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

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

#pragma once

#include "cmConfigure.h" // IWYU pragma: keep

#include <cstddef>

#include <iosfwd>

#include <map>

#include <memory>

#include <set>

#include <string>

#include <unordered_map>

#include <utility>

#include <vector>

#include <cm/optional>

#include "cmCustomCommandTypes.h"

#include "cmDiagnostics.h"

#include "cmGeneratorOptions.h"

#include "cmGeneratorTarget.h"

#include "cmListFileCache.h"

#include "cmMessageType.h" // IWYU pragma: keep

#include "cmOutputConverter.h"

#include "cmPolicies.h"

#include "cmStateSnapshot.h"

#include "cmStateTypes.h"

#include "cmValue.h"

class cmCompiledGeneratorExpression;

class cmComputeLinkInformation;

class cmCustomCommand;

class cmCustomCommandGenerator;

class cmCustomCommandLines;

class cmGlobalGenerator;

class cmImplicitDependsList;

class cmLinkLineComputer;

class cmLinkLineDeviceComputer;

class cmMakefile;

struct cmObjectLocation;

struct cmObjectLocations;

class cmRulePlaceholderExpander;

class cmSourceFile;

class cmSourceGroup;

class cmState;

class cmTarget;

class cmake;

template <typename Iter>

class cmRange;

/** Target and source file which have a specific output.  */

struct cmSourcesWithOutput

{

  /** Target with byproduct.  */

  cmTarget* Target = nullptr;

  /** Source file with output or byproduct.  */

  cmSourceFile* Source = nullptr;

  bool SourceIsByproduct = false;

};

/** \class cmLocalGenerator

 * \brief Create required build files for a directory.

 *

 * Subclasses of this abstract class generate makefiles, DSP, etc for various

 * platforms. This class should never be constructed directly. A

 * GlobalGenerator will create it and invoke the appropriate commands on it.

 */

class cmLocalGenerator : public cmOutputConverter

{

public:

  cmLocalGenerator(cmGlobalGenerator* gg, cmMakefile* makefile);

  ~cmLocalGenerator() override;

  /**

   * Generate the makefile for this directory.

   */

  virtual void Generate() {}

  virtual void ComputeHomeRelativeOutputPath() {}

  /**

   * Calls TraceVSDependencies() on all targets of this generator.

   */

  void TraceDependencies() const;

#ifndef CMAKE_BOOTSTRAP

  /**

   * Resolve source group genex.

   */

  void ResolveSourceGroupGenex();

#endif

  virtual void AddHelperCommands() {}

  /**

   * Generate the install rules files in this directory.

   */

  void GenerateInstallRules();

  /**

   * Generate the test files for tests.

   */

  void GenerateTestFiles();

  /**

   * Generate a manifest of target files that will be built.

   */

  void ComputeTargetManifest();

  bool ComputeTargetCompileFeatures();

  bool IsRootMakefile() const;

  //! Get the makefile for this generator

  cmMakefile* GetMakefile() const { return this->Makefile; }

  //! Get the GlobalGenerator this is associated with

  cmGlobalGenerator* GetGlobalGenerator() { return this->GlobalGenerator; }

  cmGlobalGenerator const* GetGlobalGenerator() const

  {

    return this->GlobalGenerator;

  }

  virtual std::unique_ptr<cmRulePlaceholderExpander>

  CreateRulePlaceholderExpander(

    cmBuildStep buildStep = cmBuildStep::Compile) const;

  std::string GetExeExportFlags(std::string const& linkLanguage,

                                cmGeneratorTarget& tgt) const;

  cmState* GetState() const;

  cmStateSnapshot GetStateSnapshot() const;

  void AddArchitectureFlags(std::string& flags,

                            cmGeneratorTarget const* target,

                            std::string const& lang, std::string const& config,

                            std::string const& filterArch = std::string());

