Reduce allocation of temporary values on heap.

- Use `std::move` while inserting temporary results into vectors.
- Change `push_back` to `emplace_back` where appropriate.

Source/CPack/IFW/cmCPackIFWInstaller.cxx

@@ -467,7 +467,7 @@ void cmCPackIFWInstaller::GenerateInstallerFile()
         std::string name = cmSystemTools::GetFilenameName(this->Resources[i]);
         std::string path = this->Directory + "/resources/" + name;
         cmsys::SystemTools::CopyFileIfDifferent(this->Resources[i], path);
-        resources.push_back(name);
+        resources.push_back(std::move(name));
       } else {
         cmCPackIFWLogger(WARNING, "Can't copy resources from \""
                            << this->Resources[i]

Source/CPack/cmCPackArchiveGenerator.cxx

@@ -132,7 +132,7 @@ int cmCPackArchiveGenerator::PackageComponents(bool ignoreGroup)
         }
       }
       // add the generated package to package file names list
-      packageFileNames.push_back(packageFileName);
+      packageFileNames.push_back(std::move(packageFileName));
     }
     // Handle Orphan components (components not belonging to any groups)
     for (auto& comp : this->Components) {
@@ -157,7 +157,7 @@ int cmCPackArchiveGenerator::PackageComponents(bool ignoreGroup)
           addOneComponentToArchive(archive, &(comp.second));
         }
         // add the generated package to package file names list
-        packageFileNames.push_back(packageFileName);
+        packageFileNames.push_back(std::move(packageFileName));
       }
     }
   }
@@ -178,7 +178,7 @@ int cmCPackArchiveGenerator::PackageComponents(bool ignoreGroup)
         addOneComponentToArchive(archive, &(comp.second));
       }
       // add the generated package to package file names list
-      packageFileNames.push_back(packageFileName);
+      packageFileNames.push_back(std::move(packageFileName));
     }
   }
   return 1;
@@ -188,7 +188,7 @@ int cmCPackArchiveGenerator::PackageComponentsAllInOne()
 {
   // reset the package file names
   packageFileNames.clear();
-  packageFileNames.push_back(std::string(toplevel));
+  packageFileNames.emplace_back(toplevel);
   packageFileNames[0] += "/";
 
   if (this->IsSet("CPACK_ARCHIVE_FILE_NAME")) {

Source/CPack/cmCPackDebGenerator.cxx

@@ -89,7 +89,7 @@ int cmCPackDebGenerator::PackageOnePack(std::string const& initialTopLevel,
   packageFileName = this->GetOption("CPACK_TOPLEVEL_DIRECTORY");
   packageFileName += "/";
   packageFileName += this->GetOption("GEN_CPACK_OUTPUT_FILE_NAME");
-  packageFileNames.push_back(packageFileName);
+  packageFileNames.push_back(std::move(packageFileName));
   return retval;
 }
 
@@ -206,7 +206,7 @@ int cmCPackDebGenerator::PackageComponentsAllInOne(
   packageFileName = this->GetOption("CPACK_TOPLEVEL_DIRECTORY");
   packageFileName += "/";
   packageFileName += this->GetOption("GEN_CPACK_OUTPUT_FILE_NAME");
-  packageFileNames.push_back(packageFileName);
+  packageFileNames.push_back(std::move(packageFileName));
   return retval;
 }
 

Source/CPack/cmCPackGenerator.cxx

@@ -313,7 +313,7 @@ int cmCPackGenerator::InstallProjectViaInstalledDirectories(
     for (std::string const& ifr : ignoreFilesRegexString) {
       cmCPackLogger(cmCPackLog::LOG_VERBOSE,
                     "Create ignore files regex for: " << ifr << std::endl);
-      ignoreFilesRegex.push_back(ifr.c_str());
+      ignoreFilesRegex.emplace_back(ifr);
     }
   }
   const char* installDirectories =
@@ -383,8 +383,8 @@ int cmCPackGenerator::InstallProjectViaInstalledDirectories(
           std::string inFileRelative =
             cmSystemTools::RelativePath(top.c_str(), inFile.c_str());
           cmSystemTools::ReadSymlink(inFile, targetFile);
-          symlinkedFiles.push_back(
-            std::pair<std::string, std::string>(targetFile, inFileRelative));
+          symlinkedFiles.emplace_back(std::move(targetFile),
+                                      std::move(inFileRelative));
         }
         /* If it is not a symlink then do a plain copy */
         else if (!(cmSystemTools::CopyFileIfDifferent(inFile.c_str(),

Source/CPack/cmCPackNSISGenerator.cxx

@@ -115,7 +115,7 @@ int cmCPackNSISGenerator::PackageFiles()
     dstr << "  RMDir \"" << componentOutputDir << "\\" << fileN << "\""
          << std::endl;
     if (!componentName.empty()) {
-      this->Components[componentName].Directories.push_back(fileN);
+      this->Components[componentName].Directories.push_back(std::move(fileN));
     }
   }
   cmCPackLogger(cmCPackLog::LOG_DEBUG, "Uninstall Dirs: " << dstr.str()

Source/CPack/cpack.cxx

@@ -432,7 +432,7 @@ int main(int argc, char const* const* argv)
       cmDocumentationEntry e;
       e.Name = g.first;
       e.Brief = g.second;
-      v.push_back(e);
+      v.push_back(std::move(e));
     }
     doc.SetSection("Generators", v);
 

Source/CTest/cmCTestBuildAndTestHandler.cxx

@@ -51,19 +51,13 @@ int cmCTestBuildAndTestHandler::RunCMake(std::string* outstring,
   args.push_back(cmSystemTools::GetCMakeCommand());
   args.push_back(this->SourceDir);
   if (!this->BuildGenerator.empty()) {
-    std::string generator = "-G";
-    generator += this->BuildGenerator;
-    args.push_back(generator);
+    args.push_back("-G" + this->BuildGenerator);
   }
   if (!this->BuildGeneratorPlatform.empty()) {
-    std::string platform = "-A";
-    platform += this->BuildGeneratorPlatform;
-    args.push_back(platform);
+    args.push_back("-A" + this->BuildGeneratorPlatform);
   }
   if (!this->BuildGeneratorToolset.empty()) {
-    std::string toolset = "-T";
-    toolset += this->BuildGeneratorToolset;
-    args.push_back(toolset);
+    args.push_back("-T" + this->BuildGeneratorToolset);
   }
 
   const char* config = nullptr;
@@ -77,8 +71,7 @@ int cmCTestBuildAndTestHandler::RunCMake(std::string* outstring,
 #endif
 
   if (config) {
-    std::string btype = "-DCMAKE_BUILD_TYPE:STRING=" + std::string(config);
-    args.push_back(btype);
+    args.push_back("-DCMAKE_BUILD_TYPE:STRING=" + std::string(config));
   }
 
   for (std::string const& opt : this->BuildOptions) {

Source/CTest/cmCTestBuildHandler.cxx

@@ -17,6 +17,7 @@
 #include <set>
 #include <stdlib.h>
 #include <string.h>
+#include <utility>
 
 static const char* cmCTestErrorMatches[] = {
   "^[Bb]us [Ee]rror",
@@ -294,7 +295,7 @@ int cmCTestBuildHandler::ProcessHandler()
           cmCTestWarningErrorFileLine[entry].RegularExpressionString)) {
       r.FileIndex = cmCTestWarningErrorFileLine[entry].FileIndex;
       r.LineIndex = cmCTestWarningErrorFileLine[entry].LineIndex;
-      this->ErrorWarningFileLineRegex.push_back(r);
+      this->ErrorWarningFileLineRegex.push_back(std::move(r));
     } else {
       cmCTestLog(
         this->CTest, ERROR_MESSAGE, "Problem Compiling regular expression: "
@@ -894,7 +895,7 @@ int cmCTestBuildHandler::RunMakeCommand(const char* command, int* retVal,
         errorwarning.PreContext.clear();
         errorwarning.PostContext.clear();
         errorwarning.Error = false;
-        this->ErrorsAndWarnings.push_back(errorwarning);
+        this->ErrorsAndWarnings.push_back(std::move(errorwarning));
         this->TotalWarnings++;
       }
     }
@@ -917,7 +918,7 @@ int cmCTestBuildHandler::RunMakeCommand(const char* command, int* retVal,
     errorwarning.PreContext.clear();
     errorwarning.PostContext.clear();
     errorwarning.Error = true;
-    this->ErrorsAndWarnings.push_back(errorwarning);
+    this->ErrorsAndWarnings.push_back(std::move(errorwarning));
     this->TotalErrors++;
     cmCTestLog(this->CTest, ERROR_MESSAGE, "There was an error: "
                  << cmsysProcess_GetErrorString(cp) << std::endl);
@@ -1009,7 +1010,7 @@ void cmCTestBuildHandler::ProcessBuffer(const char* data, size_t length,
         this->PreContext.clear();
 
         // Store report
-        this->ErrorsAndWarnings.push_back(errorwarning);
+        this->ErrorsAndWarnings.push_back(std::move(errorwarning));
         this->LastErrorOrWarning = this->ErrorsAndWarnings.end() - 1;
         this->PostContextCount = 0;
       } else {

Source/CTest/cmCTestLaunch.cxx

@@ -564,7 +564,7 @@ void cmCTestLaunch::LoadScrapeRules(
   std::string line;
   cmsys::RegularExpression rex;
   while (cmSystemTools::GetLineFromStream(fin, line)) {
-    if (rex.compile(line.c_str())) {
+    if (rex.compile(line)) {
       regexps.push_back(rex);
     }
   }

Source/CTest/cmCTestMemCheckHandler.cxx

@@ -14,6 +14,7 @@
 #include <iostream>
 #include <sstream>
 #include <string.h>
+#include <utility>
 
 struct CatToErrorType
 {
@@ -545,12 +546,12 @@ bool cmCTestMemCheckHandler::InitializeMemoryChecking()
                        << std::endl);
           return false;
         }
-        std::string suppressions = "--suppressions=" +
-          this->CTest->GetCTestConfiguration("MemoryCheckSuppressionFile");
-        this->MemoryTesterOptions.push_back(suppressions);
+        this->MemoryTesterOptions.push_back(
+          "--suppressions=" +
+          this->CTest->GetCTestConfiguration("MemoryCheckSuppressionFile"));
       }
-      std::string outputFile = "--log-file=" + this->MemoryTesterOutputFile;
-      this->MemoryTesterDynamicOptions.push_back(outputFile);
+      this->MemoryTesterDynamicOptions.push_back("--log-file=" +
+                                                 this->MemoryTesterOutputFile);
       break;
     }
     case cmCTestMemCheckHandler::PURIFY: {
@@ -588,7 +589,7 @@ bool cmCTestMemCheckHandler::InitializeMemoryChecking()
         "/Testing/Temporary/MemoryChecker.??.DPbd";
       this->BoundsCheckerDPBDFile = dpbdFile;
       this->MemoryTesterDynamicOptions.push_back("/B");
-      this->MemoryTesterDynamicOptions.push_back(dpbdFile);
+      this->MemoryTesterDynamicOptions.push_back(std::move(dpbdFile));
       this->MemoryTesterDynamicOptions.push_back("/X");
       this->MemoryTesterDynamicOptions.push_back(this->MemoryTesterOutputFile);
       this->MemoryTesterOptions.push_back("/M");
@@ -1098,5 +1099,5 @@ void cmCTestMemCheckHandler::TestOutputFileNames(
     cmCTestLog(this->CTest, ERROR_MESSAGE, log << std::endl);
     ofile.clear();
   }
-  files.push_back(ofile);
+  files.push_back(std::move(ofile));
 }

