/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying

   file LICENSE.rst or https://cmake.org/licensing for details.  */

#include "cmMakefileLibraryTargetGenerator.h"

#include <cstddef>

#include <set>

#include <sstream>

#include <utility>

#include <vector>

#include <cm/memory>

#include <cmext/algorithm>

#include "cmGeneratedFileStream.h"

#include "cmGeneratorOptions.h"

#include "cmGeneratorTarget.h"

#include "cmGlobalUnixMakefileGenerator3.h"

#include "cmLinkLineComputer.h"

#include "cmLinkLineDeviceComputer.h"

#include "cmList.h"

#include "cmLocalGenerator.h"

#include "cmLocalUnixMakefileGenerator3.h"

#include "cmMakefile.h"

#include "cmOSXBundleGenerator.h"

#include "cmOutputConverter.h"

#include "cmRulePlaceholderExpander.h"

#include "cmState.h"

#include "cmStateDirectory.h"

#include "cmStateSnapshot.h"

#include "cmStateTypes.h"

#include "cmStringAlgorithms.h"

#include "cmSystemTools.h"

#include "cmValue.h"

cmMakefileLibraryTargetGenerator::cmMakefileLibraryTargetGenerator(

  cmGeneratorTarget* target)

  : cmMakefileTargetGenerator(target)

{

  this->CustomCommandDriver = OnDepends;

  if (this->GeneratorTarget->GetType() != cmStateEnums::INTERFACE_LIBRARY) {

    this->TargetNames =

      this->GeneratorTarget->GetLibraryNames(this->GetConfigName());

  }

  this->OSXBundleGenerator = cm::make_unique<cmOSXBundleGenerator>(target);

  this->OSXBundleGenerator->SetMacContentFolders(&this->MacContentFolders);

}

cmMakefileLibraryTargetGenerator::~cmMakefileLibraryTargetGenerator() =

  default;

void cmMakefileLibraryTargetGenerator::WriteRuleFiles()

{

  // create the build.make file and directory, put in the common blocks

  this->CreateRuleFile();

  // write rules used to help build object files

  this->WriteCommonCodeRules();

  // write the per-target per-language flags

  this->WriteTargetLanguageFlags();

  // write in rules for object files and custom commands

  this->WriteTargetBuildRules();

  // Write in the rules for the link dependency file

  this->WriteTargetLinkDependRules();

  // write the link rules

  // Write the rule for this target type.

  switch (this->GeneratorTarget->GetType()) {

    case cmStateEnums::STATIC_LIBRARY:

      this->WriteStaticLibraryRules();

      break;

    case cmStateEnums::SHARED_LIBRARY:

      this->WriteSharedLibraryRules(false);

      if (this->GeneratorTarget->NeedRelinkBeforeInstall(

            this->GetConfigName())) {

        // Write rules to link an installable version of the target.

        this->WriteSharedLibraryRules(true);

      }

      break;

    case cmStateEnums::MODULE_LIBRARY:

      this->WriteModuleLibraryRules(false);

      if (this->GeneratorTarget->NeedRelinkBeforeInstall(

            this->GetConfigName())) {

        // Write rules to link an installable version of the target.

        this->WriteModuleLibraryRules(true);

      }

      break;

    case cmStateEnums::OBJECT_LIBRARY:

      this->WriteObjectLibraryRules();

      break;

    default:

      // If language is not known, this is an error.

      cmSystemTools::Error("Unknown Library Type");

      break;

  }

  // Write clean target

  this->WriteTargetCleanRules();

  // Write the dependency generation rule.  This must be done last so

  // that multiple output pair information is available.

  this->WriteTargetDependRules();

  // close the streams

  this->CloseFileStreams();

}

void cmMakefileLibraryTargetGenerator::WriteObjectLibraryRules()

{

  std::vector<std::string> commands;

  std::vector<std::string> depends;

  // Add post-build rules.

  this->LocalGenerator->AppendCustomCommands(

    commands, this->GeneratorTarget->GetPostBuildCommands(),

    this->GeneratorTarget, this->LocalGenerator->GetBinaryDirectory());

  // Depend on the object files.

  this->AppendObjectDepends(depends);

  // Write the rule.

  this->LocalGenerator->WriteMakeRule(*this->BuildFileStream, nullptr,

                                      this->GeneratorTarget->GetName(),

                                      depends, commands, true);

  // Write the main driver rule to build everything in this target.

  this->WriteTargetDriverRule(this->GeneratorTarget->GetName(), false);

}

void cmMakefileLibraryTargetGenerator::WriteStaticLibraryRules()

{

  bool const requiresDeviceLinking = requireDeviceLinking(

    *this->GeneratorTarget, *this->LocalGenerator, this->GetConfigName());

  if (requiresDeviceLinking) {

    this->WriteDeviceLibraryRules("CMAKE_CUDA_DEVICE_LINK_LIBRARY", false);