  void AddLanguageFlags(std::string& flags, cmGeneratorTarget const* target,

                        cmBuildStep compileOrLink, std::string const& lang,

                        std::string const& config);

  void AddLanguageFlagsForLinking(std::string& flags,

                                  cmGeneratorTarget const* target,

                                  std::string const& lang,

                                  std::string const& config);

  void AddFeatureFlags(std::string& flags, cmGeneratorTarget const* target,

                       std::string const& lang, std::string const& config);

  void AddVisibilityPresetFlags(std::string& flags,

                                cmGeneratorTarget const* target,

                                std::string const& lang);

  void AddConfigVariableFlags(std::string& flags, std::string const& var,

                              std::string const& config);

  // Handle prefixes processing (like LINKER:)

  void AddConfigVariableFlags(std::string& flags, std::string const& var,

                              cmGeneratorTarget const* target,

                              cmBuildStep compileOrLink,

                              std::string const& lang,

                              std::string const& config);

  void AddColorDiagnosticsFlags(std::string& flags, std::string const& lang);

  //! Append flags to a string.

  virtual void AppendFlags(std::string& flags,

                           std::string const& newFlags) const;

  virtual void AppendFlags(std::string& flags,

                           std::vector<BT<std::string>> const& newFlags) const;

  virtual void AppendFlagEscape(std::string& flags,

                                std::string const& rawFlag) const;

  /**

   * Append flags after parsing, prefixes processing (like LINKER:) and

   * escaping

   */

  void AppendLinkFlagsWithParsing(std::string& flags,

                                  std::string const& newFlags,

                                  cmGeneratorTarget const* target,

                                  std::string const& lang);

  void AppendFlags(std::string& flags, std::string const& newFlags,

                   std::string const& name, cmGeneratorTarget const* target,

                   cmBuildStep compileOrLink, std::string const& lang);

  void AddISPCDependencies(cmGeneratorTarget* target);

  void AddPchDependencies(cmGeneratorTarget* target);

  void AddUnityBuild(cmGeneratorTarget* target);

  virtual void AddXCConfigSources(cmGeneratorTarget* /* target */) {}

  void AddPerLanguageLinkFlags(std::string& flags,

                               cmGeneratorTarget const* target,

                               std::string const& lang,

                               std::string const& config);

  void AppendTargetCreationLinkFlags(std::string& flags,

                                     cmGeneratorTarget const* target,

                                     std::string const& linkLanguage);

  void AppendLinkerTypeFlags(std::string& flags, cmGeneratorTarget* target,

                             std::string const& config,

                             std::string const& linkLanguage);

  void AddTargetTypeLinkerFlags(std::string& flags,

                                cmGeneratorTarget const* target,

                                std::string const& lang,

                                std::string const& config);

  void AddTargetPropertyLinkFlags(std::string& flags,

                                  cmGeneratorTarget const* target,

                                  std::string const& config);

  void AppendIPOLinkerFlags(std::string& flags, cmGeneratorTarget* target,

                            std::string const& config,

                            std::string const& lang);

  void AppendPositionIndependentLinkerFlags(std::string& flags,

                                            cmGeneratorTarget* target,

                                            std::string const& config,

                                            std::string const& lang);

  void AppendWarningAsErrorLinkerFlags(std::string& flags,

                                       cmGeneratorTarget* target,

                                       std::string const& lang);

  void AppendDependencyInfoLinkerFlags(std::string& flags,

                                       cmGeneratorTarget* target,

                                       std::string const& config,

                                       std::string const& lang);

  virtual std::string GetLinkDependencyFile(cmGeneratorTarget* target,

                                            std::string const& config) const;

  void AppendModuleDefinitionFlag(std::string& flags,

                                  cmGeneratorTarget const* target,

                                  cmLinkLineComputer* linkLineComputer,

                                  std::string const& config,

                                  std::string const& lang);

  bool AppendLWYUFlags(std::string& flags, cmGeneratorTarget const* target,

                       std::string const& lang);