Source/CTest/cmCTestMultiProcessHandler.cxx

@@ -570,7 +570,7 @@ void cmCTestMultiProcessHandler::CreateParallelTestCostList()
   TestSet alreadySortedTests;
 
   std::list<TestSet> priorityStack;
-  priorityStack.push_back(TestSet());
+  priorityStack.emplace_back();
   TestSet& topLevel = priorityStack.back();
 
   // In parallel test runs add previously failed tests to the front
@@ -592,7 +592,7 @@ void cmCTestMultiProcessHandler::CreateParallelTestCostList()
   // further dependencies exist.
   while (!priorityStack.back().empty()) {
     TestSet& previousSet = priorityStack.back();
-    priorityStack.push_back(TestSet());
+    priorityStack.emplace_back();
     TestSet& currentSet = priorityStack.back();
 
     for (auto const& i : previousSet) {

Source/CTest/cmCTestSVN.cxx

@@ -515,7 +515,7 @@ private:
     } else {
       local_path = path;
     }
-    this->SVN->Repositories.push_back(SVNInfo(local_path.c_str()));
+    this->SVN->Repositories.emplace_back(local_path.c_str());
   }
 };
 
@@ -526,7 +526,7 @@ bool cmCTestSVN::LoadRepositories()
   }
 
   // Info for root repository
-  this->Repositories.push_back(SVNInfo(""));
+  this->Repositories.emplace_back("");
   this->RootInfo = &(this->Repositories.back());
 
   // Run "svn status" to get the list of external repositories

Source/CTest/cmCTestTestHandler.cxx

@@ -2156,9 +2156,7 @@ bool cmCTestTestHandler::SetTestsProperties(
             std::vector<std::string> lval;
             cmSystemTools::ExpandListArgument(val, lval);
             for (std::string const& cr : lval) {
-              rt.ErrorRegularExpressions.push_back(
-                std::pair<cmsys::RegularExpression, std::string>(
-                  cmsys::RegularExpression(cr.c_str()), std::string(cr)));
+              rt.ErrorRegularExpressions.emplace_back(cr, cr);
             }
           }
           if (key == "PROCESSORS") {
@@ -2204,9 +2202,7 @@ bool cmCTestTestHandler::SetTestsProperties(
             std::vector<std::string> lval;
             cmSystemTools::ExpandListArgument(val, lval);
             for (std::string const& cr : lval) {
-              rt.RequiredRegularExpressions.push_back(
-                std::pair<cmsys::RegularExpression, std::string>(
-                  cmsys::RegularExpression(cr.c_str()), std::string(cr)));
+              rt.RequiredRegularExpressions.emplace_back(cr, cr);
             }
           }
           if (key == "WORKING_DIRECTORY") {
@@ -2225,9 +2221,7 @@ bool cmCTestTestHandler::SetTestsProperties(
               std::vector<std::string> lval;
               cmSystemTools::ExpandListArgument(propArgs[1], lval);
               for (std::string const& cr : lval) {
-                rt.TimeoutRegularExpressions.push_back(
-                  std::pair<cmsys::RegularExpression, std::string>(
-                    cmsys::RegularExpression(cr.c_str()), std::string(cr)));
+                rt.TimeoutRegularExpressions.emplace_back(cr, cr);
               }
             }
           }

Source/cmAddCustomCommandCommand.cxx

@@ -3,6 +3,7 @@
 #include "cmAddCustomCommandCommand.h"
 
 #include <sstream>
+#include <utility>
 
 #include "cmCustomCommand.h"
 #include "cmCustomCommandLines.h"
@@ -184,9 +185,7 @@ bool cmAddCustomCommandCommand::InitialPass(
           depends.push_back(dep);
 
           // Add the implicit dependency language and file.
-          cmCustomCommand::ImplicitDependsPair entry(implicit_depends_lang,
-                                                     dep);
-          implicit_depends.push_back(entry);
+          implicit_depends.emplace_back(implicit_depends_lang, dep);
 
           // Switch back to looking for a language.
           doing = doing_implicit_depends_lang;
@@ -200,7 +199,7 @@ bool cmAddCustomCommandCommand::InitialPass(
         case doing_depends: {
           std::string dep = copy;
           cmSystemTools::ConvertToUnixSlashes(dep);
-          depends.push_back(dep);
+          depends.push_back(std::move(dep));
         } break;
         case doing_outputs:
           outputs.push_back(filename);

Source/cmAddCustomTargetCommand.cxx

@@ -3,6 +3,7 @@
 #include "cmAddCustomTargetCommand.h"
 
 #include <sstream>
+#include <utility>
 
 #include "cmCustomCommandLines.h"
 #include "cmGeneratorExpression.h"
@@ -127,7 +128,7 @@ bool cmAddCustomTargetCommand::InitialPass(
         case doing_depends: {
           std::string dep = copy;
           cmSystemTools::ConvertToUnixSlashes(dep);
-          depends.push_back(dep);
+          depends.push_back(std::move(dep));
         } break;
         case doing_comment:
           comment_buffer = copy;

Source/cmAuxSourceDirectoryCommand.cxx

@@ -63,7 +63,7 @@ bool cmAuxSourceDirectoryCommand::InitialPass(
           // depends can be done
           cmSourceFile* sf = this->Makefile->GetOrCreateSource(fullname);
           sf->SetProperty("ABSTRACT", "0");
-          files.push_back(fullname);
+          files.push_back(std::move(fullname));
         }
       }
     }

Source/cmCommonTargetGenerator.cxx

@@ -159,7 +159,7 @@ std::vector<std::string> cmCommonTargetGenerator::GetLinkedTargetDirectories()
         std::string di = lg->GetCurrentBinaryDirectory();
         di += "/";
         di += lg->GetTargetDirectory(linkee);
-        dirs.push_back(di);
+        dirs.push_back(std::move(di));
       }
     }
   }

Source/cmComputeComponentGraph.cxx

@@ -88,7 +88,7 @@ void cmComputeComponentGraph::TarjanVisit(int i)
   if (this->TarjanEntries[i].Root == i) {
     // Yes.  Create it.
     int c = static_cast<int>(this->Components.size());
-    this->Components.push_back(NodeList());
+    this->Components.emplace_back();
     NodeList& component = this->Components[c];
 
     // Populate the component list.
@@ -125,8 +125,8 @@ void cmComputeComponentGraph::TransferEdges()
       if (i_component != j_component) {
         // We do not attempt to combine duplicate edges, but instead
         // store the inter-component edges with suitable multiplicity.
-        this->ComponentGraph[i_component].push_back(
-          cmGraphEdge(j_component, ni.IsStrong()));
+        this->ComponentGraph[i_component].emplace_back(j_component,
+                                                       ni.IsStrong());
       }
     }
   }

Source/cmComputeLinkDepends.cxx

@@ -285,9 +285,9 @@ std::map<std::string, int>::iterator cmComputeLinkDepends::AllocateLinkEntry(
     item, static_cast<int>(this->EntryList.size()));
   std::map<std::string, int>::iterator lei =
     this->LinkEntryIndex.insert(index_entry).first;
-  this->EntryList.push_back(LinkEntry());
+  this->EntryList.emplace_back();
   this->InferredDependSets.push_back(nullptr);
-  this->EntryConstraintGraph.push_back(EdgeList());
+  this->EntryConstraintGraph.emplace_back();
   return lei;
 }
 
@@ -472,8 +472,7 @@ void cmComputeLinkDepends::AddVarLinkEntries(int depender_index,
 
       // If the library is meant for this link type then use it.
       if (llt == GENERAL_LibraryType || llt == this->LinkType) {
-        cmLinkItem item(d, this->FindTargetToLink(depender_index, d));
-        actual_libs.push_back(item);
+        actual_libs.emplace_back(d, this->FindTargetToLink(depender_index, d));
       } else if (this->OldLinkDirMode) {
         cmLinkItem item(d, this->FindTargetToLink(depender_index, d));
         this->CheckWrongConfigItem(item);

Source/cmComputeLinkInformation.cxx

@@ -498,8 +498,8 @@ bool cmComputeLinkInformation::Compute()
       cmStateEnums::ArtifactType artifact = implib
         ? cmStateEnums::ImportLibraryArtifact
         : cmStateEnums::RuntimeBinaryArtifact;
-      std::string lib = tgt->GetFullPath(this->Config, artifact, true);
-      this->OldLinkDirItems.push_back(lib);
+      this->OldLinkDirItems.push_back(
+        tgt->GetFullPath(this->Config, artifact, true));
     }
   }
 
@@ -598,13 +598,13 @@ void cmComputeLinkInformation::AddItem(std::string const& item,
 
       std::string exe = tgt->GetFullPath(config, artifact, true);
       linkItem += exe;
-      this->Items.push_back(Item(linkItem, true, tgt));
-      this->Depends.push_back(exe);
+      this->Items.emplace_back(linkItem, true, tgt);
+      this->Depends.push_back(std::move(exe));
     } else if (tgt->GetType() == cmStateEnums::INTERFACE_LIBRARY) {
       // Add the interface library as an item so it can be considered as part
       // of COMPATIBLE_INTERFACE_ enforcement.  The generators will ignore
       // this for the actual link line.
-      this->Items.push_back(Item(std::string(), false, tgt));
+      this->Items.emplace_back(std::string(), false, tgt);
 
       // Also add the item the interface specifies to be used in its place.
       std::string const& libName = tgt->GetImportedLibName(config);
@@ -950,10 +950,10 @@ void cmComputeLinkInformation::SetCurrentLinkType(LinkType lt)
     if (this->LinkTypeEnabled) {
       switch (this->CurrentLinkType) {
         case LinkStatic:
-          this->Items.push_back(Item(this->StaticLinkTypeFlag, false));
+          this->Items.emplace_back(this->StaticLinkTypeFlag, false);
           break;
         case LinkShared:
-          this->Items.push_back(Item(this->SharedLinkTypeFlag, false));
+          this->Items.emplace_back(this->SharedLinkTypeFlag, false);
           break;
         default:
           break;
@@ -989,7 +989,7 @@ void cmComputeLinkInformation::AddTargetItem(std::string const& item,
 
   // If this platform wants a flag before the full path, add it.
   if (!this->LibLinkFileFlag.empty()) {
-    this->Items.push_back(Item(this->LibLinkFileFlag, false));
+    this->Items.emplace_back(this->LibLinkFileFlag, false);
   }
 
   // For compatibility with CMake 2.4 include the item's directory in
@@ -1001,7 +1001,7 @@ void cmComputeLinkInformation::AddTargetItem(std::string const& item,
   }
 
   // Now add the full path to the library.
-  this->Items.push_back(Item(item, true, target));
+  this->Items.emplace_back(item, true, target);
 }
 
 void cmComputeLinkInformation::AddFullItem(std::string const& item)
@@ -1056,11 +1056,11 @@ void cmComputeLinkInformation::AddFullItem(std::string const& item)
 
   // If this platform wants a flag before the full path, add it.
   if (!this->LibLinkFileFlag.empty()) {
-    this->Items.push_back(Item(this->LibLinkFileFlag, false));
+    this->Items.emplace_back(this->LibLinkFileFlag, false);
   }
 