  }

  std::string linkLanguage =

    this->GeneratorTarget->GetLinkerLanguage(this->GetConfigName());

  std::string linkRuleVar = this->GeneratorTarget->GetCreateRuleVariable(

    linkLanguage, this->GetConfigName());

  std::string extraFlags;

  this->LocalGenerator->GetStaticLibraryFlags(

    extraFlags, this->GetConfigName(), linkLanguage, this->GeneratorTarget);

  this->WriteLibraryRules(linkRuleVar, extraFlags, false);

}

void cmMakefileLibraryTargetGenerator::WriteSharedLibraryRules(bool relink)

{

  if (this->GeneratorTarget->IsFrameworkOnApple()) {

    this->WriteFrameworkRules(relink);

    return;

  }

  if (!relink) {

    bool const requiresDeviceLinking = requireDeviceLinking(

      *this->GeneratorTarget, *this->LocalGenerator, this->GetConfigName());

    if (requiresDeviceLinking) {

      this->WriteDeviceLibraryRules("CMAKE_CUDA_DEVICE_LINK_LIBRARY", relink);

    }

  }

  std::string linkLanguage =

    this->GeneratorTarget->GetLinkerLanguage(this->GetConfigName());

  std::string linkRuleVar =

    cmStrCat("CMAKE_", linkLanguage, "_CREATE_SHARED_LIBRARY");

  if (this->GeneratorTarget->IsArchivedAIXSharedLibrary()) {

    linkRuleVar =

      cmStrCat("CMAKE_", linkLanguage, "_CREATE_SHARED_LIBRARY_ARCHIVE");

  }

  std::string extraFlags;

  this->LocalGenerator->AppendTargetCreationLinkFlags(

    extraFlags, this->GeneratorTarget, linkLanguage);

  this->LocalGenerator->AddTargetTypeLinkerFlags(

    extraFlags, this->GeneratorTarget, linkLanguage, this->GetConfigName());

  this->LocalGenerator->AddPerLanguageLinkFlags(

    extraFlags, this->GeneratorTarget, linkLanguage, this->GetConfigName());

  std::unique_ptr<cmLinkLineComputer> linkLineComputer =

    this->CreateLinkLineComputer(

      this->LocalGenerator,

      this->LocalGenerator->GetStateSnapshot().GetDirectory());

  this->LocalGenerator->AppendModuleDefinitionFlag(

    extraFlags, this->GeneratorTarget, linkLineComputer.get(),

    this->GetConfigName(), linkLanguage);

  this->UseLWYU = this->LocalGenerator->AppendLWYUFlags(

    extraFlags, this->GeneratorTarget, linkLanguage);

  this->GetTargetLinkFlags(extraFlags, linkLanguage);

  this->WriteLibraryRules(linkRuleVar, extraFlags, relink);

}

void cmMakefileLibraryTargetGenerator::WriteModuleLibraryRules(bool relink)

{

  if (!relink) {

    bool const requiresDeviceLinking = requireDeviceLinking(

      *this->GeneratorTarget, *this->LocalGenerator, this->GetConfigName());

    if (requiresDeviceLinking) {

      this->WriteDeviceLibraryRules("CMAKE_CUDA_DEVICE_LINK_LIBRARY", relink);

    }

  }

  std::string linkLanguage =

    this->GeneratorTarget->GetLinkerLanguage(this->GetConfigName());

  std::string linkRuleVar =

    cmStrCat("CMAKE_", linkLanguage, "_CREATE_SHARED_MODULE");

  std::string extraFlags;

  this->LocalGenerator->AppendTargetCreationLinkFlags(

    extraFlags, this->GeneratorTarget, linkLanguage);

  this->LocalGenerator->AddTargetTypeLinkerFlags(

    extraFlags, this->GeneratorTarget, linkLanguage, this->GetConfigName());

  this->LocalGenerator->AddPerLanguageLinkFlags(

    extraFlags, this->GeneratorTarget, linkLanguage, this->GetConfigName());

  std::unique_ptr<cmLinkLineComputer> linkLineComputer =

    this->CreateLinkLineComputer(

      this->LocalGenerator,

      this->LocalGenerator->GetStateSnapshot().GetDirectory());

  this->LocalGenerator->AppendModuleDefinitionFlag(

    extraFlags, this->GeneratorTarget, linkLineComputer.get(),

    this->GetConfigName(), linkLanguage);

  this->UseLWYU = this->LocalGenerator->AppendLWYUFlags(

    extraFlags, this->GeneratorTarget, linkLanguage);

  this->GetTargetLinkFlags(extraFlags, linkLanguage);

  this->WriteLibraryRules(linkRuleVar, extraFlags, relink);

}

void cmMakefileLibraryTargetGenerator::WriteFrameworkRules(bool relink)

