diff --git a/source/gui/CDropDown.cpp b/source/gui/CDropDown.cpp
index fc0e7fd5cc..aa3795987c 100644
--- a/source/gui/CDropDown.cpp
+++ b/source/gui/CDropDown.cpp
@@ -19,6 +19,7 @@
 
 #include "CDropDown.h"
 
+#include "gui/CGUI.h"
 #include "gui/CGUIColor.h"
 #include "lib/external_libraries/libsdl.h"
 #include "lib/ogl.h"
diff --git a/source/gui/CGUI.cpp b/source/gui/CGUI.cpp
index f0c317b30c..74d72b6dc1 100644
--- a/source/gui/CGUI.cpp
+++ b/source/gui/CGUI.cpp
@@ -20,7 +20,7 @@
 #include <stdarg.h>
 #include <string>
 
-#include "GUI.h"
+#include "CGUI.h"
 
 // Types - when including them into the engine.
 #include "CButton.h"
@@ -102,7 +102,7 @@ InReaction CGUI::HandleEvent(const SDL_Event_* ev)
 		m_MousePos = CPos((float)ev->ev.motion.x / g_GuiScale, (float)ev->ev.motion.y / g_GuiScale);
 
 		SGUIMessage msg(GUIM_MOUSE_MOTION);
-		m_BaseObject->RecurseObject(&IGUIObject::IsHiddenOrGhost, &IGUIObject::HandleMessage, msg);
+		m_BaseObject.RecurseObject(&IGUIObject::IsHiddenOrGhost, &IGUIObject::HandleMessage, msg);
 	}
 
 	// Update m_MouseButtons. (BUTTONUP is handled later.)
@@ -143,7 +143,7 @@ InReaction CGUI::HandleEvent(const SDL_Event_* ev)
 		// Now we'll call UpdateMouseOver on *all* objects,
 		//  we'll input the one hovered, and they will each
 		//  update their own data and send messages accordingly
-		m_BaseObject->RecurseObject(&IGUIObject::IsHiddenOrGhost, &IGUIObject::UpdateMouseOver, static_cast<IGUIObject* const&>(pNearest));
+		m_BaseObject.RecurseObject(&IGUIObject::IsHiddenOrGhost, &IGUIObject::UpdateMouseOver, static_cast<IGUIObject* const&>(pNearest));
 
 		if (ev->ev.type == SDL_MOUSEBUTTONDOWN)
 		{
@@ -204,10 +204,10 @@ InReaction CGUI::HandleEvent(const SDL_Event_* ev)
 			}
 
 			// Reset all states on all visible objects
-			m_BaseObject->RecurseObject(&IGUIObject::IsHidden, &IGUIObject::ResetStates);
+			m_BaseObject.RecurseObject(&IGUIObject::IsHidden, &IGUIObject::ResetStates);
 
 			// Since the hover state will have been reset, we reload it.
-			m_BaseObject->RecurseObject(&IGUIObject::IsHiddenOrGhost, &IGUIObject::UpdateMouseOver, static_cast<IGUIObject* const&>(pNearest));
+			m_BaseObject.RecurseObject(&IGUIObject::IsHiddenOrGhost, &IGUIObject::UpdateMouseOver, static_cast<IGUIObject* const&>(pNearest));
 		}
 	}
 	catch (PSERROR_GUI& e)
@@ -260,7 +260,7 @@ InReaction CGUI::HandleEvent(const SDL_Event_* ev)
 void CGUI::TickObjects()
 {
 	const CStr action = "tick";
-	m_BaseObject->RecurseObject(nullptr, &IGUIObject::ScriptEvent, action);
+	m_BaseObject.RecurseObject(nullptr, &IGUIObject::ScriptEvent, action);
 
 	m_Tooltip.Update(FindObjectUnderMouse(), m_MousePos, *this);
 }
@@ -275,33 +275,28 @@ void CGUI::SendEventToAll(const CStr& EventName)
 	// leading to a similar problem.
 	// now fixed; case is irrelevant since all are converted to lower.
 	const CStr EventNameLower = EventName.LowerCase();
-	m_BaseObject->RecurseObject(nullptr, &IGUIObject::ScriptEvent, EventNameLower);
+	m_BaseObject.RecurseObject(nullptr, &IGUIObject::ScriptEvent, EventNameLower);
 }
 
 void CGUI::SendEventToAll(const CStr& EventName, const JS::HandleValueArray& paramData)
 {
 	const CStr EventNameLower = EventName.LowerCase();
-	m_BaseObject->RecurseObject(nullptr, &IGUIObject::ScriptEvent, EventNameLower, paramData);
+	m_BaseObject.RecurseObject(nullptr, &IGUIObject::ScriptEvent, EventNameLower, paramData);
 }
 