   // Now add the full path to the library.
-  this->Items.push_back(Item(item, true));
+  this->Items.emplace_back(item, true);
 }
 
 bool cmComputeLinkInformation::CheckImplicitDirItem(std::string const& item)
@@ -1147,7 +1147,7 @@ void cmComputeLinkInformation::AddUserItem(std::string const& item,
     this->SetCurrentLinkType(this->StartLinkType);
 
     // Use the item verbatim.
-    this->Items.push_back(Item(item, false));
+    this->Items.emplace_back(item, false);
     return;
   }
 
@@ -1219,7 +1219,7 @@ void cmComputeLinkInformation::AddUserItem(std::string const& item,
   std::string out = this->LibLinkFlag;
   out += lib;
   out += this->LibLinkSuffix;
-  this->Items.push_back(Item(out, false));
+  this->Items.emplace_back(out, false);
 
   // Here we could try to find the library the linker will find and
   // add a runtime information entry for it.  It would probably not be
@@ -1254,10 +1254,10 @@ void cmComputeLinkInformation::AddFrameworkItem(std::string const& item)
   this->AddLibraryRuntimeInfo(full_fw);
 
   // Add the item using the -framework option.
-  this->Items.push_back(Item("-framework", false));
+  this->Items.emplace_back("-framework", false);
   cmOutputConverter converter(this->Makefile->GetStateSnapshot());
   fw = converter.EscapeForShell(fw);
-  this->Items.push_back(Item(fw, false));
+  this->Items.emplace_back(fw, false);
 }
 
 void cmComputeLinkInformation::AddDirectoryItem(std::string const& item)
@@ -1742,7 +1742,7 @@ void cmComputeLinkInformation::GetRPath(std::vector<std::string>& runtimeDirs,
           cmSystemTools::ConvertToUnixSlashes(d);
         }
         if (emitted.insert(d).second) {
-          runtimeDirs.push_back(d);
+          runtimeDirs.push_back(std::move(d));
         }
       } else if (use_link_rpath) {
         // Do not add any path inside the source or build tree.
@@ -1764,7 +1764,7 @@ void cmComputeLinkInformation::GetRPath(std::vector<std::string>& runtimeDirs,
             cmSystemTools::ConvertToUnixSlashes(d);
           }
           if (emitted.insert(d).second) {
-            runtimeDirs.push_back(d);
+            runtimeDirs.push_back(std::move(d));
           }
         }
       }

Source/cmComputeTargetDepends.cxx

@@ -200,7 +200,7 @@ void cmComputeTargetDepends::CollectTargetDepends(int depender_index)
     std::vector<std::string> configs;
     depender->Makefile->GetConfigurations(configs);
     if (configs.empty()) {
-      configs.push_back("");
+      configs.emplace_back();
     }
     for (std::string const& it : configs) {
       std::vector<cmSourceFile const*> objectFiles;
@@ -369,8 +369,7 @@ void cmComputeTargetDepends::AddTargetDepend(int depender_index,
     int dependee_index = tii->second;
 
     // Add this entry to the dependency graph.
-    this->InitialGraph[depender_index].push_back(
-      cmGraphEdge(dependee_index, !linking));
+    this->InitialGraph[depender_index].emplace_back(dependee_index, !linking);
   }
 }
 
@@ -504,7 +503,7 @@ bool cmComputeTargetDepends::IntraComponent(std::vector<int> const& cmap,
     for (cmGraphEdge const& edge : el) {
       int j = edge;
       if (cmap[j] == c && edge.IsStrong()) {
-        this->FinalGraph[i].push_back(cmGraphEdge(j, true));
+        this->FinalGraph[i].emplace_back(j, true);
         if (!this->IntraComponent(cmap, c, j, head, emitted, visited)) {
           return false;
         }
@@ -513,7 +512,7 @@ bool cmComputeTargetDepends::IntraComponent(std::vector<int> const& cmap,
 
     // Prepend to a linear linked-list of intra-component edges.
     if (*head >= 0) {
-      this->FinalGraph[i].push_back(cmGraphEdge(*head, false));
+      this->FinalGraph[i].emplace_back(*head, false);
     } else {
       this->ComponentTail[c] = i;
     }
@@ -563,8 +562,8 @@ bool cmComputeTargetDepends::ComputeFinalDepends(
     for (cmGraphEdge const& ni : nl) {
       int dependee_component = ni;
       int dependee_component_head = this->ComponentHead[dependee_component];
-      this->FinalGraph[depender_component_tail].push_back(
-        cmGraphEdge(dependee_component_head, ni.IsStrong()));
+      this->FinalGraph[depender_component_tail].emplace_back(
+        dependee_component_head, ni.IsStrong());
     }
   }
   return true;

Source/cmCoreTryCompile.cxx

@@ -631,13 +631,13 @@ int cmCoreTryCompile::TryCompileCode(std::vector<std::string> const& argv,
             kCMAKE_TRY_COMPILE_OSX_ARCHITECTURES)) {
         vars.erase(kCMAKE_OSX_ARCHITECTURES);
         std::string flag = "-DCMAKE_OSX_ARCHITECTURES=" + std::string(tcArchs);
-        cmakeFlags.push_back(flag);
+        cmakeFlags.push_back(std::move(flag));
       }
 
       for (std::string const& var : vars) {
         if (const char* val = this->Makefile->GetDefinition(var)) {
           std::string flag = "-D" + var + "=" + val;
-          cmakeFlags.push_back(flag);
+          cmakeFlags.push_back(std::move(flag));
         }
       }
     }
@@ -938,7 +938,7 @@ void cmCoreTryCompile::FindOutputFile(const std::string& targetName,
   // a list of directories where to search for the compilation result
   // at first directly in the binary dir
   std::vector<std::string> searchDirs;
-  searchDirs.push_back("");
+  searchDirs.emplace_back();
 
   const char* config =
     this->Makefile->GetDefinition("CMAKE_TRY_COMPILE_CONFIGURATION");
@@ -946,12 +946,12 @@ void cmCoreTryCompile::FindOutputFile(const std::string& targetName,
   if (config && config[0]) {
     std::string tmp = "/";
     tmp += config;
-    searchDirs.push_back(tmp);
+    searchDirs.push_back(std::move(tmp));
   }
   searchDirs.push_back("/Debug");
 #if defined(__APPLE__)
   std::string app = "/Debug/" + targetName + ".app";
-  searchDirs.push_back(app);
+  searchDirs.push_back(std::move(app));
 #endif
   searchDirs.push_back("/Development");
 

Source/cmCustomCommandGenerator.cxx

@@ -14,6 +14,7 @@
 
 #include <memory> // IWYU pragma: keep
 #include <stddef.h>
+#include <utility>
 
 cmCustomCommandGenerator::cmCustomCommandGenerator(cmCustomCommand const& cc,
                                                    const std::string& config,
@@ -37,10 +38,10 @@ cmCustomCommandGenerator::cmCustomCommandGenerator(cmCustomCommand const& cc,
         cmSystemTools::ExpandListArgument(parsed_arg, ExpandedArg);
         argv.insert(argv.end(), ExpandedArg.begin(), ExpandedArg.end());
       } else {
-        argv.push_back(parsed_arg);
+        argv.push_back(std::move(parsed_arg));
       }
     }
-    this->CommandLines.push_back(argv);
+    this->CommandLines.push_back(std::move(argv));
   }
 
   std::vector<std::string> depends = this->CC.GetDepends();

Source/cmDependsC.cxx

@@ -303,7 +303,7 @@ void cmDependsC::ReadCacheFile()
         if (line != "-") {
           entry.QuotedLocation = line;
         }
-        cacheEntry->UnscannedEntries.push_back(entry);
+        cacheEntry->UnscannedEntries.push_back(std::move(entry));
       }
     }
   }

Source/cmDependsJavaParserHelper.cxx

@@ -10,6 +10,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <utility>
 
 int cmDependsJava_yyparse(yyscan_t yyscanner);
 
@@ -22,7 +23,7 @@ cmDependsJavaParserHelper::cmDependsJavaParserHelper()
 
   CurrentClass tl;
   tl.Name = "*";
-  this->ClassStack.push_back(tl);
+  this->ClassStack.push_back(std::move(tl));
 }
 
 cmDependsJavaParserHelper::~cmDependsJavaParserHelper()
@@ -175,7 +176,7 @@ void cmDependsJavaParserHelper::StartClass(const char* cls)
 {
   CurrentClass cl;
   cl.Name = cls;
-  this->ClassStack.push_back(cl);
+  this->ClassStack.push_back(std::move(cl));
 
   this->CurrentDepth++;
 }

Source/cmDocumentation.cxx

@@ -213,7 +213,7 @@ bool cmDocumentation::CheckOptions(int argc, const char* const* argv,
   if (argc == 1) {
     RequestedHelpItem help;
     help.HelpType = cmDocumentation::Usage;
-    this->RequestedHelpItems.push_back(help);
+    this->RequestedHelpItems.push_back(std::move(help));
     return true;
   }
 
@@ -352,7 +352,7 @@ bool cmDocumentation::CheckOptions(int argc, const char* const* argv,
     if (help.HelpType != None) {
       // This is a help option.  See if there is a file name given.
       result = true;
-      this->RequestedHelpItems.push_back(help);
+      this->RequestedHelpItems.push_back(std::move(help));
     }
   }
   return result;

Source/cmDocumentationSection.cxx

@@ -6,7 +6,7 @@ void cmDocumentationSection::Append(const char* data[][2])
 {
   int i = 0;
   while (data[i][1]) {
-    this->Entries.push_back(cmDocumentationEntry(data[i][0], data[i][1]));
+    this->Entries.emplace_back(data[i][0], data[i][1]);
     data += 1;
   }
 }
@@ -16,7 +16,7 @@ void cmDocumentationSection::Prepend(const char* data[][2])
   std::vector<cmDocumentationEntry> tmp;
   int i = 0;
   while (data[i][1]) {
-    tmp.push_back(cmDocumentationEntry(data[i][0], data[i][1]));
+    tmp.emplace_back(data[i][0], data[i][1]);
     data += 1;
   }
   this->Entries.insert(this->Entries.begin(), tmp.begin(), tmp.end());
@@ -24,5 +24,5 @@ void cmDocumentationSection::Prepend(const char* data[][2])
 
 void cmDocumentationSection::Append(const char* n, const char* b)
 {
-  this->Entries.push_back(cmDocumentationEntry(n, b));
+  this->Entries.emplace_back(n, b);
 }

Source/cmELF.cxx

@@ -547,8 +547,7 @@ cmELF::DynamicEntryList cmELFInternalImpl<Types>::GetDynamicEntries()
   // Copy into public array
   result.reserve(this->DynamicSectionEntries.size());
   for (ELF_Dyn& dyn : this->DynamicSectionEntries) {
-    result.push_back(
-      std::pair<unsigned long, unsigned long>(dyn.d_tag, dyn.d_un.d_val));
+    result.emplace_back(dyn.d_tag, dyn.d_un.d_val);
   }
 
   return result;

Source/cmExportBuildFileGenerator.cxx

@@ -228,7 +228,7 @@ void cmExportBuildFileGenerator::HandleMissingTarget(
 
       missingTarget += dependee->GetExportName();
       link_libs += missingTarget;
-      missingTargets.push_back(missingTarget);
+      missingTargets.push_back(std::move(missingTarget));
       return;
     }
     // We are not appending, so all exported targets should be

Source/cmExportCommand.cxx

@@ -205,7 +205,7 @@ bool cmExportCommand::InitialPass(std::vector<std::string> const& args,
   std::vector<std::string> configurationTypes;
   this->Makefile->GetConfigurations(configurationTypes);
   if (configurationTypes.empty()) {
-    configurationTypes.push_back("");
+    configurationTypes.emplace_back();
   }
   for (std::string const& ct : configurationTypes) {
     ebfg->AddConfiguration(ct);

Source/cmExportInstallFileGenerator.cxx

@@ -439,7 +439,7 @@ void cmExportInstallFileGenerator::HandleMissingTarget(
 
     missingTarget += dependee->GetExportName();
     link_libs += missingTarget;
-    missingTargets.push_back(missingTarget);
+    missingTargets.push_back(std::move(missingTarget));
   } else {
     // All exported targets should be known here and should be unique.
     // This is probably user-error.

