Added to binder option NoGenIncludeDirs that contains a list of non generated include dirs.

src/Generator/Driver.cs

@@ -70,6 +70,9 @@ namespace CppSharp
             for (var i = 0; i < options.LibraryDirs.Count; i++)
                 options.LibraryDirs[i] = Path.GetFullPath(options.LibraryDirs[i]);
 #endif
+            if (options.NoGenIncludeDirs != null)
+                for (var i = 0; i < options.NoGenIncludeDirs.Count; i++)
+                    options.NoGenIncludeDirs[i] = Path.GetFullPath(options.NoGenIncludeDirs[i]);
 
             if (string.IsNullOrWhiteSpace(options.OutputNamespace))
                 options.OutputNamespace = options.LibraryName;
@@ -78,6 +81,12 @@ namespace CppSharp
         public void Setup()
         {
             ValidateOptions(Options);
+
+            if (Options.NoGenIncludeDirs != null)
+                foreach (var incDir in Options.NoGenIncludeDirs)
+                    if (!Options.IncludeDirs.Contains(incDir))
+                        Options.IncludeDirs.Add(incDir);
+
             TypeDatabase.SetupTypeMaps();
             Generator = CreateGeneratorFromKind(Options.GeneratorKind);
         }

src/Generator/Options.cs

@@ -4,7 +4,6 @@ using System.IO;
 using System.Text;
 using CppSharp.AST;
 using CppSharp.Generators;
-
 #if !OLD_PARSER
 using CppSharp.Parser;
 using CppAbi = CppSharp.Parser.AST.CppAbi;
@@ -97,6 +96,9 @@ namespace CppSharp
         public bool GenerateInternalImports;
         public bool GenerateClassMarshals;
 
+        //List of include directories that are used but not generated
+        public List<string> NoGenIncludeDirs;
+
         /// <summary>
         /// Enable this option to enable generation of finalizers.
         /// Works in both CLI and C# backends.

src/Generator/Passes/CleanUnitPass.cs

@@ -13,6 +13,9 @@ namespace CppSharp.Passes
 
         public override bool VisitTranslationUnit(TranslationUnit unit)
         {
+            if (IsTranslationGenerated(unit))
+                unit.IsGenerated = false;
+
             // Try to get an include path that works from the original include
             // directories paths.
 
@@ -49,5 +52,19 @@ namespace CppSharp.Passes
 
             return includePath.Replace('\\', '/');
         }
+
+        bool IsTranslationGenerated(TranslationUnit translationUnit)
+        {
+            if (DriverOptions.NoGenIncludeDirs == null)
+                return false;
+
+            foreach (var path in DriverOptions.NoGenIncludeDirs)
+            {
+                if (translationUnit.FilePath.StartsWith(path))
+                    return true;
+            }
+
+            return false;
+        }
     }
 }