From f324e2154ee86ae1b6b8483392eddbf418e6381b Mon Sep 17 00:00:00 2001
From: Martin Baulig <martin.baulig@xamarin.com>
Date: Wed, 5 Jun 2013 03:39:54 +0200
Subject: Add PCL support to the internal build system.

---
 .../MonoDevelop.CSharp/CSharpBindingCompilerManager.cs | 10 +++++++++-
 .../SystemAssemblyService.cs                           | 18 ++++++++++++++++++
 .../MonoDevelop.Core.Assemblies/TargetRuntime.cs       | 15 ++++++++++++++-
 3 files changed, 41 insertions(+), 2 deletions(-)

diff --git a/main/src/addins/CSharpBinding/MonoDevelop.CSharp/CSharpBindingCompilerManager.cs b/main/src/addins/CSharpBinding/MonoDevelop.CSharp/CSharpBindingCompilerManager.cs
index 50367e1422..2cacafd70f 100644
--- a/main/src/addins/CSharpBinding/MonoDevelop.CSharp/CSharpBindingCompilerManager.cs
+++ b/main/src/addins/CSharpBinding/MonoDevelop.CSharp/CSharpBindingCompilerManager.cs
@@ -27,6 +27,7 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
+using System.Linq;
 using System.Diagnostics;
 using System.Text.RegularExpressions;
 using System.Text;
@@ -159,7 +160,14 @@ namespace MonoDevelop.CSharp
 					}
 				}
 			}
-			
+
+			if (alreadyAddedReference.Any (reference => SystemAssemblyService.ContainsReferenceToSystemRuntime (reference))) {
+				LoggingService.LogInfo ("Found PCLv2 assembly.");
+				var facades = runtime.FindFacadeAssembliesForPCL (project.TargetFramework);
+				foreach (var facade in facades)
+					AppendQuoted (sb, "/r:", facade);
+			}
+
 			string sysCore = project.AssemblyContext.GetAssemblyFullName ("System.Core", project.TargetFramework);
 			if (sysCore != null) {
 				sysCore = project.AssemblyContext.GetAssemblyLocation (sysCore, project.TargetFramework);
diff --git a/main/src/core/MonoDevelop.Core/MonoDevelop.Core.Assemblies/SystemAssemblyService.cs b/main/src/core/MonoDevelop.Core/MonoDevelop.Core.Assemblies/SystemAssemblyService.cs
index f9eb156bb7..d757ed1ba7 100644
--- a/main/src/core/MonoDevelop.Core/MonoDevelop.Core.Assemblies/SystemAssemblyService.cs
+++ b/main/src/core/MonoDevelop.Core/MonoDevelop.Core.Assemblies/SystemAssemblyService.cs
@@ -391,6 +391,24 @@ namespace MonoDevelop.Core.Assemblies
 			}
 		}
 
+		public static bool ContainsReferenceToSystemRuntime (string fileName)
+		{
+			using (var universe = new IKVM.Reflection.Universe ()) {
+				IKVM.Reflection.Assembly assembly;
+				try {
+					assembly = universe.LoadFile (fileName);
+				} catch {
+					return false;
+				}
+				foreach (var r in assembly.GetReferencedAssemblies ()) {
+					if (r.FullName.Equals ("System.Runtime, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"))
+						return true;
+				}
+			}
+
+			return false;
+		}
+
 		public class ManifestResource
 		{
 			public string Name {
diff --git a/main/src/core/MonoDevelop.Core/MonoDevelop.Core.Assemblies/TargetRuntime.cs b/main/src/core/MonoDevelop.Core/MonoDevelop.Core.Assemblies/TargetRuntime.cs
index b29e6b028b..04225123bb 100644
--- a/main/src/core/MonoDevelop.Core/MonoDevelop.Core.Assemblies/TargetRuntime.cs
+++ b/main/src/core/MonoDevelop.Core/MonoDevelop.Core.Assemblies/TargetRuntime.cs
@@ -281,7 +281,20 @@ namespace MonoDevelop.Core.Assemblies
 		{
 			return GetBackend (fx).GetFrameworkFolders ();
 		}
-		
+
+		public IEnumerable<string> FindFacadeAssembliesForPCL (TargetFramework tx)
+		{
+			foreach (var folder in GetFrameworkFolders (tx)) {
+				var facades = Path.Combine (folder, "Facades");
+				if (!Directory.Exists (facades))
+					continue;
+
+				return Directory.GetFiles (facades, "*.dll");
+			}
+
+			return null;
+		}
+
 		/// <summary>
 		/// Returns a list of environment variables that should be set when running tools using this runtime
 		/// </summary>
-- 
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