaceValues)
{
  if(replaceValues.LinkFlags)
    {
    if(variable == "LINK_FLAGS")
      {
      return replaceValues.LinkFlags;
      }
    }
  if(replaceValues.Flags)
    {
    if(variable == "FLAGS")
      {
      return replaceValues.Flags;
      }
    }
    
  if(replaceValues.Source)
    {
    if(variable == "SOURCE")
      {
      return replaceValues.Source;
      }
    }
  if(replaceValues.PreprocessedSource)
    {
    if(variable == "PREPROCESSED_SOURCE")
      {
      return replaceValues.PreprocessedSource;
      }
    }
  if(replaceValues.AssemblySource)
    {
    if(variable == "ASSEMBLY_SOURCE")
      {
      return replaceValues.AssemblySource;
      }
    }
  if(replaceValues.Object)
    {
    if(variable == "OBJECT")
      {
      return replaceValues.Object;
      }
    }
  if(replaceValues.ObjectDir)
    {
    if(variable == "OBJECT_DIR")
      {
      return replaceValues.ObjectDir;
      }
    }
  if(replaceValues.Objects)
    {
    if(variable == "OBJECTS")
      {
      return replaceValues.Objects;
      }
    }
  if(replaceValues.ObjectsQuoted)
    {
    if(variable == "OBJECTS_QUOTED")
      {
      return replaceValues.ObjectsQuoted;
      }
    }
  if(replaceValues.Defines && variable == "DEFINES")
    {
    return replaceValues.Defines;
    }
  if(replaceValues.TargetPDB )
    {
    if(variable == "TARGET_PDB")
      {
      return replaceValues.TargetPDB;
      }
    }

  if(replaceValues.Target)
    { 
    if(variable == "TARGET_QUOTED")
      {
      std::string targetQuoted = replaceValues.Target;
      if(targetQuoted.size() && targetQuoted[0] != '\"')
        {
        targetQuoted = '\"';
        targetQuoted += replaceValues.Target;
        targetQuoted += '\"';
        }
      return targetQuoted;
      }
    if(replaceValues.LanguageCompileFlags)
      {
      if(variable == "LANGUAGE_COMPILE_FLAGS")
        {
        return replaceValues.LanguageCompileFlags;
        }
      }
    if(replaceValues.Target)
      {
      if(variable == "TARGET")
        {
        return replaceValues.Target;
        }
      }
    if(variable == "TARGET_IMPLIB")
      {
      return this->TargetImplib;
      }
    if(variable == "TARGET_VERSION_MAJOR")
      {
      if(replaceValues.TargetVersionMajor)
        {
        return replaceValues.TargetVersionMajor;
        }
      else
        {
        return "0";
        }
      }
    if(variable == "TARGET_VERSION_MINOR")
      {
      if(replaceValues.TargetVersionMinor)
        {
        return replaceValues.TargetVersionMinor;
        }
      else
        {
        return "0";
        }
      }
    if(replaceValues.Target)
      {
      if(variable == "TARGET_BASE")
        {
        // Strip the last extension off the target name.
        std::string targetBase = replaceValues.Target;
        std::string::size_type pos = targetBase.rfind(".");
        if(pos != targetBase.npos)
          {
        return targetBase.substr(0, pos);
          }
        else
          {
          return targetBase;
          }
        }
      }
    }
  if(replaceValues.TargetSOName)
    {
    if(variable == "TARGET_SONAME")
      {
      if(replaceValues.Language)
        {
        std::string name = "CMAKE_SHARED_LIBRARY_SONAME_";
        name += replaceValues.Language;
        name += "_FLAG";
        if(this->Makefile->GetDefinition(name.c_str()))
          {
          return replaceValues.TargetSOName;
          }
        }
      return "";
      }
    }
  if(replaceValues.TargetInstallNameDir)
    {
    if(variable == "TARGET_INSTALLNAME_DIR")
      {
      return replaceValues.TargetInstallNameDir;
      }
    }
  if(replaceValues.LinkLibraries)
    {
    if(variable == "LINK_LIBRARIES")
      {
      return replaceValues.LinkLibraries;
      }
    }
  if(variable == "CMAKE_COMMAND")
    {
    const char* cmcommand =
      this->GetMakefile()->GetDefinition("CMAKE_COMMAND");
    return this->Convert(cmcommand, FULL, SHELL);
    }
  std::vector<std::string> enabledLanguages;
  this->GlobalGenerator->GetEnabledLanguages(enabledLanguages);
  // loop over language specific replace variables
  int pos = 0;
  while(ruleReplaceVars[pos])
    {
    for(std::vector<std::string>::iterator i = enabledLanguages.begin();   
        i != enabledLanguages.end(); ++i)   
      { 
      const char* lang = i->c_str();
      std::string actualReplace = ruleReplaceVars[pos];
      // If this is the compiler then look for the extra variable
      // _COMPILER_ARG1 which must be the first argument to the compiler 
      const char* compilerArg1 = 0;
      if(actualReplace == "CMAKE_${LANG}_COMPILER")
        {
        std::string arg1 = actualReplace + "_ARG1";
        cmSystemTools::ReplaceString(arg1, "${LANG}", lang);
        compilerArg1 = this->Makefile->GetDefinition(arg1.c_str());
        }
      if(actualReplace.find("${LANG}") != actualReplace.npos)
        {
        cmSystemTools::ReplaceString(actualReplace, "${LANG}", lang);
        }
      if(actualReplace == variable)
        {
        std::string replace = 
          this->Makefile->GetSafeDefinition(variable.c_str());
        // if the variable is not a FLAG then treat it like a path
        if(variable.find("_FLAG") == variable.npos)
          {
          std::string ret = this->ConvertToOutputForExisting(replace.c_str());
          // if there is a required first argument to the compiler add it
          // to the compiler string
          if(compilerArg1)
            {
            ret += " ";
            ret += compilerArg1;
            }
          return ret;
          }
        return replace;
        }
      }
    pos++;
    }
  return variable;
}