  //! Get the include flags for the current makefile and language

  std::string GetIncludeFlags(std::vector<std::string> const& includes,

                              cmGeneratorTarget* target,

                              std::string const& lang,

                              std::string const& config,

                              bool forResponseFile = false);

  using GeneratorTargetVector =

    std::vector<std::unique_ptr<cmGeneratorTarget>>;

  GeneratorTargetVector const& GetGeneratorTargets() const

  {

    return this->GeneratorTargets;

  }

  GeneratorTargetVector const& GetOwnedImportedGeneratorTargets() const

  {

    return this->OwnedImportedGeneratorTargets;

  }

  void AddGeneratorTarget(std::unique_ptr<cmGeneratorTarget> gt);

  void AddImportedGeneratorTarget(cmGeneratorTarget* gt);

  void AddOwnedImportedGeneratorTarget(std::unique_ptr<cmGeneratorTarget> gt);

  cmGeneratorTarget* FindLocalNonAliasGeneratorTarget(

    std::string const& name) const;

  cmGeneratorTarget* FindGeneratorTargetToUse(std::string const& name) const;

  /**

   * Process a list of include directories

   */

  void AppendIncludeDirectories(std::vector<std::string>& includes,

                                std::string const& includes_list,

                                cmSourceFile const& sourceFile) const;

  void AppendIncludeDirectories(std::vector<std::string>& includes,

                                std::vector<std::string> const& includes_vec,

                                cmSourceFile const& sourceFile) const;

  /**

   * Encode a list of preprocessor definitions for the compiler

   * command line.

   */

  void AppendDefines(std::set<std::string>& defines,

                     std::string const& defines_list) const;

  void AppendDefines(std::set<std::string>& defines,

                     std::vector<BT<std::string>> const& defines_vec) const;

  void AppendDefines(std::set<BT<std::string>>& defines,

                     std::string const& defines_list) const;

  void AppendDefines(std::set<BT<std::string>>& defines,

                     std::vector<BT<std::string>> const& defines_vec) const;

  /**

   * Encode a list of compile options for the compiler

   * command line.

   */

  void AppendCompileOptions(std::string& options,

                            std::string const& options_list,

                            char const* regex = nullptr) const;

  void AppendCompileOptions(std::string& options,

                            std::vector<std::string> const& options_vec,

                            char const* regex = nullptr) const;

  void AppendCompileOptions(std::vector<BT<std::string>>& options,

                            std::vector<BT<std::string>> const& options_vec,

                            char const* regex = nullptr) const;

  /**

   * Join a set of defines into a definesString with a space separator.

   */

  void JoinDefines(std::set<std::string> const& defines,

                   std::string& definesString, std::string const& lang);

  /** Lookup and append options associated with a particular feature.  */

  void AppendFeatureOptions(std::string& flags, std::string const& lang,

                            char const* feature);

  cmValue GetFeature(std::string const& feature, std::string const& config);

  /** \brief Get absolute path to dependency \a name

   *

   * Translate a dependency as given in CMake code to the name to

   * appear in a generated build file.

   * - If \a name is a utility target, returns false.

   * - If \a name is a CMake target, it will be transformed to the real output

   *   location of that target for the given configuration.

   * - If \a name is the full path to a file, it will be returned.

   * - Otherwise \a name is treated as a relative path with respect to

   *   the source directory of this generator.  This should only be

   *   used for dependencies of custom commands.

   */

  bool GetRealDependency(std::string const& name, std::string const& config,

                         std::string& dep, cmPolicies::PolicyStatus cmp0212);

  /** Called from command-line hook to clear dependencies.  */

  virtual void ClearDependencies(cmMakefile* /* mf */, bool /* verbose */) {}

  /** Called from command-line hook to update dependencies.  */

  virtual bool UpdateDependencies(std::string const& /* tgtInfo */,

                                  std::string const& /* targetName */,

                                  bool /*verbose*/, bool /*color*/)

  {

    return true;

  }

  /** @brief Get the include directories for the current makefile and language

   * and optional the compiler implicit include directories.