Source/cmExtraEclipseCDT4Generator.cxx

@@ -413,7 +413,7 @@ void cmExtraEclipseCDT4Generator::CreateProjectFile()
       this->AppendLinkedResource(xml, sourceLinkedResourceName,
                                  this->GetEclipsePath(linkSourceDirectory),
                                  LinkToFolder);
-      this->SrcLinkedResources.push_back(sourceLinkedResourceName);
+      this->SrcLinkedResources.push_back(std::move(sourceLinkedResourceName));
     }
   }
 

Source/cmFileCommand.cxx

@@ -1320,7 +1320,7 @@ bool cmFileCopier::CheckValue(std::string const& arg)
       std::string regex = "/";
       regex += cmsys::Glob::PatternToRegex(arg, false);
       regex += "$";
-      this->MatchRules.push_back(MatchRule(regex));
+      this->MatchRules.emplace_back(regex);
       this->CurrentMatchRule = &*(this->MatchRules.end() - 1);
       if (this->CurrentMatchRule->Regex.is_valid()) {
         this->Doing = DoingNone;
@@ -1332,7 +1332,7 @@ bool cmFileCopier::CheckValue(std::string const& arg)
       }
     } break;
     case DoingRegex:
-      this->MatchRules.push_back(MatchRule(arg));
+      this->MatchRules.emplace_back(arg);
       this->CurrentMatchRule = &*(this->MatchRules.end() - 1);
       if (this->CurrentMatchRule->Regex.is_valid()) {
         this->Doing = DoingNone;

Source/cmFindCommon.cxx

@@ -314,7 +314,7 @@ void cmFindCommon::AddPathSuffix(std::string const& arg)
   }
 
   // Store the suffix.
-  this->SearchPathSuffixes.push_back(suffix);
+  this->SearchPathSuffixes.push_back(std::move(suffix));
 }
 
 void AddTrailingSlash(std::string& s)

Source/cmFindLibraryCommand.cxx

@@ -150,7 +150,7 @@ void cmFindLibraryCommand::AddArchitecturePath(
 
     if (use_dirX) {
       dirX += "/";
-      this->SearchPaths.push_back(dirX);
+      this->SearchPaths.push_back(std::move(dirX));
     }
 
     if (use_dir) {
@@ -323,7 +323,7 @@ void cmFindLibraryHelper::AddName(std::string const& name)
   }
   regex += "$";
   entry.Regex.compile(regex.c_str());
-  this->Names.push_back(entry);
+  this->Names.push_back(std::move(entry));
 }
 
 void cmFindLibraryHelper::SetName(std::string const& name)

Source/cmFindPackageCommand.cxx

@@ -225,7 +225,7 @@ bool cmFindPackageCommand::InitialPass(std::vector<std::string> const& args,
   std::set<std::string> optionalComponents;
 
   // Always search directly in a generated path.
-  this->SearchPathSuffixes.push_back("");
+  this->SearchPathSuffixes.emplace_back();
 
   // Parse the arguments.
   enum Doing
@@ -523,7 +523,7 @@ bool cmFindPackageCommand::InitialPass(std::vector<std::string> const& args,
 
       config = cmSystemTools::LowerCase(n);
       config += "-config.cmake";
-      this->Configs.push_back(config);
+      this->Configs.push_back(std::move(config));
     }
   }
 
@@ -1484,7 +1484,7 @@ bool cmFindPackageCommand::CheckVersion(std::string const& config_file)
   ConfigFileInfo configFileInfo;
   configFileInfo.filename = config_file;
   configFileInfo.version = version;
-  this->ConsideredConfigs.push_back(configFileInfo);
+  this->ConsideredConfigs.push_back(std::move(configFileInfo));
 
   return result;
 }

Source/cmFindProgramCommand.cxx

@@ -22,7 +22,7 @@ struct cmFindProgramHelper
     this->Extensions.push_back(".exe");
 #endif
     // Consider original name with no extensions.
-    this->Extensions.push_back("");
+    this->Extensions.emplace_back();
   }
 
   // List of valid extensions.

Source/cmGeneratorExpressionEvaluationFile.cxx

@@ -155,7 +155,7 @@ void cmGeneratorExpressionEvaluationFile::Generate(cmLocalGenerator* lg)
   lg->GetMakefile()->GetConfigurations(allConfigs);
 
   if (allConfigs.empty()) {
-    allConfigs.push_back("");
+    allConfigs.emplace_back();
   }
 
   std::vector<std::string> enabledLanguages;

Source/cmGeneratorExpressionEvaluator.cxx

@@ -132,9 +132,8 @@ std::string GeneratorExpressionContent::EvaluateParameters(
     int counter = 1;
     for (; pit != pend; ++pit, ++counter) {
       if (acceptsArbitraryContent && counter == numExpected) {
-        std::string lastParam = this->ProcessArbitraryContent(
-          node, identifier, context, dagChecker, pit);
-        parameters.push_back(lastParam);
+        parameters.push_back(this->ProcessArbitraryContent(
+          node, identifier, context, dagChecker, pit));
         return std::string();
       }
       std::string parameter;
@@ -148,7 +147,7 @@ std::string GeneratorExpressionContent::EvaluateParameters(
           return std::string();
         }
       }
-      parameters.push_back(parameter);
+      parameters.push_back(std::move(parameter));
     }
   }
 

Source/cmGeneratorExpressionLexer.cxx

@@ -12,8 +12,7 @@ static void InsertText(const char* upto, const char* c,
                        std::vector<cmGeneratorExpressionToken>& result)
 {
   if (upto != c) {
-    result.push_back(cmGeneratorExpressionToken(
-      cmGeneratorExpressionToken::Text, upto, c - upto));
+    result.emplace_back(cmGeneratorExpressionToken::Text, upto, c - upto);
   }
 }
 
@@ -30,8 +29,8 @@ std::vector<cmGeneratorExpressionToken> cmGeneratorExpressionLexer::Tokenize(
       case '$':
         if (c[1] == '<') {
           InsertText(upto, c, result);
-          result.push_back(cmGeneratorExpressionToken(
-            cmGeneratorExpressionToken::BeginExpression, c, 2));
+          result.emplace_back(cmGeneratorExpressionToken::BeginExpression, c,
+                              2);
           upto = c + 2;
           ++c;
           SawBeginExpression = true;
@@ -39,21 +38,18 @@ std::vector<cmGeneratorExpressionToken> cmGeneratorExpressionLexer::Tokenize(
         break;
       case '>':
         InsertText(upto, c, result);
-        result.push_back(cmGeneratorExpressionToken(
-          cmGeneratorExpressionToken::EndExpression, c, 1));
+        result.emplace_back(cmGeneratorExpressionToken::EndExpression, c, 1);
         upto = c + 1;
         SawGeneratorExpression = SawBeginExpression;
         break;
       case ':':
         InsertText(upto, c, result);
-        result.push_back(cmGeneratorExpressionToken(
-          cmGeneratorExpressionToken::ColonSeparator, c, 1));
+        result.emplace_back(cmGeneratorExpressionToken::ColonSeparator, c, 1);
         upto = c + 1;
         break;
       case ',':
         InsertText(upto, c, result);
-        result.push_back(cmGeneratorExpressionToken(
-          cmGeneratorExpressionToken::CommaSeparator, c, 1));
+        result.emplace_back(cmGeneratorExpressionToken::CommaSeparator, c, 1);
         upto = c + 1;
         break;
       default:

Source/cmGeneratorTarget.cxx

@@ -445,7 +445,7 @@ void cmGeneratorTarget::ComputeObjectMapping()
   std::vector<std::string> configs;
   this->Makefile->GetConfigurations(configs);
   if (configs.empty()) {
-    configs.push_back("");
+    configs.emplace_back();
   }
   for (std::string const& c : configs) {
     std::vector<cmSourceFile const*> sourceFiles;
@@ -1101,8 +1101,7 @@ void cmGeneratorTarget::ComputeKindedSources(KindedSources& files,
     }
 
     // Save this classified source file in the result vector.
-    SourceAndKind entry = { sf, kind };
-    files.Sources.push_back(entry);
+    files.Sources.push_back({ sf, kind });
   }
 
   if (!badObjLib.empty()) {
@@ -1143,7 +1142,7 @@ void cmGeneratorTarget::ComputeAllConfigSources() const
         AllConfigSource acs;
         acs.Source = src.Source;
         acs.Kind = src.Kind;
-        this->AllConfigSources.push_back(acs);
+        this->AllConfigSources.push_back(std::move(acs));
         std::map<cmSourceFile const*, size_t>::value_type entry(
           src.Source, this->AllConfigSources.size() - 1);
         mi = index.insert(entry).first;
@@ -2113,7 +2112,7 @@ cmTargetTraceDependencies::cmTargetTraceDependencies(cmGeneratorTarget* target)
     std::vector<std::string> configs;
     this->Makefile->GetConfigurations(configs);
     if (configs.empty()) {
-      configs.push_back("");
+      configs.emplace_back();
     }
     std::set<cmSourceFile*> emitted;
     for (std::string const& c : configs) {
@@ -2306,7 +2305,7 @@ void cmTargetTraceDependencies::CheckCustomCommand(cmCustomCommand const& cc)
   std::set<std::string> emitted;
   this->Makefile->GetConfigurations(configs);
   if (configs.empty()) {
-    configs.push_back("");
+    configs.emplace_back();
   }
   for (std::string const& conf : configs) {
     this->FollowCommandDepends(cc, conf, emitted);
@@ -4201,7 +4200,7 @@ void cmGeneratorTarget::LookupLinkItems(std::vector<std::string> const& names,
     if (name == this->GetName() || name.empty()) {
       continue;
     }
-    items.push_back(cmLinkItem(name, this->FindTargetToLink(name)));
+    items.emplace_back(name, this->FindTargetToLink(name));
   }
 }
 
@@ -4988,7 +4987,7 @@ bool cmGeneratorTarget::GetConfigCommonSourceFiles(
   std::vector<std::string> configs;
   this->Makefile->GetConfigurations(configs);
   if (configs.empty()) {
-    configs.push_back("");
+    configs.emplace_back();
   }
 
   std::vector<std::string>::const_iterator it = configs.begin();
@@ -5276,8 +5275,8 @@ void cmGeneratorTarget::ComputeLinkImplementationLibraries(
       }
 
       // The entry is meant for this configuration.
-      impl.Libraries.push_back(cmLinkImplItem(
-        name, this->FindTargetToLink(name), *btIt, evaluated != *le));
+      impl.Libraries.emplace_back(name, this->FindTargetToLink(name), *btIt,
+                                  evaluated != *le);
     }
 
     std::set<std::string> const& seenProps = cge->GetSeenTargetProperties();
@@ -5304,8 +5303,8 @@ void cmGeneratorTarget::ComputeLinkImplementationLibraries(
         continue;
       }
       // Support OLD behavior for CMP0003.
-      impl.WrongConfigLibraries.push_back(
-        cmLinkItem(name, this->FindTargetToLink(name)));
+      impl.WrongConfigLibraries.emplace_back(name,
+                                             this->FindTargetToLink(name));
     }
   }
 }