{

  std::string linkLanguage =

    this->GeneratorTarget->GetLinkerLanguage(this->GetConfigName());

  std::string linkRuleVar =

    cmStrCat("CMAKE_", linkLanguage, "_CREATE_MACOSX_FRAMEWORK");

  std::string extraFlags;

  this->LocalGenerator->AppendTargetCreationLinkFlags(

    extraFlags, this->GeneratorTarget, linkLanguage);

  this->LocalGenerator->AddConfigVariableFlags(

    extraFlags, "CMAKE_MACOSX_FRAMEWORK_LINKER_FLAGS", this->GeneratorTarget,

    cmBuildStep::Link, linkLanguage, this->GetConfigName());

  this->GetTargetLinkFlags(extraFlags, linkLanguage);

  this->WriteLibraryRules(linkRuleVar, extraFlags, relink);

}

void cmMakefileLibraryTargetGenerator::WriteDeviceLibraryRules(

  std::string const& linkRuleVar, bool relink)

{

#ifndef CMAKE_BOOTSTRAP

  // TODO: Merge the methods that call this method to avoid

  // code duplication.

  std::vector<std::string> commands;

  std::string const objExt =

    this->Makefile->GetSafeDefinition("CMAKE_CUDA_OUTPUT_EXTENSION");

  // Get the name of the device object to generate.

  std::string const targetOutput =

    this->GeneratorTarget->ObjectDirectory + "cmake_device_link" + objExt;

  this->DeviceLinkObject = targetOutput;

  this->NumberOfProgressActions++;

  if (!this->NoRuleMessages) {

    cmLocalUnixMakefileGenerator3::EchoProgress progress;

    this->MakeEchoProgress(progress);

    // Add the link message.

    std::string buildEcho = cmStrCat(

      "Linking CUDA device code ",

      this->LocalGenerator->ConvertToOutputFormat(

        this->LocalGenerator->MaybeRelativeToCurBinDir(this->DeviceLinkObject),

        cmOutputConverter::SHELL));

    this->LocalGenerator->AppendEcho(

      commands, buildEcho, cmLocalUnixMakefileGenerator3::EchoLink, &progress);

  }

  if (this->Makefile->GetSafeDefinition("CMAKE_CUDA_COMPILER_ID") == "Clang") {

    this->WriteDeviceLinkRule(commands, targetOutput);

  } else {

    this->WriteNvidiaDeviceLibraryRules(linkRuleVar, relink, commands,

                                        targetOutput);

  }

  // Write the main driver rule to build everything in this target.

  this->WriteTargetDriverRule(targetOutput, relink);

}

void cmMakefileLibraryTargetGenerator::WriteNvidiaDeviceLibraryRules(

  std::string const& linkRuleVar, bool relink,

  std::vector<std::string>& commands, std::string const& targetOutput)

{

  std::string linkLanguage = "CUDA";

  // Build list of dependencies.

  std::vector<std::string> depends;

  this->AppendLinkDepends(depends, linkLanguage);

  // Add language-specific flags.

  std::string langFlags;

  this->LocalGenerator->AddLanguageFlagsForLinking(

    langFlags, this->GeneratorTarget, linkLanguage, this->GetConfigName());

  // Clean files associated with this library.

  std::set<std::string> libCleanFiles;

  libCleanFiles.insert(

    this->LocalGenerator->MaybeRelativeToCurBinDir(targetOutput));

  // Determine whether a link script will be used.

  bool useLinkScript = this->GlobalGenerator->GetUseLinkScript();

  bool useResponseFileForObjects =

    this->CheckUseResponseFileForObjects(linkLanguage);

  bool const useResponseFileForLibs =

    this->CheckUseResponseFileForLibraries(linkLanguage);

  cmRulePlaceholderExpander::RuleVariables vars;

  vars.Language = linkLanguage.c_str();

  // Expand the rule variables.

  cmList real_link_commands;

  {

    // Set path conversion for link script shells.

    this->LocalGenerator->SetLinkScriptShell(useLinkScript);

    // Collect up flags to link in needed libraries.

    std::string linkLibs;

    std::unique_ptr<cmLinkLineDeviceComputer> linkLineComputer(

      new cmLinkLineDeviceComputer(

        this->LocalGenerator,

        this->LocalGenerator->GetStateSnapshot().GetDirectory()));

    linkLineComputer->SetForResponse(useResponseFileForLibs);

    linkLineComputer->SetRelink(relink);

    // Create set of linking flags.

    std::string linkFlags;

    std::string ignored_;

    this->LocalGenerator->GetDeviceLinkFlags(

      *linkLineComputer, this->GetConfigName(), ignored_, linkFlags, ignored_,

      ignored_, this->GeneratorTarget);

    this->CreateLinkLibs(

      linkLineComputer.get(), linkLibs, useResponseFileForLibs, depends,

      linkLanguage, cmMakefileTargetGenerator::ResponseFlagFor::DeviceLink);

    // Construct object file lists that may be needed to expand the

    // rule.