   *

   * @arg stripImplicitDirs Strip all directories found in

   *      CMAKE_<LANG>_IMPLICIT_INCLUDE_DIRECTORIES from the result.

   * @arg appendAllImplicitDirs Append all directories found in

   *      CMAKE_<LANG>_IMPLICIT_INCLUDE_DIRECTORIES to the result.

   */

  std::vector<BT<std::string>> GetIncludeDirectoriesImplicit(

    cmGeneratorTarget const* target, std::string const& lang = "C",

    std::string const& config = "", bool stripImplicitDirs = true,

    bool appendAllImplicitDirs = false) const;

  /** @brief Get the include directories for the current makefile and language

   * and optional the compiler implicit include directories.

   *

   * @arg dirs Directories are appended to this list

   */

  void GetIncludeDirectoriesImplicit(std::vector<std::string>& dirs,

                                     cmGeneratorTarget const* target,

                                     std::string const& lang = "C",

                                     std::string const& config = "",

                                     bool stripImplicitDirs = true,

                                     bool appendAllImplicitDirs = false) const;

  /** @brief Get the include directories for the current makefile and language.

   * @arg dirs Include directories are appended to this list

   */

  void GetIncludeDirectories(std::vector<std::string>& dirs,

                             cmGeneratorTarget const* target,

                             std::string const& lang = "C",

                             std::string const& config = "") const;

  /** @brief Get the include directories for the current makefile and language.

   * @return The include directory list

   */

  std::vector<BT<std::string>> GetIncludeDirectories(

    cmGeneratorTarget const* target, std::string const& lang = "C",

    std::string const& config = "") const;

  void AddCompileOptions(std::string& flags, cmGeneratorTarget* target,

                         std::string const& lang, std::string const& config);

  void AddCompileOptions(std::vector<BT<std::string>>& flags,

                         cmGeneratorTarget* target, std::string const& lang,

                         std::string const& config);

  /**

   * Add a custom PRE_BUILD, PRE_LINK, or POST_BUILD command to a target.

   */

  cmTarget* AddCustomCommandToTarget(

    std::string const& target, cmCustomCommandType type,

    std::unique_ptr<cmCustomCommand> cc,

    cmObjectLibraryCommands objLibCommands = cmObjectLibraryCommands::Reject);

  /**

   * Add a custom command to a source file.

   */

  cmSourceFile* AddCustomCommandToOutput(std::unique_ptr<cmCustomCommand> cc,

                                         bool replace = false);

  /**

   * Add a utility to the build.  A utility target is a command that is run

   * every time the target is built.

   */

  cmTarget* AddUtilityCommand(std::string const& utilityName,

                              bool excludeFromAll,

                              std::unique_ptr<cmCustomCommand> cc);

  virtual std::string CreateUtilityOutput(

    std::string const& targetName, std::vector<std::string> const& byproducts,

    cmListFileBacktrace const& bt);

  virtual std::vector<cmCustomCommandGenerator> MakeCustomCommandGenerators(

    cmCustomCommand const& cc, std::string const& config);

  std::vector<std::string> ExpandCustomCommandOutputPaths(

    cmCompiledGeneratorExpression const& cge, std::string const& config);

  std::vector<std::string> ExpandCustomCommandOutputGenex(

    std::string const& o, cmListFileBacktrace const& bt);

  /**

   * Add target byproducts.

   */

  void AddTargetByproducts(cmTarget* target,

                           std::vector<std::string> const& byproducts,

                           cmListFileBacktrace const& bt,

                           cmCommandOrigin origin);

  enum class OutputRole

  {

    Primary,

    Byproduct,

  };

  /**

   * Add source file outputs.