Source/cmGlobalGenerator.cxx

@@ -2293,9 +2293,8 @@ void cmGlobalGenerator::AddGlobalTarget_Package(
     singleLine.push_back(cmakeCfgIntDir);
   }
   singleLine.push_back("--config");
-  std::string relConfigFile = "./CPackConfig.cmake";
-  singleLine.push_back(relConfigFile);
-  gti.CommandLines.push_back(singleLine);
+  singleLine.push_back("./CPackConfig.cmake");
+  gti.CommandLines.push_back(std::move(singleLine));
   if (this->GetPreinstallTargetName()) {
     gti.Depends.push_back(this->GetPreinstallTargetName());
   } else {
@@ -2305,7 +2304,7 @@ void cmGlobalGenerator::AddGlobalTarget_Package(
       gti.Depends.push_back(this->GetAllTargetName());
     }
   }
-  targets.push_back(gti);
+  targets.push_back(std::move(gti));
 }
 
 void cmGlobalGenerator::AddGlobalTarget_PackageSource(
@@ -2339,11 +2338,10 @@ void cmGlobalGenerator::AddGlobalTarget_PackageSource(
   cmCustomCommandLine singleLine;
   singleLine.push_back(cmSystemTools::GetCPackCommand());
   singleLine.push_back("--config");
-  std::string relConfigFile = "./CPackSourceConfig.cmake";
-  singleLine.push_back(relConfigFile);
-  singleLine.push_back(configFile);
-  gti.CommandLines.push_back(singleLine);
-  targets.push_back(gti);
+  singleLine.push_back("./CPackSourceConfig.cmake");
+  singleLine.push_back(std::move(configFile));
+  gti.CommandLines.push_back(std::move(singleLine));
+  targets.push_back(std::move(gti));
 }
 
 void cmGlobalGenerator::AddGlobalTarget_Test(
@@ -2378,58 +2376,59 @@ void cmGlobalGenerator::AddGlobalTarget_Test(
   {
     singleLine.push_back("$(ARGS)");
   }
-  gti.CommandLines.push_back(singleLine);
-  targets.push_back(gti);
+  gti.CommandLines.push_back(std::move(singleLine));
+  targets.push_back(std::move(gti));
 }
 
 void cmGlobalGenerator::AddGlobalTarget_EditCache(
   std::vector<GlobalTargetInfo>& targets)
 {
   const char* editCacheTargetName = this->GetEditCacheTargetName();
-  if (editCacheTargetName) {
-    GlobalTargetInfo gti;
-    gti.Name = editCacheTargetName;
-    cmCustomCommandLine singleLine;
-
-    // Use generator preference for the edit_cache rule if it is defined.
-    std::string edit_cmd = this->GetEditCacheCommand();
-    if (!edit_cmd.empty()) {
-      singleLine.push_back(edit_cmd);
-      singleLine.push_back("-H$(CMAKE_SOURCE_DIR)");
-      singleLine.push_back("-B$(CMAKE_BINARY_DIR)");
-      gti.Message = "Running CMake cache editor...";
-      gti.UsesTerminal = true;
-      gti.CommandLines.push_back(singleLine);
-    } else {
-      singleLine.push_back(cmSystemTools::GetCMakeCommand());
-      singleLine.push_back("-E");
-      singleLine.push_back("echo");
-      singleLine.push_back("No interactive CMake dialog available.");
-      gti.Message = "No interactive CMake dialog available...";
-      gti.UsesTerminal = false;
-      gti.CommandLines.push_back(singleLine);
-    }
+  if (!editCacheTargetName) {
+    return;
+  }
+  GlobalTargetInfo gti;
+  gti.Name = editCacheTargetName;
+  cmCustomCommandLine singleLine;
 
-    targets.push_back(gti);
+  // Use generator preference for the edit_cache rule if it is defined.
+  std::string edit_cmd = this->GetEditCacheCommand();
+  if (!edit_cmd.empty()) {
+    singleLine.push_back(std::move(edit_cmd));
+    singleLine.push_back("-H$(CMAKE_SOURCE_DIR)");
+    singleLine.push_back("-B$(CMAKE_BINARY_DIR)");
+    gti.Message = "Running CMake cache editor...";
+    gti.UsesTerminal = true;
+  } else {
+    singleLine.push_back(cmSystemTools::GetCMakeCommand());
+    singleLine.push_back("-E");
+    singleLine.push_back("echo");
+    singleLine.push_back("No interactive CMake dialog available.");
+    gti.Message = "No interactive CMake dialog available...";
+    gti.UsesTerminal = false;
   }
+  gti.CommandLines.push_back(std::move(singleLine));
+
+  targets.push_back(std::move(gti));
 }
 
 void cmGlobalGenerator::AddGlobalTarget_RebuildCache(
   std::vector<GlobalTargetInfo>& targets)
 {
   const char* rebuildCacheTargetName = this->GetRebuildCacheTargetName();
-  if (rebuildCacheTargetName) {
-    GlobalTargetInfo gti;
-    gti.Name = rebuildCacheTargetName;
-    gti.Message = "Running CMake to regenerate build system...";
-    gti.UsesTerminal = true;
-    cmCustomCommandLine singleLine;
-    singleLine.push_back(cmSystemTools::GetCMakeCommand());
-    singleLine.push_back("-H$(CMAKE_SOURCE_DIR)");
-    singleLine.push_back("-B$(CMAKE_BINARY_DIR)");
-    gti.CommandLines.push_back(singleLine);
-    targets.push_back(gti);
+  if (!rebuildCacheTargetName) {
+    return;
   }
+  GlobalTargetInfo gti;
+  gti.Name = rebuildCacheTargetName;
+  gti.Message = "Running CMake to regenerate build system...";
+  gti.UsesTerminal = true;
+  cmCustomCommandLine singleLine;
+  singleLine.push_back(cmSystemTools::GetCMakeCommand());
+  singleLine.push_back("-H$(CMAKE_SOURCE_DIR)");
+  singleLine.push_back("-B$(CMAKE_BINARY_DIR)");
+  gti.CommandLines.push_back(std::move(singleLine));
+  targets.push_back(std::move(gti));
 }
 
 void cmGlobalGenerator::AddGlobalTarget_Install(
@@ -2457,7 +2456,7 @@ void cmGlobalGenerator::AddGlobalTarget_Install(
       gti.Name = "list_install_components";
       gti.Message = ostr.str();
       gti.UsesTerminal = false;
-      targets.push_back(gti);
+      targets.push_back(std::move(gti));
     }
     std::string cmd = cmSystemTools::GetCMakeCommand();
     GlobalTargetInfo gti;
@@ -2511,7 +2510,7 @@ void cmGlobalGenerator::AddGlobalTarget_Install(
       localCmdLine.insert(localCmdLine.begin() + 1,
                           "-DCMAKE_INSTALL_LOCAL_ONLY=1");
 
-      gti.CommandLines.push_back(localCmdLine);
+      gti.CommandLines.push_back(std::move(localCmdLine));
       targets.push_back(gti);
     }
 
@@ -2527,7 +2526,7 @@ void cmGlobalGenerator::AddGlobalTarget_Install(
 
       stripCmdLine.insert(stripCmdLine.begin() + 1,
                           "-DCMAKE_INSTALL_DO_STRIP=1");
-      gti.CommandLines.push_back(stripCmdLine);
+      gti.CommandLines.push_back(std::move(stripCmdLine));
       targets.push_back(gti);
     }
   }
@@ -2971,7 +2970,7 @@ void cmGlobalGenerator::WriteSummary(cmGeneratorTarget* target)
     std::vector<std::string> configs;
     target->Target->GetMakefile()->GetConfigurations(configs);
     if (configs.empty()) {
-      configs.push_back("");
+      configs.emplace_back();
     }
     for (std::string const& c : configs) {
       target->GetSourceFiles(sources, c);

Source/cmGlobalNinjaGenerator.cxx

@@ -1727,7 +1727,7 @@ bool cmGlobalNinjaGenerator::WriteDyndepFile(
         info.Requires.push_back(ddi_require.asString());
       }
     }
-    objects.push_back(info);
+    objects.push_back(std::move(info));
   }
 
   // Map from module name to module file path, if known.

Source/cmGlobalUnixMakefileGenerator3.cxx

@@ -420,7 +420,7 @@ void cmGlobalUnixMakefileGenerator3::WriteDirectoryRule2(
         std::string tname = lg->GetRelativeTargetDirectory(gtarget);
         tname += "/";
         tname += pass;
-        depends.push_back(tname);
+        depends.push_back(std::move(tname));
       }
     }
   }
@@ -432,7 +432,7 @@ void cmGlobalUnixMakefileGenerator3::WriteDirectoryRule2(
     std::string subdir = c.GetDirectory().GetCurrentBinary();
     subdir += "/";
     subdir += pass;
-    depends.push_back(subdir);
+    depends.push_back(std::move(subdir));
   }
 
   // Work-around for makes that drop rules that have no dependencies
@@ -513,7 +513,7 @@ void cmGlobalUnixMakefileGenerator3::GenerateBuildCommand(
     tname =
       conv.ConvertToRelativePath(mf->GetState()->GetBinaryDirectory(), tname);
     cmSystemTools::ConvertToOutputSlashes(tname);
-    makeCommand.push_back(tname);
+    makeCommand.push_back(std::move(tname));
     if (this->Makefiles.empty()) {
       delete mf;
     }

Source/cmGraphVizWriter.cxx

@@ -224,11 +224,11 @@ void cmGraphVizWriter::ReadSettings(const char* settingsFileName,
                                       ignoreTargetsRegExVector);
     for (std::string const& currentRegexString : ignoreTargetsRegExVector) {
       cmsys::RegularExpression currentRegex;
-      if (!currentRegex.compile(currentRegexString.c_str())) {
+      if (!currentRegex.compile(currentRegexString)) {
         std::cerr << "Could not compile bad regex \"" << currentRegexString
                   << "\"" << std::endl;
       }
-      this->TargetsToIgnoreRegex.push_back(currentRegex);
+      this->TargetsToIgnoreRegex.push_back(std::move(currentRegex));
     }
   }
 }

Source/cmIncludeDirectoryCommand.cxx

@@ -97,7 +97,7 @@ void cmIncludeDirectoryCommand::GetIncludes(const std::string& arg,
       std::string inc = arg.substr(lastPos, pos);
       this->NormalizeInclude(inc);
       if (!inc.empty()) {
-        incs.push_back(inc);
+        incs.push_back(std::move(inc));
       }
     }
     lastPos = pos + 1;
@@ -105,7 +105,7 @@ void cmIncludeDirectoryCommand::GetIncludes(const std::string& arg,
   std::string inc = arg.substr(lastPos);
   this->NormalizeInclude(inc);
   if (!inc.empty()) {
-    incs.push_back(inc);
+    incs.push_back(std::move(inc));
   }
 }
 

Source/cmInstallCommand.cxx

@@ -5,6 +5,7 @@
 #include "cmsys/Glob.hxx"
 #include <sstream>
 #include <stddef.h>
+#include <utility>
 
