Merge topic 'cmake_parse_arguments-keywords_missing_values'

5228432b45 cmake_parse_arguments: add KEYWORDS_MISSING_VALUES
8e746db6e1 cmake_parse_arguments: Factor out part of implementation for re-use

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !2910
diff --git a/Help/release/3.14.rst b/Help/release/3.14.rst
index ff499f5..afc2f5f 100644
--- a/Help/release/3.14.rst
+++ b/Help/release/3.14.rst
@@ -310,8 +310,8 @@
 Other Changes
 =============
 
-* Object library linking has been fixed to propagate transitive link
-  dependencies of object libraries to consuming targets.
+* Object library linking has been fixed to propagate private link libraries
+  of object libraries to consuming targets.
 
 * Install rules under :command:`add_subdirectory` now interleave with those in
   the calling directory. See policy :policy:`CMP0082` for details.
diff --git a/Help/release/dev/FindCups-imported-target.rst b/Help/release/dev/FindCups-imported-target.rst
new file mode 100644
index 0000000..0fd9178
--- /dev/null
+++ b/Help/release/dev/FindCups-imported-target.rst
@@ -0,0 +1,4 @@
+FindCups-imported-target
+------------------------
+
+* The :module:`FindCups` module now provides imported targets.
diff --git a/Modules/CMakeDetermineCCompiler.cmake b/Modules/CMakeDetermineCCompiler.cmake
index d7f6f97..3ec534f 100644
--- a/Modules/CMakeDetermineCCompiler.cmake
+++ b/Modules/CMakeDetermineCCompiler.cmake
@@ -139,8 +139,9 @@
 
   if(CMAKE_C_COMPILER_ID MATCHES "GNU|Clang|QCC")
     get_filename_component(COMPILER_BASENAME "${CMAKE_C_COMPILER}" NAME)
-    if (COMPILER_BASENAME MATCHES "^(.+-)(clang|g?cc)(-[0-9]+\\.[0-9]+\\.[0-9]+)?(\\.exe)?$")
+    if (COMPILER_BASENAME MATCHES "^(.+-)(clang|g?cc)(-[0-9]+(\\.[0-9]+)*)?(-[^.]+)?(\\.exe)?$")
       set(_CMAKE_TOOLCHAIN_PREFIX ${CMAKE_MATCH_1})
+      set(_CMAKE_COMPILER_SUFFIX ${CMAKE_MATCH_5})
     elseif(CMAKE_C_COMPILER_ID MATCHES "Clang")
       if(CMAKE_C_COMPILER_TARGET)
         set(_CMAKE_TOOLCHAIN_PREFIX ${CMAKE_C_COMPILER_TARGET}-)
diff --git a/Modules/CMakeDetermineCXXCompiler.cmake b/Modules/CMakeDetermineCXXCompiler.cmake
index bd878b2..68cb9fe 100644
--- a/Modules/CMakeDetermineCXXCompiler.cmake
+++ b/Modules/CMakeDetermineCXXCompiler.cmake
@@ -136,8 +136,9 @@
 
   if("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU|Clang|QCC")
     get_filename_component(COMPILER_BASENAME "${CMAKE_CXX_COMPILER}" NAME)
-    if (COMPILER_BASENAME MATCHES "^(.+-)(clan)?[gc]\\+\\+(-[0-9]+\\.[0-9]+\\.[0-9]+)?(\\.exe)?$")
+    if (COMPILER_BASENAME MATCHES "^(.+-)(clan)?[gc]\\+\\+(-[0-9]+(\\.[0-9]+)*)?(-[^.]+)?(\\.exe)?$")
       set(_CMAKE_TOOLCHAIN_PREFIX ${CMAKE_MATCH_1})
+      set(_CMAKE_COMPILER_SUFFIX ${CMAKE_MATCH_5})
     elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
       if(CMAKE_CXX_COMPILER_TARGET)
         set(_CMAKE_TOOLCHAIN_PREFIX ${CMAKE_CXX_COMPILER_TARGET}-)
diff --git a/Modules/CMakeDetermineCompilerId.cmake b/Modules/CMakeDetermineCompilerId.cmake
index 2f84c8e..83ce392 100644
--- a/Modules/CMakeDetermineCompilerId.cmake
+++ b/Modules/CMakeDetermineCompilerId.cmake
@@ -360,6 +360,15 @@
     else()
       set(id_sdkroot "")
     endif()
+    set(id_clang_cxx_library "")
+    set(stdlib_regex "(^| )(-stdlib=)([^ ]+)( |$)")
+    string(REGEX MATCHALL "${stdlib_regex}" all_stdlib_matches "${CMAKE_CXX_FLAGS}")
+    if(all_stdlib_matches)
+      list(GET all_stdlib_matches "-1" last_stdlib_match)
+      if(last_stdlib_match MATCHES "${stdlib_regex}")
+        set(id_clang_cxx_library "CLANG_CXX_LIBRARY = \"${CMAKE_MATCH_3}\";")
+      endif()
+    endif()
     configure_file(${CMAKE_ROOT}/Modules/CompilerId/Xcode-3.pbxproj.in
       ${id_dir}/CompilerId${lang}.xcodeproj/project.pbxproj @ONLY)
     unset(_ENV_MACOSX_DEPLOYMENT_TARGET)
diff --git a/Modules/CPackIFW.cmake b/Modules/CPackIFW.cmake
index 141e842..8380977 100644
--- a/Modules/CPackIFW.cmake
+++ b/Modules/CPackIFW.cmake
@@ -518,7 +518,7 @@
     get_filename_component(${_ifw_script_macro} ${_ifw_script_file} ABSOLUTE)
     set(_ifw_script_file ${${_ifw_script_macro}})
     if(NOT EXISTS ${_ifw_script_file})
-      message(WARNING "CPack IFW: script file \"${_ifw_script_file}\" is not exists")
+      message(WARNING "CPack IFW: script file \"${_ifw_script_file}\" does not exist")
       set(${_ifw_script_macro})
     endif()
   endif()
diff --git a/Modules/Compiler/GNU-FindBinUtils.cmake b/Modules/Compiler/GNU-FindBinUtils.cmake
index 16b7bbd..097fbf3 100644
--- a/Modules/Compiler/GNU-FindBinUtils.cmake
+++ b/Modules/Compiler/GNU-FindBinUtils.cmake
@@ -18,7 +18,7 @@
 find_program(CMAKE_${_CMAKE_PROCESSING_LANGUAGE}_COMPILER_AR NAMES
     "${_CMAKE_TOOLCHAIN_PREFIX}gcc-ar-${__version_x_y}"
     "${_CMAKE_TOOLCHAIN_PREFIX}gcc-ar-${__version_x}"
-    "${_CMAKE_TOOLCHAIN_PREFIX}gcc-ar"
+    "${_CMAKE_TOOLCHAIN_PREFIX}gcc-ar${_CMAKE_COMPILER_SUFFIX}"
     HINTS ${__gcc_hints}
     DOC "A wrapper around 'ar' adding the appropriate '--plugin' option for the GCC compiler"
 )
@@ -28,7 +28,7 @@
 find_program(CMAKE_${_CMAKE_PROCESSING_LANGUAGE}_COMPILER_RANLIB NAMES
     "${_CMAKE_TOOLCHAIN_PREFIX}gcc-ranlib-${__version_x_y}"
     "${_CMAKE_TOOLCHAIN_PREFIX}gcc-ranlib-${__version_x}"
-    "${_CMAKE_TOOLCHAIN_PREFIX}gcc-ranlib"
+    "${_CMAKE_TOOLCHAIN_PREFIX}gcc-ranlib${_CMAKE_COMPILER_SUFFIX}"
     HINTS ${__gcc_hints}
     DOC "A wrapper around 'ranlib' adding the appropriate '--plugin' option for the GCC compiler"
 )
diff --git a/Modules/CompilerId/Xcode-3.pbxproj.in b/Modules/CompilerId/Xcode-3.pbxproj.in
index 813c074..672044e 100644
--- a/Modules/CompilerId/Xcode-3.pbxproj.in
+++ b/Modules/CompilerId/Xcode-3.pbxproj.in
@@ -86,6 +86,7 @@
 				SYMROOT = .;
 				@id_toolset@
 				@id_lang_version@
+				@id_clang_cxx_library@
 				@id_deployment_target@
 				@id_sdkroot@
 			};
diff --git a/Modules/FindCups.cmake b/Modules/FindCups.cmake
index 10ce229..27105b9 100644
--- a/Modules/FindCups.cmake
+++ b/Modules/FindCups.cmake
@@ -5,18 +5,38 @@
 FindCups
 --------
 
-Try to find the Cups printing system
+Find the CUPS printing system.
 
-Once done this will define
+Set CUPS_REQUIRE_IPP_DELETE_ATTRIBUTE to TRUE if you need a version which
+features this function (i.e. at least 1.1.19)
 
-::
+Imported targets
+^^^^^^^^^^^^^^^^
 
-  CUPS_FOUND - system has Cups
-  CUPS_INCLUDE_DIR - the Cups include directory
-  CUPS_LIBRARIES - Libraries needed to use Cups
-  CUPS_VERSION_STRING - version of Cups found (since CMake 2.8.8)
-  Set CUPS_REQUIRE_IPP_DELETE_ATTRIBUTE to TRUE if you need a version which
-  features this function (i.e. at least 1.1.19)
+This module defines :prop_tgt:`IMPORTED` target ``Cups::Cups``, if Cups has
+been found.
+
+Result variables
+^^^^^^^^^^^^^^^^
+
+This module will set the following variables in your project:
+
+``CUPS_FOUND``
+  true if CUPS headers and libraries were found
+``CUPS_INCLUDE_DIRS``
+  the directory containing the Cups headers
+``CUPS_LIBRARIES``
+  the libraries to link against to use CUPS.
+``CUPS_VERSION_STRING``
+  the version of CUPS found (since CMake 2.8.8)
+
+Cache variables
+^^^^^^^^^^^^^^^
+
+The following cache variables may also be set:
+
+``CUPS_INCLUDE_DIR``
+  the directory containing the Cups headers
 #]=======================================================================]
 
 find_path(CUPS_INCLUDE_DIR cups/cups.h )
@@ -66,3 +86,13 @@
 endif ()
 
 mark_as_advanced(CUPS_INCLUDE_DIR CUPS_LIBRARIES)
+
+if (CUPS_FOUND)
+    set(CUPS_INCLUDE_DIRS "${CUPS_INCLUDE_DIR}")
+    if (NOT TARGET Cups::Cups)
+        add_library(Cups::Cups INTERFACE IMPORTED)
+        set_target_properties(Cups::Cups PROPERTIES
+            INTERFACE_LINK_LIBRARIES      "${CUPS_LIBRARIES}"
+            INTERFACE_INCLUDE_DIRECTORIES "${CUPS_INCLUDE_DIR}")
+    endif ()
+endif ()
diff --git a/Modules/FindHDF5.cmake b/Modules/FindHDF5.cmake
index 2772b7d..70bfc96 100644
--- a/Modules/FindHDF5.cmake
+++ b/Modules/FindHDF5.cmake
@@ -8,7 +8,6 @@
 Find HDF5, a library for reading and writing self describing array data.
 
 
-
 This module invokes the HDF5 wrapper compiler that should be installed
 alongside HDF5.  Depending upon the HDF5 Configuration, the wrapper
 compiler is called either h5cc or h5pcc.  If this succeeds, the module
@@ -45,54 +44,75 @@
 tools that come with the HDF5 distribution that may be useful for
 regression testing.
 
-This module will define the following variables:
+Result Variables
+^^^^^^^^^^^^^^^^
 
-::
+This module will set the following variables in your project:
 
-  HDF5_FOUND - true if HDF5 was found on the system
-  HDF5_VERSION - HDF5 version in format Major.Minor.Release
-  HDF5_INCLUDE_DIRS - Location of the hdf5 includes
-  HDF5_INCLUDE_DIR - Location of the hdf5 includes (deprecated)
-  HDF5_DEFINITIONS - Required compiler definitions for HDF5
-  HDF5_LIBRARIES - Required libraries for all requested bindings
-  HDF5_HL_LIBRARIES - Required libraries for the HDF5 high level API for all
-                      bindings, if the HL component is enabled
+``HDF5_FOUND``
+  HDF5 was found on the system
+``HDF5_VERSION``
+  HDF5 library version
+``HDF5_INCLUDE_DIRS``
+  Location of the HDF5 header files
+``HDF5_DEFINITIONS``
+  Required compiler definitions for HDF5
+``HDF5_LIBRARIES``
+  Required libraries for all requested bindings
+``HDF5_HL_LIBRARIES``
+  Required libraries for the HDF5 high level API for all bindings,
+  if the ``HL`` component is enabled
 
-Available components are: C CXX Fortran and HL.  For each enabled language
-binding, a corresponding HDF5_${LANG}_LIBRARIES variable, and potentially
-HDF5_${LANG}_DEFINITIONS, will be defined.
-If the HL component is enabled, then an HDF5_${LANG}_HL_LIBRARIES will
+Available components are: ``C`` ``CXX`` ``Fortran`` and ``HL``.
+For each enabled language binding, a corresponding ``HDF5_${LANG}_LIBRARIES``
+variable, and potentially ``HDF5_${LANG}_DEFINITIONS``, will be defined.
+If the ``HL`` component is enabled, then an ``HDF5_${LANG}_HL_LIBRARIES`` will
 also be defined.  With all components enabled, the following variables will be defined:
 
-::
+``HDF5_C_DEFINITIONS``
+  Required compiler definitions for HDF5 C bindings
+``HDF5_CXX_DEFINITIONS``
+  Required compiler definitions for HDF5 C++ bindings
+``HDF5_Fortran_DEFINITIONS``
+  Required compiler definitions for HDF5 Fortran bindings
+``HDF5_C_INCLUDE_DIRS``
+  Required include directories for HDF5 C bindings
+``HDF5_CXX_INCLUDE_DIRS``
+  Required include directories for HDF5 C++ bindings
+``HDF5_Fortran_INCLUDE_DIRS``
+  Required include directories for HDF5 Fortran bindings
+``HDF5_C_LIBRARIES``
+  Required libraries for the HDF5 C bindings
+``HDF5_CXX_LIBRARIES``
+  Required libraries for the HDF5 C++ bindings
+``HDF5_Fortran_LIBRARIES``
+  Required libraries for the HDF5 Fortran bindings
+``HDF5_C_HL_LIBRARIES``
+  Required libraries for the high level C bindings
+``HDF5_CXX_HL_LIBRARIES``
+  Required libraries for the high level C++ bindings
+``HDF5_Fortran_HL_LIBRARIES``
+  Required libraries for the high level Fortran bindings.
 
