text: /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
     file Copyright.txt or https://cmake.org/licensing for details.  */
  #include "cmTarget.h"
  
  #include <algorithm>
  #include <cassert>
  #include <cstring>
  #include <initializer_list>
  #include <iterator>
  #include <set>
  #include <sstream>
  #include <unordered_set>
  
  #include <cm/memory>
  
  #include "cmsys/RegularExpression.hxx"
  
  #include "cmAlgorithms.h"
  #include "cmCustomCommand.h"
  #include "cmGeneratorExpression.h"
  #include "cmGeneratorTarget.h"
  #include "cmGlobalGenerator.h"
  #include "cmListFileCache.h"
  #include "cmMakefile.h"
  #include "cmMessageType.h"
  #include "cmMessenger.h"
  #include "cmProperty.h"
  #include "cmPropertyMap.h"
  #include "cmRange.h"
  #include "cmSourceFile.h"
  #include "cmSourceFileLocation.h"
  #include "cmSourceFileLocationKind.h"
  #include "cmState.h"
  #include "cmStateDirectory.h"
  #include "cmStateSnapshot.h"
  #include "cmSystemTools.h"
  #include "cmTargetPropertyComputer.h"
  #include "cmake.h"
  
  template <>
  const char* cmTargetPropertyComputer::ComputeLocationForBuild<cmTarget>(
    cmTarget const* tgt)
  {
    static std::string loc;
    if (tgt->IsImported()) {
      loc = tgt->ImportedGetFullPath("", cmStateEnums::RuntimeBinaryArtifact);
      return loc.c_str();
    }
  
    cmGlobalGenerator* gg = tgt->GetGlobalGenerator();
    if (!gg->GetConfigureDoneCMP0026()) {
      gg->CreateGenerationObjects();
    }
    cmGeneratorTarget* gt = gg->FindGeneratorTarget(tgt->GetName());
    loc = gt->GetLocationForBuild();
    return loc.c_str();
  }
  
  template <>
  const char* cmTargetPropertyComputer::ComputeLocation<cmTarget>(
    cmTarget const* tgt, const std::string& config)
  {
    static std::string loc;
    if (tgt->IsImported()) {
      loc =
        tgt->ImportedGetFullPath(config, cmStateEnums::RuntimeBinaryArtifact);
      return loc.c_str();
    }
  
    cmGlobalGenerator* gg = tgt->GetGlobalGenerator();
    if (!gg->GetConfigureDoneCMP0026()) {
      gg->CreateGenerationObjects();
    }
    cmGeneratorTarget* gt = gg->FindGeneratorTarget(tgt->GetName());
    loc = gt->GetFullPath(config, cmStateEnums::RuntimeBinaryArtifact);
    return loc.c_str();
  }
  
  template <>
  const char* cmTargetPropertyComputer::GetSources<cmTarget>(
    cmTarget const* tgt, cmMessenger* messenger,
    cmListFileBacktrace const& context)
  {
    cmStringRange entries = tgt->GetSourceEntries();
    if (entries.empty()) {
      return nullptr;
    }
  
    std::ostringstream ss;
    const char* sep = "";
    for (std::string const& entry : entries) {
      std::vector<std::string> files = cmExpandedList(entry);
      for (std::string const& file : files) {
        if (cmHasLiteralPrefix(file, "$<TARGET_OBJECTS:") &&
            file.back() == '>') {
          std::string objLibName = file.substr(17, file.size() - 18);
  
          if (cmGeneratorExpression::Find(objLibName) != std::string::npos) {
            ss << sep;
            sep = ";";
            ss << file;
            continue;
          }
  
          bool addContent = false;
          bool noMessage = true;
          std::ostringstream e;
          MessageType messageType = MessageType::AUTHOR_WARNING;
          switch (context.GetBottom().GetPolicy(cmPolicies::CMP0051)) {
            case cmPolicies::WARN:
              e << cmPolicies::GetPolicyWarning(cmPolicies::CMP0051) << "\n";
              noMessage = false;
            case cmPolicies::OLD:
              break;
            case cmPolicies::REQUIRED_ALWAYS:
            case cmPolicies::REQUIRED_IF_USED:
            case cmPolicies::NEW:
              addContent = true;
          }
          if (!noMessage) {
            e << "Target \"" << tgt->GetName()
              << "\" contains $<TARGET_OBJECTS> generator expression in its "
                 "sources list.  This content was not previously part of the "
                 "SOURCES property when that property was read at configure "
                 "time.  Code reading that property needs to be adapted to "
                 "ignore the generator expression using the string(GENEX_STRIP) "
                 "command.";
            messenger->IssueMessage(messageType, e.str(), context);
          }
          if (addContent) {
            ss << sep;
            sep = ";";
            ss << file;
          }
        } else if (cmGeneratorExpression::Find(file) == std::string::npos) {
          ss << sep;
          sep = ";";
          ss << file;
        } else {
          cmSourceFile* sf = tgt->GetMakefile()->GetOrCreateSource(file);
          // Construct what is known about this source file location.
          cmSourceFileLocation const& location = sf->GetLocation();
          std::string sname = location.GetDirectory();
          if (!sname.empty()) {
            sname += "/";
          }
          sname += location.GetName();
  
          ss << sep;
          sep = ";";
          // Append this list entry.
          ss << sname;
        }
      }
    }
    static std::string srcs;
    srcs = ss.str();
    return srcs.c_str();
  }
  
  class cmTargetInternals
  {
  public:
    cmStateEnums::TargetType TargetType;
    cmMakefile* Makefile;
    cmPolicies::PolicyMap PolicyMap;
    std::string Name;
    std::string InstallPath;
    std::string RuntimeInstallPath;
    cmPropertyMap Properties;
    bool IsGeneratorProvided;
    bool HaveInstallRule;
    bool IsDLLPlatform;
    bool IsAIX;
    bool IsAndroid;
    bool IsImportedTarget;
    bool ImportedGloballyVisible;
    bool BuildInterfaceIncludesAppended;
    std::set<BT<std::string>> Utilities;
    std::vector<cmCustomCommand> PreBuildCommands;
    std::vector<cmCustomCommand> PreLinkCommands;
    std::vector<cmCustomCommand> PostBuildCommands;
    std::vector<cmInstallTargetGenerator*> InstallGenerators;
    std::set<std::string> SystemIncludeDirectories;
    cmTarget::LinkLibraryVectorType OriginalLinkLibraries;
    std::vector<std::string> IncludeDirectoriesEntries;
    std::vector<cmListFileBacktrace> IncludeDirectoriesBacktraces;
    std::vector<std::string> CompileOptionsEntries;
    std::vector<cmListFileBacktrace> CompileOptionsBacktraces;
    std::vector<std::string> CompileFeaturesEntries;
    std::vector<cmListFileBacktrace> CompileFeaturesBacktraces;
    std::vector<std::string> CompileDefinitionsEntries;
    std::vector<cmListFileBacktrace> CompileDefinitionsBacktraces;
    std::vector<std::string> PrecompileHeadersEntries;
    std::vector<cmListFileBacktrace> PrecompileHeadersBacktraces;
    std::vector<std::string> SourceEntries;
    std::vector<cmListFileBacktrace> SourceBacktraces;
    std::vector<std::string> LinkOptionsEntries;
    std::vector<cmListFileBacktrace> LinkOptionsBacktraces;
    std::vector<std::string> LinkDirectoriesEntries;
    std::vector<cmListFileBacktrace> LinkDirectoriesBacktraces;
    std::vector<std::string> LinkImplementationPropertyEntries;
    std::vector<cmListFileBacktrace> LinkImplementationPropertyBacktraces;
    std::vector<std::pair<cmTarget::TLLSignature, cmListFileContext>>
      TLLCommands;
    cmListFileBacktrace Backtrace;
  
  public:
    bool CheckImportedLibName(std::string const& prop,
                              std::string const& value) const;
  
    std::string ProcessSourceItemCMP0049(const std::string& s);
  };
  
  cmTarget::cmTarget(std::string const& name, cmStateEnums::TargetType type,
                     Visibility vis, cmMakefile* mf)
    : impl(cm::make_unique<cmTargetInternals>())
  {
    assert(mf);
    impl->TargetType = type;
    impl->Makefile = mf;
    impl->Name = name;
    impl->IsGeneratorProvided = false;
    impl->HaveInstallRule = false;
    impl->IsDLLPlatform = false;
    impl->IsAIX = false;
    impl->IsAndroid = false;
    impl->IsImportedTarget =
      (vis == VisibilityImported || vis == VisibilityImportedGlobally);
    impl->ImportedGloballyVisible = vis == VisibilityImportedGlobally;
    impl->BuildInterfaceIncludesAppended = false;
  
    // Check whether this is a DLL platform.
    impl->IsDLLPlatform =
      !impl->Makefile->GetSafeDefinition("CMAKE_IMPORT_LIBRARY_SUFFIX").empty();
  
    // Check whether we are targeting AIX.
    impl->IsAIX =
      (impl->Makefile->GetSafeDefinition("CMAKE_SYSTEM_NAME") == "AIX");
  
    // Check whether we are targeting an Android platform.
    impl->IsAndroid =
      (impl->Makefile->GetSafeDefinition("CMAKE_SYSTEM_NAME") == "Android");
  
    std::string defKey;
    defKey.reserve(128);
    defKey += "CMAKE_";
    auto initProp = [this, mf, &defKey](const std::string& property) {
      // Replace everything after "CMAKE_"
      defKey.replace(defKey.begin() + 6, defKey.end(), property);
      if (const char* value = mf->GetDefinition(defKey)) {
        this->SetProperty(property, value);
      }
    };
    auto initPropValue = [this, mf, &defKey](const std::string& property,
                                             const char* default_value) {
      // Replace everything after "CMAKE_"
      defKey.replace(defKey.begin() + 6, defKey.end(), property);
      if (const char* value = mf->GetDefinition(defKey)) {
        this->SetProperty(property, value);
      } else if (default_value) {
        this->SetProperty(property, default_value);
      }
    };
  
