[tools] Ignore any interpreter settings when the current runtime isn't MonoVM. Fixes #20398. (#21406)

Tests that exercise this code path will be included in a different PR.

Fixes #20398.

Author: rolfbjarne

tools/common/Application.cs

@@ -546,6 +546,12 @@ public void ParseInterpreter (string value)
 				InterpretedAssemblies.AddRange (value.Split (new char [] { ',' }, StringSplitOptions.RemoveEmptyEntries));
 		}
 
+		public void UnsetInterpreter ()
+		{
+			UseInterpreter = false;
+			InterpretedAssemblies.Clear ();
+		}
+
 #if !NET
 		public void ParseI18nAssemblies (string i18n)
 		{

tools/dotnet-linker/LinkerConfiguration.cs

@@ -425,6 +425,11 @@ public static LinkerConfiguration GetInstance (LinkContext context)
 			if (Driver.TargetFramework.Platform != Platform)
 				throw ErrorHelper.CreateError (99, "Inconsistent platforms. TargetFramework={0}, Platform={1}", Driver.TargetFramework.Platform, Platform);
 
+			if (Application.XamarinRuntime != XamarinRuntime.MonoVM && Application.UseInterpreter) {
+				Driver.Log (4, "The interpreter is enabled, but the current runtime isn't MonoVM. The interpreter settings will be ignored.");
+				Application.UnsetInterpreter ();
+			}
+
 			Driver.ValidateXcode (Application, false, false);
 
 			Application.InitializeCommon ();