-  HDF5_C_DEFINITIONS -- Required compiler definitions for HDF5 C bindings
-  HDF5_CXX_DEFINITIONS -- Required compiler definitions for HDF5 C++ bindings
-  HDF5_Fortran_DEFINITIONS -- Required compiler definitions for HDF5 Fortran bindings
-  HDF5_C_INCLUDE_DIRS -- Required include directories for HDF5 C bindings
-  HDF5_CXX_INCLUDE_DIRS -- Required include directories for HDF5 C++ bindings
-  HDF5_Fortran_INCLUDE_DIRS -- Required include directories for HDF5 Fortran bindings
-  HDF5_C_LIBRARIES - Required libraries for the HDF5 C bindings
-  HDF5_CXX_LIBRARIES - Required libraries for the HDF5 C++ bindings
-  HDF5_Fortran_LIBRARIES - Required libraries for the HDF5 Fortran bindings
-  HDF5_C_HL_LIBRARIES - Required libraries for the high level C bindings
-  HDF5_CXX_HL_LIBRARIES - Required libraries for the high level C++ bindings
-  HDF5_Fortran_HL_LIBRARIES - Required libraries for the high level Fortran
-                              bindings.
+``HDF5_IS_PARALLEL``
+  HDF5 library has parallel IO support
+``HDF5_C_COMPILER_EXECUTABLE``
+  path to the HDF5 C wrapper compiler
+``HDF5_CXX_COMPILER_EXECUTABLE``
+  path to the HDF5 C++ wrapper compiler
+``HDF5_Fortran_COMPILER_EXECUTABLE``
+  path to the HDF5 Fortran wrapper compiler
+``HDF5_C_COMPILER_EXECUTABLE_NO_INTERROGATE``
+  path to the primary C compiler which is also the HDF5 wrapper
+``HDF5_CXX_COMPILER_EXECUTABLE_NO_INTERROGATE``
+  path to the primary C++ compiler which is also the HDF5 wrapper
+``HDF5_Fortran_COMPILER_EXECUTABLE_NO_INTERROGATE``
+  path to the primary Fortran compiler which is also the HDF5 wrapper
+``HDF5_DIFF_EXECUTABLE``
+  path to the HDF5 dataset comparison tool
 
-  HDF5_IS_PARALLEL - Whether or not HDF5 was found with parallel IO support
-  HDF5_C_COMPILER_EXECUTABLE - the path to the HDF5 C wrapper compiler
-  HDF5_CXX_COMPILER_EXECUTABLE - the path to the HDF5 C++ wrapper compiler
-  HDF5_Fortran_COMPILER_EXECUTABLE - the path to the HDF5 Fortran wrapper compiler
-  HDF5_C_COMPILER_EXECUTABLE_NO_INTERROGATE - path to the primary C compiler
-                                              which is also the HDF5 wrapper
-  HDF5_CXX_COMPILER_EXECUTABLE_NO_INTERROGATE - path to the primary C++
-                                                compiler which is also
-                                                the HDF5 wrapper
-  HDF5_Fortran_COMPILER_EXECUTABLE_NO_INTERROGATE - path to the primary
-                                                    Fortran compiler which
-                                                    is also the HDF5 wrapper
-  HDF5_DIFF_EXECUTABLE - the path to the HDF5 dataset comparison tool
+Hints
+^^^^^
 
 The following variable can be set to guide the search for HDF5 libraries and includes:
 
@@ -100,10 +120,10 @@
   Specify the path to the HDF5 installation to use.
 
 ``HDF5_FIND_DEBUG``
-  Set to a true value to get some extra debugging output.
+  Set ``true`` to get extra debugging output.
 
 ``HDF5_NO_FIND_PACKAGE_CONFIG_FILE``
-  Set to a true value to skip trying to find ``hdf5-config.cmake``.
+  Set ``true`` to skip trying to find ``hdf5-config.cmake``.
 #]=======================================================================]
 
 # This module is maintained by Will Dicharry <wdicharry@stellarscience.com>.
@@ -322,20 +342,22 @@
     elseif("${language}" STREQUAL "Fortran")
         set(test_file ${scratch_dir}/cmake_hdf5_test.f90)
     endif()
-    exec_program( ${HDF5_${language}_COMPILER_EXECUTABLE}
-        ARGS -show ${lib_type_args} ${test_file}
-        OUTPUT_VARIABLE ${output}
-        RETURN_VALUE ${return_value}
-    )
+    execute_process(
+      COMMAND ${HDF5_${language}_COMPILER_EXECUTABLE} -show ${lib_type_args} ${test_file}
+      OUTPUT_VARIABLE ${output}
+      ERROR_VARIABLE ${output}
+      RESULT_VARIABLE ${return_value}
+      )
     if(NOT ${${return_value}} EQUAL 0)
         message(STATUS
           "Unable to determine HDF5 ${language} flags from HDF5 wrapper.")
     endif()
-    exec_program( ${HDF5_${language}_COMPILER_EXECUTABLE}
-        ARGS -showconfig
-        OUTPUT_VARIABLE config_output
-        RETURN_VALUE config_return
-    )
+    execute_process(
+      COMMAND ${HDF5_${language}_COMPILER_EXECUTABLE} -showconfig
+      OUTPUT_VARIABLE config_output
+      ERROR_VARIABLE config_output
+      RESULT_VARIABLE config_return
+      )
     if(NOT ${return_value} EQUAL 0)
         message( STATUS
           "Unable to determine HDF5 ${language} version from HDF5 wrapper.")
diff --git a/Source/CMakeVersion.cmake b/Source/CMakeVersion.cmake
index ef4318b..63d0f9a 100644
--- a/Source/CMakeVersion.cmake
+++ b/Source/CMakeVersion.cmake
@@ -1,5 +1,5 @@
 # CMake version number components.
 set(CMake_VERSION_MAJOR 3)
 set(CMake_VERSION_MINOR 14)
-set(CMake_VERSION_PATCH 20190206)
+set(CMake_VERSION_PATCH 20190208)
 #set(CMake_VERSION_RC 1)
diff --git a/Source/CPack/IFW/cmCPackIFWGenerator.cxx b/Source/CPack/IFW/cmCPackIFWGenerator.cxx
index 9102e3e..c1b6eea 100644
--- a/Source/CPack/IFW/cmCPackIFWGenerator.cxx
+++ b/Source/CPack/IFW/cmCPackIFWGenerator.cxx
@@ -85,8 +85,8 @@
     int retVal = 1;
     cmCPackIFWLogger(OUTPUT, "- Generate repository" << std::endl);
     bool res = cmSystemTools::RunSingleCommand(
-      ifwCmd.c_str(), &output, &output, &retVal, nullptr,
-      this->GeneratorVerbose, cmDuration::zero());
+      ifwCmd, &output, &output, &retVal, nullptr, this->GeneratorVerbose,
+      cmDuration::zero());
     if (!res || retVal) {
       cmGeneratedFileStream ofs(ifwTmpFile);
       ofs << "# Run command: " << ifwCmd << std::endl
@@ -198,8 +198,8 @@
     int retVal = 1;
     cmCPackIFWLogger(OUTPUT, "- Generate package" << std::endl);
     bool res = cmSystemTools::RunSingleCommand(
-      ifwCmd.c_str(), &output, &output, &retVal, nullptr,
-      this->GeneratorVerbose, cmDuration::zero());
+      ifwCmd, &output, &output, &retVal, nullptr, this->GeneratorVerbose,
+      cmDuration::zero());
     if (!res || retVal) {
       cmGeneratedFileStream ofs(ifwTmpFile);
       ofs << "# Run command: " << ifwCmd << std::endl
diff --git a/Source/CPack/OSXScriptLauncher.cxx b/Source/CPack/OSXScriptLauncher.cxx
index 4966d09..00d272c 100644
--- a/Source/CPack/OSXScriptLauncher.cxx
+++ b/Source/CPack/OSXScriptLauncher.cxx
@@ -73,7 +73,7 @@
   args.push_back(nullptr);
 
   cmsysProcess* cp = cmsysProcess_New();
-  cmsysProcess_SetCommand(cp, &*args.begin());
+  cmsysProcess_SetCommand(cp, args.data());
   cmsysProcess_SetWorkingDirectory(cp, scriptDirectory.c_str());
   cmsysProcess_SetOption(cp, cmsysProcess_Option_HideWindow, 1);
   cmsysProcess_SetTimeout(cp, 0);
diff --git a/Source/CPack/WiX/cmCPackWIXGenerator.cxx b/Source/CPack/WiX/cmCPackWIXGenerator.cxx
index 398ebd3..f522ce2 100644
--- a/Source/CPack/WiX/cmCPackWIXGenerator.cxx
+++ b/Source/CPack/WiX/cmCPackWIXGenerator.cxx
@@ -61,9 +61,8 @@
   std::string output;
 
   int returnValue = 0;
-  bool status = cmSystemTools::RunSingleCommand(command.c_str(), &output,
-                                                &output, &returnValue, 0,
-                                                cmSystemTools::OUTPUT_NONE);
+  bool status = cmSystemTools::RunSingleCommand(
+    command, &output, &output, &returnValue, 0, cmSystemTools::OUTPUT_NONE);
 
   cmsys::ofstream logFile(logFileName.c_str(), std::ios::app);
   logFile << command << std::endl;
diff --git a/Source/CPack/cmCPackDragNDropGenerator.cxx b/Source/CPack/cmCPackDragNDropGenerator.cxx
index 013ad81..7a3742b 100644
--- a/Source/CPack/cmCPackDragNDropGenerator.cxx
+++ b/Source/CPack/cmCPackDragNDropGenerator.cxx
@@ -244,8 +244,8 @@
   int exit_code = 1;
 
   bool result = cmSystemTools::RunSingleCommand(
-    command.str().c_str(), output, output, &exit_code, nullptr,
-    this->GeneratorVerbose, cmDuration::zero());
+    command.str(), output, output, &exit_code, nullptr, this->GeneratorVerbose,
+    cmDuration::zero());
 