    // Setup default property values.
    if (this->GetType() != cmStateEnums::INTERFACE_LIBRARY &&
        this->GetType() != cmStateEnums::UTILITY) {
      initProp("ANDROID_API");
      initProp("ANDROID_API_MIN");
      initProp("ANDROID_ARCH");
      initProp("ANDROID_STL_TYPE");
      initProp("ANDROID_SKIP_ANT_STEP");
      initProp("ANDROID_PROCESS_MAX");
      initProp("ANDROID_PROGUARD");
      initProp("ANDROID_PROGUARD_CONFIG_PATH");
      initProp("ANDROID_SECURE_PROPS_PATH");
      initProp("ANDROID_NATIVE_LIB_DIRECTORIES");
      initProp("ANDROID_NATIVE_LIB_DEPENDENCIES");
      initProp("ANDROID_JAVA_SOURCE_DIR");
      initProp("ANDROID_JAR_DIRECTORIES");
      initProp("ANDROID_JAR_DEPENDENCIES");
      initProp("ANDROID_ASSETS_DIRECTORIES");
      initProp("ANDROID_ANT_ADDITIONAL_OPTIONS");
      initProp("BUILD_RPATH");
      initProp("BUILD_RPATH_USE_ORIGIN");
      initProp("INSTALL_NAME_DIR");
      initProp("INSTALL_REMOVE_ENVIRONMENT_RPATH");
      initPropValue("INSTALL_RPATH", "");
      initPropValue("INSTALL_RPATH_USE_LINK_PATH", "OFF");
      initProp("INTERPROCEDURAL_OPTIMIZATION");
      initPropValue("SKIP_BUILD_RPATH", "OFF");
      initPropValue("BUILD_WITH_INSTALL_RPATH", "OFF");
      initProp("ARCHIVE_OUTPUT_DIRECTORY");
      initProp("LIBRARY_OUTPUT_DIRECTORY");
      initProp("RUNTIME_OUTPUT_DIRECTORY");
      initProp("PDB_OUTPUT_DIRECTORY");
      initProp("COMPILE_PDB_OUTPUT_DIRECTORY");
      initProp("FRAMEWORK");
      initProp("Fortran_FORMAT");
      initProp("Fortran_MODULE_DIRECTORY");
      initProp("Fortran_COMPILER_LAUNCHER");
      initProp("GNUtoMS");
      initProp("OSX_ARCHITECTURES");
      initProp("IOS_INSTALL_COMBINED");
      initProp("AUTOMOC");
      initProp("AUTOUIC");
      initProp("AUTORCC");
      initProp("AUTOGEN_ORIGIN_DEPENDS");
      initProp("AUTOGEN_PARALLEL");
      initProp("AUTOMOC_COMPILER_PREDEFINES");
      initProp("AUTOMOC_DEPEND_FILTERS");
      initProp("AUTOMOC_MACRO_NAMES");
      initProp("AUTOMOC_MOC_OPTIONS");
      initProp("AUTOUIC_OPTIONS");
      initProp("AUTOMOC_PATH_PREFIX");
      initProp("AUTOUIC_SEARCH_PATHS");
      initProp("AUTORCC_OPTIONS");
      initProp("LINK_DEPENDS_NO_SHARED");
      initProp("LINK_INTERFACE_LIBRARIES");
      initProp("MSVC_RUNTIME_LIBRARY");
      initProp("WIN32_EXECUTABLE");
      initProp("MACOSX_BUNDLE");
      initProp("MACOSX_RPATH");
      initProp("NO_SYSTEM_FROM_IMPORTED");
      initProp("BUILD_WITH_INSTALL_NAME_DIR");
      initProp("C_CLANG_TIDY");
      initProp("C_COMPILER_LAUNCHER");
      initProp("C_CPPLINT");
      initProp("C_CPPCHECK");
      initProp("C_INCLUDE_WHAT_YOU_USE");
      initProp("LINK_WHAT_YOU_USE");
      initProp("C_STANDARD");
      initProp("C_STANDARD_REQUIRED");
      initProp("C_EXTENSIONS");
      initProp("OBJC_STANDARD");
      initProp("OBJC_STANDARD_REQUIRED");
      initProp("OBJC_EXTENSIONS");
      initProp("CXX_CLANG_TIDY");
      initProp("CXX_COMPILER_LAUNCHER");
      initProp("CXX_CPPLINT");
      initProp("CXX_CPPCHECK");
      initProp("CXX_INCLUDE_WHAT_YOU_USE");
      initProp("CXX_STANDARD");
      initProp("CXX_STANDARD_REQUIRED");
      initProp("CXX_EXTENSIONS");
      initProp("OBJCXX_STANDARD");
      initProp("OBJCXX_STANDARD_REQUIRED");
      initProp("OBJCXX_EXTENSIONS");
      initProp("CUDA_STANDARD");
      initProp("CUDA_STANDARD_REQUIRED");
      initProp("CUDA_EXTENSIONS");
      initProp("CUDA_COMPILER_LAUNCHER");
      initProp("CUDA_SEPARABLE_COMPILATION");
      initProp("CUDA_RESOLVE_DEVICE_SYMBOLS");
      initProp("LINK_SEARCH_START_STATIC");
      initProp("LINK_SEARCH_END_STATIC");
      initProp("FOLDER");
      initProp("Swift_LANGUAGE_VERSION");
      initProp("Swift_MODULE_DIRECTORY");
      initProp("VS_JUST_MY_CODE_DEBUGGING");
      initProp("DISABLE_PRECOMPILE_HEADERS");
      initProp("UNITY_BUILD");
      initPropValue("UNITY_BUILD_BATCH_SIZE", "8");
  #ifdef __APPLE__
      if (this->GetGlobalGenerator()->IsXcode()) {
        initProp("XCODE_SCHEME_ADDRESS_SANITIZER");
        initProp("XCODE_SCHEME_ADDRESS_SANITIZER_USE_AFTER_RETURN");
        initProp("XCODE_SCHEME_DEBUG_DOCUMENT_VERSIONING");
        initProp("XCODE_SCHEME_THREAD_SANITIZER");
        initProp("XCODE_SCHEME_THREAD_SANITIZER_STOP");
        initProp("XCODE_SCHEME_UNDEFINED_BEHAVIOUR_SANITIZER");
        initProp("XCODE_SCHEME_UNDEFINED_BEHAVIOUR_SANITIZER_STOP");
        initProp("XCODE_SCHEME_DISABLE_MAIN_THREAD_CHECKER");
        initProp("XCODE_SCHEME_MAIN_THREAD_CHECKER_STOP");
        initProp("XCODE_SCHEME_MALLOC_SCRIBBLE");
        initProp("XCODE_SCHEME_MALLOC_GUARD_EDGES");
        initProp("XCODE_SCHEME_GUARD_MALLOC");
        initProp("XCODE_SCHEME_ZOMBIE_OBJECTS");
        initProp("XCODE_SCHEME_MALLOC_STACK");
        initProp("XCODE_SCHEME_DYNAMIC_LINKER_API_USAGE");
        initProp("XCODE_SCHEME_DYNAMIC_LIBRARY_LOADS");
      }
  #endif
    }
  
    if (this->GetType() != cmStateEnums::INTERFACE_LIBRARY) {
      if (this->GetGlobalGenerator()->IsXcode()) {
        initProp("XCODE_GENERATE_SCHEME");
      }
    }
  
    // Setup per-configuration property default values.
    if (this->GetType() != cmStateEnums::UTILITY) {
      static const auto configProps = {
        /* clang-format needs this comment to break after the opening brace */
        "ARCHIVE_OUTPUT_DIRECTORY_",     "LIBRARY_OUTPUT_DIRECTORY_",
        "RUNTIME_OUTPUT_DIRECTORY_",     "PDB_OUTPUT_DIRECTORY_",
        "COMPILE_PDB_OUTPUT_DIRECTORY_", "MAP_IMPORTED_CONFIG_",
        "INTERPROCEDURAL_OPTIMIZATION_"
      };
      // Collect the set of configuration types.
      std::vector<std::string> configNames;
      mf->GetConfigurations(configNames);
      for (std::string const& configName : configNames) {
        std::string configUpper = cmSystemTools::UpperCase(configName);
        for (auto const& prop : configProps) {
          // Interface libraries have no output locations, so honor only
          // the configuration map.
          if (impl->TargetType == cmStateEnums::INTERFACE_LIBRARY &&
              strcmp(prop, "MAP_IMPORTED_CONFIG_") != 0) {
            continue;
          }
          std::string property = cmStrCat(prop, configUpper);
          initProp(property);
        }
  
        // Initialize per-configuration name postfix property from the
        // variable only for non-executable targets.  This preserves
        // compatibility with previous CMake versions in which executables
        // did not support this variable.  Projects may still specify the
        // property directly.
        if (impl->TargetType != cmStateEnums::EXECUTABLE &&
            impl->TargetType != cmStateEnums::INTERFACE_LIBRARY) {
          std::string property =
            cmStrCat(cmSystemTools::UpperCase(configName), "_POSTFIX");
          initProp(property);
        }
      }
    }
  
    // Save the backtrace of target construction.
    impl->Backtrace = impl->Makefile->GetBacktrace();
  
    if (!this->IsImported()) {
      // Initialize the INCLUDE_DIRECTORIES property based on the current value
      // of the same directory property:
      cmAppend(impl->IncludeDirectoriesEntries,
               impl->Makefile->GetIncludeDirectoriesEntries());
      cmAppend(impl->IncludeDirectoriesBacktraces,
               impl->Makefile->GetIncludeDirectoriesBacktraces());
  
