Index: src/libstring/libstring.vcxproj
===================================================================
diff -u -rfadd6c9c628de875716d96c3a497b5bc6c8dca8a -r5c266be2a01d402f56cb020cfcb0df2d030b42ef
--- src/libstring/libstring.vcxproj	(.../libstring.vcxproj)	(revision fadd6c9c628de875716d96c3a497b5bc6c8dca8a)
+++ src/libstring/libstring.vcxproj	(.../libstring.vcxproj)	(revision 5c266be2a01d402f56cb020cfcb0df2d030b42ef)
@@ -39,51 +39,52 @@
     <ProjectGuid>{5BD38175-9F48-417D-8E5B-7093B1873CE5}</ProjectGuid>
     <RootNamespace>libstring</RootNamespace>
     <Keyword>Win32Proj</Keyword>
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   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
-    <PlatformToolset>v120_xp</PlatformToolset>
+    <PlatformToolset>v141_xp</PlatformToolset>
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   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Testing Release|Win32'" Label="Configuration">
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-    <PlatformToolset>v120_xp</PlatformToolset>
+    <PlatformToolset>v141_xp</PlatformToolset>
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   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
-    <PlatformToolset>v120_xp</PlatformToolset>
+    <PlatformToolset>v141_xp</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
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   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Testing Debug|Win32'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
-    <PlatformToolset>v120_xp</PlatformToolset>
+    <PlatformToolset>v141_xp</PlatformToolset>
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     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <CharacterSet>Unicode</CharacterSet>
     <WholeProgramOptimization>true</WholeProgramOptimization>
-    <PlatformToolset>v120_xp</PlatformToolset>
+    <PlatformToolset>v141_xp</PlatformToolset>
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     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <CharacterSet>Unicode</CharacterSet>
     <WholeProgramOptimization>true</WholeProgramOptimization>
-    <PlatformToolset>v120_xp</PlatformToolset>
+    <PlatformToolset>v141_xp</PlatformToolset>
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     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>v120_xp</PlatformToolset>
+    <PlatformToolset>v141_xp</PlatformToolset>
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     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>v120_xp</PlatformToolset>
+    <PlatformToolset>v141_xp</PlatformToolset>
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   <ImportGroup Label="ExtensionSettings">
@@ -184,10 +185,13 @@
     <LinkIncremental>false</LinkIncremental>
     <TargetName>$(ProjectName)64u</TargetName>
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+  <PropertyGroup>
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+  </PropertyGroup>
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-      <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;_SCL_SECURE_NO_WARNINGS;WIN32;_DEBUG;_WINDOWS;_USRDLL;LIBSTRING_EXPORTS;_BIND_TO_CURRENT_VCLIBS_VERSION=1;NOMINMAX;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;_SCL_SECURE_NO_WARNINGS;WIN32;_DEBUG;_WINDOWS;_USRDLL;LIBSTRING_EXPORTS;_BIND_TO_CURRENT_VCLIBS_VERSION=1;NOMINMAX;_SILENCE_CXX17_CODECVT_HEADER_DEPRECATION_WARNING;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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@@ -197,22 +201,22 @@
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-      <EnableEnhancedInstructionSet>NoExtensions</EnableEnhancedInstructionSet>
       <DisableSpecificWarnings>4512;4714</DisableSpecificWarnings>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
+      <AdditionalOptions>/Zm150 /Zc:threadSafeInit- %(AdditionalOptions)</AdditionalOptions>
+      <LanguageStandard>stdcpp17</LanguageStandard>
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     <Link>
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       <SubSystem>Windows</SubSystem>
       <TargetMachine>MachineX86</TargetMachine>
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+      <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;_SCL_SECURE_NO_WARNINGS;WIN32;_DEBUG;_WINDOWS;_USRDLL;LIBSTRING_EXPORTS;_BIND_TO_CURRENT_VCLIBS_VERSION=1;NOMINMAX;TESTING;_SILENCE_CXX17_CODECVT_HEADER_DEPRECATION_WARNING;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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@@ -222,17 +226,17 @@
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-      <EnableEnhancedInstructionSet>NoExtensions</EnableEnhancedInstructionSet>
       <DisableSpecificWarnings>4512;4714</DisableSpecificWarnings>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
+      <AdditionalOptions>/Zm150 /Zc:threadSafeInit- %(AdditionalOptions)</AdditionalOptions>
+      <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>