   if (!result || exit_code) {
     cmCPackLogger(cmCPackLog::LOG_ERROR,
diff --git a/Source/CPack/cmCPackGenerator.cxx b/Source/CPack/cmCPackGenerator.cxx
index 57c0545..b4c05ab 100644
--- a/Source/CPack/cmCPackGenerator.cxx
+++ b/Source/CPack/cmCPackGenerator.cxx
@@ -278,7 +278,7 @@
       std::string output;
       int retVal = 1;
       bool resB = cmSystemTools::RunSingleCommand(
-        ic.c_str(), &output, &output, &retVal, nullptr, this->GeneratorVerbose,
+        ic, &output, &output, &retVal, nullptr, this->GeneratorVerbose,
         cmDuration::zero());
       if (!resB || retVal) {
         std::string tmpFile = this->GetOption("CPACK_TOPLEVEL_DIRECTORY");
@@ -647,8 +647,8 @@
     std::string output;
     int retVal = 1;
     bool resB = cmSystemTools::RunSingleCommand(
-      buildCommand.c_str(), &output, &output, &retVal,
-      installDirectory.c_str(), this->GeneratorVerbose, cmDuration::zero());
+      buildCommand, &output, &output, &retVal, installDirectory.c_str(),
+      this->GeneratorVerbose, cmDuration::zero());
     if (!resB || retVal) {
       std::string tmpFile = this->GetOption("CPACK_TOPLEVEL_DIRECTORY");
       tmpFile += "/PreinstallOutput.log";
diff --git a/Source/CPack/cmCPackNSISGenerator.cxx b/Source/CPack/cmCPackNSISGenerator.cxx
index 37ea66e..c77eebc 100644
--- a/Source/CPack/cmCPackNSISGenerator.cxx
+++ b/Source/CPack/cmCPackNSISGenerator.cxx
@@ -302,8 +302,8 @@
   std::string output;
   int retVal = 1;
   bool res = cmSystemTools::RunSingleCommand(
-    nsisCmd.c_str(), &output, &output, &retVal, nullptr,
-    this->GeneratorVerbose, cmDuration::zero());
+    nsisCmd, &output, &output, &retVal, nullptr, this->GeneratorVerbose,
+    cmDuration::zero());
   if (!res || retVal) {
     cmGeneratedFileStream ofs(tmpFile);
     ofs << "# Run command: " << nsisCmd << std::endl
@@ -407,8 +407,8 @@
   std::string output;
   int retVal = 1;
   bool resS = cmSystemTools::RunSingleCommand(
-    nsisCmd.c_str(), &output, &output, &retVal, nullptr,
-    this->GeneratorVerbose, cmDuration::zero());
+    nsisCmd, &output, &output, &retVal, nullptr, this->GeneratorVerbose,
+    cmDuration::zero());
   cmsys::RegularExpression versionRex("v([0-9]+.[0-9]+)");
   cmsys::RegularExpression versionRexCVS("v(.*)\\.cvs");
   if (!resS || retVal ||
@@ -749,7 +749,7 @@
     std::string output;
     int retVal = -1;
     int res = cmSystemTools::RunSingleCommand(
-      cmd.c_str(), &output, &output, &retVal, dirName.c_str(),
+      cmd, &output, &output, &retVal, dirName.c_str(),
       cmSystemTools::OUTPUT_NONE, cmDuration::zero());
     if (!res || retVal) {
       std::string tmpFile = this->GetOption("CPACK_TOPLEVEL_DIRECTORY");
diff --git a/Source/CPack/cmCPackOSXX11Generator.cxx b/Source/CPack/cmCPackOSXX11Generator.cxx
index 486633c..85248c6 100644
--- a/Source/CPack/cmCPackOSXX11Generator.cxx
+++ b/Source/CPack/cmCPackOSXX11Generator.cxx
@@ -155,8 +155,8 @@
   bool res = false;
   while (numTries > 0) {
     res = cmSystemTools::RunSingleCommand(
-      dmgCmd.str().c_str(), &output, &output, &retVal, nullptr,
-      this->GeneratorVerbose, cmDuration::zero());
+      dmgCmd.str(), &output, &output, &retVal, nullptr, this->GeneratorVerbose,
+      cmDuration::zero());
     if (res && !retVal) {
       numTries = -1;
       break;
diff --git a/Source/CPack/cmCPackPackageMakerGenerator.cxx b/Source/CPack/cmCPackPackageMakerGenerator.cxx
index 246178d..3d93c48 100644
--- a/Source/CPack/cmCPackPackageMakerGenerator.cxx
+++ b/Source/CPack/cmCPackPackageMakerGenerator.cxx
@@ -295,8 +295,8 @@
   bool res = false;
   while (numTries > 0) {
     res = cmSystemTools::RunSingleCommand(
-      dmgCmd.str().c_str(), &output, &output, &retVal, nullptr,
-      this->GeneratorVerbose, cmDuration::zero());
+      dmgCmd.str(), &output, &output, &retVal, nullptr, this->GeneratorVerbose,
+      cmDuration::zero());
     if (res && !retVal) {
       numTries = -1;
       break;
diff --git a/Source/CPack/cmCPackProductBuildGenerator.cxx b/Source/CPack/cmCPackProductBuildGenerator.cxx
index a556e0c..94b5b5f 100644
--- a/Source/CPack/cmCPackProductBuildGenerator.cxx
+++ b/Source/CPack/cmCPackProductBuildGenerator.cxx
@@ -145,8 +145,8 @@
   std::string output;
   int retVal = 1;
   bool res = cmSystemTools::RunSingleCommand(
-    command.c_str(), &output, &output, &retVal, nullptr,
-    this->GeneratorVerbose, cmDuration::zero());
+    command, &output, &output, &retVal, nullptr, this->GeneratorVerbose,
+    cmDuration::zero());
   cmCPackLogger(cmCPackLog::LOG_VERBOSE, "Done running command" << std::endl);
   if (!res || retVal) {
     cmGeneratedFileStream ofs(tmpFile);
diff --git a/Source/CTest/cmCTestBuildAndTestHandler.cxx b/Source/CTest/cmCTestBuildAndTestHandler.cxx
index 2fd4c7a..3856569 100644
--- a/Source/CTest/cmCTestBuildAndTestHandler.cxx
+++ b/Source/CTest/cmCTestBuildAndTestHandler.cxx
@@ -118,7 +118,7 @@
     : CM(cm)
   {
     cmSystemTools::SetMessageCallback(
-      [&s](const char* msg, const char* /*unused*/) {
+      [&s](const std::string& msg, const char* /*unused*/) {
         s += msg;
         s += "\n";
       });
diff --git a/Source/CTest/cmCTestBuildHandler.cxx b/Source/CTest/cmCTestBuildHandler.cxx
index d934c00..af664ba 100644
--- a/Source/CTest/cmCTestBuildHandler.cxx
+++ b/Source/CTest/cmCTestBuildHandler.cxx
@@ -800,7 +800,7 @@
 
   // Now create process object
   cmsysProcess* cp = cmsysProcess_New();
-  cmsysProcess_SetCommand(cp, &*argv.begin());
+  cmsysProcess_SetCommand(cp, argv.data());
   cmsysProcess_SetWorkingDirectory(cp, dir);
   cmsysProcess_SetOption(cp, cmsysProcess_Option_HideWindow, 1);
   cmsysProcess_SetTimeout(cp, timeout);
@@ -978,7 +978,7 @@
       this->CurrentProcessingLine.insert(this->CurrentProcessingLine.end(),
                                          queue->begin(), it);
       this->CurrentProcessingLine.push_back(0);
-      const char* line = &*this->CurrentProcessingLine.begin();
+      const char* line = this->CurrentProcessingLine.data();
 
       // Process the line
       int lineType = this->ProcessSingleLine(line);
diff --git a/Source/CTest/cmCTestCoverageHandler.cxx b/Source/CTest/cmCTestCoverageHandler.cxx
index 225383c..3b93422 100644
--- a/Source/CTest/cmCTestCoverageHandler.cxx
+++ b/Source/CTest/cmCTestCoverageHandler.cxx
@@ -72,7 +72,7 @@
       args.push_back(cl.c_str());
     }
     args.push_back(nullptr); // null terminate
-    cmsysProcess_SetCommand(this->Process, &*args.begin());
+    cmsysProcess_SetCommand(this->Process, args.data());
     if (!this->WorkingDirectory.empty()) {
       cmsysProcess_SetWorkingDirectory(this->Process,
                                        this->WorkingDirectory.c_str());
diff --git a/Source/CTest/cmCTestScriptHandler.cxx b/Source/CTest/cmCTestScriptHandler.cxx
index 33b8b4a..2cbdc4e 100644
--- a/Source/CTest/cmCTestScriptHandler.cxx
+++ b/Source/CTest/cmCTestScriptHandler.cxx
@@ -199,7 +199,7 @@
 
   // Now create process object
   cmsysProcess* cp = cmsysProcess_New();
-  cmsysProcess_SetCommand(cp, &*argv.begin());
+  cmsysProcess_SetCommand(cp, argv.data());
   // cmsysProcess_SetWorkingDirectory(cp, dir);
   cmsysProcess_SetOption(cp, cmsysProcess_Option_HideWindow, 1);
   // cmsysProcess_SetTimeout(cp, timeout);
@@ -607,9 +607,8 @@
     cmCTestLog(this->CTest, HANDLER_VERBOSE_OUTPUT,
                "Run cvs: " << this->CVSCheckOut << std::endl);
     res = cmSystemTools::RunSingleCommand(
-      this->CVSCheckOut.c_str(), &output, &output, &retVal,
-      this->CTestRoot.c_str(), this->HandlerVerbose,
-      cmDuration::zero() /*this->TimeOut*/);
+      this->CVSCheckOut, &output, &output, &retVal, this->CTestRoot.c_str(),
+      this->HandlerVerbose, cmDuration::zero() /*this->TimeOut*/);
     if (!res || retVal != 0) {
       cmSystemTools::Error("Unable to perform cvs checkout:\n",
                            output.c_str());
@@ -675,7 +674,7 @@
       cmCTestLog(this->CTest, HANDLER_VERBOSE_OUTPUT,
                  "Run Update: " << fullCommand << std::endl);
       res = cmSystemTools::RunSingleCommand(
-        fullCommand.c_str(), &output, &output, &retVal, cvsArgs[0].c_str(),
+        fullCommand, &output, &output, &retVal, cvsArgs[0].c_str(),
         this->HandlerVerbose, cmDuration::zero() /*this->TimeOut*/);
       if (!res || retVal != 0) {
         cmSystemTools::Error("Unable to perform extra updates:\n", eu.c_str(),
@@ -779,7 +778,7 @@
     cmCTestLog(this->CTest, HANDLER_VERBOSE_OUTPUT,
                "Run cmake command: " << command << std::endl);
     res = cmSystemTools::RunSingleCommand(
-      command.c_str(), &output, &output, &retVal, this->BinaryDir.c_str(),
+      command, &output, &output, &retVal, this->BinaryDir.c_str(),
       this->HandlerVerbose, cmDuration::zero() /*this->TimeOut*/);
 
     if (!this->CMOutFile.empty()) {
@@ -818,7 +817,7 @@
     cmCTestLog(this->CTest, HANDLER_VERBOSE_OUTPUT,
                "Run ctest command: " << command << std::endl);
     res = cmSystemTools::RunSingleCommand(
-      command.c_str(), &output, &output, &retVal, this->BinaryDir.c_str(),
+      command, &output, &output, &retVal, this->BinaryDir.c_str(),
       this->HandlerVerbose, cmDuration::zero() /*this->TimeOut*/);
 
     // did something critical fail in ctest
diff --git a/Source/CTest/cmCTestSubmitHandler.cxx b/Source/CTest/cmCTestSubmitHandler.cxx
index 87112da..1539635 100644
--- a/Source/CTest/cmCTestSubmitHandler.cxx
+++ b/Source/CTest/cmCTestSubmitHandler.cxx
@@ -343,7 +343,7 @@
       if (!chunk.empty()) {
         cmCTestOptionalLog(this->CTest, DEBUG,
                            "CURL output: ["
-                             << cmCTestLogWrite(&*chunk.begin(), chunk.size())
+                             << cmCTestLogWrite(chunk.data(), chunk.size())
                              << "]" << std::endl,
                            this->Quiet);
         this->ParseResponse(chunk);
@@ -352,7 +352,7 @@
         cmCTestOptionalLog(
           this->CTest, DEBUG,
           "CURL debug output: ["
-            << cmCTestLogWrite(&*chunkDebug.begin(), chunkDebug.size()) << "]"
+            << cmCTestLogWrite(chunkDebug.data(), chunkDebug.size()) << "]"
             << std::endl,
           this->Quiet);
       }
@@ -404,12 +404,11 @@
           res = ::curl_easy_perform(curl);
 
           if (!chunk.empty()) {
-            cmCTestOptionalLog(
-              this->CTest, DEBUG,
-              "CURL output: ["
-                << cmCTestLogWrite(&*chunk.begin(), chunk.size()) << "]"
-                << std::endl,
-              this->Quiet);
+            cmCTestOptionalLog(this->CTest, DEBUG,
+                               "CURL output: ["
+                                 << cmCTestLogWrite(chunk.data(), chunk.size())
+                                 << "]" << std::endl,
+                               this->Quiet);
             this->ParseResponse(chunk);
           }
 
@@ -433,11 +432,11 @@
         // avoid deref of begin for zero size array
         if (!chunk.empty()) {
           *this->LogFile << "   Curl output was: "
-                         << cmCTestLogWrite(&*chunk.begin(), chunk.size())
+                         << cmCTestLogWrite(chunk.data(), chunk.size())
                          << std::endl;
           cmCTestLog(this->CTest, ERROR_MESSAGE,
                      "CURL output: ["
-                       << cmCTestLogWrite(&*chunk.begin(), chunk.size()) << "]"
+                       << cmCTestLogWrite(chunk.data(), chunk.size()) << "]"
                        << std::endl);
         }
         ::curl_easy_cleanup(curl);
@@ -486,7 +485,7 @@
   if (this->HasWarnings || this->HasErrors) {
     cmCTestLog(this->CTest, HANDLER_OUTPUT,
                "   Server Response:\n"
-                 << cmCTestLogWrite(&*chunk.begin(), chunk.size()) << "\n");
+                 << cmCTestLogWrite(chunk.data(), chunk.size()) << "\n");
   }
 }
 
diff --git a/Source/CTest/cmCTestTestHandler.cxx b/Source/CTest/cmCTestTestHandler.cxx
index cf2652a..c9783e4 100644
--- a/Source/CTest/cmCTestTestHandler.cxx
+++ b/Source/CTest/cmCTestTestHandler.cxx
@@ -1486,7 +1486,7 @@
     int retVal = 0;
     cmCTestOptionalLog(this->CTest, HANDLER_VERBOSE_OUTPUT,
                        "Run command: " << it << std::endl, this->Quiet);
-    if (!cmSystemTools::RunSingleCommand(it.c_str(), nullptr, nullptr, &retVal,
+    if (!cmSystemTools::RunSingleCommand(it, nullptr, nullptr, &retVal,
                                          nullptr, cmSystemTools::OUTPUT_MERGE
                                          /*this->Verbose*/) ||
         retVal != 0) {
diff --git a/Source/CTest/cmProcess.cxx b/Source/CTest/cmProcess.cxx
index 70ef8df..c03d004 100644
--- a/Source/CTest/cmProcess.cxx
+++ b/Source/CTest/cmProcess.cxx
@@ -199,7 +199,7 @@
   for (size_type sz = this->size(); this->Last != sz; ++this->Last) {
     if ((*this)[this->Last] == '\n' || (*this)[this->Last] == '\0') {
       // Extract the range first..last as a line.
-      const char* text = &*this->begin() + this->First;
+      const char* text = this->data() + this->First;
       size_type length = this->Last - this->First;
       while (length && text[length - 1] == '\r') {
         length--;
@@ -229,7 +229,7 @@
 {
   // Return the partial last line, if any.
   if (!this->empty()) {
-    line.assign(&*this->begin(), this->size());
+    line.assign(this->data(), this->size());
     this->First = this->Last = 0;
     this->clear();
     return true;
diff --git a/Source/CursesDialog/ccmake.cxx b/Source/CursesDialog/ccmake.cxx
index f2982a6..745c6bb 100644
--- a/Source/CursesDialog/ccmake.cxx
+++ b/Source/CursesDialog/ccmake.cxx
@@ -150,7 +150,7 @@
   }
 
   cmSystemTools::SetMessageCallback(
-    [myform](const char* message, const char* title) {
+    [myform](const std::string& message, const char* title) {
       myform->AddError(message, title);
     });
 
diff --git a/Source/CursesDialog/cmCursesForm.h b/Source/CursesDialog/cmCursesForm.h
index ddb67de..7842905 100644
--- a/Source/CursesDialog/cmCursesForm.h
+++ b/Source/CursesDialog/cmCursesForm.h
@@ -9,6 +9,8 @@
 