    std::string buildObjs;

    this->CreateObjectLists(

      useLinkScript, false, // useArchiveRules

      useResponseFileForObjects, buildObjs, depends, false, linkLanguage,

      cmMakefileTargetGenerator::ResponseFlagFor::DeviceLink);

    std::string objectDir = this->GeneratorTarget->GetSupportDirectory();

    objectDir = this->LocalGenerator->ConvertToOutputFormat(

      this->LocalGenerator->MaybeRelativeToCurBinDir(objectDir),

      cmOutputConverter::SHELL);

    std::string targetSupportDir =

      this->GeneratorTarget->GetCMFSupportDirectory();

    targetSupportDir = this->LocalGenerator->ConvertToOutputFormat(

      this->LocalGenerator->MaybeRelativeToTopBinDir(targetSupportDir),

      cmOutputConverter::SHELL);

    std::string target = this->LocalGenerator->ConvertToOutputFormat(

      this->LocalGenerator->MaybeRelativeToCurBinDir(targetOutput),

      cmOutputConverter::SHELL);

    std::string targetFullPathCompilePDB =

      this->ComputeTargetCompilePDB(this->GetConfigName());

    std::string targetOutPathCompilePDB =

      this->LocalGenerator->ConvertToOutputFormat(targetFullPathCompilePDB,

                                                  cmOutputConverter::SHELL);

    vars.Objects = buildObjs.c_str();

    vars.ObjectDir = objectDir.c_str();

    vars.TargetSupportDir = targetSupportDir.c_str();

    vars.Target = target.c_str();

    vars.LinkLibraries = linkLibs.c_str();

    vars.ObjectsQuoted = buildObjs.c_str();

    vars.LanguageCompileFlags = langFlags.c_str();

    vars.LinkFlags = linkFlags.c_str();

    vars.TargetCompilePDB = targetOutPathCompilePDB.c_str();

    std::string launcher;

    std::string val = this->LocalGenerator->GetRuleLauncher(

      this->GeneratorTarget, "RULE_LAUNCH_LINK",

      this->Makefile->GetSafeDefinition("CMAKE_BUILD_TYPE"));

    if (cmNonempty(val)) {

      launcher = cmStrCat(val, ' ');

    }

    auto rulePlaceholderExpander =

      this->LocalGenerator->CreateRulePlaceholderExpander(cmBuildStep::Link);

    // Construct the main link rule and expand placeholders.

    rulePlaceholderExpander->SetTargetImpLib(targetOutput);

    std::string linkRule = this->GetLinkRule(linkRuleVar);

    real_link_commands.append(linkRule);

    // Expand placeholders.

    for (auto& real_link_command : real_link_commands) {

      real_link_command = cmStrCat(launcher, real_link_command);

      rulePlaceholderExpander->ExpandRuleVariables(this->LocalGenerator,

                                                   real_link_command, vars);

    }

    // Restore path conversion to normal shells.

    this->LocalGenerator->SetLinkScriptShell(false);

    // Clean all the possible library names and symlinks.

    this->CleanFiles.insert(libCleanFiles.begin(), libCleanFiles.end());

  }

  std::vector<std::string> commands1;

  // Optionally convert the build rule to use a script to avoid long

  // command lines in the make shell.

  if (useLinkScript) {

    // Use a link script.

    char const* name = (relink ? "drelink.txt" : "dlink.txt");

    this->CreateLinkScript(name, real_link_commands, commands1, depends);

  } else {

    // No link script.  Just use the link rule directly.

    commands1 = real_link_commands;

  }

  this->LocalGenerator->CreateCDCommand(

    commands1, this->Makefile->GetCurrentBinaryDirectory(),

    this->LocalGenerator->GetBinaryDirectory());

  cm::append(commands, commands1);

  commands1.clear();

  // Compute the list of outputs.

  std::vector<std::string> outputs(1, targetOutput);

  // Write the build rule.

  this->WriteMakeRule(*this->BuildFileStream, nullptr, outputs, depends,

                      commands, false);

#else

  static_cast<void>(linkRuleVar);

  static_cast<void>(relink);

#endif

}

void cmMakefileLibraryTargetGenerator::WriteLibraryRules(

  std::string const& linkRuleVar, std::string const& extraFlags, bool relink)

{

  // TODO: Merge the methods that call this method to avoid

  // code duplication.

  std::vector<std::string> commands;

  // Get the language to use for linking this library.

  std::string linkLanguage =

    this->GeneratorTarget->GetLinkerLanguage(this->GetConfigName());

  // Make sure we have a link language.

  if (linkLanguage.empty()) {

    cmSystemTools::Error("Cannot determine link language for target \"" +

                         this->GeneratorTarget->GetName() + "\".");

    return;

  }

  auto linker = this->GeneratorTarget->GetLinkerTool(this->GetConfigName());

  // Build list of dependencies.