       <GenerateDebugInformation>true</GenerateDebugInformation>
       <SubSystem>Windows</SubSystem>
       <TargetMachine>MachineX86</TargetMachine>
       <AdditionalDependencies>gmock32d.lib;%(AdditionalDependencies)</AdditionalDependencies>
       <AdditionalLibraryDirectories>"$(OutDir)"</AdditionalLibraryDirectories>
-      <ImageHasSafeExceptionHandlers>true</ImageHasSafeExceptionHandlers>
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     <PostBuildEvent>
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@@ -257,7 +261,7 @@
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     <ClCompile>
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+      <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;_SCL_SECURE_NO_WARNINGS;WIN32;_DEBUG;_WINDOWS;_USRDLL;LIBSTRING_EXPORTS;_BIND_TO_CURRENT_VCLIBS_VERSION=1;NOMINMAX;_SILENCE_CXX17_CODECVT_HEADER_DEPRECATION_WARNING;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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@@ -270,13 +274,14 @@
       <SDLCheck>true</SDLCheck>
       <AdditionalIncludeDirectories>../../ext</AdditionalIncludeDirectories>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
+      <AdditionalOptions>/Zm150 /Zc:threadSafeInit- %(AdditionalOptions)</AdditionalOptions>
+      <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>
       <GenerateDebugInformation>true</GenerateDebugInformation>
       <SubSystem>Windows</SubSystem>
       <TargetMachine>MachineX64</TargetMachine>
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@@ -285,7 +290,7 @@
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+      <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;_SCL_SECURE_NO_WARNINGS;WIN32;_DEBUG;_WINDOWS;_USRDLL;LIBSTRING_EXPORTS;_BIND_TO_CURRENT_VCLIBS_VERSION=1;NOMINMAX;TESTING;_SILENCE_CXX17_CODECVT_HEADER_DEPRECATION_WARNING;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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@@ -298,14 +303,15 @@
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       <AdditionalIncludeDirectories>..\..\ext\googletest\googletest\include;..\..\ext\googletest\googlemock\include;../../ext</AdditionalIncludeDirectories>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
+      <AdditionalOptions>/Zm150 /Zc:threadSafeInit- %(AdditionalOptions)</AdditionalOptions>
+      <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>
       <GenerateDebugInformation>true</GenerateDebugInformation>
       <SubSystem>Windows</SubSystem>
       <TargetMachine>MachineX64</TargetMachine>
       <AdditionalDependencies>gmock64d.lib;%(AdditionalDependencies)</AdditionalDependencies>
       <AdditionalLibraryDirectories>"$(OutDir)"</AdditionalLibraryDirectories>
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@@ -328,7 +334,7 @@
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+      <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;_SCL_SECURE_NO_WARNINGS;WIN32;NDEBUG;_WINDOWS;_USRDLL;LIBSTRING_EXPORTS;_BIND_TO_CURRENT_VCLIBS_VERSION=1;NOMINMAX;_SILENCE_CXX17_CODECVT_HEADER_DEPRECATION_WARNING;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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-      <EnableEnhancedInstructionSet>NoExtensions</EnableEnhancedInstructionSet>
       <DisableSpecificWarnings>4512;4714</DisableSpecificWarnings>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
+      <AdditionalOptions>/Zm150 /Zc:threadSafeInit- %(AdditionalOptions)</AdditionalOptions>
+      <LanguageStandard>stdcpp17</LanguageStandard>
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     <Link>
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@@ -348,14 +355,13 @@
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+      <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;_SCL_SECURE_NO_WARNINGS;WIN32;NDEBUG;_WINDOWS;_USRDLL;LIBSTRING_EXPORTS;_BIND_TO_CURRENT_VCLIBS_VERSION=1;NOMINMAX;TESTING;_SILENCE_CXX17_CODECVT_HEADER_DEPRECATION_WARNING;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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-      <EnableEnhancedInstructionSet>NoExtensions</EnableEnhancedInstructionSet>
       <DisableSpecificWarnings>4512;4714</DisableSpecificWarnings>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
+      <AdditionalOptions>/Zm150 /Zc:threadSafeInit- %(AdditionalOptions)</AdditionalOptions>
+      <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>
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@@ -376,7 +383,6 @@
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+      <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;_SCL_SECURE_NO_WARNINGS;WIN32;NDEBUG;_WINDOWS;_USRDLL;LIBSTRING_EXPORTS;_BIND_TO_CURRENT_VCLIBS_VERSION=1;NOMINMAX;_SILENCE_CXX17_CODECVT_HEADER_DEPRECATION_WARNING;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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@@ -421,7 +429,6 @@
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