Stinky hacks to make progress on Linux target

UIX/Microsoft/Iris/CodeModel/Cpp/DllLoadResult.cs

@@ -30,7 +30,12 @@ namespace Microsoft.Iris.CodeModel.Cpp
         public static void Startup()
         {
             DllLoadResultFactory.Startup();
+            
+#if WINDOWS
+            // TODO: Is this necessary if the render engine is implemented in C#?
             DllProxyServices.Startup();
+#endif
+            
             LoadIntrinsicTypeData();
         }
 

UIX/Microsoft/Iris/Debug/Trace.cs

@@ -35,7 +35,14 @@ namespace Microsoft.Iris.Debug
             if (s_isInitialized)
                 return;
             s_isInitialized = true;
+#if WINDOWS
             NativeApi.SpInitializeTracing();
+#endif
+            
+#if DEBUG
+            EnableAllCategories(true);
+#endif
+            
             TraceSettings.Current.Refresh();
             TraceSettings.Current.ListenForRegistryUpdates();
         }
@@ -45,7 +52,9 @@ namespace Microsoft.Iris.Debug
             if (!s_isInitialized)
                 return;
             TraceSettings.Current.StopListeningForRegistryUpdates();
+#if WINDOWS
             NativeApi.SpUninitializeTracing();
+#endif
             s_isInitialized = false;
         }
 

UIX/Microsoft/Iris/Debug/TraceSettings.cs

@@ -46,7 +46,10 @@ namespace Microsoft.Iris.Debug
         public void Refresh()
         {
             s_debugTraceFile = Environment.GetEnvironmentVariable("SPLASH_TRACE_FILE");
+#if WINDOWS
             NativeApi.SpUpdateTraceSettings(s_debugTraceFile, string.Empty, true, false, false);
+#endif
+            // TODO: Persist trace settings for non-Windows targets
         }
 
         public byte GetCategoryLevel(TraceCategory cat)

UIX/Microsoft/Iris/OS/HttpResources.cs

@@ -19,14 +19,20 @@ namespace Microsoft.Iris.OS
         {
             ResourceManager.Instance.RegisterSource("http", s_instance);
             ResourceManager.Instance.RegisterSource("https", s_instance);
+            
+            #if WINDOWS
             NativeApi.SpHttpStartup();
+            #endif
         }
 
         public static void Shutdown()
         {
             if (s_activationChangeHandler != null)
                 UISession.Default.Form.ActivationChange -= s_activationChangeHandler;
+            
+            #if WINDOWS
             NativeApi.SpHttpShutdown();
+            #endif
         }
 
         private static void OnActivationChanged(object sender, EventArgs args) => NativeApi.SpHttpFlushProxyCache();

UIX/Microsoft/Iris/UI/UIForm.cs

@@ -51,10 +51,16 @@ namespace Microsoft.Iris.UI
             _preventInterruption = false;
             UpdateStyles();
             SetWindowOptions(WindowOptions.FreeformResize, true);
+            
+#if WINDOWS
+            // Sets up callbacks for accessibility proxy
             _notificationCallback = new NativeApi.NotifyWindowCallback(OnNotifyCallback);
             IntPtr handle;
             RendererApi.IFC(NativeApi.SpCreateNotifyWindow(out handle, _notificationCallback));
             AppNotifyWindow = handle;
+#else
+            // TODO: How to implement accessibility for non-Windows targets?
+#endif
         }
 
         private void OnInitialize()