      {
        auto const& sysInc = impl->Makefile->GetSystemIncludeDirectories();
        impl->SystemIncludeDirectories.insert(sysInc.begin(), sysInc.end());
      }
  
      cmAppend(impl->CompileOptionsEntries,
               impl->Makefile->GetCompileOptionsEntries());
      cmAppend(impl->CompileOptionsBacktraces,
               impl->Makefile->GetCompileOptionsBacktraces());
  
      cmAppend(impl->LinkOptionsEntries,
               impl->Makefile->GetLinkOptionsEntries());
      cmAppend(impl->LinkOptionsBacktraces,
               impl->Makefile->GetLinkOptionsBacktraces());
  
      cmAppend(impl->LinkDirectoriesEntries,
               impl->Makefile->GetLinkDirectoriesEntries());
      cmAppend(impl->LinkDirectoriesBacktraces,
               impl->Makefile->GetLinkDirectoriesBacktraces());
    }
  
    if (this->GetType() != cmStateEnums::INTERFACE_LIBRARY &&
        this->GetType() != cmStateEnums::UTILITY) {
      initProp("C_VISIBILITY_PRESET");
      initProp("CXX_VISIBILITY_PRESET");
      initProp("OBJC_VISIBILITY_PRESET");
      initProp("OBJCXX_VISIBILITY_PRESET");
      initProp("CUDA_VISIBILITY_PRESET");
      initProp("VISIBILITY_INLINES_HIDDEN");
    }
  
    if (impl->TargetType == cmStateEnums::EXECUTABLE) {
      initProp("ANDROID_GUI");
      initProp("CROSSCOMPILING_EMULATOR");
      initProp("ENABLE_EXPORTS");
    }
    if (impl->TargetType == cmStateEnums::SHARED_LIBRARY ||
        impl->TargetType == cmStateEnums::MODULE_LIBRARY) {
      this->SetProperty("POSITION_INDEPENDENT_CODE", "True");
    }
    if (impl->TargetType == cmStateEnums::SHARED_LIBRARY ||
        impl->TargetType == cmStateEnums::EXECUTABLE) {
      initProp("WINDOWS_EXPORT_ALL_SYMBOLS");
    }
  
    if (this->GetType() != cmStateEnums::INTERFACE_LIBRARY &&
        this->GetType() != cmStateEnums::UTILITY) {
      initProp("POSITION_INDEPENDENT_CODE");
    }
  
    // Record current policies for later use.
    impl->Makefile->RecordPolicies(impl->PolicyMap);
  
    if (impl->TargetType == cmStateEnums::INTERFACE_LIBRARY) {
      // This policy is checked in a few conditions. The properties relevant
      // to the policy are always ignored for cmStateEnums::INTERFACE_LIBRARY
      // targets,
      // so ensure that the conditions don't lead to nonsense.
      impl->PolicyMap.Set(cmPolicies::CMP0022, cmPolicies::NEW);
    }
  
    if (this->GetType() != cmStateEnums::INTERFACE_LIBRARY &&
        this->GetType() != cmStateEnums::UTILITY) {
      initProp("JOB_POOL_COMPILE");
      initProp("JOB_POOL_LINK");
    }
  
    if (impl->TargetType <= cmStateEnums::UTILITY) {
      initProp("DOTNET_TARGET_FRAMEWORK_VERSION");
    }
  
    if (this->GetType() != cmStateEnums::INTERFACE_LIBRARY &&
        this->GetType() != cmStateEnums::UTILITY) {
  
      // check for "CMAKE_VS_GLOBALS" variable and set up target properties
      // if any
      const char* globals = mf->GetDefinition("CMAKE_VS_GLOBALS");
      if (globals) {
        const std::string genName = mf->GetGlobalGenerator()->GetName();
        if (cmHasLiteralPrefix(genName, "Visual Studio")) {
          std::vector<std::string> props = cmExpandedList(globals);
          const std::string vsGlobal = "VS_GLOBAL_";
          for (const std::string& i : props) {
            // split NAME=VALUE
            const std::string::size_type assignment = i.find('=');
            if (assignment != std::string::npos) {
              const std::string propName = vsGlobal + i.substr(0, assignment);
              const std::string propValue = i.substr(assignment + 1);
              initPropValue(propName, propValue.c_str());
            }
          }
        }
      }
    }
  }
  
  cmTarget::cmTarget(cmTarget&&) noexcept = default;
  cmTarget::~cmTarget() = default;
  
  cmTarget& cmTarget::operator=(cmTarget&&) noexcept = default;
  
  cmStateEnums::TargetType cmTarget::GetType() const
  {
    return impl->TargetType;
  }
  
  cmMakefile* cmTarget::GetMakefile() const
  {
    return impl->Makefile;
  }
  
  cmPolicies::PolicyMap const& cmTarget::GetPolicyMap() const
  {
    return impl->PolicyMap;
  }
  
  const std::string& cmTarget::GetName() const
  {
    return impl->Name;
  }
  
  cmPolicies::PolicyStatus cmTarget::GetPolicyStatus(
    cmPolicies::PolicyID policy) const
  {
    return impl->PolicyMap.Get(policy);
  }
  
  cmGlobalGenerator* cmTarget::GetGlobalGenerator() const
  {
    return impl->Makefile->GetGlobalGenerator();
  }
  
  void cmTarget::AddUtility(std::string const& name, cmMakefile* mf)
  {
    impl->Utilities.insert(
      BT<std::string>(name, mf ? mf->GetBacktrace() : cmListFileBacktrace()));
  }
  
  std::set<BT<std::string>> const& cmTarget::GetUtilities() const
  {
    return impl->Utilities;
  }
  
  cmListFileBacktrace const& cmTarget::GetBacktrace() const
  {
    return impl->Backtrace;
  }
  
  bool cmTarget::IsExecutableWithExports() const
  {
    return (this->GetType() == cmStateEnums::EXECUTABLE &&
            this->GetPropertyAsBool("ENABLE_EXPORTS"));
  }
  
  bool cmTarget::IsFrameworkOnApple() const
  {
    return ((this->GetType() == cmStateEnums::SHARED_LIBRARY ||
             this->GetType() == cmStateEnums::STATIC_LIBRARY) &&
            impl->Makefile->IsOn("APPLE") &&
            this->GetPropertyAsBool("FRAMEWORK"));
  }
  
  bool cmTarget::IsAppBundleOnApple() const
  {
    return (this->GetType() == cmStateEnums::EXECUTABLE &&
            impl->Makefile->IsOn("APPLE") &&
            this->GetPropertyAsBool("MACOSX_BUNDLE"));
  }
  
  std::vector<cmCustomCommand> const& cmTarget::GetPreBuildCommands() const
  {
    return impl->PreBuildCommands;
  }
  
  void cmTarget::AddPreBuildCommand(cmCustomCommand const& cmd)
  {
    impl->PreBuildCommands.push_back(cmd);
  }
  
  void cmTarget::AddPreBuildCommand(cmCustomCommand&& cmd)
  {
    impl->PreBuildCommands.push_back(std::move(cmd));
  }
  
  std::vector<cmCustomCommand> const& cmTarget::GetPreLinkCommands() const
  {
    return impl->PreLinkCommands;
  }
  
  void cmTarget::AddPreLinkCommand(cmCustomCommand const& cmd)
  {
    impl->PreLinkCommands.push_back(cmd);
  }
  
  void cmTarget::AddPreLinkCommand(cmCustomCommand&& cmd)
  {
    impl->PreLinkCommands.push_back(std::move(cmd));
  }
  
  std::vector<cmCustomCommand> const& cmTarget::GetPostBuildCommands() const
  {
    return impl->PostBuildCommands;
  }
  
  void cmTarget::AddPostBuildCommand(cmCustomCommand const& cmd)
  {
    impl->PostBuildCommands.push_back(cmd);
  }
  
  void cmTarget::AddPostBuildCommand(cmCustomCommand&& cmd)
  {
    impl->PostBuildCommands.push_back(std::move(cmd));
  }
  
  void cmTarget::AddTracedSources(std::vector<std::string> const& srcs)
  {
    if (!srcs.empty()) {
      cmListFileBacktrace lfbt = impl->Makefile->GetBacktrace();
      impl->SourceEntries.push_back(cmJoin(srcs, ";"));
      impl->SourceBacktraces.push_back(lfbt);
    }
  }
  
  void cmTarget::AddSources(std::vector<std::string> const& srcs)
  {
    std::string srcFiles;
    const char* sep = "";
    for (auto filename : srcs) {
      if (!cmGeneratorExpression::StartsWithGeneratorExpression(filename)) {
        if (!filename.empty()) {
          filename = impl->ProcessSourceItemCMP0049(filename);
          if (filename.empty()) {
            return;
          }
        }
        impl->Makefile->GetOrCreateSource(filename);
      }
      srcFiles += sep;
      srcFiles += filename;
      sep = ";";
    }
    if (!srcFiles.empty()) {
      cmListFileBacktrace lfbt = impl->Makefile->GetBacktrace();
      impl->SourceEntries.push_back(std::move(srcFiles));
      impl->SourceBacktraces.push_back(lfbt);
    }
  }
  
  std::string cmTargetInternals::ProcessSourceItemCMP0049(const std::string& s)
  {
    std::string src = s;
  
    // For backwards compatibility replace variables in source names.
    // This should eventually be removed.
    this->Makefile->ExpandVariablesInString(src);
    if (src != s) {
      std::ostringstream e;
      bool noMessage = false;
      MessageType messageType = MessageType::AUTHOR_WARNING;
      switch (this->Makefile->GetPolicyStatus(cmPolicies::CMP0049)) {
        case cmPolicies::WARN:
          e << cmPolicies::GetPolicyWarning(cmPolicies::CMP0049) << "\n";
          break;
        case cmPolicies::OLD:
          noMessage = true;
          break;
        case cmPolicies::REQUIRED_ALWAYS:
        case cmPolicies::REQUIRED_IF_USED:
        case cmPolicies::NEW:
          messageType = MessageType::FATAL_ERROR;
      }
      if (!noMessage) {
        e << "Legacy variable expansion in source file \"" << s
          << "\" expanded to \"" << src << "\" in target \"" << this->Name
          << "\".  This behavior will be removed in a "
             "future version of CMake.";
        this->Makefile->IssueMessage(messageType, e.str());
        if (messageType == MessageType::FATAL_ERROR) {
          return "";
        }
      }
    }
    return src;
  }
  
  std::string cmTarget::GetSourceCMP0049(const std::string& s)
  {
    return impl->ProcessSourceItemCMP0049(s);
  }
  
  struct CreateLocation
  {
    cmMakefile const* Makefile;
  
    CreateLocation(cmMakefile const* mf)
      : Makefile(mf)
    {
    }
  
    cmSourceFileLocation operator()(const std::string& filename)
    {
      return cmSourceFileLocation(this->Makefile, filename);
    }
  };
  
  struct LocationMatcher
  {
    const cmSourceFileLocation& Needle;
  