   */

  void AddSourceOutputs(cmSourceFile* source,

                        std::vector<std::string> const& outputs,

                        OutputRole role, cmListFileBacktrace const& bt,

                        cmCommandOrigin origin);

  /**

   * Return the target if the provided source name is a byproduct of a utility

   * target or a PRE_BUILD, PRE_LINK, or POST_BUILD command.

   * Return the source file which has the provided source name as output.

   */

  cmSourcesWithOutput GetSourcesWithOutput(std::string const& name) const;

  /**

   * Is there a source file that has the provided source name as an output?

   * If so then return it.

   */

  cmSourceFile* GetSourceFileWithOutput(

    std::string const& name,

    cmSourceOutputKind kind = cmSourceOutputKind::OutputOnly) const;

  std::string GetProjectName() const;

  /** Compute the language used to compile the given source file.  */

  std::string GetSourceFileLanguage(cmSourceFile const& source);

  // Fill the vector with the target names for the object files,

  // preprocessed files and assembly files.

  void GetIndividualFileTargets(std::vector<std::string>&) {}

  /**

   * Get the relative path from the generator output directory to a

   * per-target support directory.

   */

  virtual std::string GetTargetDirectory(

    cmGeneratorTarget const* target,

    cmStateEnums::IntermediateDirKind kind) const;

  cmPolicies::PolicyStatus GetPolicyStatus(cmPolicies::PolicyID id) const;

  cmake* GetCMakeInstance() const;

  std::string const& GetSourceDirectory() const;

  std::string const& GetBinaryDirectory() const;

  std::string const& GetCurrentBinaryDirectory() const;

  std::string const& GetCurrentSourceDirectory() const;

  bool UseShortObjectNames(

    cmStateEnums::IntermediateDirKind kind =

      cmStateEnums::IntermediateDirKind::ObjectFiles) const;

  virtual std::string GetObjectOutputRoot(

    cmStateEnums::IntermediateDirKind kind =

      cmStateEnums::IntermediateDirKind::ObjectFiles) const;

  virtual bool AlwaysUsesCMFPaths() const;

  virtual std::string GetShortObjectFileName(cmSourceFile const& source) const;

  virtual std::string ComputeShortTargetDirectory(

    cmGeneratorTarget const* gt) const;

  std::string GetCustomObjectFileName(cmSourceFile const& source) const;

  std::string GetCustomInstallObjectFileName(cmSourceFile const& source,

                                             std::string const& config,

                                             char const* custom_ext) const;

  void FillCustomInstallObjectLocations(

    cmSourceFile const& source, std::string const& config,

    char const* custom_ext,

    std::map<std::string, cmObjectLocation>& mapping) const;

  /**

   * Generate a macOS application bundle Info.plist file.

   */

  void GenerateAppleInfoPList(cmGeneratorTarget* target,

                              std::string const& targetName,

                              std::string const& fname);

  /**

   * Generate a macOS framework Info.plist file.

   */

  void GenerateFrameworkInfoPList(cmGeneratorTarget* target,

                                  std::string const& targetName,

                                  std::string const& fname);

  /** Construct a comment for a custom command.  */

  std::string ConstructComment(cmCustomCommandGenerator const& ccg,

                               char const* default_comment = "") const;

  // Computes relative path to source respective to source or binary dir.

  std::string GetRelativeSourceFileName(cmSourceFile const& source) const;

  // Compute object file names.

  std::string GetObjectFileNameWithoutTarget(

    cmSourceFile const& source, std::string const& dir_max,

    bool* hasSourceExtension = nullptr,

    char const* customOutputExtension = nullptr,

    bool const* forceShortObjectName = nullptr);

  /** Fill out the static linker flags for the given target.  */

  void GetStaticLibraryFlags(std::string& flags, std::string const& config,

                             std::string const& linkLanguage,

                             cmGeneratorTarget* target);

  std::vector<BT<std::string>> GetStaticLibraryFlags(

    std::string const& config, std::string const& linkLanguage,

    cmGeneratorTarget* target);