 #include "cmAlgorithms.h"
 #include "cmCommandArgumentsHelper.h"
@@ -1061,7 +1062,7 @@ bool cmInstallCommand::HandleDirectoryMode(
       }
 
       // Store the directory for installation.
-      dirs.push_back(dir);
+      dirs.push_back(std::move(dir));
     } else if (doing == DoingConfigurations) {
       configurations.push_back(args[i]);
     } else if (doing == DoingDestination) {
@@ -1133,7 +1134,7 @@ bool cmInstallCommand::HandleDirectoryMode(
 
   // Support installing an empty directory.
   if (dirs.empty() && destination) {
-    dirs.push_back("");
+    dirs.emplace_back();
   }
 
   // Check if there is something to do.
@@ -1388,7 +1389,7 @@ bool cmInstallCommand::MakeFilesFullPath(
       return false;
     }
     // Store the file for installation.
-    absFiles.push_back(file);
+    absFiles.push_back(std::move(file));
   }
   return true;
 }

Source/cmInstallCommandArguments.cxx

@@ -4,6 +4,8 @@
 
 #include "cmSystemTools.h"
 
+#include <utility>
+
 // Table of valid permissions.
 const char* cmInstallCommandArguments::PermissionsTable[] = {
   "OWNER_READ",    "OWNER_WRITE",   "OWNER_EXECUTE", "GROUP_READ",
@@ -200,6 +202,6 @@ void cmInstallCommandIncludesArgument::Parse(
   for (; it != args->end(); ++it) {
     std::string dir = *it;
     cmSystemTools::ConvertToUnixSlashes(dir);
-    this->IncludeDirs.push_back(dir);
+    this->IncludeDirs.push_back(std::move(dir));
   }
 }

Source/cmInstallFilesCommand.cxx

@@ -30,8 +30,7 @@ bool cmInstallFilesCommand::InitialPass(std::vector<std::string> const& args,
     for (std::vector<std::string>::const_iterator s = args.begin() + 2;
          s != args.end(); ++s) {
       // Find the source location for each file listed.
-      std::string f = this->FindInstallSource(s->c_str());
-      this->Files.push_back(f);
+      this->Files.push_back(this->FindInstallSource(s->c_str()));
     }
     this->CreateInstallGenerator();
   } else {

Source/cmInstallTargetGenerator.cxx

@@ -132,8 +132,8 @@ void cmInstallTargetGenerator::GenerateScriptForConfig(
     if (this->ImportLibrary) {
       std::string from1 = fromDirConfig + targetNameImport;
       std::string to1 = toDir + targetNameImport;
-      filesFrom.push_back(from1);
-      filesTo.push_back(to1);
+      filesFrom.push_back(std::move(from1));
+      filesTo.push_back(std::move(to1));
       std::string targetNameImportLib;
       if (this->Target->GetImplibGNUtoMS(targetNameImport,
                                          targetNameImportLib)) {
@@ -176,13 +176,13 @@ void cmInstallTargetGenerator::GenerateScriptForConfig(
         if (targetNameReal != targetName) {
           std::string from2 = fromDirConfig + targetNameReal;
           std::string to2 = toDir += targetNameReal;
-          filesFrom.push_back(from2);
-          filesTo.push_back(to2);
+          filesFrom.push_back(std::move(from2));
+          filesTo.push_back(std::move(to2));
         }
       }
 
-      filesFrom.push_back(from1);
-      filesTo.push_back(to1);
+      filesFrom.push_back(std::move(from1));
+      filesTo.push_back(std::move(to1));
     }
   } else {
     std::string targetName;
@@ -198,8 +198,8 @@ void cmInstallTargetGenerator::GenerateScriptForConfig(
 
       std::string from1 = fromDirConfig + targetNameImport;
       std::string to1 = toDir + targetNameImport;
-      filesFrom.push_back(from1);
-      filesTo.push_back(to1);
+      filesFrom.push_back(std::move(from1));
+      filesTo.push_back(std::move(to1));
       std::string targetNameImportLib;
       if (this->Target->GetImplibGNUtoMS(targetNameImport,
                                          targetNameImportLib)) {
@@ -223,8 +223,8 @@ void cmInstallTargetGenerator::GenerateScriptForConfig(
       // Tweaks apply to the binary inside the bundle.
       std::string to1 = toDir + targetNameReal;
 
-      filesFrom.push_back(from1);
-      filesTo.push_back(to1);
+      filesFrom.push_back(std::move(from1));
+      filesTo.push_back(std::move(to1));
     } else if (this->Target->IsCFBundleOnApple()) {
       // Install the whole app bundle directory.
       type = cmInstallType_DIRECTORY;
@@ -235,8 +235,8 @@ void cmInstallTargetGenerator::GenerateScriptForConfig(
       std::string from1 = fromDirConfig + targetNameBase;
       std::string to1 = toDir + targetName;
 
-      filesFrom.push_back(from1);
-      filesTo.push_back(to1);
+      filesFrom.push_back(std::move(from1));
+      filesTo.push_back(std::move(to1));
     } else {
       bool haveNamelink = false;
 

Source/cmListFileCache.cxx

@@ -252,8 +252,7 @@ bool cmListFileParser::ParseFunction(const char* name, long line)
 bool cmListFileParser::AddArgument(cmListFileLexer_Token* token,
                                    cmListFileArgument::Delimiter delim)
 {
-  cmListFileArgument a(token->text, delim, token->line);
-  this->Function.Arguments.push_back(a);
+  this->Function.Arguments.emplace_back(token->text, delim, token->line);
   if (this->Separation == SeparationOkay) {
     return true;
   }

Source/cmLocalGenerator.cxx

@@ -207,7 +207,7 @@ void cmLocalGenerator::TraceDependencies()
   std::vector<std::string> configs;
   this->Makefile->GetConfigurations(configs);
   if (configs.empty()) {
-    configs.push_back("");
+    configs.emplace_back();
   }
   for (std::string const& c : configs) {
     this->GlobalGenerator->CreateEvaluationSourceFiles(c);
@@ -602,7 +602,7 @@ void cmLocalGenerator::ComputeTargetManifest()
   std::vector<std::string> configNames;
   this->Makefile->GetConfigurations(configNames);
   if (configNames.empty()) {
-    configNames.push_back("");
+    configNames.emplace_back();
   }
 
   // Add our targets to the manifest for each configuration.
@@ -623,7 +623,7 @@ bool cmLocalGenerator::ComputeTargetCompileFeatures()
   std::vector<std::string> configNames;
   this->Makefile->GetConfigurations(configNames);
   if (configNames.empty()) {
-    configNames.push_back("");
+    configNames.emplace_back();
   }
 
   // Process compile features of all targets.
@@ -906,7 +906,7 @@ void cmLocalGenerator::GetIncludeDirectories(std::vector<std::string>& dirs,
     for (std::string const& i : impDirVec) {
       std::string d = rootPath + i;
       cmSystemTools::ConvertToUnixSlashes(d);
-      emitted.insert(d);
+      emitted.insert(std::move(d));
       if (!stripImplicitInclDirs) {
         implicitDirs.push_back(i);
       }
@@ -2002,7 +2002,7 @@ void cmLocalGenerator::AppendIncludeDirectories(
     }
 
     if (uniqueIncludes.insert(inc).second) {
-      includes.push_back(inc);
+      includes.push_back(std::move(inc));
     }
   }
 }

Source/cmLocalUnixMakefileGenerator3.cxx

@@ -191,7 +191,7 @@ void cmLocalUnixMakefileGenerator3::GetLocalObjectFiles(
       }
       LocalObjectInfo& info = localObjectFiles[objectName];
       info.HasSourceExtension = hasSourceExtension;
-      info.push_back(LocalObjectEntry(gt, sf->GetLanguage()));
+      info.emplace_back(gt, sf->GetLanguage());
     }
   }
 }
@@ -750,11 +750,11 @@ void cmLocalUnixMakefileGenerator3::WriteSpecialTargetsTop(
     static_cast<cmGlobalUnixMakefileGenerator3*>(this->GlobalGenerator);
   std::string hack = gg->GetEmptyRuleHackDepends();
   if (!hack.empty()) {
-    no_depends.push_back(hack);
+    no_depends.push_back(std::move(hack));
   }
   std::string hack_cmd = gg->GetEmptyRuleHackCommand();
   if (!hack_cmd.empty()) {
-    no_commands.push_back(hack_cmd);
+    no_commands.push_back(std::move(hack_cmd));
   }
 
   // Special symbolic target that never exists to force dependers to
@@ -788,7 +788,7 @@ void cmLocalUnixMakefileGenerator3::WriteSpecialTargetsBottom(
 
     std::vector<std::string> no_depends;
     std::vector<std::string> commands;
-    commands.push_back(runRule);
+    commands.push_back(std::move(runRule));
     if (!this->IsRootMakefile()) {
       this->CreateCDCommand(commands, this->GetBinaryDirectory(),
                             this->GetCurrentBinaryDirectory());
@@ -888,7 +888,7 @@ void cmLocalUnixMakefileGenerator3::AppendCustomDepend(
     // Lookup the real name of the dependency in case it is a CMake target.
     std::string dep;
     if (this->GetRealDependency(d, this->ConfigName, dep)) {
-      depends.push_back(dep);
+      depends.push_back(std::move(dep));
     }
   }
 }
@@ -1037,7 +1037,7 @@ void cmLocalUnixMakefileGenerator3::AppendCustomCommand(
           cmd = "echo >nul && " + cmd;
         }
       }
-      commands1.push_back(cmd);
+      commands1.push_back(std::move(cmd));
     }
   }
 
@@ -1075,12 +1075,14 @@ void cmLocalUnixMakefileGenerator3::AppendCleanCommand(
     }
     fout << ")\n";
   }
-  std::string remove = "$(CMAKE_COMMAND) -P ";
-  remove += this->ConvertToOutputFormat(
-    this->MaybeConvertToRelativePath(this->GetCurrentBinaryDirectory(),
-                                     cleanfile),
-    cmOutputConverter::SHELL);
-  commands.push_back(remove);
+  {
+    std::string remove = "$(CMAKE_COMMAND) -P ";
+    remove += this->ConvertToOutputFormat(
+      this->MaybeConvertToRelativePath(this->GetCurrentBinaryDirectory(),
+                                       cleanfile),
+      cmOutputConverter::SHELL);
+    commands.push_back(std::move(remove));
+  }
 
   // For the main clean rule add per-language cleaning.
   if (!filename) {
@@ -1158,7 +1160,7 @@ void cmLocalUnixMakefileGenerator3::AppendEcho(
           }
           cmd += this->EscapeForShell(line);
         }
-        commands.push_back(cmd);
+        commands.push_back(std::move(cmd));
       }
 