 CGUI::CGUI(const shared_ptr<ScriptRuntime>& runtime)
-	: m_MouseButtons(0), m_FocusedObject(NULL), m_InternalNameNumber(0)
+	: m_MouseButtons(0), m_FocusedObject(nullptr), m_InternalNameNumber(0), m_BaseObject(*this)
 {
 	m_ScriptInterface.reset(new ScriptInterface("Engine", "GUIPage", runtime));
 	m_ScriptInterface->SetCallbackData(this);
 
 	GuiScriptingInit(*m_ScriptInterface);
 	m_ScriptInterface->LoadGlobalScripts();
-
-	m_BaseObject = new CGUIDummyObject(*this);
 }
 
 CGUI::~CGUI()
 {
 	Destroy();
-
-	if (m_BaseObject)
-		delete m_BaseObject;
 }
 
 IGUIObject* CGUI::ConstructObject(const CStr& str)
@@ -343,7 +338,7 @@ void CGUI::Draw()
 
 	try
 	{
-		m_BaseObject->RecurseObject(&IGUIObject::IsHidden, &IGUIObject::Draw);
+		m_BaseObject.RecurseObject(&IGUIObject::IsHidden, &IGUIObject::Draw);
 	}
 	catch (PSERROR_GUI& e)
 	{
@@ -392,14 +387,14 @@ void CGUI::Destroy()
 void CGUI::UpdateResolution()
 {
 	// Update ALL cached
-	m_BaseObject->RecurseObject(nullptr, &IGUIObject::UpdateCachedSize);
+	m_BaseObject.RecurseObject(nullptr, &IGUIObject::UpdateCachedSize);
 }
 
 void CGUI::AddObject(IGUIObject* pObject)
 {
 	try
 	{
-		m_BaseObject->AddChild(pObject);
+		m_BaseObject.AddChild(pObject);
 
 		// Cache tree
 		pObject->RecurseObject(nullptr, &IGUIObject::UpdateCachedSize);
@@ -421,7 +416,7 @@ void CGUI::UpdateObjects()
 	try
 	{
 		// Fill freshly
-		m_BaseObject->RecurseObject(nullptr, &IGUIObject::AddToPointersMap, AllObjects);
+		m_BaseObject.RecurseObject(nullptr, &IGUIObject::AddToPointersMap, AllObjects);
 	}
 	catch (PSERROR_GUI&)
 	{
@@ -446,10 +441,10 @@ IGUIObject* CGUI::FindObjectByName(const CStr& Name) const
 		return it->second;
 }
 
-IGUIObject* CGUI::FindObjectUnderMouse() const
+IGUIObject* CGUI::FindObjectUnderMouse()
 {
 	IGUIObject* pNearest = NULL;
-	m_BaseObject->RecurseObject(&IGUIObject::IsHiddenOrGhost, &IGUIObject::ChooseMouseOverAndClosest, pNearest);
+	m_BaseObject.RecurseObject(&IGUIObject::IsHiddenOrGhost, &IGUIObject::ChooseMouseOverAndClosest, pNearest);
 	return pNearest;
 }
 
@@ -588,7 +583,7 @@ void CGUI::Xeromyces_ReadRootObjects(XMBElement Element, CXeromyces* pFile, boos
 			Xeromyces_ReadScript(child, pFile, Paths);
 		else
 			// Read in this whole object into the GUI
-			Xeromyces_ReadObject(child, pFile, m_BaseObject, subst, Paths, 0);
+			Xeromyces_ReadObject(child, pFile, &m_BaseObject, subst, Paths, 0);
 	}
 }
 