    LocationMatcher(const cmSourceFileLocation& needle)
      : Needle(needle)
    {
    }
  
    bool operator()(cmSourceFileLocation& loc)
    {
      return loc.Matches(this->Needle);
    }
  };
  
  struct TargetPropertyEntryFinder
  {
  private:
    const cmSourceFileLocation& Needle;
  
  public:
    TargetPropertyEntryFinder(const cmSourceFileLocation& needle)
      : Needle(needle)
    {
    }
  
    bool operator()(std::string const& entry)
    {
      std::vector<std::string> files = cmExpandedList(entry);
      std::vector<cmSourceFileLocation> locations;
      locations.reserve(files.size());
      std::transform(files.begin(), files.end(), std::back_inserter(locations),
                     CreateLocation(this->Needle.GetMakefile()));
  
      return std::find_if(locations.begin(), locations.end(),
                          LocationMatcher(this->Needle)) != locations.end();
    }
  };
  
  cmSourceFile* cmTarget::AddSource(const std::string& src, bool before)
  {
    cmSourceFileLocation sfl(impl->Makefile, src,
                             cmSourceFileLocationKind::Known);
    if (std::find_if(impl->SourceEntries.begin(), impl->SourceEntries.end(),
                     TargetPropertyEntryFinder(sfl)) ==
        impl->SourceEntries.end()) {
      cmListFileBacktrace lfbt = impl->Makefile->GetBacktrace();
      impl->SourceEntries.insert(
        before ? impl->SourceEntries.begin() : impl->SourceEntries.end(), src);
      impl->SourceBacktraces.insert(before ? impl->SourceBacktraces.begin()
                                           : impl->SourceBacktraces.end(),
                                    lfbt);
    }
    if (cmGeneratorExpression::Find(src) != std::string::npos) {
      return nullptr;
    }
    return impl->Makefile->GetOrCreateSource(src, false,
                                             cmSourceFileLocationKind::Known);
  }
  
  void cmTarget::ClearDependencyInformation(cmMakefile& mf)
  {
    std::string depname = cmStrCat(this->GetName(), "_LIB_DEPENDS");
    mf.RemoveCacheDefinition(depname);
  }
  
  std::string cmTarget::GetDebugGeneratorExpressions(
    const std::string& value, cmTargetLinkLibraryType llt) const
  {
    if (llt == GENERAL_LibraryType) {
      return value;
    }
  
    // Get the list of configurations considered to be DEBUG.
    std::vector<std::string> debugConfigs =
      impl->Makefile->GetCMakeInstance()->GetDebugConfigs();
  
    std::string configString = "$<CONFIG:" + debugConfigs[0] + ">";
  
    if (debugConfigs.size() > 1) {
      for (std::string const& conf : cmMakeRange(debugConfigs).advance(1)) {
        configString += ",$<CONFIG:" + conf + ">";
      }
      configString = "$<OR:" + configString + ">";
    }
  
    if (llt == OPTIMIZED_LibraryType) {
      configString = "$<NOT:" + configString + ">";
    }
    return "$<" + configString + ":" + value + ">";
  }
  
  static std::string targetNameGenex(const std::string& lib)
  {
    return "$<TARGET_NAME:" + lib + ">";
  }
  
  bool cmTarget::PushTLLCommandTrace(TLLSignature signature,
                                     cmListFileContext const& lfc)
  {
    bool ret = true;
    if (!impl->TLLCommands.empty()) {
      if (impl->TLLCommands.back().first != signature) {
        ret = false;
      }
    }
    if (impl->TLLCommands.empty() || impl->TLLCommands.back().second != lfc) {
      impl->TLLCommands.emplace_back(signature, lfc);
    }
    return ret;
  }
  
  void cmTarget::GetTllSignatureTraces(std::ostream& s, TLLSignature sig) const
  {
    const char* sigString =
      (sig == cmTarget::KeywordTLLSignature ? "keyword" : "plain");
    s << "The uses of the " << sigString << " signature are here:\n";
    cmStateDirectory cmDir = impl->Makefile->GetStateSnapshot().GetDirectory();
    for (auto const& cmd : impl->TLLCommands) {
      if (cmd.first == sig) {
        cmListFileContext lfc = cmd.second;
        lfc.FilePath = cmDir.ConvertToRelPathIfNotContained(
          impl->Makefile->GetState()->GetSourceDirectory(), lfc.FilePath);
        s << " * " << lfc << std::endl;
      }
    }
  }
  
  std::string const& cmTarget::GetInstallPath() const
  {
    return impl->InstallPath;
  }
  
  void cmTarget::SetInstallPath(std::string const& name)
  {
    impl->InstallPath = name;
  }
  
  std::string const& cmTarget::GetRuntimeInstallPath() const
  {
    return impl->RuntimeInstallPath;
  }
  
  void cmTarget::SetRuntimeInstallPath(std::string const& name)
  {
    impl->RuntimeInstallPath = name;
  }
  
  bool cmTarget::GetHaveInstallRule() const
  {
    return impl->HaveInstallRule;
  }
  
  void cmTarget::SetHaveInstallRule(bool hir)
  {
    impl->HaveInstallRule = hir;
  }
  
  void cmTarget::AddInstallGenerator(cmInstallTargetGenerator* g)
  {
    impl->InstallGenerators.emplace_back(g);
  }
  
  std::vector<cmInstallTargetGenerator*> const& cmTarget::GetInstallGenerators()
    const
  {
    return impl->InstallGenerators;
  }
  
  bool cmTarget::GetIsGeneratorProvided() const
  {
    return impl->IsGeneratorProvided;
  }
  
  void cmTarget::SetIsGeneratorProvided(bool igp)
  {
    impl->IsGeneratorProvided = igp;
  }
  
  cmTarget::LinkLibraryVectorType const& cmTarget::GetOriginalLinkLibraries()
    const
  {
    return impl->OriginalLinkLibraries;
  }
  
  void cmTarget::AddLinkLibrary(cmMakefile& mf, const std::string& lib,
                                cmTargetLinkLibraryType llt)
  {
    this->AddLinkLibrary(mf, lib, lib, llt);
  }
  
  void cmTarget::AddLinkLibrary(cmMakefile& mf, std::string const& lib,
                                std::string const& libRef,
                                cmTargetLinkLibraryType llt)
  {
    cmTarget* tgt = mf.FindTargetToUse(lib);
    {
      const bool isNonImportedTarget = tgt && !tgt->IsImported();
  
      const std::string libName =
        (isNonImportedTarget && llt != GENERAL_LibraryType)
        ? targetNameGenex(libRef)
        : libRef;
      this->AppendProperty(
        "LINK_LIBRARIES",
        this->GetDebugGeneratorExpressions(libName, llt).c_str());
    }
  
    if (cmGeneratorExpression::Find(lib) != std::string::npos || lib != libRef ||
        (tgt &&
         (tgt->GetType() == cmStateEnums::INTERFACE_LIBRARY ||
          tgt->GetType() == cmStateEnums::OBJECT_LIBRARY)) ||
        (impl->Name == lib)) {
      return;
    }
  
    impl->OriginalLinkLibraries.emplace_back(lib, llt);
  
    // Add the explicit dependency information for libraries. This is
    // simply a set of libraries separated by ";". There should always
    // be a trailing ";". These library names are not canonical, in that
    // they may be "-framework x", "-ly", "/path/libz.a", etc.
    // We shouldn't remove duplicates here because external libraries
    // may be purposefully duplicated to handle recursive dependencies,
    // and we removing one instance will break the link line. Duplicates
    // will be appropriately eliminated at emit time.
    if (impl->TargetType >= cmStateEnums::STATIC_LIBRARY &&
        impl->TargetType <= cmStateEnums::MODULE_LIBRARY &&
        (this->GetPolicyStatusCMP0073() == cmPolicies::OLD ||
         this->GetPolicyStatusCMP0073() == cmPolicies::WARN)) {
      std::string targetEntry = cmStrCat(impl->Name, "_LIB_DEPENDS");
      std::string dependencies;
      const char* old_val = mf.GetDefinition(targetEntry);
      if (old_val) {
        dependencies += old_val;
      }
      switch (llt) {
        case GENERAL_LibraryType:
          dependencies += "general";
          break;
        case DEBUG_LibraryType:
          dependencies += "debug";
          break;
        case OPTIMIZED_LibraryType:
          dependencies += "optimized";
          break;
      }
      dependencies += ";";
      dependencies += lib;
      dependencies += ";";
      mf.AddCacheDefinition(targetEntry, dependencies.c_str(),
                            "Dependencies for the target", cmStateEnums::STATIC);
    }
  }
  
  void cmTarget::AddSystemIncludeDirectories(const std::set<std::string>& incs)
  {
    impl->SystemIncludeDirectories.insert(incs.begin(), incs.end());
  }
  
  std::set<std::string> const& cmTarget::GetSystemIncludeDirectories() const
  {
    return impl->SystemIncludeDirectories;
  }
  
  cmStringRange cmTarget::GetIncludeDirectoriesEntries() const
  {
    return cmMakeRange(impl->IncludeDirectoriesEntries);
  }
  
  cmBacktraceRange cmTarget::GetIncludeDirectoriesBacktraces() const
  {
    return cmMakeRange(impl->IncludeDirectoriesBacktraces);
  }
  
  cmStringRange cmTarget::GetCompileOptionsEntries() const
  {
    return cmMakeRange(impl->CompileOptionsEntries);
  }
  
  cmBacktraceRange cmTarget::GetCompileOptionsBacktraces() const
  {
    return cmMakeRange(impl->CompileOptionsBacktraces);
  }
  
  cmStringRange cmTarget::GetCompileFeaturesEntries() const
  {
    return cmMakeRange(impl->CompileFeaturesEntries);
  }
  
  cmBacktraceRange cmTarget::GetCompileFeaturesBacktraces() const
  {
    return cmMakeRange(impl->CompileFeaturesBacktraces);
  }
  
  cmStringRange cmTarget::GetCompileDefinitionsEntries() const
  {
    return cmMakeRange(impl->CompileDefinitionsEntries);
  }
  
  cmBacktraceRange cmTarget::GetCompileDefinitionsBacktraces() const
  {
    return cmMakeRange(impl->CompileDefinitionsBacktraces);
  }
  
  cmStringRange cmTarget::GetPrecompileHeadersEntries() const
  {
    return cmMakeRange(impl->PrecompileHeadersEntries);
  }
  
  cmBacktraceRange cmTarget::GetPrecompileHeadersBacktraces() const
  {
    return cmMakeRange(impl->PrecompileHeadersBacktraces);
  }
  