void 
cmLocalGenerator::ExpandRuleVariables(std::string& s,
                                      const RuleVariables& replaceValues)
{
  std::vector<std::string> enabledLanguages;
  this->GlobalGenerator->GetEnabledLanguages(enabledLanguages);
  std::string::size_type start = s.find('<');
  // no variables to expand
  if(start == s.npos)
    {
    return;
    }
  std::string::size_type pos = 0;
  std::string expandedInput;
  while(start != s.npos && start < s.size()-2)
    {
    std::string::size_type end = s.find('>', start);
    // if we find a < with no > we are done
    if(end == s.npos)
      {
      return;
      }
    char c = s[start+1];
    // if the next char after the < is not A-Za-z then
    // skip it and try to find the next < in the string
    if(!isalpha(c))
      {
      start = s.find('<', start+1);
      }
    else
      {
      // extract the var
      std::string var = s.substr(start+1,  end - start-1);
      std::string replace = this->ExpandRuleVariable(var,
                                                     replaceValues);
      expandedInput += s.substr(pos, start-pos);
      expandedInput += replace;
      // move to next one
      start = s.find('<', start+var.size()+2);
      pos = end+1;
      }
    }
  // add the rest of the input
  expandedInput += s.substr(pos, s.size()-pos);
  s = expandedInput;
}

//----------------------------------------------------------------------------
std::string
cmLocalGenerator::ConvertToOutputForExistingCommon(const char* remote,
                                                   std::string const& result)
{
  // If this is a windows shell, the result has a space, and the path
  // already exists, we can use a short-path to reference it without a
  // space.
  if(this->WindowsShell && result.find(' ') != result.npos &&
     cmSystemTools::FileExists(remote))
    {
    std<