  /** Fill out these strings for the given target.  Libraries to link,

   *  flags, and linkflags. */

  void GetDeviceLinkFlags(cmLinkLineDeviceComputer& linkLineComputer,

                          std::string const& config, std::string& linkLibs,

                          std::string& linkFlags, std::string& frameworkPath,

                          std::string& linkPath, cmGeneratorTarget* target);

  void GetTargetFlags(cmLinkLineComputer* linkLineComputer,

                      std::string const& config, std::string& linkLibs,

                      std::string& flags, std::string& linkFlags,

                      std::string& frameworkPath, std::string& linkPath,

                      cmGeneratorTarget* target);

  void GetTargetFlags(

    cmLinkLineComputer* linkLineComputer, std::string const& config,

    std::vector<BT<std::string>>& linkLibs, std::string& flags,

    std::vector<BT<std::string>>& linkFlags, std::string& frameworkPath,

    std::vector<BT<std::string>>& linkPath, cmGeneratorTarget* target);

  void GetTargetDefines(cmGeneratorTarget const* target,

                        std::string const& config, std::string const& lang,

                        std::set<std::string>& defines) const;

  std::set<BT<std::string>> GetTargetDefines(cmGeneratorTarget const* target,

                                             std::string const& config,

                                             std::string const& lang) const;

  void GetTargetCompileFlags(cmGeneratorTarget* target,

                             std::string const& config,

                             std::string const& lang, std::string& flags,

                             std::string const& arch);

  std::vector<BT<std::string>> GetTargetCompileFlags(

    cmGeneratorTarget* target, std::string const& config,

    std::string const& lang, std::string const& arch = std::string());

  std::string GetFrameworkFlags(std::string const& l,

                                std::string const& config,

                                cmGeneratorTarget* target);

  std::string GetXcFrameworkFlags(std::string const& l,

                                  std::string const& config,

                                  cmGeneratorTarget* target);

  virtual std::string GetTargetFortranFlags(cmGeneratorTarget const* target,

                                            std::string const& config);

  virtual void ComputeObjectFilenames(

    std::map<cmSourceFile const*, cmObjectLocations>& mapping,

    std::string const& config, cmGeneratorTarget const* gt = nullptr);

  bool IsWindowsShell() const;

  bool IsWatcomWMake() const;

  bool IsMinGWMake() const;

  bool IsNMake() const;

  bool IsNinjaMulti() const;

  bool IsWindowsVSIDE() const;

  void IssueMessage(MessageType type, std::string const& text) const

  {

    this->IssueMessage(type, text, this->DirectoryBacktrace);

  }

  void IssueMessage(MessageType type, std::string const& text,

                    cmListFileBacktrace const& bt) const;

  void IssueDiagnostic(cmDiagnosticCategory category,

                       std::string const& text) const

  {

    this->IssueDiagnostic(category, text, this->DirectoryBacktrace);

  }

  void IssueDiagnostic(cmDiagnosticCategory category, std::string const& text,

                       cmListFileBacktrace const& bt) const;

  void CreateEvaluationFileOutputs();

  void CreateEvaluationFileOutputs(std::string const& config);

  void ProcessEvaluationFiles(std::vector<std::string>& generatedFiles);

  std::string GetRuleLauncher(cmGeneratorTarget* target,

                              std::string const& prop,

                              std::string const& config);

  // Return Swift_COMPILATION_MODE value if CMP0157 is NEW.

  cm::optional<cmSwiftCompileMode> GetSwiftCompileMode(

    cmGeneratorTarget const* target, std::string const& config);

  // Can we build Swift with a separate object build and link step

  // (If CMP0157 is NEW, we can do a split build)

  bool IsSplitSwiftBuild() const;

  std::string CreateSafeObjectFileName(std::string const& sin) const;

  /**

   * Build the search index from source files to source groups

   */

  void ComputeSourceGroupSearchIndex();

