add support for 4.24

Author: mikeseese

DataSerialization.uplugin

@@ -10,7 +10,7 @@
   "DocsURL": "",
   "MarketplaceURL": "com.epicgames.launcher://ue/marketplace/product/51bfff9f8bc34c3d8072b31455965276",
   "SupportURL": "https://discord.gg/5hFrK2D",
-  "EngineVersion": "4.26.0",
+  "EngineVersion": "4.24.0",
   "CanContainContent": false,
   "IsBetaVersion": false,
   "IsExperimentalVersion": false,

Source/DataSerialization/Private/csv.hpp

@@ -5830,7 +5830,7 @@ namespace csv {
 
     /** Retrieve this field's value as a long double */
     template<>
-    CONSTEXPR long double CSVField::get<long double>() {
+    long double CSVField::get<long double>() {
         if (!is_num()) {
             UE_LOG(LogDataSerialization, Error, TEXT("%s; returning 0!"), internals::ERROR_NAN.c_str());
             return 0.0f;

build.bat

@@ -1,9 +1,9 @@
 echo off
 
-set LINUX_MULTIARCH_ROOT=C:\UnrealToolchains\v17_clang-10.0.1-centos7\
+set LINUX_MULTIARCH_ROOT=C:\UnrealToolchains\v15_clang-10.0.1-centos7\
 %LINUX_MULTIARCH_ROOT%x86_64-unknown-linux-gnu\bin\clang++ -v
 
-"C:\Program Files\Epic Games\UE_4.26\Engine\Build\BatchFiles\RunUAT.bat" ^
+"C:\Program Files\Epic Games\UE_4.24\Engine\Build\BatchFiles\RunUAT.bat" ^
   BuildPlugin ^
   -Plugin=%CD%\DataSerialization.uplugin ^
   -Package=%CD%\Dist ^