  cmStringRange cmTarget::GetSourceEntries() const
  {
    return cmMakeRange(impl->SourceEntries);
  }
  
  cmBacktraceRange cmTarget::GetSourceBacktraces() const
  {
    return cmMakeRange(impl->SourceBacktraces);
  }
  
  cmStringRange cmTarget::GetLinkOptionsEntries() const
  {
    return cmMakeRange(impl->LinkOptionsEntries);
  }
  
  cmBacktraceRange cmTarget::GetLinkOptionsBacktraces() const
  {
    return cmMakeRange(impl->LinkOptionsBacktraces);
  }
  
  cmStringRange cmTarget::GetLinkDirectoriesEntries() const
  {
    return cmMakeRange(impl->LinkDirectoriesEntries);
  }
  
  cmBacktraceRange cmTarget::GetLinkDirectoriesBacktraces() const
  {
    return cmMakeRange(impl->LinkDirectoriesBacktraces);
  }
  
  cmStringRange cmTarget::GetLinkImplementationEntries() const
  {
    return cmMakeRange(impl->LinkImplementationPropertyEntries);
  }
  
  cmBacktraceRange cmTarget::GetLinkImplementationBacktraces() const
  {
    return cmMakeRange(impl->LinkImplementationPropertyBacktraces);
  }
  
  void cmTarget::SetProperty(const std::string& prop, const char* value)
  {
    if (!cmTargetPropertyComputer::PassesWhitelist(
          this->GetType(), prop, impl->Makefile->GetMessenger(),
          impl->Makefile->GetBacktrace())) {
      return;
    }
  #define MAKE_STATIC_PROP(PROP) static const std::string prop##PROP = #PROP
    MAKE_STATIC_PROP(COMPILE_DEFINITIONS);
    MAKE_STATIC_PROP(COMPILE_FEATURES);
    MAKE_STATIC_PROP(COMPILE_OPTIONS);
    MAKE_STATIC_PROP(PRECOMPILE_HEADERS);
    MAKE_STATIC_PROP(PRECOMPILE_HEADERS_REUSE_FROM);
    MAKE_STATIC_PROP(CUDA_PTX_COMPILATION);
    MAKE_STATIC_PROP(EXPORT_NAME);
    MAKE_STATIC_PROP(IMPORTED_GLOBAL);
    MAKE_STATIC_PROP(INCLUDE_DIRECTORIES);
    MAKE_STATIC_PROP(LINK_OPTIONS);
    MAKE_STATIC_PROP(LINK_DIRECTORIES);
    MAKE_STATIC_PROP(LINK_LIBRARIES);
    MAKE_STATIC_PROP(MANUALLY_ADDED_DEPENDENCIES);
    MAKE_STATIC_PROP(NAME);
    MAKE_STATIC_PROP(SOURCES);
    MAKE_STATIC_PROP(TYPE);
  #undef MAKE_STATIC_PROP
    if (prop == propMANUALLY_ADDED_DEPENDENCIES) {
      impl->Makefile->IssueMessage(
        MessageType::FATAL_ERROR,
        "MANUALLY_ADDED_DEPENDENCIES property is read-only\n");
      return;
    }
    if (prop == propNAME) {
      impl->Makefile->IssueMessage(MessageType::FATAL_ERROR,
                                   "NAME property is read-only\n");
      return;
    }
    if (prop == propTYPE) {
      impl->Makefile->IssueMessage(MessageType::FATAL_ERROR,
                                   "TYPE property is read-only\n");
      return;
    }
    if (prop == propEXPORT_NAME && this->IsImported()) {
      std::ostringstream e;
      e << "EXPORT_NAME property can't be set on imported targets (\""
        << impl->Name << "\")\n";
      impl->Makefile->IssueMessage(MessageType::FATAL_ERROR, e.str());
      return;
    }
    if (prop == propSOURCES && this->IsImported()) {
      std::ostringstream e;
      e << "SOURCES property can't be set on imported targets (\"" << impl->Name
        << "\")\n";
      impl->Makefile->IssueMessage(MessageType::FATAL_ERROR, e.str());
      return;
    }
    if (prop == propIMPORTED_GLOBAL && !this->IsImported()) {
      std::ostringstream e;
      e << "IMPORTED_GLOBAL property can't be set on non-imported targets (\""
        << impl->Name << "\")\n";
      impl->Makefile->IssueMessage(MessageType::FATAL_ERROR, e.str());
      return;
    }
  
    if (prop == propINCLUDE_DIRECTORIES) {
      impl->IncludeDirectoriesEntries.clear();
      impl->IncludeDirectoriesBacktraces.clear();
      if (value) {
        impl->IncludeDirectoriesEntries.emplace_back(value);
        cmListFileBacktrace lfbt = impl->Makefile->GetBacktrace();
        impl->IncludeDirectoriesBacktraces.push_back(lfbt);
      }
    } else if (prop == propCOMPILE_OPTIONS) {
      impl->CompileOptionsEntries.clear();
      impl->CompileOptionsBacktraces.clear();
      if (value) {
        impl->CompileOptionsEntries.emplace_back(value);
        cmListFileBacktrace lfbt = impl->Makefile->GetBacktrace();
        impl->CompileOptionsBacktraces.push_back(lfbt);
      }
    } else if (prop == propCOMPILE_FEATURES) {
      impl->CompileFeaturesEntries.clear();
      impl->CompileFeaturesBacktraces.clear();
      if (value) {
        impl->CompileFeaturesEntries.emplace_back(value);
        cmListFileBacktrace lfbt = impl->Makefile->GetBacktrace();
        impl->CompileFeaturesBacktraces.push_back(lfbt);
      }
    } else if (prop == propCOMPILE_DEFINITIONS) {
      impl->CompileDefinitionsEntries.clear();
      impl->CompileDefinitionsBacktraces.clear();
      if (value) {
        impl->CompileDefinitionsEntries.emplace_back(value);
        cmListFileBacktrace lfbt = impl->Makefile->GetBacktrace();
        impl->CompileDefinitionsBacktraces.push_back(lfbt);
      }
    } else if (prop == propLINK_OPTIONS) {
      impl->LinkOptionsEntries.clear();
      impl->LinkOptionsBacktraces.clear();
      if (value) {
        impl->LinkOptionsEntries.emplace_back(value);
        cmListFileBacktrace lfbt = impl->Makefile->GetBacktrace();
        impl->LinkOptionsBacktraces.push_back(lfbt);
      }
    } else if (prop == propLINK_DIRECTORIES) {
      impl->LinkDirectoriesEntries.clear();
      impl->LinkDirectoriesBacktraces.clear();
      if (value) {
        impl->LinkDirectoriesEntries.emplace_back(value);
        cmListFileBacktrace lfbt = impl->Makefile->GetBacktrace();
        impl->LinkDirectoriesBacktraces.push_back(lfbt);
      }
    } else if (prop == propPRECOMPILE_HEADERS) {
      impl->PrecompileHeadersEntries.clear();
      impl->PrecompileHeadersBacktraces.clear();
      if (value) {
        impl->PrecompileHeadersEntries.emplace_back(value);
        cmListFileBacktrace lfbt = impl->Makefile->GetBacktrace();
        impl->PrecompileHeadersBacktraces.push_back(lfbt);
      }
    } else if (prop == propLINK_LIBRARIES) {
      impl->LinkImplementationPropertyEntries.clear();
      impl->LinkImplementationPropertyBacktraces.clear();
      if (value) {
        cmListFileBacktrace lfbt = impl->Makefile->GetBacktrace();
        impl->LinkImplementationPropertyEntries.emplace_back(value);
        impl->LinkImplementationPropertyBacktraces.push_back(lfbt);
      }
    } else if (prop == propSOURCES) {
      impl->SourceEntries.clear();
      impl->SourceBacktraces.clear();
      if (value) {
        cmListFileBacktrace lfbt = impl->Makefile->GetBacktrace();
        impl->SourceEntries.emplace_back(value);
        impl->SourceBacktraces.push_back(lfbt);
      }
    } else if (prop == propIMPORTED_GLOBAL) {
      if (!cmIsOn(value)) {
        std::ostringstream e;
        e << "IMPORTED_GLOBAL property can't be set to FALSE on targets (\""
          << impl->Name << "\")\n";
        impl->Makefile->IssueMessage(MessageType::FATAL_ERROR, e.str());
        return;
      }
      /* no need to change anything if value does not change */
      if (!impl->ImportedGloballyVisible) {
        impl->ImportedGloballyVisible = true;
        this->GetGlobalGenerator()->IndexTarget(this);
      }
    } else if (cmHasLiteralPrefix(prop, "IMPORTED_LIBNAME") &&
               !impl->CheckImportedLibName(prop, value ? value : "")) {
      /* error was reported by check method */
    } else if (prop == propCUDA_PTX_COMPILATION &&
               this->GetType() != cmStateEnums::OBJECT_LIBRARY) {
      std::ostringstream e;
      e << "CUDA_PTX_COMPILATION property can only be applied to OBJECT "
           "targets (\""
        << impl->Name << "\")\n";
      impl->Makefile->IssueMessage(MessageType::FATAL_ERROR, e.str());
      return;
    } else if (prop == propPRECOMPILE_HEADERS_REUSE_FROM) {
      if (this->GetProperty("PRECOMPILE_HEADERS")) {
        std::ostringstream e;
        e << "PRECOMPILE_HEADERS property is already set on target (\""
          << impl->Name << "\")\n";
        impl->Makefile->IssueMessage(MessageType::FATAL_ERROR, e.str());
        return;
      }
      auto reusedTarget =
        impl->Makefile->GetCMakeInstance()->GetGlobalGenerator()->FindTarget(
          value);
      if (!reusedTarget) {
        const std::string e(
          "PRECOMPILE_HEADERS_REUSE_FROM set with non existing target");
        impl->Makefile->IssueMessage(MessageType::FATAL_ERROR, e);
        return;
      }
  
      std::string reusedFrom = reusedTarget->GetSafeProperty(prop);
      if (reusedFrom.empty()) {
        reusedFrom = value;
      }
  
      impl->Properties.SetProperty(prop, reusedFrom.c_str());
  
