Add TargetCompiler to Flax.Build toolchains

Source/Tools/Flax.Build/Bindings/BindingsGenerator.Cpp.cs

@@ -245,7 +245,7 @@ namespace Flax.Build.Bindings
         public static void GenerateCppVirtualWrapperCallBaseMethod(BuildData buildData, StringBuilder contents, VirtualClassInfo classInfo, FunctionInfo functionInfo, string scriptVTableBase, string scriptVTableOffset)
         {
             contents.AppendLine("            // Prevent stack overflow by calling native base method");
-            if (buildData.Toolchain is Platforms.UnixToolchain)
+            if (buildData.Toolchain.Compiler == TargetCompiler.Clang)
             {
                 // Clang compiler
                 // TODO: secure VTableFunctionInjector with mutex (even at cost of performance)
@@ -1448,7 +1448,7 @@ namespace Flax.Build.Bindings
                 }
                 var t = functionInfo.IsConst ? " const" : string.Empty;
                 contents.AppendLine($"    typedef {functionInfo.ReturnType} ({classInfo.NativeName}::*{functionInfo.UniqueName}_Signature)({thunkParams}){t};");
-                if (!(buildData.Toolchain is Platforms.UnixToolchain))
+                if (buildData.Toolchain.Compiler != TargetCompiler.Clang)
                 {
                     // MSVC or other compiler
                     contents.AppendLine($"    typedef {functionInfo.ReturnType} ({classInfo.NativeName}Internal::*{functionInfo.UniqueName}_Internal_Signature)({thunkParams}){t};");

Source/Tools/Flax.Build/Build/Toolchain.cs

@@ -6,6 +6,22 @@ using Flax.Build.NativeCpp;
 
 namespace Flax.Build
 {
+    /// <summary>
+    /// The target platform compiler types.
+    /// </summary>
+    public enum TargetCompiler
+    {
+        /// <summary>
+        /// Microsoft C++ (MSVC) C and C++ compiler and linker.
+        /// </summary>
+        MSVC,
+
+        /// <summary>
+        /// LLVM-based open source compiler.
+        /// </summary>
+        Clang,
+    }
+
     /// <summary>
     /// The base class for all build toolchains.
     /// </summary>
@@ -51,6 +67,11 @@ namespace Flax.Build
         /// </summary>
         public abstract string DllImport { get; }
 
+        /// <summary>
+        /// Gets the compiler type.
+        /// </summary>
+        public abstract TargetCompiler Compiler { get; }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="Toolchain"/> class.
         /// </summary>

Source/Tools/Flax.Build/Platforms/Unix/UnixToolchain.cs

@@ -220,6 +220,9 @@ namespace Flax.Build.Platforms
         /// <inheritdoc />
         public override string DllImport => "";
 
+        /// <inheritdoc />
+        public override TargetCompiler Compiler => TargetCompiler.Clang;
+
         /// <inheritdoc />
         public override void LogInfo()
         {

Source/Tools/Flax.Build/Platforms/Windows/WindowsToolchainBase.cs

@@ -344,6 +344,9 @@ namespace Flax.Build.Platforms
         /// <inheritdoc />
         public override string DllImport => "__declspec(dllimport)";
 
+        /// <inheritdoc />
+        public override TargetCompiler Compiler => TargetCompiler.MSVC;
+
         /// <inheritdoc />
         public override void LogInfo()
         {