Preload the required Mono.Unix native library at the top of IkvmCompi…

…ler, since MSBuild isn't going to let us do it correctly, currently.

Held up on dotnet/msbuild#5037

src/IKVM.MSBuild.Tasks/IKVM.MSBuild.Tasks.csproj

@@ -12,11 +12,13 @@
         <PackageReference Include="Microsoft.Build" Version="16.9.0" />
         <PackageReference Include="Microsoft.Build.Utilities.Core" Version="16.9.0" />
         <PackageReference Include="System.Reflection.Metadata" Version="6.0.1" />
+        <PackageReference Include="Mono.Posix" Version="7.1.0-final.1.21458.1" />
+        <PackageReference Include="System.Runtime.InteropServices" Version="4.3.0" />
     </ItemGroup>
 
     <ItemGroup>
         <ProjectReference Include="..\IKVM.Java\IKVM.Java.csproj" />
-        <ProjectReference Include="..\IKVM.Tool\IKVM.Tool.csproj" AdditionalProperties="IncludeTools=false" />
+        <ProjectReference Include="..\IKVM.Tool\IKVM.Tool.csproj" />
         <ProjectReference Include="..\IKVM.Util\IKVM.Util.csproj" />
     </ItemGroup>
 

src/IKVM.MSBuild.Tasks/IkvmCompiler.cs

@@ -1,6 +1,8 @@
 using System;
 using System.IO;
 using System.Linq;
+using System.Reflection;
+using System.Runtime.InteropServices;
 using System.Threading;
 
 using IKVM.Tool.Compiler;
@@ -17,6 +19,20 @@ namespace IKVM.MSBuild.Tasks
     public class IkvmCompiler : Task
     {
 
+#if NETCOREAPP
+
+        /// <summary>
+        /// Initializes the static instance.
+        /// </summary>
+        static IkvmCompiler()
+        {
+            // preload Mono.Unix native library, MSBuild isn't capable of following dependency context
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux) && Environment.Is64BitProcess)
+                NativeLibrary.Load(Path.Combine(Path.GetDirectoryName(typeof(IkvmCompiler).Assembly.Location), "runtimes", "linux-x64", "native", "libMono.Unix.so"));
+        }
+
+#endif
+
         /// <summary>
         /// Root of the tools director.
         /// </summary>