 #include "cmsys/FStream.hxx"
 
+#include <string>
+
 class cmCursesForm
 {
 public:
@@ -34,7 +36,7 @@
   // Description:
   // During a CMake run, an error handle should add errors
   // to be displayed afterwards.
-  virtual void AddError(const char*, const char*) {}
+  virtual void AddError(const std::string&, const char*) {}
 
   // Description:
   // Turn debugging on. This will create ccmakelog.txt.
diff --git a/Source/CursesDialog/cmCursesMainForm.cxx b/Source/CursesDialog/cmCursesMainForm.cxx
index 8ca7802..f6a1a57 100644
--- a/Source/CursesDialog/cmCursesMainForm.cxx
+++ b/Source/CursesDialog/cmCursesMainForm.cxx
@@ -647,7 +647,8 @@
   return 0;
 }
 
-void cmCursesMainForm::AddError(const char* message, const char* /*unused*/)
+void cmCursesMainForm::AddError(const std::string& message,
+                                const char* /*unused*/)
 {
   this->Errors.emplace_back(message);
 }
diff --git a/Source/CursesDialog/cmCursesMainForm.h b/Source/CursesDialog/cmCursesMainForm.h
index cc6482f..c09ce2a 100644
--- a/Source/CursesDialog/cmCursesMainForm.h
+++ b/Source/CursesDialog/cmCursesMainForm.h
@@ -81,7 +81,7 @@
    * During a CMake run, an error handle should add errors
    * to be displayed afterwards.
    */
-  void AddError(const char* message, const char* title) override;
+  void AddError(const std::string& message, const char* title) override;
 
   /**
    * Used to do a configure. If argument is specified, it does only the check
diff --git a/Source/QtDialog/QCMake.cxx b/Source/QtDialog/QCMake.cxx
index a073c30..6442d05 100644
--- a/Source/QtDialog/QCMake.cxx
+++ b/Source/QtDialog/QCMake.cxx
@@ -25,7 +25,7 @@
   cmSystemTools::SetRunCommandHideConsole(true);
 
   cmSystemTools::SetMessageCallback(
-    [this](const char* msg, const char* title) {
+    [this](std::string const& msg, const char* title) {
       this->messageCallback(msg, title);
     });
   cmSystemTools::SetStdoutCallback(
@@ -359,9 +359,9 @@
   QCoreApplication::processEvents();
 }
 
-void QCMake::messageCallback(const char* msg, const char* /*title*/)
+void QCMake::messageCallback(std::string const& msg, const char* /*title*/)
 {
-  emit this->errorMessage(QString::fromLocal8Bit(msg));
+  emit this->errorMessage(QString::fromStdString(msg));
   QCoreApplication::processEvents();
 }
 
diff --git a/Source/QtDialog/QCMake.h b/Source/QtDialog/QCMake.h
index ef4d2a1..8492606 100644
--- a/Source/QtDialog/QCMake.h
+++ b/Source/QtDialog/QCMake.h
@@ -169,7 +169,7 @@
 
   bool interruptCallback();
   void progressCallback(const char* msg, float percent);
-  void messageCallback(const char* msg, const char* title);
+  void messageCallback(std::string const& msg, const char* title);
   void stdoutCallback(std::string const& msg);
   void stderrCallback(std::string const& msg);
 
diff --git a/Source/cmCTest.cxx b/Source/cmCTest.cxx
index 989c7ee..ba2fe6c 100644
--- a/Source/cmCTest.cxx
+++ b/Source/cmCTest.cxx
@@ -1039,7 +1039,7 @@
 
   // Now create process object
   cmsysProcess* cp = cmsysProcess_New();
-  cmsysProcess_SetCommand(cp, &*argv.begin());
+  cmsysProcess_SetCommand(cp, argv.data());
   cmsysProcess_SetWorkingDirectory(cp, dir);
   cmsysProcess_SetOption(cp, cmsysProcess_Option_HideWindow, 1);
   cmsysProcess_SetTimeout(cp, timeout.count());
@@ -1222,7 +1222,7 @@
   }
 
   cmsysProcess* cp = cmsysProcess_New();
-  cmsysProcess_SetCommand(cp, &*argv.begin());
+  cmsysProcess_SetCommand(cp, argv.data());
   cmCTestLog(this, DEBUG, "Command is: " << argv[0] << std::endl);
   if (cmSystemTools::GetRunCommandHideConsole()) {
     cmsysProcess_SetOption(cp, cmsysProcess_Option_HideWindow, 1);
@@ -1258,7 +1258,7 @@
   cmsysProcess_WaitForExit(cp, nullptr);
   processOutput.DecodeText(tempOutput, tempOutput);
   if (output && tempOutput.begin() != tempOutput.end()) {
-    output->append(&*tempOutput.begin(), tempOutput.size());
+    output->append(tempOutput.data(), tempOutput.size());
   }
   cmCTestLog(this, HANDLER_VERBOSE_OUTPUT,
              "-- Process completed" << std::endl);
@@ -2776,7 +2776,7 @@
   stdErr->clear();
 
   cmsysProcess* cp = cmsysProcess_New();
-  cmsysProcess_SetCommand(cp, &*argv.begin());
+  cmsysProcess_SetCommand(cp, argv.data());
   cmsysProcess_SetWorkingDirectory(cp, dir);
   if (cmSystemTools::GetRunCommandHideConsole()) {
     cmsysProcess_SetOption(cp, cmsysProcess_Option_HideWindow, 1);
@@ -2820,11 +2820,11 @@
   cmsysProcess_WaitForExit(cp, nullptr);
   if (!tempOutput.empty()) {
     processOutput.DecodeText(tempOutput, tempOutput);
-    stdOut->append(&*tempOutput.begin(), tempOutput.size());
+    stdOut->append(tempOutput.data(), tempOutput.size());
   }
   if (!tempError.empty()) {
     processOutput.DecodeText(tempError, tempError);
-    stdErr->append(&*tempError.begin(), tempError.size());
+    stdErr->append(tempError.data(), tempError.size());
   }
 
   bool result = true;
@@ -3048,7 +3048,7 @@
 {
   std::string test_outputs("\n*** Test Failed:\n");
   if (!process_output.empty()) {
-    test_outputs.append(&*process_output.begin(), process_output.size());
+    test_outputs.append(process_output.data(), process_output.size());
   }
   cmCTestLog(this, HANDLER_OUTPUT, test_outputs << std::endl << std::flush);
 }
diff --git a/Source/cmConditionEvaluator.cxx b/Source/cmConditionEvaluator.cxx
index 94ea529..303b147 100644
--- a/Source/cmConditionEvaluator.cxx
+++ b/Source/cmConditionEvaluator.cxx
@@ -130,8 +130,8 @@
     return false;
   }
 
-  return this->GetBooleanValueWithAutoDereference(*(newArgs.begin()),
-                                                  errorString, status, true);
+  return this->GetBooleanValueWithAutoDereference(newArgs.front(), errorString,
+                                                  status, true);
 }
 
 //=========================================================================
diff --git a/Source/cmExecuteProcessCommand.cxx b/Source/cmExecuteProcessCommand.cxx
index 8c67cdb..03eac5b 100644
--- a/Source/cmExecuteProcessCommand.cxx
+++ b/Source/cmExecuteProcessCommand.cxx
@@ -193,7 +193,7 @@
 
   // Set the command sequence.
   for (auto const& cmd : cmds) {
-    cmsysProcess_AddCommand(cp, &*cmd.begin());
+    cmsysProcess_AddCommand(cp, cmd.data());
   }
 
   // Set the process working directory.
@@ -286,10 +286,10 @@
 
   // Store the output obtained.
   if (!output_variable.empty() && !tempOutput.empty()) {
-    this->Makefile->AddDefinition(output_variable, &*tempOutput.begin());
+    this->Makefile->AddDefinition(output_variable, tempOutput.data());
   }
   if (!merge_output && !error_variable.empty() && !tempError.empty()) {
-    this->Makefile->AddDefinition(error_variable, &*tempError.begin());
+    this->Makefile->AddDefinition(error_variable, tempError.data());
   }
 
   // Store the result of running the process.
diff --git a/Source/cmExtraCodeBlocksGenerator.cxx b/Source/cmExtraCodeBlocksGenerator.cxx
index e408de3..d9ae4eb 100644
--- a/Source/cmExtraCodeBlocksGenerator.cxx
+++ b/Source/cmExtraCodeBlocksGenerator.cxx
@@ -247,8 +247,8 @@
 
   // figure out the compiler
   std::string compiler = this->GetCBCompilerId(mf);
-  std::string make = mf->GetRequiredDefinition("CMAKE_MAKE_PROGRAM");
-  const std::string makeArgs =
+  const std::string& make = mf->GetRequiredDefinition("CMAKE_MAKE_PROGRAM");
+  const std::string& makeArgs =
     mf->GetSafeDefinition("CMAKE_CODEBLOCKS_MAKE_ARGUMENTS");
 
   cmXMLWriter xml(fout);
diff --git a/Source/cmExtraCodeLiteGenerator.cxx b/Source/cmExtraCodeLiteGenerator.cxx
index 0773edc..6fe8c14 100644
--- a/Source/cmExtraCodeLiteGenerator.cxx
+++ b/Source/cmExtraCodeLiteGenerator.cxx
@@ -628,8 +628,8 @@
 std::string cmExtraCodeLiteGenerator::GetBuildCommand(
   const cmMakefile* mf, const std::string& targetName) const
 {
-  std::string generator = mf->GetSafeDefinition("CMAKE_GENERATOR");
-  std::string make = mf->GetRequiredDefinition("CMAKE_MAKE_PROGRAM");
+  const std::string& generator = mf->GetSafeDefinition("CMAKE_GENERATOR");
+  const std::string& make = mf->GetRequiredDefinition("CMAKE_MAKE_PROGRAM");
   std::string buildCommand = make; // Default
   std::ostringstream ss;
   if (generator == "NMake Makefiles" || generator == "Ninja") {
@@ -669,8 +669,8 @@
   const cmMakefile* mf) const
 {
   std::string buildCommand;
-  std::string make = mf->GetRequiredDefinition("CMAKE_MAKE_PROGRAM");
-  std::string generator = mf->GetSafeDefinition("CMAKE_GENERATOR");
+  const std::string& make = mf->GetRequiredDefinition("CMAKE_MAKE_PROGRAM");
+  const std::string& generator = mf->GetSafeDefinition("CMAKE_GENERATOR");
   if (generator == "Unix Makefiles" || generator == "MinGW Makefiles") {
     std::ostringstream ss;
 #if defined(_WIN32)
diff --git a/Source/cmExtraEclipseCDT4Generator.cxx b/Source/cmExtraEclipseCDT4Generator.cxx
index 30067b7..a6ce8b7 100644
--- a/Source/cmExtraEclipseCDT4Generator.cxx
+++ b/Source/cmExtraEclipseCDT4Generator.cxx
@@ -878,8 +878,8 @@
   xml.Attribute("moduleId", "org.eclipse.cdt.make.core.buildtargets");
   xml.StartElement("buildTargets");
   emmited.clear();
-  const std::string make = mf->GetRequiredDefinition("CMAKE_MAKE_PROGRAM");
-  const std::string makeArgs =
+  const std::string& make = mf->GetRequiredDefinition("CMAKE_MAKE_PROGRAM");
+  const std::string& makeArgs =
     mf->GetSafeDefinition("CMAKE_ECLIPSE_MAKE_ARGUMENTS");
 
   cmGlobalGenerator* generator =
@@ -1074,7 +1074,8 @@
   cmXMLWriter& xml, const cmMakefile& makefile)
 {
   // we need the "make" and the C (or C++) compiler which are used, Alex
-  std::string make = makefile.GetRequiredDefinition("CMAKE_MAKE_PROGRAM");
+  const std::string& make =
+    makefile.GetRequiredDefinition("CMAKE_MAKE_PROGRAM");
   std::string compiler = makefile.GetSafeDefinition("CMAKE_C_COMPILER");
   std::string arg1 = makefile.GetSafeDefinition("CMAKE_C_COMPILER_ARG1");
   if (compiler.empty()) {
diff --git a/Source/cmExtraKateGenerator.cxx b/Source/cmExtraKateGenerator.cxx
index 23ba6b7..76de75d 100644
--- a/Source/cmExtraKateGenerator.cxx
+++ b/Source/cmExtraKateGenerator.cxx
@@ -75,8 +75,8 @@
                                         cmGeneratedFileStream& fout) const
 {
   cmMakefile const* mf = lg->GetMakefile();
-  const std::string make = mf->GetRequiredDefinition("CMAKE_MAKE_PROGRAM");
-  const std::string makeArgs =
+  const std::string& make = mf->GetRequiredDefinition("CMAKE_MAKE_PROGRAM");
+  const std::string& makeArgs =
     mf->GetSafeDefinition("CMAKE_KATE_MAKE_ARGUMENTS");
   std::string const& homeOutputDir = lg->GetBinaryDirectory();
 