  std::vector<std::string> depends;

  this->AppendLinkDepends(depends, linkLanguage);

  if (!this->DeviceLinkObject.empty()) {

    depends.push_back(this->DeviceLinkObject);

  }

  // Create set of linking flags.

  std::string linkFlags;

  this->LocalGenerator->AppendFlags(linkFlags, extraFlags);

  this->LocalGenerator->AppendIPOLinkerFlags(

    linkFlags, this->GeneratorTarget, this->GetConfigName(), linkLanguage);

  // Add OSX version flags, if any.

  if (this->GeneratorTarget->GetType() == cmStateEnums::SHARED_LIBRARY ||

      this->GeneratorTarget->GetType() == cmStateEnums::MODULE_LIBRARY) {

    this->AppendOSXVerFlag(linkFlags, linkLanguage, "COMPATIBILITY", true);

    this->AppendOSXVerFlag(linkFlags, linkLanguage, "CURRENT", false);

  }

  // Construct the name of the library.

  this->GeneratorTarget->GetLibraryNames(this->GetConfigName());

  // Construct the full path version of the names.

  std::string outpath;

  std::string outpathImp;

  if (this->GeneratorTarget->IsFrameworkOnApple()) {

    outpath = this->GeneratorTarget->GetDirectory(this->GetConfigName());

    cmOSXBundleGenerator::SkipParts bundleSkipParts;

    if (this->GeneratorTarget->HasImportLibrary(this->GetConfigName())) {

      bundleSkipParts.TextStubs = false;

    }

    this->OSXBundleGenerator->CreateFramework(this->TargetNames.Output,

                                              outpath, this->GetConfigName(),

                                              bundleSkipParts);

    outpath += '/';

    if (!this->TargetNames.ImportLibrary.empty()) {

      outpathImp = this->GeneratorTarget->GetDirectory(

        this->GetConfigName(), cmStateEnums::ImportLibraryArtifact);

      cmSystemTools::MakeDirectory(outpathImp);

      outpathImp += '/';

    }

  } else if (this->GeneratorTarget->IsCFBundleOnApple()) {

    outpath = this->GeneratorTarget->GetDirectory(this->GetConfigName());

    this->OSXBundleGenerator->CreateCFBundle(this->TargetNames.Output, outpath,

                                             this->GetConfigName());

    outpath += '/';

  } else if (relink) {

    outpath = cmStrCat(this->Makefile->GetCurrentBinaryDirectory(),

                       "/CMakeFiles/CMakeRelink.dir");

    cmSystemTools::MakeDirectory(outpath);

    outpath += '/';

    if (!this->TargetNames.ImportLibrary.empty()) {

      outpathImp = outpath;

    }

  } else {

    outpath = this->GeneratorTarget->GetDirectory(this->GetConfigName());

    cmSystemTools::MakeDirectory(outpath);

    outpath += '/';

    if (!this->TargetNames.ImportLibrary.empty()) {

      outpathImp = this->GeneratorTarget->GetDirectory(

        this->GetConfigName(), cmStateEnums::ImportLibraryArtifact);

      cmSystemTools::MakeDirectory(outpathImp);

      outpathImp += '/';

    }

  }

  std::string compilePdbOutputPath =

    this->GeneratorTarget->GetCompilePDBDirectory(this->GetConfigName());

  cmSystemTools::MakeDirectory(compilePdbOutputPath);

  std::string pdbOutputPath =

    this->GeneratorTarget->GetPDBDirectory(this->GetConfigName());

  cmSystemTools::MakeDirectory(pdbOutputPath);

  pdbOutputPath += "/";

  std::string targetFullPath = outpath + this->TargetNames.Output;

  std::string targetFullPathPDB = pdbOutputPath + this->TargetNames.PDB;

  std::string targetFullPathSO = outpath + this->TargetNames.SharedObject;

  std::string targetFullPathReal = outpath + this->TargetNames.Real;

  std::string targetFullPathImport =

    outpathImp + this->TargetNames.ImportLibrary;

  // Construct the output path version of the names for use in command

  // arguments.

  std::string targetOutPathPDB = this->LocalGenerator->ConvertToOutputFormat(

    targetFullPathPDB, cmOutputConverter::SHELL);

  std::string targetOutPath = this->LocalGenerator->ConvertToOutputFormat(

    this->LocalGenerator->MaybeRelativeToCurBinDir(targetFullPath),

    cmOutputConverter::SHELL);

  std::string targetOutPathSO = this->LocalGenerator->ConvertToOutputFormat(

    this->LocalGenerator->MaybeRelativeToCurBinDir(targetFullPathSO),

    cmOutputConverter::SHELL);

  std::string targetOutPathReal = this->LocalGenerator->ConvertToOutputFormat(

    this->LocalGenerator->MaybeRelativeToCurBinDir(targetFullPathReal),

    cmOutputConverter::SHELL);

  std::string targetOutPathImport =

    this->LocalGenerator->ConvertToOutputFormat(

      this->LocalGenerator->MaybeRelativeToCurBinDir(targetFullPathImport),

      cmOutputConverter::SHELL);

  this->NumberOfProgressActions++;

  if (!this->NoRuleMessages) {

    cmLocalUnixMakefileGenerator3::EchoProgress progress;

    this->MakeEchoProgress(progress);