      reusedTarget->SetProperty("COMPILE_PDB_NAME", reusedFrom.c_str());
      reusedTarget->SetProperty("COMPILE_PDB_OUTPUT_DIRECTORY",
                                cmStrCat(reusedFrom, ".dir/").c_str());
  
      this->SetProperty("COMPILE_PDB_NAME",
                        reusedTarget->GetProperty("COMPILE_PDB_NAME"));
      this->AddUtility(reusedFrom, impl->Makefile);
    } else {
      impl->Properties.SetProperty(prop, value);
    }
  }
  
  void cmTarget::AppendProperty(const std::string& prop, const char* value,
                                bool asString)
  {
    if (!cmTargetPropertyComputer::PassesWhitelist(
          this->GetType(), prop, impl->Makefile->GetMessenger(),
          impl->Makefile->GetBacktrace())) {
      return;
    }
    if (prop == "NAME") {
      impl->Makefile->IssueMessage(MessageType::FATAL_ERROR,
                                   "NAME property is read-only\n");
      return;
    }
    if (prop == "EXPORT_NAME" && this->IsImported()) {
      std::ostringstream e;
      e << "EXPORT_NAME property can't be set on imported targets (\""
        << impl->Name << "\")\n";
      impl->Makefile->IssueMessage(MessageType::FATAL_ERROR, e.str());
      return;
    }
    if (prop == "SOURCES" && this->IsImported()) {
      std::ostringstream e;
      e << "SOURCES property can't be set on imported targets (\"" << impl->Name
        << "\")\n";
      impl->Makefile->IssueMessage(MessageType::FATAL_ERROR, e.str());
      return;
    }
    if (prop == "IMPORTED_GLOBAL") {
      std::ostringstream e;
      e << "IMPORTED_GLOBAL property can't be appended, only set on imported "
           "targets (\""
        << impl->Name << "\")\n";
      impl->Makefile->IssueMessage(MessageType::FATAL_ERROR, e.str());
      return;
    }
    if (prop == "INCLUDE_DIRECTORIES") {
      if (value && *value) {
        impl->IncludeDirectoriesEntries.emplace_back(value);
        cmListFileBacktrace lfbt = impl->Makefile->GetBacktrace();
        impl->IncludeDirectoriesBacktraces.push_back(lfbt);
      }
    } else if (prop == "COMPILE_OPTIONS") {
      if (value && *value) {
        impl->CompileOptionsEntries.emplace_back(value);
        cmListFileBacktrace lfbt = impl->Makefile->GetBacktrace();
        impl->CompileOptionsBacktraces.push_back(lfbt);
      }
    } else if (prop == "COMPILE_FEATURES") {
      if (value && *value) {
        impl->CompileFeaturesEntries.emplace_back(value);
        cmListFileBacktrace lfbt = impl->Makefile->GetBacktrace();
        impl->CompileFeaturesBacktraces.push_back(lfbt);
      }
    } else if (prop == "COMPILE_DEFINITIONS") {
      if (value && *value) {
        impl->CompileDefinitionsEntries.emplace_back(value);
        cmListFileBacktrace lfbt = impl->Makefile->GetBacktrace();
        impl->CompileDefinitionsBacktraces.push_back(lfbt);
      }
    } else if (prop == "LINK_OPTIONS") {
      if (value && *value) {
        impl->LinkOptionsEntries.emplace_back(value);
        cmListFileBacktrace lfbt = impl->Makefile->GetBacktrace();
        impl->LinkOptionsBacktraces.push_back(lfbt);
      }
    } else if (prop == "LINK_DIRECTORIES") {
      if (value && *value) {
        impl->LinkDirectoriesEntries.emplace_back(value);
        cmListFileBacktrace lfbt = impl->Makefile->GetBacktrace();
        impl->LinkDirectoriesBacktraces.push_back(lfbt);
      }
    } else if (prop == "PRECOMPILE_HEADERS") {
      if (this->GetProperty("PRECOMPILE_HEADERS_REUSE_FROM")) {
        std::ostringstream e;
        e << "PRECOMPILE_HEADERS_REUSE_FROM property is already set on target "
             "(\""
          << impl->Name << "\")\n";
        impl->Makefile->IssueMessage(MessageType::FATAL_ERROR, e.str());
        return;
      }
      if (value && *value) {
        impl->PrecompileHeadersEntries.emplace_back(value);
        cmListFileBacktrace lfbt = impl->Makefile->GetBacktrace();
        impl->PrecompileHeadersBacktraces.push_back(lfbt);
      }
    } else if (prop == "LINK_LIBRARIES") {
      if (value && *value) {
        cmListFileBacktrace lfbt = impl->Makefile->GetBacktrace();
        impl->LinkImplementationPropertyEntries.emplace_back(value);
        impl->LinkImplementationPropertyBacktraces.push_back(lfbt);
      }
    } else if (prop == "SOURCES") {
      cmListFileBacktrace lfbt = impl->Makefile->GetBacktrace();
      impl->SourceEntries.emplace_back(value);
      impl->SourceBacktraces.push_back(lfbt);
    } else if (cmHasLiteralPrefix(prop, "IMPORTED_LIBNAME")) {
      impl->Makefile->IssueMessage(MessageType::FATAL_ERROR,
                                   prop + " property may not be APPENDed.");
    } else {
      impl->Properties.AppendProperty(prop, value, asString);
    }
  }
  
  void cmTarget::AppendBuildInterfaceIncludes()
  {
    if (this->GetType() != cmStateEnums::SHARED_LIBRARY &&
        this->GetType() != cmStateEnums::STATIC_LIBRARY &&
        this->GetType() != cmStateEnums::MODULE_LIBRARY &&
        this->GetType() != cmStateEnums::INTERFACE_LIBRARY &&
        !this->IsExecutableWithExports()) {
      return;
    }
    if (impl->BuildInterfaceIncludesAppended) {
      return;
    }
    impl->BuildInterfaceIncludesAppended = true;
  
    if (impl->Makefile->IsOn("CMAKE_INCLUDE_CURRENT_DIR_IN_INTERFACE")) {
      std::string dirs = impl->Makefile->GetCurrentBinaryDirectory();
      if (!dirs.empty()) {
        dirs += ';';
      }
      dirs += impl->Makefile->GetCurrentSourceDirectory();
      if (!dirs.empty()) {
        this->AppendProperty("INTERFACE_INCLUDE_DIRECTORIES",
                             ("$<BUILD_INTERFACE:" + dirs + ">").c_str());
      }
    }
  }
  
  void cmTarget::InsertInclude(std::string const& entry,
                               cmListFileBacktrace const& bt, bool before)
  {
    auto position = before ? impl->IncludeDirectoriesEntries.begin()
                           : impl->IncludeDirectoriesEntries.end();
  
    auto btPosition = before ? impl->IncludeDirectoriesBacktraces.begin()
                             : impl->IncludeDirectoriesBacktraces.end();
  
    impl->IncludeDirectoriesEntries.insert(position, entry);
    impl->IncludeDirectoriesBacktraces.insert(btPosition, bt);
  }
  
  void cmTarget::InsertCompileOption(std::string const& entry,
                                     cmListFileBacktrace const& bt, bool before)
  {
    auto position = before ? impl->CompileOptionsEntries.begin()
                           : impl->CompileOptionsEntries.end();
  
    auto btPosition = before ? impl->CompileOptionsBacktraces.begin()
                             : impl->CompileOptionsBacktraces.end();
  
    impl->CompileOptionsEntries.insert(position, entry);
    impl->CompileOptionsBacktraces.insert(btPosition, bt);
  }
  
  void cmTarget::InsertCompileDefinition(std::string const& entry,
                                         cmListFileBacktrace const& bt)
  {
    impl->CompileDefinitionsEntries.push_back(entry);
    impl->CompileDefinitionsBacktraces.push_back(bt);
  }
  
  void cmTarget::InsertLinkOption(std::string const& entry,
                                  cmListFileBacktrace const& bt, bool before)
  {
    auto position =
      before ? impl->LinkOptionsEntries.begin() : impl->LinkOptionsEntries.end();
  
    auto btPosition = before ? impl->LinkOptionsBacktraces.begin()
                             : impl->LinkOptionsBacktraces.end();
  
    impl->LinkOptionsEntries.insert(position, entry);
    impl->LinkOptionsBacktraces.insert(btPosition, bt);
  }
  
  void cmTarget::InsertLinkDirectory(std::string const& entry,
                                     cmListFileBacktrace const& bt, bool before)
  {
    auto position = before ? impl->LinkDirectoriesEntries.begin()
                           : impl->LinkDirectoriesEntries.end();
  
    auto btPosition = before ? impl->LinkDirectoriesBacktraces.begin()
                             : impl->LinkDirectoriesBacktraces.end();
  
    impl->LinkDirectoriesEntries.insert(position, entry);
    impl->LinkDirectoriesBacktraces.insert(btPosition, bt);
  }
  
  void cmTarget::InsertPrecompileHeader(std::string const& entry,
                                        cmListFileBacktrace const& bt)
  {
    impl->PrecompileHeadersEntries.push_back(entry);
    impl->PrecompileHeadersBacktraces.push_back(bt);
  }
  
  static void cmTargetCheckLINK_INTERFACE_LIBRARIES(const std::string& prop,
                                                    const char* value,
                                                    cmMakefile* context,
                                                    bool imported)
  {
    // Look for link-type keywords in the value.
    static cmsys::RegularExpression keys("(^|;)(debug|optimized|general)(;|$)");
    if (!keys.find(value)) {
      return;
    }
  
    // Support imported and non-imported versions of the property.
    const char* base = (imported ? "IMPORTED_LINK_INTERFACE_LIBRARIES"
                                 : "LINK_INTERFACE_LIBRARIES");
  