diff --git a/Source/cmExtraSublimeTextGenerator.cxx b/Source/cmExtraSublimeTextGenerator.cxx
index 739a177..59cfdca 100644
--- a/Source/cmExtraSublimeTextGenerator.cxx
+++ b/Source/cmExtraSublimeTextGenerator.cxx
@@ -168,7 +168,7 @@
   const std::vector<cmLocalGenerator*>& lgs, const cmMakefile* mf,
   cmGeneratedFileStream& fout, MapSourceFileFlags& sourceFileFlags)
 {
-  std::string make = mf->GetRequiredDefinition("CMAKE_MAKE_PROGRAM");
+  const std::string& make = mf->GetRequiredDefinition("CMAKE_MAKE_PROGRAM");
   std::string compiler;
   if (!lgs.empty()) {
     this->AppendTarget(fout, "all", lgs[0], nullptr, make.c_str(), mf,
diff --git a/Source/cmFileCommand.cxx b/Source/cmFileCommand.cxx
index 0f911c1..2fe0d63 100644
--- a/Source/cmFileCommand.cxx
+++ b/Source/cmFileCommand.cxx
@@ -3067,7 +3067,7 @@
 
   if (!logVar.empty()) {
     chunkDebug.push_back(0);
-    this->Makefile->AddDefinition(logVar, &*chunkDebug.begin());
+    this->Makefile->AddDefinition(logVar, chunkDebug.data());
   }
 
   return true;
@@ -3326,14 +3326,14 @@
     if (!chunkResponse.empty()) {
       chunkResponse.push_back(0);
       log += "Response:\n";
-      log += &*chunkResponse.begin();
+      log += chunkResponse.data();
       log += "\n";
     }
 
     if (!chunkDebug.empty()) {
       chunkDebug.push_back(0);
       log += "Debug:\n";
-      log += &*chunkDebug.begin();
+      log += chunkDebug.data();
       log += "\n";
     }
 
diff --git a/Source/cmFilePathChecksum.cxx b/Source/cmFilePathChecksum.cxx
index 2cffa7c..47a223a 100644
--- a/Source/cmFilePathChecksum.cxx
+++ b/Source/cmFilePathChecksum.cxx
@@ -74,7 +74,7 @@
     cmCryptoHash(cmCryptoHash::AlgoSHA256).ByteHashString(relSeed + relPath);
 
   // Convert binary checksum to string
-  return cmBase32Encoder().encodeString(&hashBytes.front(), hashBytes.size(),
+  return cmBase32Encoder().encodeString(hashBytes.data(), hashBytes.size(),
                                         false);
 }
 
diff --git a/Source/cmFindCommon.cxx b/Source/cmFindCommon.cxx
index 78be64e..9aaa000 100644
--- a/Source/cmFindCommon.cxx
+++ b/Source/cmFindCommon.cxx
@@ -310,7 +310,7 @@
 
 void AddTrailingSlash(std::string& s)
 {
-  if (!s.empty() && *s.rbegin() != '/') {
+  if (!s.empty() && s.back() != '/') {
     s += '/';
   }
 }
diff --git a/Source/cmFindPackageCommand.cxx b/Source/cmFindPackageCommand.cxx
index c2e0712..93c71a1 100644
--- a/Source/cmFindPackageCommand.cxx
+++ b/Source/cmFindPackageCommand.cxx
@@ -466,7 +466,7 @@
     // Allocate a PACKAGE_ROOT_PATH for the current find_package call.
     this->Makefile->FindPackageRootPathStack.emplace_back();
     std::vector<std::string>& rootPaths =
-      *this->Makefile->FindPackageRootPathStack.rbegin();
+      this->Makefile->FindPackageRootPathStack.back();
 
     // Add root paths from <PackageName>_ROOT CMake and environment variables,
     // subject to CMP0074.
diff --git a/Source/cmGeneratorExpressionNode.cxx b/Source/cmGeneratorExpressionNode.cxx
index aac188e..e8cb151 100644
--- a/Source/cmGeneratorExpressionNode.cxx
+++ b/Source/cmGeneratorExpressionNode.cxx
@@ -135,13 +135,13 @@
     const GeneratorExpressionContent* content,
     cmGeneratorExpressionDAGChecker* /*dagChecker*/) const override
   {
-    if (*parameters.begin() != "0" && *parameters.begin() != "1") {
+    if (parameters.front() != "0" && parameters.front() != "1") {
       reportError(
         context, content->GetOriginalExpression(),
         "$<NOT> parameter must resolve to exactly one '0' or '1' value.");
       return std::string();
     }
-    return *parameters.begin() == "0" ? "1" : "0";
+    return parameters.front() == "0" ? "1" : "0";
   }
 } notNode;
 
@@ -157,7 +157,7 @@
     const GeneratorExpressionContent* /*content*/,
     cmGeneratorExpressionDAGChecker* /*dagChecker*/) const override
   {
-    return !cmSystemTools::IsOff(*parameters.begin()) ? "1" : "0";
+    return !cmSystemTools::IsOff(parameters.front()) ? "1" : "0";
   }
 } boolNode;
 
@@ -194,7 +194,7 @@
     const GeneratorExpressionContent* /*content*/,
     cmGeneratorExpressionDAGChecker* /*dagChecker*/) const override
   {
-    return *parameters.begin() == parameters[1] ? "1" : "0";
+    return parameters.front() == parameters[1] ? "1" : "0";
   }
 } strEqualNode;
 
@@ -613,7 +613,7 @@
       return compilerId;
     }
     static cmsys::RegularExpression compilerIdValidator("^[A-Za-z0-9_]*$");
-    if (!compilerIdValidator.find(*parameters.begin())) {
+    if (!compilerIdValidator.find(parameters.front())) {
       reportError(context, content->GetOriginalExpression(),
                   "Expression syntax not recognized.");
       return std::string();
@@ -622,11 +622,11 @@
       return parameters.front().empty() ? "1" : "0";
     }
 
-    if (strcmp(parameters.begin()->c_str(), compilerId.c_str()) == 0) {
+    if (strcmp(parameters.front().c_str(), compilerId.c_str()) == 0) {
       return "1";
     }
 
-    if (cmsysString_strcasecmp(parameters.begin()->c_str(),
+    if (cmsysString_strcasecmp(parameters.front().c_str(),
                                compilerId.c_str()) == 0) {
       switch (context->LG->GetPolicyStatus(cmPolicies::CMP0044)) {
         case cmPolicies::WARN: {
@@ -734,7 +734,7 @@
     }
 
     static cmsys::RegularExpression compilerIdValidator("^[0-9\\.]*$");
-    if (!compilerIdValidator.find(*parameters.begin())) {
+    if (!compilerIdValidator.find(parameters.front())) {
       reportError(context, content->GetOriginalExpression(),
                   "Expression syntax not recognized.");
       return std::string();
@@ -744,7 +744,7 @@
     }
 
     return cmSystemTools::VersionCompare(cmSystemTools::OP_EQUAL,
-                                         parameters.begin()->c_str(),
+                                         parameters.front().c_str(),
                                          compilerVersion.c_str())
       ? "1"
       : "0";
@@ -839,7 +839,7 @@
       return parameters.front().empty() ? "1" : "0";
     }
 
-    if (*parameters.begin() == platformId) {
+    if (parameters.front() == platformId) {
       return "1";
     }
     return "0";
@@ -1001,7 +1001,7 @@
       return configurationNode.Evaluate(parameters, context, content, nullptr);
     }
     static cmsys::RegularExpression configValidator("^[A-Za-z0-9_]*$");
-    if (!configValidator.find(*parameters.begin())) {
+    if (!configValidator.find(parameters.front())) {
       reportError(context, content->GetOriginalExpression(),
                   "Expression syntax not recognized.");
       return std::string();
@@ -1011,7 +1011,7 @@
       return parameters.front().empty() ? "1" : "0";
     }
 
-    if (cmsysString_strcasecmp(parameters.begin()->c_str(),
+    if (cmsysString_strcasecmp(parameters.front().c_str(),
                                context->Config.c_str()) == 0) {
       return "1";
     }
@@ -1166,7 +1166,7 @@
     static cmsys::RegularExpression propertyNameValidator("^[A-Za-z0-9_]+$");
 
     cmGeneratorTarget const* target = context->HeadTarget;
-    std::string propertyName = *parameters.begin();
+    std::string propertyName = parameters.front();
 
     if (parameters.size() == 1) {
       context->HadHeadSensitiveCondition = true;
@@ -1182,14 +1182,14 @@
     }
 
     if (parameters.size() == 2) {
-      if (parameters.begin()->empty() && parameters[1].empty()) {
+      if (parameters.front().empty() && parameters[1].empty()) {
         reportError(
           context, content->GetOriginalExpression(),
           "$<TARGET_PROPERTY:tgt,prop> expression requires a non-empty "
           "target name and property name.");
         return std::string();
       }
-      if (parameters.begin()->empty()) {
+      if (parameters.front().empty()) {
         reportError(
           context, content->GetOriginalExpression(),
           "$<TARGET_PROPERTY:tgt,prop> expression requires a non-empty "
@@ -1964,7 +1964,7 @@
     cmGeneratorExpressionDAGChecker* dagChecker) const override
   {
     // Lookup the referenced target.
-    std::string name = *parameters.begin();
+    std::string name = parameters.front();
 
     if (!cmGeneratorExpression::IsValidTargetName(name)) {
       ::reportError(context, content->GetOriginalExpression(),
diff --git a/Source/cmGeneratorExpressionParser.cxx b/Source/cmGeneratorExpressionParser.cxx
index 949a86d..7aa3314 100644
--- a/Source/cmGeneratorExpressionParser.cxx
+++ b/Source/cmGeneratorExpressionParser.cxx
@@ -47,11 +47,11 @@
   if (!result.empty() &&
       (*(result.end() - 1))->GetType() ==
         cmGeneratorExpressionEvaluator::Text &&
-      (*contents.begin())->GetType() == cmGeneratorExpressionEvaluator::Text) {
+      contents.front()->GetType() == cmGeneratorExpressionEvaluator::Text) {
     TextContent* textContent = static_cast<TextContent*>(*(result.end() - 1));
     textContent->Extend(
-      static_cast<TextContent*>(*contents.begin())->GetLength());
-    delete *contents.begin();
+      static_cast<TextContent*>(contents.front())->GetLength());
+    delete contents.front();
     result.insert(result.end(), contents.begin() + 1, contents.end());
   } else {
     result.insert(result.end(), contents.begin(), contents.end());
diff --git a/Source/cmGeneratorTarget.cxx b/Source/cmGeneratorTarget.cxx
index 78040c3..54cfd3a 100644
--- a/Source/cmGeneratorTarget.cxx
+++ b/Source/cmGeneratorTarget.cxx
@@ -2389,7 +2389,7 @@
   std::set<cmGeneratorTarget*> targets;
 
   for (cmCustomCommandLine const& cCmdLine : cc.GetCommandLines()) {
-    std::string const& command = *cCmdLine.begin();
+    std::string const& command = cCmdLine.front();
     // Check for a target with this name.
     if (cmGeneratorTarget* t =
           this->LocalGenerator->FindGeneratorTargetToUse(command)) {
diff --git a/Source/cmGlobalGenerator.cxx b/Source/cmGlobalGenerator.cxx
index 386a3f7..50d361e 100644
--- a/Source/cmGlobalGenerator.cxx
+++ b/Source/cmGlobalGenerator.cxx
@@ -680,8 +680,9 @@
         std::string compilerEnv = "CMAKE_";
         compilerEnv += lang;
         compilerEnv += "_COMPILER_ENV_VAR";
-        std::string envVar = mf->GetRequiredDefinition(compilerEnv);
-        std::string envVarValue = mf->GetRequiredDefinition(compilerName);
+        const std::string& envVar = mf->GetRequiredDefinition(compilerEnv);
+        const std::string& envVarValue =
+          mf->GetRequiredDefinition(compilerName);
         std::string env = envVar;
         env += "=";
         env += envVarValue;
diff --git a/Source/cmGlobalMSYSMakefileGenerator.cxx b/Source/cmGlobalMSYSMakefileGenerator.cxx
index 3c24556..606febe 100644
--- a/Source/cmGlobalMSYSMakefileGenerator.cxx
+++ b/Source/cmGlobalMSYSMakefileGenerator.cxx
@@ -45,7 +45,8 @@
   std::vector<std::string> const& l, cmMakefile* mf, bool optional)
 {
   this->FindMakeProgram(mf);
-  std::string makeProgram = mf->GetRequiredDefinition("CMAKE_MAKE_PROGRAM");
+  const std::string& makeProgram =
+    mf->GetRequiredDefinition("CMAKE_MAKE_PROGRAM");
   std::vector<std::string> locations;
   std::string makeloc = cmSystemTools::GetProgramPath(makeProgram.c_str());
   locations.push_back(this->FindMinGW(makeloc));
diff --git a/Source/cmGlobalMinGWMakefileGenerator.cxx b/Source/cmGlobalMinGWMakefileGenerator.cxx
index c6d46e9..e218b4b 100644
--- a/Source/cmGlobalMinGWMakefileGenerator.cxx
+++ b/Source/cmGlobalMinGWMakefileGenerator.cxx
@@ -23,7 +23,8 @@
   std::vector<std::string> const& l, cmMakefile* mf, bool optional)
 {
   this->FindMakeProgram(mf);
-  std::string makeProgram = mf->GetRequiredDefinition("CMAKE_MAKE_PROGRAM");
+  const std::string& makeProgram =
+    mf->GetRequiredDefinition("CMAKE_MAKE_PROGRAM");
   std::vector<std::string> locations;
   locations.push_back(cmSystemTools::GetProgramPath(makeProgram));
   locations.push_back("/mingw/bin");
diff --git a/Source/cmGlobalVisualStudio10Generator.cxx b/Source/cmGlobalVisualStudio10Generator.cxx
index 07656ed..d8b2e89 100644
--- a/Source/cmGlobalVisualStudio10Generator.cxx
+++ b/Source/cmGlobalVisualStudio10Generator.cxx
@@ -1136,6 +1136,8 @@
           value |= cmIDEFlagTable::CaseInsensitive;
         } else if (s == "SpaceAppendable") {
           value |= cmIDEFlagTable::SpaceAppendable;
+        } else if (s == "CommaAppendable") {
+          value |= cmIDEFlagTable::CommaAppendable;
         }
       }
     }
diff --git a/Source/cmGlobalXCodeGenerator.cxx b/Source/cmGlobalXCodeGenerator.cxx
index 16f8a0e..51c001e 100644
--- a/Source/cmGlobalXCodeGenerator.cxx
+++ b/Source/cmGlobalXCodeGenerator.cxx
@@ -2254,6 +2254,22 @@
     debugStr = "NO";
   }
 