  /**

   * find what source group this source is in

   */

  cmSourceGroup* FindSourceGroup(std::string const& source);

protected:

  // The default implementation converts to a Windows shortpath to

  // help older toolchains handle spaces and such.  A generator may

  // override this to avoid that conversion.

  virtual std::string ConvertToIncludeReference(

    std::string const& path, cmOutputConverter::OutputFormat format);

  //! put all the libraries for a target on into the given stream

  void OutputLinkLibraries(cmComputeLinkInformation* pcli,

                           cmLinkLineComputer* linkLineComputer,

                           std::string& linkLibraries,

                           std::string& frameworkPath, std::string& linkPath);

  void OutputLinkLibraries(cmComputeLinkInformation* pcli,

                           cmLinkLineComputer* linkLineComputer,

                           std::vector<BT<std::string>>& linkLibraries,

                           std::string& frameworkPath,

                           std::vector<BT<std::string>>& linkPath);

  // Handle old-style install rules stored in the targets.

  void GenerateTargetInstallRules(

    std::ostream& os, std::string const& config,

    std::vector<std::string> const& configurationTypes);

  virtual void AddGeneratorSpecificInstallSetup(std::ostream&) {}

  std::string& CreateSafeUniqueObjectFileName(std::string const& sin,

                                              std::string const& dir_max);

  /** Check whether the native build system supports the given

      definition.  Issues a warning.  */

  virtual bool CheckDefinition(std::string const& define) const;

  cmMakefile* Makefile;

  cmListFileBacktrace DirectoryBacktrace;

  cmGlobalGenerator* GlobalGenerator;

  std::map<std::string, std::string> UniqueObjectNamesMap;

  std::string::size_type ObjectPathMax;

  std::set<std::string> ObjectMaxPathViolations;

  std::vector<std::string> EnvCPATH;

  using GeneratorTargetMap =

    std::unordered_map<std::string, cmGeneratorTarget*>;

  GeneratorTargetMap GeneratorTargetSearchIndex;

  GeneratorTargetVector GeneratorTargets;

  GeneratorTargetMap ImportedGeneratorTargets;

  GeneratorTargetVector OwnedImportedGeneratorTargets;

  std::map<std::string, std::string> AliasTargets;

  std::map<std::string, std::string> Compilers;

  std::map<std::string, std::string> VariableMappings;

  std::string CompilerSysroot;

  std::string LinkerSysroot;

  std::unordered_map<std::string, std::string> AppleArchSysroots;

  bool EmitUniversalBinaryFlags;

#if !defined(CMAKE_BOOTSTRAP)

  // Map from source file path to source group for lookup acceleration

  using SourceGroupMap = std::unordered_map<std::string, cmSourceGroup*>;

  SourceGroupMap SourceGroupSearchIndex;

#endif

private:

  /**

   * See LinearGetSourceFileWithOutput for background information

   */

  cmTarget* LinearGetTargetWithOutput(std::string const& name) const;

  /**

   * Generalized old version of GetSourceFileWithOutput kept for

   * backward-compatibility. It implements a linear search and supports

   * relative file paths. It is used as a fall back by GetSourceFileWithOutput

   * and GetSourcesWithOutput.

   */

  cmSourceFile* LinearGetSourceFileWithOutput(std::string const& name,

                                              cmSourceOutputKind kind,

                                              bool& byproduct) const;

  struct SourceEntry

  {

    cmSourcesWithOutput Sources;

  };

  // A map for fast output to input look up.

  using OutputToSourceMap = std::unordered_map<std::string, SourceEntry>;