    // Report an error.
    std::ostringstream e;
    e << "Property " << prop << " may not contain link-type keyword \""
      << keys.match(2) << "\".  "
      << "The " << base << " property has a per-configuration "
      << "version called " << base << "_<CONFIG> which may be "
      << "used to specify per-configuration rules.";
    if (!imported) {
      e << "  "
        << "Alternatively, an IMPORTED library may be created, configured "
        << "with a per-configuration location, and then named in the "
        << "property value.  "
        << "See the add_library command's IMPORTED mode for details."
        << "\n"
        << "If you have a list of libraries that already contains the "
        << "keyword, use the target_link_libraries command with its "
        << "LINK_INTERFACE_LIBRARIES mode to set the property.  "
        << "The command automatically recognizes link-type keywords and sets "
        << "the LINK_INTERFACE_LIBRARIES and LINK_INTERFACE_LIBRARIES_DEBUG "
        << "properties accordingly.";
    }
    context->IssueMessage(MessageType::FATAL_ERROR, e.str());
  }
  
  static void cmTargetCheckINTERFACE_LINK_LIBRARIES(const char* value,
                                                    cmMakefile* context)
  {
    // Look for link-type keywords in the value.
    static cmsys::RegularExpression keys("(^|;)(debug|optimized|general)(;|$)");
    if (!keys.find(value)) {
      return;
    }
  
    // Report an error.
    std::ostringstream e;
  
    e << "Property INTERFACE_LINK_LIBRARIES may not contain link-type "
         "keyword \""
      << keys.match(2)
      << "\".  The INTERFACE_LINK_LIBRARIES "
         "property may contain configuration-sensitive generator-expressions "
         "which may be used to specify per-configuration rules.";
  
    context->IssueMessage(MessageType::FATAL_ERROR, e.str());
  }
  
  static void cmTargetCheckIMPORTED_GLOBAL(const cmTarget* target,
                                           cmMakefile* context)
  {
    std::vector<cmTarget*> targets = context->GetOwnedImportedTargets();
    auto it = std::find(targets.begin(), targets.end(), target);
    if (it == targets.end()) {
      std::ostringstream e;
      e << "Attempt to promote imported target \"" << target->GetName()
        << "\" to global scope (by setting IMPORTED_GLOBAL) "
           "which is not built in this directory.";
      context->IssueMessage(MessageType::FATAL_ERROR, e.str());
    }
  }
  
  void cmTarget::CheckProperty(const std::string& prop,
                               cmMakefile* context) const
  {
    // Certain properties need checking.
    if (cmHasLiteralPrefix(prop, "LINK_INTERFACE_LIBRARIES")) {
      if (const char* value = this->GetProperty(prop)) {
        cmTargetCheckLINK_INTERFACE_LIBRARIES(prop, value, context, false);
      }
    }
    if (cmHasLiteralPrefix(prop, "IMPORTED_LINK_INTERFACE_LIBRARIES")) {
      if (const char* value = this->GetProperty(prop)) {
        cmTargetCheckLINK_INTERFACE_LIBRARIES(prop, value, context, true);
      }
    }
    if (prop == "INTERFACE_LINK_LIBRARIES") {
      if (const char* value = this->GetProperty(prop)) {
        cmTargetCheckINTERFACE_LINK_LIBRARIES(value, context);
      }
    }
    if (prop == "IMPORTED_GLOBAL") {
      if (this->IsImported()) {
        cmTargetCheckIMPORTED_GLOBAL(this, context);
      }
    }
  }
  
  const char* cmTarget::GetComputedProperty(
    const std::string& prop, cmMessenger* messenger,
    cmListFileBacktrace const& context) const
  {
    return cmTargetPropertyComputer::GetProperty(this, prop, messenger, context);
  }
  
  const char* cmTarget::GetProperty(const std::string& prop) const
  {
  #define MAKE_STATIC_PROP(PROP) static const std::string prop##PROP = #PROP
    MAKE_STATIC_PROP(LINK_LIBRARIES);
    MAKE_STATIC_PROP(TYPE);
    MAKE_STATIC_PROP(INCLUDE_DIRECTORIES);
    MAKE_STATIC_PROP(COMPILE_FEATURES);
    MAKE_STATIC_PROP(COMPILE_OPTIONS);
    MAKE_STATIC_PROP(COMPILE_DEFINITIONS);
    MAKE_STATIC_PROP(LINK_OPTIONS);
    MAKE_STATIC_PROP(LINK_DIRECTORIES);
    MAKE_STATIC_PROP(PRECOMPILE_HEADERS);
    MAKE_STATIC_PROP(IMPORTED);
    MAKE_STATIC_PROP(IMPORTED_GLOBAL);
    MAKE_STATIC_PROP(MANUALLY_ADDED_DEPENDENCIES);
    MAKE_STATIC_PROP(NAME);
    MAKE_STATIC_PROP(BINARY_DIR);
    MAKE_STATIC_PROP(SOURCE_DIR);
    MAKE_STATIC_PROP(SOURCES);
  #undef MAKE_STATIC_PROP
    static std::unordered_set<std::string> const specialProps{
      propLINK_LIBRARIES,
      propTYPE,
      propINCLUDE_DIRECTORIES,
      propCOMPILE_FEATURES,
      propCOMPILE_OPTIONS,
      propCOMPILE_DEFINITIONS,
      propPRECOMPILE_HEADERS,
      propLINK_OPTIONS,
      propLINK_DIRECTORIES,
      propIMPORTED,
      propIMPORTED_GLOBAL,
      propMANUALLY_ADDED_DEPENDENCIES,
      propNAME,
      propBINARY_DIR,
      propSOURCE_DIR,
      propSOURCES
    };
    if (specialProps.count(prop)) {
      if (prop == propLINK_LIBRARIES) {
        if (impl->LinkImplementationPropertyEntries.empty()) {
          return nullptr;
        }
  
        static std::string output;
        output = cmJoin(impl->LinkImplementationPropertyEntries, ";");
        return output.c_str();
      }
      // the type property returns what type the target is
      if (prop == propTYPE) {
        return cmState::GetTargetTypeName(this->GetType());
      }
      if (prop == propINCLUDE_DIRECTORIES) {
        if (impl->IncludeDirectoriesEntries.empty()) {
          return nullptr;
        }
  
        static std::string output;
        output = cmJoin(impl->IncludeDirectoriesEntries, ";");
        return output.c_str();
      }
      if (prop == propCOMPILE_FEATURES) {
        if (impl->CompileFeaturesEntries.empty()) {
          return nullptr;
        }
  
        static std::string output;
        output = cmJoin(impl->CompileFeaturesEntries, ";");
        return output.c_str();
      }
      if (prop == propCOMPILE_OPTIONS) {
        if (impl->CompileOptionsEntries.empty()) {
          return nullptr;
        }
  
        static std::string output;
        output = cmJoin(impl->CompileOptionsEntries, ";");
        return output.c_str();
      }
      if (prop == propCOMPILE_DEFINITIONS) {
        if (impl->CompileDefinitionsEntries.empty()) {
          return nullptr;
        }
  
        static std::string output;
        output = cmJoin(impl->CompileDefinitionsEntries, ";");
        return output.c_str();
      }
      if (prop == propLINK_OPTIONS) {
        if (impl->LinkOptionsEntries.empty()) {
          return nullptr;
        }
  
        static std::string output;
        output = cmJoin(impl->LinkOptionsEntries, ";");
        return output.c_str();
      }
      if (prop == propLINK_DIRECTORIES) {
        if (impl->LinkDirectoriesEntries.empty()) {
          return nullptr;
        }
  
        static std::string output;
        output = cmJoin(impl->LinkDirectoriesEntries, ";");
  
        return output.c_str();
      }
      if (prop == propMANUALLY_ADDED_DEPENDENCIES) {
        if (impl->Utilities.empty()) {
          return nullptr;
        }
  
        static std::string output;
        output = cmJoin(impl->Utilities, ";");
        return output.c_str();
      }
      if (prop == propPRECOMPILE_HEADERS) {
        if (impl->PrecompileHeadersEntries.empty()) {
          return nullptr;
        }
  
        static std::string output;
        output = cmJoin(impl->PrecompileHeadersEntries, ";");
        return output.c_str();
      }
      if (prop == propIMPORTED) {
        return this->IsImported() ? "TRUE" : "FALSE";
      }
      if (prop == propIMPORTED_GLOBAL) {
        return this->IsImportedGloballyVisible() ? "TRUE" : "FALSE";
      }
      if (prop == propNAME) {
        return this->GetName().c_str();
      }
      if (prop == propBINARY_DIR) {
        return impl->Makefile->GetStateSnapshot()
          .GetDirectory()
          .GetCurrentBinary()
          .c_str();
      }
      if (prop == propSOURCE_DIR) {
        return impl->Makefile->GetStateSnapshot()
          .GetDirectory()
          .GetCurrentSource()
          .c_str();
      }
    }
  
    const char* retVal = impl->Properties.GetPropertyValue(prop);
    if (!retVal) {
      const bool chain =
        impl->Makefile->GetState()->IsPropertyChained(prop, cmProperty::TARGET);
      if (chain) {
        return impl->Makefile->GetStateSnapshot().GetDirectory().GetProperty(
          prop, chain);
      }
    }
    return retVal;
  }
  
  const char* cmTarget::GetSafeProperty(const std::string& prop) const
  {
    const char* ret = this->GetProperty(prop);
    if (!ret) {
      return "";
    }
    return ret;
  }
  
  bool cmTarget::GetPropertyAsBool(const std::string& prop) const
  {
    return cmIsOn(this->GetProperty(prop));
  }
  
  cmPropertyMap const& cmTarget::GetProperties() const
  {
    return impl->Properties;
  }
  
  bool cmTarget::IsDLLPlatform() const
  {
    return impl->IsDLLPlatform;
  }
  
  bool cmTarget::IsAIX() const
  {
    return impl->IsAIX;
  }
  
  bool cmTarget::IsImported() const
  {
    return impl->IsImportedTarget;
  }
  
  bool cmTarget::IsImportedGloballyVisible() const
  {
    return impl->ImportedGloballyVisible;
  }
  
