[xbuild] Add $(MSBuildToolsRoot) reserved property.

diff --git a/mcs/class/Microsoft.Build.Engine/Microsoft.Build.BuildEngine/Project.cs b/mcs/class/Microsoft.Build.Engine/Microsoft.Build.BuildEngine/Project.cs
index 6be6c2170b1d8f3b07338db5609aa8f0797ea6f7..4befeb90d8c354a14a38041bbba69017d1b9fe8b 100644 (file)
--- a/mcs/class/Microsoft.Build.Engine/Microsoft.Build.BuildEngine/Project.cs
+++ b/mcs/class/Microsoft.Build.Engine/Microsoft.Build.BuildEngine/Project.cs
@@ -967,6 +967,7 @@ namespace Microsoft.Build.BuildEngine {
                                throw new Exception (String.Format ("Invalid tools version '{0}', no tools path set for this.", effective_tools_version));
                        evaluatedProperties.AddProperty (new BuildProperty ("MSBuildBinPath", toolsPath, PropertyType.Reserved));
                        evaluatedProperties.AddProperty (new BuildProperty ("MSBuildToolsPath", toolsPath, PropertyType.Reserved));
+                       evaluatedProperties.AddProperty (new BuildProperty ("MSBuildToolsRoot", Path.GetDirectoryName (toolsPath), PropertyType.Reserved));
                        evaluatedProperties.AddProperty (new BuildProperty ("MSBuildToolsVersion", effective_tools_version, PropertyType.Reserved));
                        evaluatedProperties.AddProperty (new BuildProperty ("MSBuildExtensionsPath", ExtensionsPath, PropertyType.Reserved));
                        evaluatedProperties.AddProperty (new BuildProperty ("MSBuildExtensionsPath32", ExtensionsPath, PropertyType.Reserved));