    // Add the link message.

    std::string buildEcho = cmStrCat("Linking ", linkLanguage);

    switch (this->GeneratorTarget->GetType()) {

      case cmStateEnums::STATIC_LIBRARY:

        buildEcho += " static library ";

        break;

      case cmStateEnums::SHARED_LIBRARY:

        buildEcho += " shared library ";

        break;

      case cmStateEnums::MODULE_LIBRARY:

        if (this->GeneratorTarget->IsCFBundleOnApple()) {

          buildEcho += " CFBundle";

        }

        buildEcho += " shared module ";

        break;

      default:

        buildEcho += " library ";

        break;

    }

    buildEcho += targetOutPath;

    this->LocalGenerator->AppendEcho(

      commands, buildEcho, cmLocalUnixMakefileGenerator3::EchoLink, &progress);

  }

  // Clean files associated with this library.

  std::set<std::string> libCleanFiles;

  libCleanFiles.insert(

    this->LocalGenerator->MaybeRelativeToCurBinDir(targetFullPathReal));

  std::vector<std::string> commands1;

  // Add a command to remove any existing files for this library.

  // for static libs only

  if (this->GeneratorTarget->GetType() == cmStateEnums::STATIC_LIBRARY) {

    this->LocalGenerator->AppendCleanCommand(commands1, libCleanFiles,

                                             this->GeneratorTarget, "target");

    this->LocalGenerator->CreateCDCommand(

      commands1, this->Makefile->GetCurrentBinaryDirectory(),

      this->LocalGenerator->GetBinaryDirectory());

    cm::append(commands, commands1);

    commands1.clear();

  }

  if (this->TargetNames.Output != this->TargetNames.Real) {

    libCleanFiles.insert(

      this->LocalGenerator->MaybeRelativeToCurBinDir(targetFullPath));

  }

  if (this->TargetNames.SharedObject != this->TargetNames.Real &&

      this->TargetNames.SharedObject != this->TargetNames.Output) {

    libCleanFiles.insert(

      this->LocalGenerator->MaybeRelativeToCurBinDir(targetFullPathSO));

  }

  if (!this->TargetNames.ImportLibrary.empty()) {

    libCleanFiles.insert(

      this->LocalGenerator->MaybeRelativeToCurBinDir(targetFullPathImport));

    std::string implib;

    if (this->GeneratorTarget->GetImplibGNUtoMS(

          this->GetConfigName(), targetFullPathImport, implib)) {

      libCleanFiles.insert(

        this->LocalGenerator->MaybeRelativeToCurBinDir(implib));

    }

  }

  // List the PDB for cleaning only when the whole target is

  // cleaned.  We do not want to delete the .pdb file just before

  // linking the target.

  this->CleanFiles.insert(

    this->LocalGenerator->MaybeRelativeToCurBinDir(targetFullPathPDB));

#ifdef _WIN32

  // There may be a manifest file for this target.  Add it to the

  // clean set just in case.

  if (this->GeneratorTarget->GetType() != cmStateEnums::STATIC_LIBRARY) {

    libCleanFiles.insert(this->LocalGenerator->MaybeRelativeToCurBinDir(

      targetFullPath + ".manifest"));

  }

#endif

  // Add the pre-build and pre-link rules building but not when relinking.

  if (!relink) {

    this->LocalGenerator->AppendCustomCommands(

      commands, this->GeneratorTarget->GetPreBuildCommands(),

      this->GeneratorTarget, this->LocalGenerator->GetBinaryDirectory());

    this->LocalGenerator->AppendCustomCommands(

      commands, this->GeneratorTarget->GetPreLinkCommands(),

      this->GeneratorTarget, this->LocalGenerator->GetBinaryDirectory());

  }

  // Determine whether a link script will be used.

  bool useLinkScript = this->GlobalGenerator->GetUseLinkScript();

  bool useResponseFileForObjects =

    this->CheckUseResponseFileForObjects(linkLanguage);

  bool const useResponseFileForLibs =

    this->CheckUseResponseFileForLibraries(linkLanguage);

  // For static libraries there might be archiving rules.