  const char* cmTarget::GetSuffixVariableInternal(
    cmStateEnums::ArtifactType artifact) const
  {
    switch (this->GetType()) {
      case cmStateEnums::STATIC_LIBRARY:
        return "CMAKE_STATIC_LIBRARY_SUFFIX";
      case cmStateEnums::SHARED_LIBRARY:
        switch (artifact) {
          case cmStateEnums::RuntimeBinaryArtifact:
            return "CMAKE_SHARED_LIBRARY_SUFFIX";
          case cmStateEnums::ImportLibraryArtifact:
            return "CMAKE_IMPORT_LIBRARY_SUFFIX";
        }
        break;
      case cmStateEnums::MODULE_LIBRARY:
        switch (artifact) {
          case cmStateEnums::RuntimeBinaryArtifact:
            return "CMAKE_SHARED_MODULE_SUFFIX";
          case cmStateEnums::ImportLibraryArtifact:
            return "CMAKE_IMPORT_LIBRARY_SUFFIX";
        }
        break;
      case cmStateEnums::EXECUTABLE:
        switch (artifact) {
          case cmStateEnums::RuntimeBinaryArtifact:
            // Android GUI application packages store the native
            // binary as a shared library.
            return (impl->IsAndroid && this->GetPropertyAsBool("ANDROID_GUI")
                      ? "CMAKE_SHARED_LIBRARY_SUFFIX"
                      : "CMAKE_EXECUTABLE_SUFFIX");
          case cmStateEnums::ImportLibraryArtifact:
            return (impl->IsAIX ? "CMAKE_AIX_IMPORT_FILE_SUFFIX"
                                : "CMAKE_IMPORT_LIBRARY_SUFFIX");
        }
        break;
      default:
        break;
    }
    return "";
  }
  
  const char* cmTarget::GetPrefixVariableInternal(
    cmStateEnums::ArtifactType artifact) const
  {
    switch (this->GetType()) {
      case cmStateEnums::STATIC_LIBRARY:
        return "CMAKE_STATIC_LIBRARY_PREFIX";
      case cmStateEnums::SHARED_LIBRARY:
        switch (artifact) {
          case cmStateEnums::RuntimeBinaryArtifact:
            return "CMAKE_SHARED_LIBRARY_PREFIX";
          case cmStateEnums::ImportLibraryArtifact:
            return "CMAKE_IMPORT_LIBRARY_PREFIX";
        }
        break;
      case cmStateEnums::MODULE_LIBRARY:
        switch (artifact) {
          case cmStateEnums::RuntimeBinaryArtifact:
            return "CMAKE_SHARED_MODULE_PREFIX";
          case cmStateEnums::ImportLibraryArtifact:
            return "CMAKE_IMPORT_LIBRARY_PREFIX";
        }
        break;
      case cmStateEnums::EXECUTABLE:
        switch (artifact) {
          case cmStateEnums::RuntimeBinaryArtifact:
            // Android GUI application packages store the native
            // binary as a shared library.
            return (impl->IsAndroid && this->GetPropertyAsBool("ANDROID_GUI")
                      ? "CMAKE_SHARED_LIBRARY_PREFIX"
                      : "");
          case cmStateEnums::ImportLibraryArtifact:
            return (impl->IsAIX ? "CMAKE_AIX_IMPORT_FILE_PREFIX"
                                : "CMAKE_IMPORT_LIBRARY_PREFIX");
        }
        break;
      default:
        break;
    }
    return "";
  }
  
  std::string cmTarget::ImportedGetFullPath(
    const std::string& config, cmStateEnums::ArtifactType artifact) const
  {
    assert(this->IsImported());
  
    // Lookup/compute/cache the import information for this
    // configuration.
    std::string desired_config = config;
    if (config.empty()) {
      desired_config = "NOCONFIG";
    }
  
    std::string result;
  
    const char* loc = nullptr;
    const char* imp = nullptr;
    std::string suffix;
  
    if (this->GetType() != cmStateEnums::INTERFACE_LIBRARY &&
        this->GetMappedConfig(desired_config, &loc, &imp, suffix)) {
      switch (artifact) {
        case cmStateEnums::RuntimeBinaryArtifact:
          if (loc) {
            result = loc;
          } else {
            std::string impProp = cmStrCat("IMPORTED_LOCATION", suffix);
            if (const char* config_location = this->GetProperty(impProp)) {
              result = config_location;
            } else if (const char* location =
                         this->GetProperty("IMPORTED_LOCATION")) {
              result = location;
            }
          }
          break;
  
        case cmStateEnums::ImportLibraryArtifact:
          if (imp) {
            result = imp;
          } else if (this->GetType() == cmStateEnums::SHARED_LIBRARY ||
                     this->IsExecutableWithExports()) {
            std::string impProp = cmStrCat("IMPORTED_IMPLIB", suffix);
            if (const char* config_implib = this->GetProperty(impProp)) {
              result = config_implib;
            } else if (const char* implib =
                         this->GetProperty("IMPORTED_IMPLIB")) {
              result = implib;
            }
          }
          break;
      }
    }
  
    if (result.empty()) {
      result = cmStrCat(this->GetName(), "-NOTFOUND");
    }
    return result;
  }
  
  bool cmTargetInternals::CheckImportedLibName(std::string const& prop,
                                               std::string const& value) const
  {
    if (this->TargetType != cmStateEnums::INTERFACE_LIBRARY ||
        !this->IsImportedTarget) {
      this->Makefile->IssueMessage(
        MessageType::FATAL_ERROR,
        prop +
          " property may be set only on imported INTERFACE library targets.");
      return false;
    }
    if (!value.empty()) {
      if (value[0] == '-') {
        this->Makefile->IssueMessage(MessageType::FATAL_ERROR,
                                     prop + " property value\n  " + value +
                                       "\nmay not start with '-'.");
        return false;
      }
      std::string::size_type bad = value.find_first_of(":/\\;");
      if (bad != std::string::npos) {
        this->Makefile->IssueMessage(MessageType::FATAL_ERROR,
                                     prop + " property value\n  " + value +
                                       "\nmay not contain '" +
                                       value.substr(bad, 1) + "'.");
        return false;
      }
    }
    return true;
  }
  
  bool cmTarget::GetMappedConfig(std::string const& desired_config,
                                 const char** loc, const char** imp,
                                 std::string& suffix) const
  {
    std::string config_upper;
    if (!desired_config.empty()) {
      config_upper = cmSystemTools::UpperCase(desired_config);
    }
  
    std::string locPropBase;
    if (this->GetType() == cmStateEnums::INTERFACE_LIBRARY) {
      locPropBase = "IMPORTED_LIBNAME";
    } else if (this->GetType() == cmStateEnums::OBJECT_LIBRARY) {
      locPropBase = "IMPORTED_OBJECTS";
    } else {
      locPropBase = "IMPORTED_LOCATION";
    }
  
    // Track the configuration-specific property suffix.
    suffix = cmStrCat('_', config_upper);
  
    std::vector<std::string> mappedConfigs;
    {
      std::string mapProp = cmStrCat("MAP_IMPORTED_CONFIG_", config_upper);
      if (const char* mapValue = this->GetProperty(mapProp)) {
        cmExpandList(mapValue, mappedConfigs, true);
      }
    }
  
    // If we needed to find one of the mapped configurations but did not
    // On a DLL platform there may be only IMPORTED_IMPLIB for a shared
    // library or an executable with exports.
    bool allowImp = (this->IsDLLPlatform() &&
                     (this->GetType() == cmStateEnums::SHARED_LIBRARY ||
                      this->IsExecutableWithExports())) ||
      (this->IsAIX() && this->IsExecutableWithExports());
  
    // If a mapping was found, check its configurations.
    for (auto mci = mappedConfigs.begin();
         !*loc && !*imp && mci != mappedConfigs.end(); ++mci) {
      // Look for this configuration.
      if (mci->empty()) {
        // An empty string in the mapping has a special meaning:
        // look up the config-less properties.
        *loc = this->GetProperty(locPropBase);
        if (allowImp) {
          *imp = this->GetProperty("IMPORTED_IMPLIB");
        }
        // If it was found, set the suffix.
        if (*loc || *imp) {
          suffix.clear();
        }
      } else {
        std::string mcUpper = cmSystemTools::UpperCase(*mci);
        std::string locProp = cmStrCat(locPropBase, '_', mcUpper);
        *loc = this->GetProperty(locProp);
        if (allowImp) {
          std::string impProp = cmStrCat("IMPORTED_IMPLIB_", mcUpper);
          *imp = this->GetProperty(impProp);
        }
  
        // If it was found, use it for all properties below.
        if (*loc || *imp) {
          suffix = cmStrCat('_', mcUpper);
        }
      }
    }
  
    // If we needed to find one of the mapped configurations but did not
    // then the target location is not found.  The project does not want
    // any other configuration.
    if (!mappedConfigs.empty() && !*loc && !*imp) {
      // Interface libraries are always available because their
      // library name is optional so it is okay to leave *loc empty.
      return this->GetType() == cmStateEnums::INTERFACE_LIBRARY;
    }
  
    // If we have not yet found it then there are no mapped
    // configurations.  Look for an exact-match.
    if (!*loc && !*imp) {
      std::string locProp = cmStrCat(locPropBase, suffix);
      *loc = this->GetProperty(locProp);
      if (allowImp) {
        std::string impProp = cmStrCat("IMPORTED_IMPLIB", suffix);
        *imp = this->GetProperty(impProp);
      }
    }
  
    // If we have not yet found it then there are no mapped
    // configurations and no exact match.
    if (!*loc && !*imp) {
      // The suffix computed above is not useful.
      suffix.clear();
  
      // Look for a configuration-less location.  This may be set by
      // manually-written code.
      *loc = this->GetProperty(locPropBase);
      if (allowImp) {
        *imp = this->GetProperty("IMPORTED_IMPLIB");
      }
    }
  
    // If we have not yet found it then the project is willing to try
    // any available configuration.
    if (!*loc && !*imp) {
      std::vector<std::string> availableConfigs;
      if (const char* iconfigs = this->GetProperty("IMPORTED_CONFIGURATIONS")) {
        cmExpandList(iconfigs, availableConfigs);
      }
      for (auto aci = availableConfigs.begin();
           !*loc && !*imp && aci != availableConfigs.end(); ++aci) {
        suffix = cmStrCat('_', cmSystemTools::UpperCase(*aci));
        std::string locProp = cmStrCat(locPropBase, suffix);
        *loc = this->GetProperty(locProp);
        if (allowImp) {
          std::string impProp = cmStrCat("IMPORTED_IMPLIB", suffix);
          *imp = this->GetProperty(impProp);
        }
      }
    }
    // If we have not yet found it then the target location is not available.
    if (!*loc && !*imp) {
      // Interface libraries are always available because their
      // library name is optional so it is okay to leave *loc empty.
      return this->GetType() == cmStateEnums::INTERFACE_LIBRARY;
    }
  
    return true;
  }
  