+  // extract C++ stdlib
+  for (auto const& language : languages) {
+    if (language != "CXX") {
+      continue;
+    }
+    std::string& flags = cflags[language];
+
+    auto stdlib =
+      this->ExtractFlagRegex("(^| )(-stdlib=[^ ]+)( |$)", 2, flags);
+    if (stdlib.size() > 8) {
+      const auto cxxLibrary = stdlib.substr(8);
+      buildSettings->AddAttribute("CLANG_CXX_LIBRARY",
+                                  this->CreateString(cxxLibrary));
+    }
+  }
+
   buildSettings->AddAttribute("COMBINE_HIDPI_IMAGES",
                               this->CreateString("YES"));
   buildSettings->AddAttribute("GCC_GENERATE_DEBUGGING_SYMBOLS",
diff --git a/Source/cmIDEFlagTable.h b/Source/cmIDEFlagTable.h
index 28d5d53..ff93432 100644
--- a/Source/cmIDEFlagTable.h
+++ b/Source/cmIDEFlagTable.h
@@ -29,6 +29,9 @@
     SpaceAppendable = (1 << 7),     // a flag that if specified multiple times
                                     // should have its value appended to the
                                     // old value with spaces
+    CommaAppendable = (1 << 8),     // a flag that if specified multiple times
+                                    // should have its value appended to the
+                                    // old value with commas (e.g. C# /nowarn
 
     UserValueIgnored = UserValue | UserIgnored,
     UserValueRequired = UserValue | UserRequired
diff --git a/Source/cmIDEOptions.cxx b/Source/cmIDEOptions.cxx
index ee0c782..ea67d45 100644
--- a/Source/cmIDEOptions.cxx
+++ b/Source/cmIDEOptions.cxx
@@ -148,6 +148,8 @@
     this->FlagMap[entry->IDEName].push_back(new_value);
   } else if (entry->special & cmIDEFlagTable::SpaceAppendable) {
     this->FlagMap[entry->IDEName].append_with_space(new_value);
+  } else if (entry->special & cmIDEFlagTable::CommaAppendable) {
+    this->FlagMap[entry->IDEName].append_with_comma(new_value);
   } else {
     // Use the user-specified value.
     this->FlagMap[entry->IDEName] = new_value;
diff --git a/Source/cmIDEOptions.h b/Source/cmIDEOptions.h
index a4e5757..4a43073 100644
--- a/Source/cmIDEOptions.h
+++ b/Source/cmIDEOptions.h
@@ -65,12 +65,22 @@
       this->derived::operator=(r);
       return *this;
     }
+    FlagValue& append_with_comma(std::string const& r)
+    {
+      return append_with_separator(r, ',');
+    }
     FlagValue& append_with_space(std::string const& r)
     {
+      return append_with_separator(r, ' ');
+    }
+
+  private:
+    FlagValue& append_with_separator(std::string const& r, char separator)
+    {
       this->resize(1);
       std::string& l = this->operator[](0);
       if (!l.empty()) {
-        l += " ";
+        l += separator;
       }
       l += r;
       return *this;
diff --git a/Source/cmInstallTargetGenerator.cxx b/Source/cmInstallTargetGenerator.cxx
index 59701a1..5cee9d3 100644
--- a/Source/cmInstallTargetGenerator.cxx
+++ b/Source/cmInstallTargetGenerator.cxx
@@ -825,7 +825,7 @@
     return;
   }
 
-  std::string ranlib =
+  const std::string& ranlib =
     this->Target->Target->GetMakefile()->GetRequiredDefinition("CMAKE_RANLIB");
   if (ranlib.empty()) {
     return;
diff --git a/Source/cmLocalGenerator.cxx b/Source/cmLocalGenerator.cxx
index 252aa4c..11ea930 100644
--- a/Source/cmLocalGenerator.cxx
+++ b/Source/cmLocalGenerator.cxx
@@ -1364,9 +1364,9 @@
 
   std::string linkLanguage = cli.GetLinkLanguage();
 
-  std::string libPathFlag =
+  const std::string& libPathFlag =
     this->Makefile->GetRequiredDefinition("CMAKE_LIBRARY_PATH_FLAG");
-  std::string libPathTerminator =
+  const std::string& libPathTerminator =
     this->Makefile->GetSafeDefinition("CMAKE_LIBRARY_PATH_TERMINATOR");
 
   // Add standard libraries for this language.
diff --git a/Source/cmLocalVisualStudio7Generator.cxx b/Source/cmLocalVisualStudio7Generator.cxx
index 7019552..3946285 100644
--- a/Source/cmLocalVisualStudio7Generator.cxx
+++ b/Source/cmLocalVisualStudio7Generator.cxx
@@ -931,7 +931,7 @@
   std::string extraLinkOptionsBuildTypeDef =
     rootLinkerFlags + "_" + configTypeUpper;
 
-  std::string extraLinkOptionsBuildType =
+  const std::string& extraLinkOptionsBuildType =
     this->Makefile->GetRequiredDefinition(extraLinkOptionsBuildTypeDef);
 
   return extraLinkOptionsBuildType;
@@ -947,21 +947,18 @@
   std::string extraLinkOptions;
   if (target->GetType() == cmStateEnums::EXECUTABLE) {
     extraLinkOptions =
-      this->Makefile->GetRequiredDefinition("CMAKE_EXE_LINKER_FLAGS") +
-      std::string(" ") +
+      this->Makefile->GetRequiredDefinition("CMAKE_EXE_LINKER_FLAGS") + " " +
       GetBuildTypeLinkerFlags("CMAKE_EXE_LINKER_FLAGS", configName);
   }
   if (target->GetType() == cmStateEnums::SHARED_LIBRARY) {
     extraLinkOptions =
       this->Makefile->GetRequiredDefinition("CMAKE_SHARED_LINKER_FLAGS") +
-      std::string(" ") +
-      GetBuildTypeLinkerFlags("CMAKE_SHARED_LINKER_FLAGS", configName);
+      " " + GetBuildTypeLinkerFlags("CMAKE_SHARED_LINKER_FLAGS", configName);
   }
   if (target->GetType() == cmStateEnums::MODULE_LIBRARY) {
     extraLinkOptions =
       this->Makefile->GetRequiredDefinition("CMAKE_MODULE_LINKER_FLAGS") +
-      std::string(" ") +
-      GetBuildTypeLinkerFlags("CMAKE_MODULE_LINKER_FLAGS", configName);
+      " " + GetBuildTypeLinkerFlags("CMAKE_MODULE_LINKER_FLAGS", configName);
   }
 
   const char* targetLinkFlags = target->GetProperty("LINK_FLAGS");
diff --git a/Source/cmMakefile.cxx b/Source/cmMakefile.cxx
index ab139c0..1839333 100644
--- a/Source/cmMakefile.cxx
+++ b/Source/cmMakefile.cxx
@@ -2193,7 +2193,7 @@
   }
 
   // Shouldn't get here, but just in case, return the default group.
-  return &groups.front();
+  return groups.data();
 }
 #endif
 
@@ -2425,16 +2425,18 @@
     cmSystemTools::SameFile(fileName, this->GetHomeOutputDirectory());
 }
 
-std::string cmMakefile::GetRequiredDefinition(const std::string& name) const
+const std::string& cmMakefile::GetRequiredDefinition(
+  const std::string& name) const
 {
-  const char* ret = this->GetDefinition(name);
-  if (!ret) {
+  static std::string const empty;
+  const std::string* def = GetDef(name);
+  if (!def) {
     cmSystemTools::Error("Error required internal CMake variable not "
                          "set, cmake may not be built correctly.\n",
                          "Missing variable is:\n", name.c_str());
-    return std::string();
+    return empty;
   }
-  return std::string(ret);
+  return *def;
 }
 
 bool cmMakefile::IsDefinitionSet(const std::string& name) const
diff --git a/Source/cmMakefile.h b/Source/cmMakefile.h
index 70a5689..fce90f2 100644
--- a/Source/cmMakefile.h
+++ b/Source/cmMakefile.h
@@ -436,7 +436,7 @@
   const char* GetDefinition(const std::string&) const;
   const std::string* GetDef(const std::string&) const;
   const std::string& GetSafeDefinition(const std::string&) const;
-  std::string GetRequiredDefinition(const std::string& name) const;
+  const std::string& GetRequiredDefinition(const std::string& name) const;
   bool IsDefinitionSet(const std::string&) const;
   /**
    * Get the list of all variables in the current space. If argument
diff --git a/Source/cmMakefileTargetGenerator.cxx b/Source/cmMakefileTargetGenerator.cxx
index af34169..cfaa1fd9 100644
--- a/Source/cmMakefileTargetGenerator.cxx
+++ b/Source/cmMakefileTargetGenerator.cxx
@@ -654,19 +654,20 @@
       std::string cmdVar;
       if (this->GeneratorTarget->GetPropertyAsBool(
             "CUDA_SEPARABLE_COMPILATION")) {
-        cmdVar = std::string("CMAKE_CUDA_COMPILE_SEPARABLE_COMPILATION");
+        cmdVar = "CMAKE_CUDA_COMPILE_SEPARABLE_COMPILATION";
       } else if (this->GeneratorTarget->GetPropertyAsBool(
                    "CUDA_PTX_COMPILATION")) {
-        cmdVar = std::string("CMAKE_CUDA_COMPILE_PTX_COMPILATION");
+        cmdVar = "CMAKE_CUDA_COMPILE_PTX_COMPILATION";
       } else {
-        cmdVar = std::string("CMAKE_CUDA_COMPILE_WHOLE_COMPILATION");
+        cmdVar = "CMAKE_CUDA_COMPILE_WHOLE_COMPILATION";
       }
-      std::string compileRule = this->Makefile->GetRequiredDefinition(cmdVar);
+      const std::string& compileRule =
+        this->Makefile->GetRequiredDefinition(cmdVar);
       cmSystemTools::ExpandListArgument(compileRule, compileCommands);
     } else {
-      const std::string cmdVar =
-        std::string("CMAKE_") + lang + "_COMPILE_OBJECT";
-      std::string compileRule = this->Makefile->GetRequiredDefinition(cmdVar);
+      const std::string cmdVar = "CMAKE_" + lang + "_COMPILE_OBJECT";
+      const std::string& compileRule =
+        this->Makefile->GetRequiredDefinition(cmdVar);
       cmSystemTools::ExpandListArgument(compileRule, compileCommands);
     }
 
diff --git a/Source/cmNinjaTargetGenerator.cxx b/Source/cmNinjaTargetGenerator.cxx
index 5d76dc2..b525dac 100644
--- a/Source/cmNinjaTargetGenerator.cxx
+++ b/Source/cmNinjaTargetGenerator.cxx
@@ -493,7 +493,7 @@
   if (explicitPP) {
     // Lookup the explicit preprocessing rule.
     std::string const ppVar = "CMAKE_" + lang + "_PREPROCESS_SOURCE";
-    std::string const ppCmd =
+    std::string const& ppCmd =
       this->GetMakefile()->GetRequiredDefinition(ppVar);
 
     // Explicit preprocessing always uses a depfile.
@@ -671,19 +671,18 @@
     std::string cmdVar;
     if (this->GeneratorTarget->GetPropertyAsBool(
           "CUDA_SEPARABLE_COMPILATION")) {
-      cmdVar = std::string("CMAKE_CUDA_COMPILE_SEPARABLE_COMPILATION");
+      cmdVar = "CMAKE_CUDA_COMPILE_SEPARABLE_COMPILATION";
     } else if (this->GeneratorTarget->GetPropertyAsBool(
                  "CUDA_PTX_COMPILATION")) {
-      cmdVar = std::string("CMAKE_CUDA_COMPILE_PTX_COMPILATION");
+      cmdVar = "CMAKE_CUDA_COMPILE_PTX_COMPILATION";
     } else {
-      cmdVar = std::string("CMAKE_CUDA_COMPILE_WHOLE_COMPILATION");
+      cmdVar = "CMAKE_CUDA_COMPILE_WHOLE_COMPILATION";
     }
-    std::string compileCmd = mf->GetRequiredDefinition(cmdVar);
+    const std::string& compileCmd = mf->GetRequiredDefinition(cmdVar);
     cmSystemTools::ExpandListArgument(compileCmd, compileCmds);
   } else {
-    const std::string cmdVar =
-      std::string("CMAKE_") + lang + "_COMPILE_OBJECT";
-    std::string compileCmd = mf->GetRequiredDefinition(cmdVar);
+    const std::string cmdVar = "CMAKE_" + lang + "_COMPILE_OBJECT";
+    const std::string& compileCmd = mf->GetRequiredDefinition(cmdVar);
     cmSystemTools::ExpandListArgument(compileCmd, compileCmds);
   }
 