@@ -917,7 +912,7 @@ void CGUI::Xeromyces_ReadObject(XMBElement Element, CXeromyces* pFile, IGUIObjec
 
 	try
 	{
-		if (pParent == m_BaseObject)
+		if (pParent == &m_BaseObject)
 			AddObject(object);
 		else
 			pParent->AddChild(object);
diff --git a/source/gui/CGUI.h b/source/gui/CGUI.h
index dbfe39163e..0f29f31f52 100644
--- a/source/gui/CGUI.h
+++ b/source/gui/CGUI.h
@@ -23,9 +23,9 @@
 #ifndef INCLUDED_CGUI
 #define INCLUDED_CGUI
 
-#include "GUITooltip.h"
-#include "GUIbase.h"
-
+#include "gui/GUITooltip.h"
+#include "gui/GUIbase.h"
+#include "gui/CGUIDummyObject.h"
 #include "lib/input.h"
 #include "ps/Shapes.h"
 #include "ps/XML/Xeromyces.h"
@@ -50,8 +50,6 @@ struct SGUIStyle
 	std::map<CStr, CStrW> m_SettingsDefaults;
 };
 
-class JSObject; // The GUI stores a JSObject*, so needs to know that JSObject exists
-class IGUIObject;
 class CGUISpriteInstance;
 struct CGUIColor;
 class CGUIText;
@@ -60,7 +58,6 @@ class CGUIString;
 class CGUISprite;
 struct SGUIImageEffects;
 struct SGUIScrollBarStyle;
-class GUITooltip;
 
 /**
  * The main object that represents a whole GUI page.
@@ -162,7 +159,7 @@ public:
 	/**
 	 * Return the object which is an ancestor of every other GUI object.
 	 */
-	IGUIObject* GetBaseObject() const { return m_BaseObject; };
+	CGUIDummyObject& GetBaseObject() { return m_BaseObject; };
 
 	/**
 	 * Checks if object exists and return true or false accordingly
@@ -184,7 +181,7 @@ public:
 	/**
 	 * Returns the GUI object under the mouse, or NULL if none.
 	 */
-	IGUIObject* FindObjectUnderMouse() const;
+	IGUIObject* FindObjectUnderMouse();
 
 	/**
 	 * Returns the current screen coordinates of the cursor.
@@ -600,7 +597,7 @@ private:
 	 * Base Object, all its children are considered parentless
 	 * because this is not a real object per se.
 	 */
-	IGUIObject* m_BaseObject;
+	CGUIDummyObject m_BaseObject;
 
 	/**
 	 * Focused object!
diff --git a/source/gui/CGUIDummyObject.h b/source/gui/CGUIDummyObject.h
new file mode 100644
index 0000000000..2574e51f37
--- /dev/null
+++ b/source/gui/CGUIDummyObject.h
@@ -0,0 +1,49 @@
+/* Copyright (C) 2019 Wildfire Games.
+ * This file is part of 0 A.D.
+ *
+ * 0 A.D. is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 0 A.D. is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * This is the top class of the whole GUI, all objects
+ * and settings are stored within this class.
+ */
+
+#ifndef INCLUDED_CGUIDUMMYOBJECT
+#define INCLUDED_CGUIDUMMYOBJECT
+
+#include "gui/IGUIObject.h"
+
+/**
+ * Dummy object are used for the base object and objects of type "empty".
+ */
+class CGUIDummyObject : public IGUIObject
+{
+	GUI_OBJECT(CGUIDummyObject)
+
+public:
+	CGUIDummyObject(CGUI& pGUI) : IGUIObject(pGUI) {}
+
+	virtual void Draw() {}
+
+	/**
+	 * Empty can never be hovered. It is only a category.
+	 */
+	virtual bool IsMouseOver() const
+	{
+		return false;
+	}
+};
+
+#endif // INCLUDED_CGUIDUMMYOBJECT
diff --git a/source/gui/CGUIScrollBarVertical.cpp b/source/gui/CGUIScrollBarVertical.cpp
index be55cb9538..2d3a8ef6c1 100644
--- a/source/gui/CGUIScrollBarVertical.cpp
+++ b/source/gui/CGUIScrollBarVertical.cpp
@@ -20,6 +20,7 @@
 #include "CGUIScrollBarVertical.h"
 
 #include "GUI.h"
+#include "CGUI.h"
 
 #include "ps/CLogger.h"
 
diff --git a/source/gui/CGUISetting.cpp b/source/gui/CGUISetting.cpp
index 3ff8af9754..ebafe75027 100644
--- a/source/gui/CGUISetting.cpp
+++ b/source/gui/CGUISetting.cpp
@@ -19,6 +19,7 @@
 