  bool haveStaticLibraryRule = false;

  cmList archiveCreateCommands;

  cmList archiveAppendCommands;

  cmList archiveFinishCommands;

  std::string::size_type archiveCommandLimit = std::string::npos;

  if (this->GeneratorTarget->GetType() == cmStateEnums::STATIC_LIBRARY) {

    haveStaticLibraryRule = this->Makefile->IsDefinitionSet(linkRuleVar);

    std::string arCreateVar =

      cmStrCat("CMAKE_", linkLanguage, "_ARCHIVE_CREATE");

    arCreateVar = this->GeneratorTarget->GetFeatureSpecificLinkRuleVariable(

      arCreateVar, linkLanguage, this->GetConfigName());

    archiveCreateCommands.assign(this->Makefile->GetDefinition(arCreateVar));

    std::string arAppendVar =

      cmStrCat("CMAKE_", linkLanguage, "_ARCHIVE_APPEND");

    arAppendVar = this->GeneratorTarget->GetFeatureSpecificLinkRuleVariable(

      arAppendVar, linkLanguage, this->GetConfigName());

    archiveAppendCommands.assign(this->Makefile->GetDefinition(arAppendVar));

    std::string arFinishVar =

      cmStrCat("CMAKE_", linkLanguage, "_ARCHIVE_FINISH");

    arFinishVar = this->GeneratorTarget->GetFeatureSpecificLinkRuleVariable(

      arFinishVar, linkLanguage, this->GetConfigName());

    archiveFinishCommands.assign(this->Makefile->GetDefinition(arFinishVar));

  }

  // Decide whether to use archiving rules.

  bool useArchiveRules = !haveStaticLibraryRule &&

    !archiveCreateCommands.empty() && !archiveAppendCommands.empty();

  if (useArchiveRules) {

    // Archiving rules are always run with a link script.

    useLinkScript = true;

    // Archiving rules never use a response file.

    useResponseFileForObjects = false;

    // Limit the length of individual object lists to less than half of

    // the command line length limit (leaving half for other flags).

    // This may result in several calls to the archiver.

    if (size_t limit = cmSystemTools::CalculateCommandLineLengthLimit()) {

      archiveCommandLimit = limit / 2;

    } else {

      archiveCommandLimit = 8000;

    }

  }

  // Expand the rule variables.

  auto rulePlaceholderExpander =

    this->LocalGenerator->CreateRulePlaceholderExpander(cmBuildStep::Link);

  bool useWatcomQuote =

    this->Makefile->IsOn(linkRuleVar + "_USE_WATCOM_QUOTE");

  cmList real_link_commands;

  {

    // Set path conversion for link script shells.

    this->LocalGenerator->SetLinkScriptShell(useLinkScript);

    // Collect up flags to link in needed libraries.

    std::string linkLibs;

    if (this->GeneratorTarget->GetType() != cmStateEnums::STATIC_LIBRARY) {

      std::unique_ptr<cmLinkLineComputer> linkLineComputer =

        this->CreateLinkLineComputer(

          this->LocalGenerator,

          this->LocalGenerator->GetStateSnapshot().GetDirectory());

      linkLineComputer->SetForResponse(useResponseFileForLibs);

      linkLineComputer->SetUseWatcomQuote(useWatcomQuote);

      linkLineComputer->SetRelink(relink);

      this->CreateLinkLibs(linkLineComputer.get(), linkLibs,

                           useResponseFileForLibs, depends, linkLanguage);

    }

    // Construct object file lists that may be needed to expand the

    // rule.

    std::string buildObjs;

    this->CreateObjectLists(useLinkScript, useArchiveRules,

                            useResponseFileForObjects, buildObjs, depends,

                            useWatcomQuote, linkLanguage);

    if (!this->DeviceLinkObject.empty()) {

      buildObjs += " " +

        this->LocalGenerator->ConvertToOutputFormat(

          this->LocalGenerator->MaybeRelativeToCurBinDir(

            this->DeviceLinkObject),

          cmOutputConverter::SHELL);

    }

    std::string const& aixExports = this->GetAIXExports(this->GetConfigName());

    // maybe create .def file from list of objects

    this->GenDefFile(real_link_commands);

    std::string manifests = this->GetManifests(this->GetConfigName());

    cmRulePlaceholderExpander::RuleVariables vars;

    vars.TargetPDB = targetOutPathPDB.c_str();

    // Setup the target version.

    std::string targetVersionMajor;

    std::string targetVersionMinor;

    {

      std::ostringstream majorStream;

      std::ostringstream minorStream;

      int major;

      int minor;

      this->GeneratorTarget->GetTargetVersion(major, minor);

      majorStream << major;

      minorStream << minor;

      targetVersionMajor = majorStream.str();

      targetVersionMinor = minorStream.str();