@@ -1213,20 +1212,19 @@
     std::string cmdVar;
     if (this->GeneratorTarget->GetPropertyAsBool(
           "CUDA_SEPARABLE_COMPILATION")) {
-      cmdVar = std::string("CMAKE_CUDA_COMPILE_SEPARABLE_COMPILATION");
+      cmdVar = "CMAKE_CUDA_COMPILE_SEPARABLE_COMPILATION";
     } else if (this->GeneratorTarget->GetPropertyAsBool(
                  "CUDA_PTX_COMPILATION")) {
-      cmdVar = std::string("CMAKE_CUDA_COMPILE_PTX_COMPILATION");
+      cmdVar = "CMAKE_CUDA_COMPILE_PTX_COMPILATION";
     } else {
-      cmdVar = std::string("CMAKE_CUDA_COMPILE_WHOLE_COMPILATION");
+      cmdVar = "CMAKE_CUDA_COMPILE_WHOLE_COMPILATION";
     }
-    std::string compileCmd =
+    const std::string& compileCmd =
       this->GetMakefile()->GetRequiredDefinition(cmdVar);
     cmSystemTools::ExpandListArgument(compileCmd, compileCmds);
   } else {
-    const std::string cmdVar =
-      std::string("CMAKE_") + language + "_COMPILE_OBJECT";
-    std::string compileCmd =
+    const std::string cmdVar = "CMAKE_" + language + "_COMPILE_OBJECT";
+    const std::string& compileCmd =
       this->GetMakefile()->GetRequiredDefinition(cmdVar);
     cmSystemTools::ExpandListArgument(compileCmd, compileCmds);
   }
diff --git a/Source/cmQtAutoGenerator.cxx b/Source/cmQtAutoGenerator.cxx
index e2d7deb..fbb9df3 100644
--- a/Source/cmQtAutoGenerator.cxx
+++ b/Source/cmQtAutoGenerator.cxx
@@ -447,7 +447,7 @@
 {
   auto& pipe = *reinterpret_cast<PipeT*>(handle->data);
   pipe.Buffer_.resize(suggestedSize);
-  buf->base = &pipe.Buffer_.front();
+  buf->base = pipe.Buffer_.data();
   buf->len = pipe.Buffer_.size();
 }
 
@@ -555,11 +555,11 @@
     std::fill_n(reinterpret_cast<char*>(&UVOptions_), sizeof(UVOptions_), 0);
     UVOptions_.exit_cb = &ReadOnlyProcessT::UVExit;
     UVOptions_.file = CommandPtr_[0];
-    UVOptions_.args = const_cast<char**>(&CommandPtr_.front());
+    UVOptions_.args = const_cast<char**>(CommandPtr_.data());
     UVOptions_.cwd = Setup_.WorkingDirectory.c_str();
     UVOptions_.flags = UV_PROCESS_WINDOWS_HIDE;
     UVOptions_.stdio_count = static_cast<int>(UVOptionsStdIO_.size());
-    UVOptions_.stdio = &UVOptionsStdIO_.front();
+    UVOptions_.stdio = UVOptionsStdIO_.data();
 
     // -- Spawn process
     if (UVProcess_.spawn(*uv_loop, UVOptions_, this) != 0) {
diff --git a/Source/cmSearchPath.cxx b/Source/cmSearchPath.cxx
index 0f51e0e..f98984e 100644
--- a/Source/cmSearchPath.cxx
+++ b/Source/cmSearchPath.cxx
@@ -144,7 +144,7 @@
     // this will get incorrectly considered a network
     // path on windows and cause huge delays.
     std::string p = inPath;
-    if (!p.empty() && *p.rbegin() != '/') {
+    if (!p.empty() && p.back() != '/') {
       p += "/";
     }
 
@@ -176,7 +176,7 @@
 
   for (std::string const& path : paths) {
     std::string dir = path;
-    if (!subdir.empty() && !dir.empty() && *dir.rbegin() != '/') {
+    if (!subdir.empty() && !dir.empty() && dir.back() != '/') {
       dir += "/";
     }
     if (subdir == "include" || subdir == "lib") {
diff --git a/Source/cmServer.cxx b/Source/cmServer.cxx
index e740c05..719e6b1 100644
--- a/Source/cmServer.cxx
+++ b/Source/cmServer.cxx
@@ -97,7 +97,7 @@
   }
 
   cmSystemTools::SetMessageCallback(
-    [&request](const char* msg, const char* title) {
+    [&request](const std::string& msg, const char* title) {
       reportMessage(msg, title, request);
     });
 
@@ -165,15 +165,14 @@
   }
 }
 
-void cmServer::reportMessage(const char* msg, const char* title,
+void cmServer::reportMessage(const std::string& msg, const char* title,
                              const cmServerRequest& request)
 {
-  assert(msg);
   std::string titleString;
   if (title) {
     titleString = title;
   }
-  request.ReportMessage(std::string(msg), titleString);
+  request.ReportMessage(msg, titleString);
 }
 
 cmServerResponse cmServer::SetProtocolVersion(const cmServerRequest& request)
diff --git a/Source/cmServer.h b/Source/cmServer.h
index e1ed27a..3edc887 100644
--- a/Source/cmServer.h
+++ b/Source/cmServer.h
@@ -121,7 +121,7 @@
 private:
   static void reportProgress(const char* msg, float progress,
                              const cmServerRequest& request);
-  static void reportMessage(const char* msg, const char* title,
+  static void reportMessage(const std::string& msg, const char* title,
                             const cmServerRequest& request);
 
   // Handle requests:
diff --git a/Source/cmSiteNameCommand.cxx b/Source/cmSiteNameCommand.cxx
index 01758ee..9f041bc 100644
--- a/Source/cmSiteNameCommand.cxx
+++ b/Source/cmSiteNameCommand.cxx
@@ -52,9 +52,8 @@
   // try to find the hostname for this computer
   if (!cmSystemTools::IsOff(hostname_cmd)) {
     std::string host;
-    cmSystemTools::RunSingleCommand(hostname_cmd.c_str(), &host, nullptr,
-                                    nullptr, nullptr,
-                                    cmSystemTools::OUTPUT_NONE);
+    cmSystemTools::RunSingleCommand(hostname_cmd, &host, nullptr, nullptr,
+                                    nullptr, cmSystemTools::OUTPUT_NONE);
 
     // got the hostname
     if (!host.empty()) {
diff --git a/Source/cmStringCommand.cxx b/Source/cmStringCommand.cxx
index 91d6190..44ba82a 100644
--- a/Source/cmStringCommand.cxx
+++ b/Source/cmStringCommand.cxx
@@ -771,7 +771,7 @@
   }
   result.push_back(0);
 
-  this->Makefile->AddDefinition(variableName, &*result.begin());
+  this->Makefile->AddDefinition(variableName, result.data());
   return true;
 }
 
diff --git a/Source/cmSystemTools.cxx b/Source/cmSystemTools.cxx
index 1d20e2f..89bf2f8 100644
--- a/Source/cmSystemTools.cxx
+++ b/Source/cmSystemTools.cxx
@@ -323,16 +323,16 @@
   }
 }
 
-void cmSystemTools::Message(const char* m1, const char* title)
+void cmSystemTools::Message(const std::string& m, const char* title)
 {
   if (s_DisableMessages) {
     return;
   }
   if (s_MessageCallback) {
-    s_MessageCallback(m1, title);
+    s_MessageCallback(m, title);
     return;
   }
-  std::cerr << m1 << std::endl << std::flush;
+  std::cerr << m << std::endl << std::flush;
 }
 
 void cmSystemTools::ReportLastSystemError(const char* msg)
@@ -740,7 +740,7 @@
   argv.push_back(nullptr);
 
   cmsysProcess* cp = cmsysProcess_New();
-  cmsysProcess_SetCommand(cp, &*argv.begin());
+  cmsysProcess_SetCommand(cp, argv.data());
   cmsysProcess_SetWorkingDirectory(cp, dir);
   if (cmSystemTools::GetRunCommandHideConsole()) {
     cmsysProcess_SetOption(cp, cmsysProcess_Option_HideWindow, 1);
@@ -867,7 +867,7 @@
   return result;
 }
 
-bool cmSystemTools::RunSingleCommand(const char* command,
+bool cmSystemTools::RunSingleCommand(const std::string& command,
                                      std::string* captureStdOut,
                                      std::string* captureStdErr, int* retVal,
                                      const char* dir, OutputOption outputflag,
@@ -877,7 +877,8 @@
     outputflag = OUTPUT_NONE;
   }
 
-  std::vector<std::string> args = cmSystemTools::ParseArguments(command);
+  std::vector<std::string> args =
+    cmSystemTools::ParseArguments(command.c_str());
 
   if (args.empty()) {
     return false;
diff --git a/Source/cmSystemTools.h b/Source/cmSystemTools.h
index 0f92fe2..88758a6 100644
--- a/Source/cmSystemTools.h
+++ b/Source/cmSystemTools.h
@@ -56,7 +56,7 @@
    */
   static std::string TrimWhitespace(const std::string& s);
 
-  using MessageCallback = std::function<void(const char*, const char*)>;
+  using MessageCallback = std::function<void(const std::string&, const char*)>;
   /**
    *  Set the function used by GUIs to display error messages
    *  Function gets passed: message as a const char*,
@@ -74,11 +74,7 @@
   /**
    * Display a message.
    */
-  static void Message(const char* m, const char* title = nullptr);
-  static void Message(const std::string& m, const char* title = nullptr)
-  {
-    Message(m.c_str(), title);
-  }
+  static void Message(const std::string& m, const char* title = nullptr);
 
   using OutputCallback = std::function<void(std::string const&)>;
 
@@ -224,7 +220,7 @@
     OUTPUT_FORWARD,
     OUTPUT_PASSTHROUGH
   };
-  static bool RunSingleCommand(const char* command,
+  static bool RunSingleCommand(const std::string& command,
                                std::string* captureStdOut = nullptr,
                                std::string* captureStdErr = nullptr,
                                int* retVal = nullptr,
diff --git a/Source/cmTryRunCommand.cxx b/Source/cmTryRunCommand.cxx
index c57aabd..fff8f8e 100644
--- a/Source/cmTryRunCommand.cxx
+++ b/Source/cmTryRunCommand.cxx
@@ -189,8 +189,8 @@
     finalCommand += runArgs;
   }
   bool worked = cmSystemTools::RunSingleCommand(
-    finalCommand.c_str(), out, out, &retVal, nullptr,
-    cmSystemTools::OUTPUT_NONE, cmDuration::zero());
+    finalCommand, out, out, &retVal, nullptr, cmSystemTools::OUTPUT_NONE,
+    cmDuration::zero());
   // set the run var
   char retChar[16];
   const char* retStr;
diff --git a/Source/cmUtilitySourceCommand.cxx b/Source/cmUtilitySourceCommand.cxx
index 231bca4..b59a587 100644
--- a/Source/cmUtilitySourceCommand.cxx
+++ b/Source/cmUtilitySourceCommand.cxx
@@ -79,7 +79,7 @@
   }
 
   // The source exists.
-  std::string cmakeCFGout =
+  const std::string& cmakeCFGout =
     this->Makefile->GetRequiredDefinition("CMAKE_CFG_INTDIR");
   std::string utilityDirectory = this->Makefile->GetCurrentBinaryDirectory();
   std::string exePath;
diff --git a/Source/cmakemain.cxx b/Source/cmakemain.cxx
index 890b74e..a49246b 100644
--- a/Source/cmakemain.cxx
+++ b/Source/cmakemain.cxx
@@ -142,8 +142,8 @@
   return msg;
 }
 