       // Reset the line to empty.
@@ -1675,13 +1677,15 @@ void cmLocalUnixMakefileGenerator3::WriteLocalAllRules(
   commands.clear();
   std::string cmakefileName = cmake::GetCMakeFilesDirectoryPostSlash();
   cmakefileName += "Makefile.cmake";
-  std::string runRule =
-    "$(CMAKE_COMMAND) -H$(CMAKE_SOURCE_DIR) -B$(CMAKE_BINARY_DIR)";
-  runRule += " --check-build-system ";
-  runRule +=
-    this->ConvertToOutputFormat(cmakefileName, cmOutputConverter::SHELL);
-  runRule += " 1";
-  commands.push_back(runRule);
+  {
+    std::string runRule =
+      "$(CMAKE_COMMAND) -H$(CMAKE_SOURCE_DIR) -B$(CMAKE_BINARY_DIR)";
+    runRule += " --check-build-system ";
+    runRule +=
+      this->ConvertToOutputFormat(cmakefileName, cmOutputConverter::SHELL);
+    runRule += " 1";
+    commands.push_back(std::move(runRule));
+  }
   this->CreateCDCommand(commands, this->GetBinaryDirectory(),
                         this->GetCurrentBinaryDirectory());
   this->WriteMakeRule(ruleFileStream, "clear depends", "depend", depends,
@@ -2066,7 +2070,7 @@ void cmLocalUnixMakefileGenerator3::CreateCDCommand(
     // Change back to the starting directory.
     cmd = cd_cmd;
     cmd += this->ConvertToOutputForExisting(relDir);
-    commands.push_back(cmd);
+    commands.push_back(std::move(cmd));
   } else {
     // On UNIX we must construct a single shell command to change
     // directory and build because make resets the directory between

Source/cmMacroCommand.cxx

@@ -4,6 +4,7 @@
 
 #include <sstream>
 #include <stdio.h>
+#include <utility>
 
 #include "cmAlgorithms.h"
 #include "cmExecutionStatus.h"
@@ -131,7 +132,7 @@ bool cmMacroHelperCommand::InvokeInitialPass(
       }
       arg.Delim = k.Delim;
       arg.Line = k.Line;
-      newLFF.Arguments.push_back(arg);
+      newLFF.Arguments.push_back(std::move(arg));
     }
     cmExecutionStatus status;
     if (!this->Makefile->ExecuteCommand(newLFF, status) ||

Source/cmMakefile.cxx

@@ -20,7 +20,7 @@
 #include "cmCustomCommand.h"
 #include "cmCustomCommandLines.h"
 #include "cmExecutionStatus.h"
-#include "cmExpandedCommandArgument.h"
+#include "cmExpandedCommandArgument.h" // IWYU pragma: keep
 #include "cmFileLockPool.h"
 #include "cmFunctionBlocker.h"
 #include "cmGeneratorExpression.h"
@@ -95,8 +95,7 @@ cmMakefile::cmMakefile(cmGlobalGenerator* globalGenerator,
   this->AddSourceGroup("Object Files", "\\.(lo|o|obj)$");
 
   this->ObjectLibrariesSourceGroupIndex = this->SourceGroups.size();
-  this->SourceGroups.push_back(
-    cmSourceGroup("Object Libraries", "^MATCH_NO_SOURCES$"));
+  this->SourceGroups.emplace_back("Object Libraries", "^MATCH_NO_SOURCES$");
 #endif
 }
 
@@ -1032,7 +1031,7 @@ cmTarget* cmMakefile::AddUtilityCommand(
     commandLine.push_back(arg4);
   }
   cmCustomCommandLines commandLines;
-  commandLines.push_back(commandLine);
+  commandLines.push_back(std::move(commandLine));
 
   // Call the real signature of this method.
   return this->AddUtilityCommand(utilityName, origin, excludeFromAll,
@@ -1480,8 +1479,8 @@ void cmMakefile::Configure()
     if (!hasProject) {
       cmListFileFunction project;
       project.Name = "PROJECT";
-      cmListFileArgument prj("Project", cmListFileArgument::Unquoted, 0);
-      project.Arguments.push_back(prj);
+      project.Arguments.emplace_back("Project", cmListFileArgument::Unquoted,
+                                     0);
       listFile.Functions.insert(listFile.Functions.begin(), project);
     }
   }
@@ -3033,7 +3032,7 @@ bool cmMakefile::ExpandArguments(
   for (cmListFileArgument const& i : inArgs) {
     // No expansion in a bracket argument.
     if (i.Delim == cmListFileArgument::Bracket) {
-      outArgs.push_back(cmExpandedCommandArgument(i.Value, true));
+      outArgs.emplace_back(i.Value, true);
       continue;
     }
     // Expand the variables in the argument.
@@ -3044,12 +3043,12 @@ bool cmMakefile::ExpandArguments(
     // If the argument is quoted, it should be one argument.
     // Otherwise, it may be a list of arguments.
     if (i.Delim == cmListFileArgument::Quoted) {
-      outArgs.push_back(cmExpandedCommandArgument(value, true));
+      outArgs.emplace_back(value, true);
     } else {
       std::vector<std::string> stringArgs;
       cmSystemTools::ExpandListArgument(value, stringArgs);
       for (std::string const& stringArg : stringArgs) {
-        outArgs.push_back(cmExpandedCommandArgument(stringArg, false));
+        outArgs.emplace_back(stringArg, false);
       }
     }
   }

Source/cmMakefileExecutableTargetGenerator.cxx

@@ -617,7 +617,7 @@ void cmMakefileExecutableTargetGenerator::WriteExecutableRule(bool relink)
         cmSystemTools::GetCMakeCommand(), cmLocalGenerator::SHELL);
       cmakeCommand += " -E __run_co_compile --lwyu=";
       cmakeCommand += targetOutPathReal;
-      real_link_commands.push_back(cmakeCommand);
+      real_link_commands.push_back(std::move(cmakeCommand));
     }
 
     std::string launcher;
@@ -666,7 +666,7 @@ void cmMakefileExecutableTargetGenerator::WriteExecutableRule(bool relink)
     symlink += targetOutPathReal;
     symlink += " ";
     symlink += targetOutPath;
-    commands1.push_back(symlink);
+    commands1.push_back(std::move(symlink));
     this->LocalGenerator->CreateCDCommand(
       commands1, this->Makefile->GetCurrentBinaryDirectory(),
       this->LocalGenerator->GetBinaryDirectory());

Source/cmMakefileLibraryTargetGenerator.cxx

@@ -897,7 +897,7 @@ void cmMakefileLibraryTargetGenerator::WriteLibraryRules(
           std::string cmd = launcher + acc;
           rulePlaceholderExpander->ExpandRuleVariables(this->LocalGenerator,
                                                        cmd, vars);
-          real_link_commands.push_back(cmd);
+          real_link_commands.push_back(std::move(cmd));
         }
       }
       // Append to the archive with the other object sets.
@@ -907,7 +907,7 @@ void cmMakefileLibraryTargetGenerator::WriteLibraryRules(
           std::string cmd = launcher + aac;
           rulePlaceholderExpander->ExpandRuleVariables(this->LocalGenerator,
                                                        cmd, vars);
-          real_link_commands.push_back(cmd);
+          real_link_commands.push_back(std::move(cmd));
         }
       }
       // Finish the archive.
@@ -918,7 +918,7 @@ void cmMakefileLibraryTargetGenerator::WriteLibraryRules(
                                                      vars);
         // If there is no ranlib the command will be ":".  Skip it.
         if (!cmd.empty() && cmd[0] != ':') {
-          real_link_commands.push_back(cmd);
+          real_link_commands.push_back(std::move(cmd));
         }
       }
     } else {
@@ -931,7 +931,7 @@ void cmMakefileLibraryTargetGenerator::WriteLibraryRules(
           cmSystemTools::GetCMakeCommand(), cmLocalGenerator::SHELL);
         cmakeCommand += " -E __run_co_compile --lwyu=";
         cmakeCommand += targetOutPathReal;
-        real_link_commands.push_back(cmakeCommand);
+        real_link_commands.push_back(std::move(cmakeCommand));
       }
 
       // Expand placeholders.
@@ -972,7 +972,7 @@ void cmMakefileLibraryTargetGenerator::WriteLibraryRules(
     symlink += targetOutPathSO;
     symlink += " ";
     symlink += targetOutPath;
-    commands1.push_back(symlink);
+    commands1.push_back(std::move(symlink));
     this->LocalGenerator->CreateCDCommand(
       commands1, this->Makefile->GetCurrentBinaryDirectory(),
       this->LocalGenerator->GetBinaryDirectory());

Source/cmMakefileTargetGenerator.cxx

@@ -327,7 +327,7 @@ void cmMakefileTargetGenerator::MacOSXContentGeneratorType::operator()(
   copyCommand += " ";
   copyCommand += this->Generator->LocalGenerator->ConvertToOutputFormat(
     output, cmOutputConverter::SHELL);
-  commands.push_back(copyCommand);
+  commands.push_back(std::move(copyCommand));
   this->Generator->LocalGenerator->WriteMakeRule(
     *this->Generator->BuildFileStream, nullptr, output, depends, commands,
     false);
@@ -797,7 +797,7 @@ void cmMakefileTargetGenerator::WriteObjectBuildFile(
       } else {
         std::string cmd = "$(CMAKE_COMMAND) -E cmake_unimplemented_variable ";
         cmd += preprocessRuleVar;
-        commands.push_back(cmd);
+        commands.push_back(std::move(cmd));
       }
 
       this->LocalGenerator->WriteMakeRule(*this->BuildFileStream, nullptr,
@@ -844,7 +844,7 @@ void cmMakefileTargetGenerator::WriteObjectBuildFile(
       } else {
         std::string cmd = "$(CMAKE_COMMAND) -E cmake_unimplemented_variable ";
         cmd += assemblyRuleVar;
-        commands.push_back(cmd);
+        commands.push_back(std::move(cmd));
       }
 
       this->LocalGenerator->WriteMakeRule(*this->BuildFileStream, nullptr,
@@ -1345,12 +1345,12 @@ void cmMakefileTargetGenerator::AppendObjectDepends(
   std::vector<std::string>& depends)
 {
   // Add dependencies on the compiled object files.
-  std::string relPath = this->LocalGenerator->GetHomeRelativeOutputPath();
-  std::string objTarget;
+  std::string const& relPath =
+    this->LocalGenerator->GetHomeRelativeOutputPath();
   for (std::string const& obj : this->Objects) {
-    objTarget = relPath;
+    std::string objTarget = relPath;
     objTarget += obj;
-    depends.push_back(objTarget);
+    depends.push_back(std::move(objTarget));
   }
 
   // Add dependencies on the external object files.
@@ -1441,8 +1441,8 @@ void cmMakefileTargetGenerator::CreateLinkScript(
       this->LocalGenerator->GetCurrentBinaryDirectory(), linkScriptName),
     cmOutputConverter::SHELL);
   link_command += " --verbose=$(VERBOSE)";
-  makefile_commands.push_back(link_command);
-  makefile_depends.push_back(linkScriptName);
+  makefile_commands.push_back(std::move(link_command));
+  makefile_depends.push_back(std::move(linkScriptName));
 }
 
 bool cmMakefileTargetGenerator::CheckUseResponseFileForObjects(
@@ -1514,7 +1514,7 @@ std::string cmMakefileTargetGenerator::CreateResponseFile(
 
   // Add a dependency so the target will rebuild when the set of
   // objects changes.
-  makefile_depends.push_back(responseFileNameFull);
+  makefile_depends.push_back(std::move(responseFileNameFull));
 
   // Construct the name to be used on the command line.
   std::string responseFileName = this->TargetBuildDirectory;

Source/cmMakefileUtilityTargetGenerator.cxx

@@ -4,6 +4,7 @@
 
 #include <ostream>
 #include <string>
+#include <utility>
 #include <vector>
 
 #include "cmGeneratedFileStream.h"
@@ -90,7 +91,7 @@ void cmMakefileUtilityTargetGenerator::WriteRuleFiles()
   if (depends.empty() && commands.empty()) {
     std::string hack = this->GlobalGenerator->GetEmptyRuleHackDepends();
     if (!hack.empty()) {
-      depends.push_back(hack);
+      depends.push_back(std::move(hack));
     }
   }
 