    }

    vars.TargetVersionMajor = targetVersionMajor.c_str();

    vars.TargetVersionMinor = targetVersionMinor.c_str();

    vars.CMTargetName = this->GeneratorTarget->GetName().c_str();

    vars.CMTargetType =

      cmState::GetTargetTypeName(this->GeneratorTarget->GetType()).c_str();

    vars.Language = linkLanguage.c_str();

    vars.Linker = linker.c_str();

    vars.AIXExports = aixExports.c_str();

    vars.Objects = buildObjs.c_str();

    std::string objectDir = this->GeneratorTarget->GetSupportDirectory();

    objectDir = this->LocalGenerator->ConvertToOutputFormat(

      this->LocalGenerator->MaybeRelativeToCurBinDir(objectDir),

      cmOutputConverter::SHELL);

    vars.ObjectDir = objectDir.c_str();

    std::string targetSupportDir =

      this->GeneratorTarget->GetCMFSupportDirectory();

    targetSupportDir = this->LocalGenerator->ConvertToOutputFormat(

      this->LocalGenerator->MaybeRelativeToTopBinDir(targetSupportDir),

      cmOutputConverter::SHELL);

    vars.TargetSupportDir = targetSupportDir.c_str();

    std::string target = this->LocalGenerator->ConvertToOutputFormat(

      this->LocalGenerator->MaybeRelativeToCurBinDir(targetFullPathReal),

      cmOutputConverter::SHELL, useWatcomQuote);

    vars.Target = target.c_str();

    vars.LinkLibraries = linkLibs.c_str();

    vars.ObjectsQuoted = buildObjs.c_str();

    std::string targetOutSOName;

    if (this->GeneratorTarget->HasSOName(this->GetConfigName()) ||

        this->GeneratorTarget->IsArchivedAIXSharedLibrary()) {

      vars.SONameFlag = this->Makefile->GetSONameFlag(linkLanguage);

      targetOutSOName = this->LocalGenerator->ConvertToOutputFormat(

        this->TargetNames.SharedObject, cmOutputConverter::SHELL);

      vars.TargetSOName = targetOutSOName.c_str();

    }

    vars.LinkFlags = linkFlags.c_str();

    vars.Manifests = manifests.c_str();

    vars.Config = this->GetConfigName().c_str();

    // Compute the directory portion of the install_name setting.

    std::string install_name_dir;

    if (this->GeneratorTarget->GetType() == cmStateEnums::SHARED_LIBRARY) {

      // Get the install_name directory for the build tree.

      install_name_dir = this->GeneratorTarget->GetInstallNameDirForBuildTree(

        this->GetConfigName());

      // Set the rule variable replacement value.

      if (install_name_dir.empty()) {

        vars.TargetInstallNameDir = "";

      } else {

        // Convert to a path for the native build tool.

        install_name_dir = this->LocalGenerator->ConvertToOutputFormat(

          install_name_dir, cmOutputConverter::SHELL);

        vars.TargetInstallNameDir = install_name_dir.c_str();

      }

    }

    // Add language-specific flags.

    std::string langFlags;

    this->LocalGenerator->AddLanguageFlagsForLinking(

      langFlags, this->GeneratorTarget, linkLanguage, this->GetConfigName());

    this->LocalGenerator->AddArchitectureFlags(

      langFlags, this->GeneratorTarget, linkLanguage, this->GetConfigName());

    vars.LanguageCompileFlags = langFlags.c_str();

    std::string linkerLauncher =

      this->GetLinkerLauncher(this->GetConfigName());

    if (cmNonempty(linkerLauncher)) {

      vars.Launcher = linkerLauncher.c_str();

    }

    std::string launcher;

    std::string val = this->LocalGenerator->GetRuleLauncher(

      this->GeneratorTarget, "RULE_LAUNCH_LINK",

      this->Makefile->GetSafeDefinition("CMAKE_BUILD_TYPE"));

    if (cmNonempty(val)) {

      launcher = cmStrCat(val, ' ');

    }

    // Construct the main link rule and expand placeholders.

    rulePlaceholderExpander->SetTargetImpLib(targetOutPathImport);

    if (useArchiveRules) {

      // Construct the individual object list strings.

      std::vector<std::string> object_strings;

      this->WriteObjectsStrings(object_strings, false, archiveCommandLimit);

      // Add the cuda device object to the list of archive files. This will

      // only occur on archives which have CUDA_RESOLVE_DEVICE_SYMBOLS enabled

      if (!this->DeviceLinkObject.empty()) {

        object_strings.push_back(this->LocalGenerator->ConvertToOutputFormat(

          this->LocalGenerator->MaybeRelativeToCurBinDir(

            this->DeviceLinkObject),

          cmOutputConverter::SHELL));

      }

      // Create the archive with the first set of objects.

      auto osi = object_strings.begin();

      {

        vars.Objects = osi->c_str();

        for (std::string const& acc : archiveCreateCommands) {

          std::string cmd = launcher + acc;

          rulePlaceholderExpander->ExpandRuleVariables(this->LocalGenerator,

                                                       cmd, vars);

          real_link_commands.push_back(std::move(cmd));

        }

      }

      // Append to the archive with the other object sets.

      for (++osi; osi != object_strings.end(); ++osi) {

        vars.Objects = osi->c_str();

        for (std::string const& aac : archiveAppendCommands) {

          std::string cmd = launcher + aac;

          rulePlaceholderExpander->ExpandRuleVariables(this->LocalGenerator,

                                                       cmd, vars);