-static void cmakemainMessageCallback(const char* m, const char* /*unused*/,
-                                     cmake* cm)
+static void cmakemainMessageCallback(const std::string& m,
+                                     const char* /*unused*/, cmake* cm)
 {
   std::cerr << m << cmakemainGetStack(cm) << std::endl << std::flush;
 }
@@ -319,9 +319,10 @@
   cmake cm(role, mode);
   cm.SetHomeDirectory("");
   cm.SetHomeOutputDirectory("");
-  cmSystemTools::SetMessageCallback([&cm](const char* msg, const char* title) {
-    cmakemainMessageCallback(msg, title, &cm);
-  });
+  cmSystemTools::SetMessageCallback(
+    [&cm](const std::string& msg, const char* title) {
+      cmakemainMessageCallback(msg, title, &cm);
+    });
   cm.SetProgressCallback([&cm](const char* msg, float prog) {
     cmakemainProgressCallback(msg, prog, &cm);
   });
@@ -499,9 +500,10 @@
   }
 
   cmake cm(cmake::RoleInternal, cmState::Unknown);
-  cmSystemTools::SetMessageCallback([&cm](const char* msg, const char* title) {
-    cmakemainMessageCallback(msg, title, &cm);
-  });
+  cmSystemTools::SetMessageCallback(
+    [&cm](const std::string& msg, const char* title) {
+      cmakemainMessageCallback(msg, title, &cm);
+    });
   cm.SetProgressCallback([&cm](const char* msg, float prog) {
     cmakemainProgressCallback(msg, prog, &cm);
   });
@@ -541,9 +543,10 @@
   }
 
   cmake cm(cmake::RoleInternal, cmState::Unknown);
-  cmSystemTools::SetMessageCallback([&cm](const char* msg, const char* title) {
-    cmakemainMessageCallback(msg, title, &cm);
-  });
+  cmSystemTools::SetMessageCallback(
+    [&cm](const std::string& msg, const char* title) {
+      cmakemainMessageCallback(msg, title, &cm);
+    });
   cm.SetProgressCallback([&cm](const char* msg, float prog) {
     cmakemainProgressCallback(msg, prog, &cm);
   });
diff --git a/Source/cmakexbuild.cxx b/Source/cmakexbuild.cxx
index 2951945..f5c8f07 100644
--- a/Source/cmakexbuild.cxx
+++ b/Source/cmakexbuild.cxx
@@ -22,7 +22,7 @@
 {
   hitbug = false;
   cmsysProcess* cp = cmsysProcess_New();
-  cmsysProcess_SetCommand(cp, &*argv.begin());
+  cmsysProcess_SetCommand(cp, argv.data());
   cmsysProcess_SetTimeout(cp, 0);
   cmsysProcess_Execute(cp);
   std::vector<char> out;
diff --git a/Source/cmcmd.cxx b/Source/cmcmd.cxx
index d20c5d2..4415ba6 100644
--- a/Source/cmcmd.cxx
+++ b/Source/cmcmd.cxx
@@ -826,7 +826,7 @@
         cmWrap('"', cmMakeRange(args).advance(3), '"', " ");
       int retval = 0;
       if (cmSystemTools::RunSingleCommand(
-            command.c_str(), nullptr, nullptr, &retval, directory.c_str(),
+            command, nullptr, nullptr, &retval, directory.c_str(),
             cmSystemTools::OUTPUT_PASSTHROUGH, cmDuration::zero())) {
         return retval;
       }
diff --git a/Templates/MSBuild/FlagTables/v10_CSharp.json b/Templates/MSBuild/FlagTables/v10_CSharp.json
index a0780a4..5989aea 100644
--- a/Templates/MSBuild/FlagTables/v10_CSharp.json
+++ b/Templates/MSBuild/FlagTables/v10_CSharp.json
@@ -299,11 +299,15 @@
     "flags": []
   },
   {
-    "name":  "DisabledWarnings",
-    "switch": "nowarn",
+    "name":  "NoWarn",
+    "switch": "nowarn:",
     "comment": "",
     "value": "",
-    "flags": []
+    "flags": [
+      "UserValue",
+      "UserRequired",
+      "CommaAppendable"
+    ]
   },
   {
     "name":  "CheckForOverflowUnderflow",
diff --git a/Templates/MSBuild/FlagTables/v11_CSharp.json b/Templates/MSBuild/FlagTables/v11_CSharp.json
index a0780a4..5989aea 100644
--- a/Templates/MSBuild/FlagTables/v11_CSharp.json
+++ b/Templates/MSBuild/FlagTables/v11_CSharp.json
@@ -299,11 +299,15 @@
     "flags": []
   },
   {
-    "name":  "DisabledWarnings",
-    "switch": "nowarn",
+    "name":  "NoWarn",
+    "switch": "nowarn:",
     "comment": "",
     "value": "",
-    "flags": []
+    "flags": [
+      "UserValue",
+      "UserRequired",
+      "CommaAppendable"
+    ]
   },
   {
     "name":  "CheckForOverflowUnderflow",
diff --git a/Templates/MSBuild/FlagTables/v12_CSharp.json b/Templates/MSBuild/FlagTables/v12_CSharp.json
index a0780a4..5989aea 100644
--- a/Templates/MSBuild/FlagTables/v12_CSharp.json
+++ b/Templates/MSBuild/FlagTables/v12_CSharp.json
@@ -299,11 +299,15 @@
     "flags": []
   },
   {
-    "name":  "DisabledWarnings",
-    "switch": "nowarn",
+    "name":  "NoWarn",
+    "switch": "nowarn:",
     "comment": "",
     "value": "",
-    "flags": []
+    "flags": [
+      "UserValue",
+      "UserRequired",
+      "CommaAppendable"
+    ]
   },
   {
     "name":  "CheckForOverflowUnderflow",
diff --git a/Templates/MSBuild/FlagTables/v140_CSharp.json b/Templates/MSBuild/FlagTables/v140_CSharp.json
index a0780a4..5989aea 100644
--- a/Templates/MSBuild/FlagTables/v140_CSharp.json
+++ b/Templates/MSBuild/FlagTables/v140_CSharp.json
@@ -299,11 +299,15 @@
     "flags": []
   },
   {
-    "name":  "DisabledWarnings",
-    "switch": "nowarn",
+    "name":  "NoWarn",
+    "switch": "nowarn:",
     "comment": "",
     "value": "",
-    "flags": []
+    "flags": [
+      "UserValue",
+      "UserRequired",
+      "CommaAppendable"
+    ]
   },
   {
     "name":  "CheckForOverflowUnderflow",
diff --git a/Templates/MSBuild/FlagTables/v141_CSharp.json b/Templates/MSBuild/FlagTables/v141_CSharp.json
index a0780a4..5989aea 100644
--- a/Templates/MSBuild/FlagTables/v141_CSharp.json
+++ b/Templates/MSBuild/FlagTables/v141_CSharp.json
@@ -299,11 +299,15 @@
     "flags": []
   },
   {
-    "name":  "DisabledWarnings",
-    "switch": "nowarn",
+    "name":  "NoWarn",
+    "switch": "nowarn:",
     "comment": "",
     "value": "",
-    "flags": []
+    "flags": [
+      "UserValue",
+      "UserRequired",
+      "CommaAppendable"
+    ]
   },
   {
     "name":  "CheckForOverflowUnderflow",
diff --git a/Tests/CMakeLists.txt b/Tests/CMakeLists.txt
index ed98d97..8094c40 100644
--- a/Tests/CMakeLists.txt
+++ b/Tests/CMakeLists.txt
@@ -1413,6 +1413,10 @@
     add_subdirectory(FindCURL)
   endif()
 
+  if(CMake_TEST_FindCups)
+    add_subdirectory(FindCups)
+  endif()
+
   if(CMake_TEST_FindDoxygen)
     add_subdirectory(FindDoxygen)
   endif()
@@ -3373,6 +3377,7 @@
         --build-options ${build_options}
           -DCMake_TEST_NESTED_MAKE_PROGRAM:FILEPATH=${CMake_TEST_EXPLICIT_MAKE_PROGRAM}
           -DCMake_TEST_Fortran_SUBMODULES:BOOL=${CMake_TEST_Fortran_SUBMODULES}
+          ${CMake_TEST_FortranModules_BUILD_OPTIONS}
         )
       list(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/FortranModules")
     endif()
diff --git a/Tests/FindCups/CMakeLists.txt b/Tests/FindCups/CMakeLists.txt
new file mode 100644
index 0000000..5be1ac1
--- /dev/null
+++ b/Tests/FindCups/CMakeLists.txt
@@ -0,0 +1,10 @@
+add_test(NAME FindCups.Test COMMAND
+  ${CMAKE_CTEST_COMMAND} -C $<CONFIGURATION>
+  --build-and-test
+  "${CMake_SOURCE_DIR}/Tests/FindCups/Test"
+  "${CMake_BINARY_DIR}/Tests/FindCups/Test"
+  ${build_generator_args}
+  --build-project FindCups
+  --build-options ${build_options}
+  --test-command ${CMAKE_CTEST_COMMAND} -V -C $<CONFIGURATION>
+  )
diff --git a/Tests/FindCups/Test/CMakeLists.txt b/Tests/FindCups/Test/CMakeLists.txt
new file mode 100644
index 0000000..9e90553
--- /dev/null
+++ b/Tests/FindCups/Test/CMakeLists.txt
@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 3.10)
+project(TestFindCups C)
+include(CTest)
+
+find_package(Cups REQUIRED)
+
+add_definitions(-DCMAKE_EXPECTED_CUPS_VERSION="${CUPS_VERSION_STRING}")
+
+add_executable(test_tgt main.c)
+target_link_libraries(test_tgt Cups::Cups)
+add_test(NAME test_tgt COMMAND test_tgt)
+
+add_executable(test_var main.c)
+target_include_directories(test_var PRIVATE ${CUPS_INCLUDE_DIRS})
+target_link_libraries(test_var PRIVATE ${CUPS_LIBRARIES})
+add_test(NAME test_var COMMAND test_var)
diff --git a/Tests/FindCups/Test/main.c b/Tests/FindCups/Test/main.c
new file mode 100644
index 0000000..b69d621
--- /dev/null
+++ b/Tests/FindCups/Test/main.c
@@ -0,0 +1,12 @@
+#include <cups/cups.h>
+
+int main()
+{
+  int num_options = 0;
+  cups_option_t* options = NULL;
+
+  num_options = cupsAddOption(CUPS_COPIES, "1", num_options, &options);
+  cupsFreeOptions(num_options, options);
+
+  return 0;
+}
diff --git a/Tests/RunCMake/VS10Project/RunCMakeTest.cmake b/Tests/RunCMake/VS10Project/RunCMakeTest.cmake
index 7c1ed4e..df253a9 100644
--- a/Tests/RunCMake/VS10Project/RunCMakeTest.cmake
+++ b/Tests/RunCMake/VS10Project/RunCMakeTest.cmake
@@ -1,5 +1,6 @@
 include(RunCMake)
 
+run_cmake(VsCSharpCompilerOpts)
 run_cmake(ExplicitCMakeLists)
 run_cmake(SourceGroupCMakeLists)
 
diff --git a/Tests/RunCMake/VS10Project/VsCSharpCompilerOpts-check.cmake b/Tests/RunCMake/VS10Project/VsCSharpCompilerOpts-check.cmake
new file mode 100644
index 0000000..3e418c3
--- /dev/null
+++ b/Tests/RunCMake/VS10Project/VsCSharpCompilerOpts-check.cmake
@@ -0,0 +1,64 @@
+#
+# Check C# VS project for required elements.
+#
+set(csProjectFile "${RunCMake_TEST_BINARY_DIR}/foo.csproj")
+if(NOT EXISTS "${csProjectFile}")
+  set(RunCMake_TEST_FAILED "Project file ${csProjectFile} does not exist.")
+  return()
+endif()
+
+
+set(inDebug FALSE)
+set(inRelease FALSE)
+set(debugOK FALSE)
+set(releaseOK FALSE)
+
+
+file(STRINGS "${csProjectFile}" lines)
+foreach(line IN LISTS lines)
+  #message(STATUS ${line})
+  if(line MATCHES "^ *<PropertyGroup .*Debug\\|(Win32|x64).*")
+    set(inDebug TRUE)
+  elseif(line MATCHES "^ *<PropertyGroup .*Release\\|(Win32|x64).*")
+    set(inRelease TRUE)
+  elseif(line MATCHES "^ *</PropertyGroup> *$")
+    set(inRelease FALSE)
+    set(inDebug  FALSE)
+  elseif(inDebug AND
+    (line MATCHES "^ *<NoWarn>.*505.*</NoWarn> *$") AND
+    (line MATCHES "^ *<NoWarn>.*707.*</NoWarn> *$") AND
+    (line MATCHES "^ *<NoWarn>.*808.*</NoWarn> *$") AND
+    (line MATCHES "^ *<NoWarn>.*909.*</NoWarn> *$")
+    )
+    set(debugOK TRUE)
+  elseif(inRelease AND
+    (NOT (line MATCHES "^ *<NoWarn>.*505.*</NoWarn> *$")) AND
+    (line MATCHES "^ *<NoWarn>.*707.*</NoWarn> *$") AND
+    (line MATCHES "^ *<NoWarn>.*808.*</NoWarn> *$") AND
+    (line MATCHES "^ *<NoWarn>.*909.*</NoWarn> *$")
+    )
+    set(releaseOK TRUE)
+  endif()
+endforeach()
+
+function(print_csprojfile)
+  file(STRINGS "${csProjectFile}" lines)
+  foreach(line IN LISTS lines)
+    message(STATUS ${line})
+  endforeach()
+endfunction()
+
+
+if(NOT debugOK)
+  message(STATUS "Failed to set Debug configuration warning config correctly.")
+  set(RunCMake_TEST_FAILED "Failed to set Debug configuration defines correctly.")
+  print_csprojfile()
+  return()
+endif()
+
+if(NOT releaseOK)
+  message(STATUS "Failed to set Release configuration warning config correctly.")
+  set(RunCMake_TEST_FAILED "Failed to set Release configuration defines correctly.")
+  print_csprojfile()
+  return()
+endif()
diff --git a/Tests/RunCMake/VS10Project/VsCSharpCompilerOpts.cmake b/Tests/RunCMake/VS10Project/VsCSharpCompilerOpts.cmake
new file mode 100644
index 0000000..85af38b
--- /dev/null
+++ b/Tests/RunCMake/VS10Project/VsCSharpCompilerOpts.cmake
@@ -0,0 +1,14 @@
+enable_language(CSharp)
+
+add_library(foo SHARED
+  foo.cs)
+
+set_target_properties(foo PROPERTIES
+  LINKER_LANGUAGE CSharp)
+
+
+# Issue 18878
+target_compile_options(foo PRIVATE	"/platform:anycpu" "/nowarn:707,808" "/nowarn:909" )
+
+# Debug only warning disable
+set(CMAKE_CSharp_FLAGS_DEBUG "${CMAKE_CSharp_FLAGS_DEBUG} /nowarn:505")