Source/cmNinjaNormalTargetGenerator.cxx

@@ -498,13 +498,12 @@ std::vector<std::string> cmNinjaNormalTargetGenerator::ComputeLinkCmd()
         cmakeCommand += " -E __run_co_compile --lwyu=";
         cmGeneratorTarget& gt = *this->GetGeneratorTarget();
         const std::string cfgName = this->GetConfigName();
-        std::string targetOutput = ConvertToNinjaPath(gt.GetFullPath(cfgName));
         std::string targetOutputReal = this->ConvertToNinjaPath(
           gt.GetFullPath(cfgName, cmStateEnums::RuntimeBinaryArtifact,
                          /*realname=*/true));
         cmakeCommand += targetOutputReal;
         cmakeCommand += " || true";
-        linkCmds.push_back(cmakeCommand);
+        linkCmds.push_back(std::move(cmakeCommand));
       }
       return linkCmds;
     }
@@ -978,7 +977,7 @@ void cmNinjaNormalTargetGenerator::WriteLinkStatement()
     std::string obj_list_file = mdi->DefFile + ".objs";
     cmd += this->GetLocalGenerator()->ConvertToOutputFormat(
       obj_list_file, cmOutputConverter::SHELL);
-    preLinkCmdLines.push_back(cmd);
+    preLinkCmdLines.push_back(std::move(cmd));
 
     // create a list of obj files for the -E __create_def to read
     cmGeneratedFileStream fout(obj_list_file.c_str());

Source/cmNinjaTargetGenerator.cxx

@@ -1188,7 +1188,7 @@ void cmNinjaTargetGenerator::MacOSXContentGeneratorType::operator()(
                                                                  output);
 
   // Add as a dependency to the target so that it gets called.
-  this->Generator->ExtraFiles.push_back(output);
+  this->Generator->ExtraFiles.push_back(std::move(output));
 }
 
 void cmNinjaTargetGenerator::addPoolNinjaVariable(

Source/cmQTWrapCPPCommand.cxx

@@ -7,6 +7,8 @@
 #include "cmSourceFile.h"
 #include "cmSystemTools.h"
 
+#include <utility>
+
 class cmExecutionStatus;
 
 // cmQTWrapCPPCommand
@@ -71,7 +73,7 @@ bool cmQTWrapCPPCommand::InitialPass(std::vector<std::string> const& args,
       commandLine.push_back(hname);
 
       cmCustomCommandLines commandLines;
-      commandLines.push_back(commandLine);
+      commandLines.push_back(std::move(commandLine));
 
       std::vector<std::string> depends;
       depends.push_back(moc_exe);

Source/cmQTWrapUICommand.cxx

@@ -7,6 +7,8 @@
 #include "cmSourceFile.h"
 #include "cmSystemTools.h"
 
+#include <utility>
+
 class cmExecutionStatus;
 
 // cmQTWrapUICommand
@@ -86,7 +88,7 @@ bool cmQTWrapUICommand::InitialPass(std::vector<std::string> const& args,
       hCommand.push_back(hName);
       hCommand.push_back(uiName);
       cmCustomCommandLines hCommandLines;
-      hCommandLines.push_back(hCommand);
+      hCommandLines.push_back(std::move(hCommand));
 
       cmCustomCommandLine cxxCommand;
       cxxCommand.push_back(uic_exe);
@@ -96,7 +98,7 @@ bool cmQTWrapUICommand::InitialPass(std::vector<std::string> const& args,
       cxxCommand.push_back(cxxName);
       cxxCommand.push_back(uiName);
       cmCustomCommandLines cxxCommandLines;
-      cxxCommandLines.push_back(cxxCommand);
+      cxxCommandLines.push_back(std::move(cxxCommand));
 
       cmCustomCommandLine mocCommand;
       mocCommand.push_back(moc_exe);
@@ -104,7 +106,7 @@ bool cmQTWrapUICommand::InitialPass(std::vector<std::string> const& args,
       mocCommand.push_back(mocName);
       mocCommand.push_back(hName);
       cmCustomCommandLines mocCommandLines;
-      mocCommandLines.push_back(mocCommand);
+      mocCommandLines.push_back(std::move(mocCommand));
 
       std::vector<std::string> depends;
       depends.push_back(uiName);

Source/cmSearchPath.cxx

@@ -155,7 +155,7 @@ void cmSearchPath::AddSuffixes(const std::vector<std::string>& suffixes)
     }
 
     // And now the original w/o any suffix
-    this->Paths.push_back(inPath);
+    this->Paths.push_back(std::move(inPath));
   }
 }
 
@@ -212,6 +212,6 @@ void cmSearchPath::AddPathInternal(const std::string& path, const char* base)
 
   // Insert the path if has not already been emitted.
   if (this->FC->SearchPathsEmitted.insert(collapsed).second) {
-    this->Paths.push_back(collapsed);
+    this->Paths.push_back(std::move(collapsed));
   }
 }

Source/cmServerProtocol.cxx

@@ -111,16 +111,16 @@ void getCMakeInputs(const cmGlobalGenerator* gg, const std::string& sourceDir,
 
       if (isInternal) {
         if (internalFiles) {
-          internalFiles->push_back(toAdd);
+          internalFiles->push_back(std::move(toAdd));
         }
       } else {
         if (isTemporary) {
           if (tmpFiles) {
-            tmpFiles->push_back(toAdd);
+            tmpFiles->push_back(std::move(toAdd));
           }
         } else {
           if (explicitFiles) {
-            explicitFiles->push_back(toAdd);
+            explicitFiles->push_back(std::move(toAdd));
           }
         }
       }

Source/cmSystemTools.cxx

@@ -1153,7 +1153,7 @@ void cmSystemTools::Glob(const std::string& directory,
     for (i = 0; i < numf; i++) {
       std::string fname = d.GetFile(i);
       if (reg.find(fname)) {
-        files.push_back(fname);
+        files.push_back(std::move(fname));
       }
     }
   }

Source/cmTarget.cxx

@@ -500,7 +500,7 @@ void cmTarget::AddSources(std::vector<std::string> const& srcs)
   }
   if (!srcFiles.empty()) {
     cmListFileBacktrace lfbt = this->Makefile->GetBacktrace();
-    this->Internal->SourceEntries.push_back(srcFiles);
+    this->Internal->SourceEntries.push_back(std::move(srcFiles));
     this->Internal->SourceBacktraces.push_back(lfbt);
   }
 }
@@ -747,10 +747,12 @@ void cmTarget::AddLinkLibrary(cmMakefile& mf, const std::string& lib,
     return;
   }
 
-  cmTarget::LibraryID tmp;
-  tmp.first = lib;
-  tmp.second = llt;
-  this->OriginalLinkLibraries.push_back(tmp);
+  {
+    cmTarget::LibraryID tmp;
+    tmp.first = lib;
+    tmp.second = llt;
+    this->OriginalLinkLibraries.emplace_back(lib, llt);
+  }
 
   // Add the explicit dependency information for this target. This is
   // simply a set of libraries separated by ";". There should always

Source/cmVariableWatchCommand.cxx

@@ -43,16 +43,14 @@ static void cmVariableWatchCommandVariableAccessed(const std::string& variable,
   std::string stack = makefile->GetProperty("LISTFILE_STACK");
   if (!data->Command.empty()) {
     newLFF.Arguments.clear();
-    newLFF.Arguments.push_back(
-      cmListFileArgument(variable, cmListFileArgument::Quoted, 9999));
-    newLFF.Arguments.push_back(
-      cmListFileArgument(accessString, cmListFileArgument::Quoted, 9999));
-    newLFF.Arguments.push_back(cmListFileArgument(
-      newValue ? newValue : "", cmListFileArgument::Quoted, 9999));
-    newLFF.Arguments.push_back(
-      cmListFileArgument(currentListFile, cmListFileArgument::Quoted, 9999));
-    newLFF.Arguments.push_back(
-      cmListFileArgument(stack, cmListFileArgument::Quoted, 9999));
+    newLFF.Arguments.emplace_back(variable, cmListFileArgument::Quoted, 9999);
+    newLFF.Arguments.emplace_back(accessString, cmListFileArgument::Quoted,
+                                  9999);
+    newLFF.Arguments.emplace_back(newValue ? newValue : "",
+                                  cmListFileArgument::Quoted, 9999);
+    newLFF.Arguments.emplace_back(currentListFile, cmListFileArgument::Quoted,
+                                  9999);
+    newLFF.Arguments.emplace_back(stack, cmListFileArgument::Quoted, 9999);
     newLFF.Name = data->Command;
     newLFF.Line = 9999;
     cmExecutionStatus status;

Source/cmake.cxx

@@ -912,7 +912,7 @@ void cmake::GetRegisteredGenerators(
       info.name = name;
       info.baseName = name;
       info.isAlias = false;
-      generators.push_back(info);
+      generators.push_back(std::move(info));
     }
   }
 
@@ -928,7 +928,7 @@ void cmake::GetRegisteredGenerators(
       info.supportsPlatform = false;
       info.supportsToolset = false;
       info.isAlias = false;
-      generators.push_back(info);
+      generators.push_back(std::move(info));
     }
     for (std::string const& a : eg->Aliases) {
       GeneratorInfo info;
@@ -940,7 +940,7 @@ void cmake::GetRegisteredGenerators(
       info.supportsPlatform = false;
       info.supportsToolset = false;
       info.isAlias = true;
-      generators.push_back(info);
+      generators.push_back(std::move(info));
     }
   }
 }
@@ -1167,7 +1167,7 @@ int cmake::HandleDeleteCacheVariables(const std::string& var)
         save.help = help;
       }
     }
-    saved.push_back(save);
+    saved.push_back(std::move(save));
   }
 
   // remove the cache
@@ -1807,7 +1807,7 @@ void cmake::GetGeneratorDocumentation(std::vector<cmDocumentationEntry>& v)
   for (cmGlobalGeneratorFactory* g : this->Generators) {
     cmDocumentationEntry e;
     g->GetDocumentation(e);
-    v.push_back(e);
+    v.push_back(std::move(e));
   }
   for (cmExternalMakefileProjectGeneratorFactory* eg : this->ExtraGenerators) {
     const std::string doc = eg->GetDocumentation();
@@ -1818,7 +1818,7 @@ void cmake::GetGeneratorDocumentation(std::vector<cmDocumentationEntry>& v)
       cmDocumentationEntry e;
       e.Name = a;
       e.Brief = doc;
-      v.push_back(e);
+      v.push_back(std::move(e));
     }
 
     // Full names:
@@ -1829,7 +1829,7 @@ void cmake::GetGeneratorDocumentation(std::vector<cmDocumentationEntry>& v)
       e.Name =
         cmExternalMakefileProjectGenerator::CreateFullGeneratorName(g, name);
       e.Brief = doc;
-      v.push_back(e);
+      v.push_back(std::move(e));
     }
   }
 }
@@ -2212,9 +2212,7 @@ int cmake::GetSystemInformation(std::vector<std::string>& args)
     std::vector<std::string> args2;
     args2.push_back(args[0]);
     args2.push_back(destPath);
-    std::string resultArg = "-DRESULT_FILE=";
-    resultArg += resultFile;
-    args2.push_back(resultArg);
+    args2.push_back("-DRESULT_FILE=" + resultFile);
     int res = this->Run(args2, false);
 
     if (res != 0) {