  OutputToSourceMap OutputToSource;

  void UpdateOutputToSourceMap(std::string const& byproduct, cmTarget* target,

                               cmListFileBacktrace const& bt,

                               cmCommandOrigin origin);

  void UpdateOutputToSourceMap(std::string const& output, cmSourceFile* source,

                               OutputRole role, cmListFileBacktrace const& bt,

                               cmCommandOrigin origin);

  void AddPositionIndependentFlags(std::string& flags, std::string const& l,

                                   int targetType);

  void ComputeObjectMaxPath();

  bool AllAppleArchSysrootsAreTheSame(std::vector<std::string> const& archs,

                                      cmValue sysroot);

  void CopyPchCompilePdb(std::string const& config,

                         std::string const& language,

                         cmGeneratorTarget* target,

                         cmGeneratorTarget* reuseTarget,

                         std::vector<std::string> const& extensions);

  // Returns MSVC_DEBUG_INFORMATION_FORMAT value if CMP0141 is NEW.

  cm::optional<std::string> GetMSVCDebugFormatName(

    std::string const& config, cmGeneratorTarget const* target);

  struct UnityBatchedSource

  {

    cmSourceFile* Source = nullptr;

    std::vector<size_t> Configs;

    UnityBatchedSource(cmSourceFile* sf)

      : Source(sf)

    {

    }

  };

  struct UnitySource

  {

    std::string Path;

    bool PerConfig = false;

    UnitySource(std::string path, bool perConfig)

      : Path(std::move(path))

      , PerConfig(perConfig)

    {

    }

  };

  /** Whether to insert relative or absolute paths into unity files */

  enum class UnityPathMode

  {

    Absolute,

    Relative

  };

  UnitySource WriteUnitySource(

    cmGeneratorTarget* target, std::vector<std::string> const& configs,

    cmRange<std::vector<UnityBatchedSource>::const_iterator> sources,

    cmValue beforeInclude, cmValue afterInclude, std::string filename,

    std::string const& unityFileDirectory, UnityPathMode pathMode) const;

  void WriteUnitySourceInclude(std::ostream& unity_file,

                               cm::optional<std::string> const& cond,

                               std::string const& sf_full_path,

                               cmValue beforeInclude, cmValue afterInclude,

                               cmValue uniqueIdName, UnityPathMode pathMode,

                               std::string const& unityFileDirectory) const;

  std::vector<UnitySource> AddUnityFilesModeAuto(

    cmGeneratorTarget* target, std::string const& lang,

    std::vector<std::string> const& configs,

    std::vector<UnityBatchedSource> const& filtered_sources,

    cmValue beforeInclude, cmValue afterInclude,

    std::string const& filename_base, UnityPathMode pathMode,

    size_t batchSize);

  std::vector<UnitySource> AddUnityFilesModeGroup(

    cmGeneratorTarget* target, std::string const& lang,

    std::vector<std::string> const& configs,

    std::vector<UnityBatchedSource> const& filtered_sources,

    cmValue beforeInclude, cmValue afterInclude,

    std::string const& filename_base, UnityPathMode pathMode);

};

namespace detail {

void AddCustomCommandToTarget(cmLocalGenerator& lg, cmCommandOrigin origin,

                              cmTarget* target, cmCustomCommandType type,

                              std::unique_ptr<cmCustomCommand> cc);

cmSourceFile* AddCustomCommandToOutput(cmLocalGenerator& lg,

                                       cmCommandOrigin origin,

                                       std::unique_ptr<cmCustomCommand> cc,

                                       bool replace);

void AppendCustomCommandToOutput(cmLocalGenerator& lg,

                                 cmListFileBacktrace const& lfbt,

                                 std::string const& output,

                                 std::vector<std::string> const& depends,

                                 cmImplicitDependsList const& implicit_depends,

                                 cmCustomCommandLines const& commandLines);

void AddUtilityCommand(cmLocalGenerator& lg, cmCommandOrigin origin,

                       cmTarget* target, std::unique_ptr<cmCustomCommand> cc);

std::vector<std::string> ComputeISPCObjectSuffixes(cmGeneratorTarget* target);

std::vector<std::string> ComputeISPCExtraObjects(

  std::string const& objectName, std::string const& buildDirectory,

  std::vector<std::string> const& ispcSuffixes);

}