 #include "CGUISetting.h"
 
+#include "gui/CGUI.h"
 #include "gui/GUI.h"
 
 template<typename T>
diff --git a/source/gui/CGUIString.cpp b/source/gui/CGUIString.cpp
index 2ed45e44e2..04941a6dfc 100644
--- a/source/gui/CGUIString.cpp
+++ b/source/gui/CGUIString.cpp
@@ -20,6 +20,7 @@
 #include "CGUIString.h"
 
 #include "graphics/FontMetrics.h"
+#include "gui/CGUI.h"
 #include "gui/GUI.h"
 #include "lib/utf8.h"
 #include "ps/CLogger.h"
diff --git a/source/gui/CGUIText.cpp b/source/gui/CGUIText.cpp
index a5316f3578..999ad4fa3d 100644
--- a/source/gui/CGUIText.cpp
+++ b/source/gui/CGUIText.cpp
@@ -19,6 +19,7 @@
 
 #include "CGUIText.h"
 
+#include "gui/CGUI.h"
 #include "gui/CGUIString.h"
 #include "gui/IGUIObject.h"
 #include "graphics/FontMetrics.h"
diff --git a/source/gui/CImage.cpp b/source/gui/CImage.cpp
index bdb09eedb8..5c0adfe752 100644
--- a/source/gui/CImage.cpp
+++ b/source/gui/CImage.cpp
@@ -19,8 +19,8 @@
 
 #include "CImage.h"
 
-#include "GUI.h"
-
+#include "gui/CGUI.h"
+#include "gui/GUI.h"
 #include "lib/ogl.h"
 
 CImage::CImage(CGUI& pGUI)
diff --git a/source/gui/CInput.cpp b/source/gui/CInput.cpp
index 0f6ded2719..8e16ea583e 100644
--- a/source/gui/CInput.cpp
+++ b/source/gui/CInput.cpp
@@ -19,6 +19,7 @@
 
 #include "CInput.h"
 
+#include "gui/CGUI.h"
 #include "gui/CGUIScrollBarVertical.h"
 #include "gui/GUI.h"
 #include "graphics/FontMetrics.h"
diff --git a/source/gui/CList.cpp b/source/gui/CList.cpp
index 46deb21ebf..32af716a55 100644
--- a/source/gui/CList.cpp
+++ b/source/gui/CList.cpp
@@ -19,6 +19,7 @@
 
 #include "CList.h"
 
+#include "gui/CGUI.h"
 #include "gui/CGUIColor.h"
 #include "gui/CGUIScrollBarVertical.h"
 #include "lib/external_libraries/libsdl.h"
diff --git a/source/gui/COList.cpp b/source/gui/COList.cpp
index d74aa71395..5397b41f23 100644
--- a/source/gui/COList.cpp
+++ b/source/gui/COList.cpp
@@ -19,6 +19,7 @@
 
 #include "COList.h"
 
+#include "gui/CGUI.h"
 #include "gui/CGUIColor.h"
 #include "i18n/L10n.h"
 #include "ps/CLogger.h"
diff --git a/source/gui/CProgressBar.cpp b/source/gui/CProgressBar.cpp
index 4d77cc1b3a..3abc90adda 100644
--- a/source/gui/CProgressBar.cpp
+++ b/source/gui/CProgressBar.cpp
@@ -17,9 +17,10 @@
 
 #include "precompiled.h"
 
-#include "GUI.h"
 #include "CProgressBar.h"
 
+#include "gui/CGUI.h"
+#include "gui/GUI.h"
 #include "lib/ogl.h"
 
 CProgressBar::CProgressBar(CGUI& pGUI)
diff --git a/source/gui/CSlider.cpp b/source/gui/CSlider.cpp
index 79bdc620aa..4b4a718330 100644
--- a/source/gui/CSlider.cpp
+++ b/source/gui/CSlider.cpp
@@ -16,8 +16,11 @@
  */
 
 #include "precompiled.h"
+
 #include "CSlider.h"
-#include "GUI.h"
+
+#include "gui/CGUI.h"
+#include "gui/GUI.h"
 #include "lib/ogl.h"
 
 CSlider::CSlider(CGUI& pGUI)
diff --git a/source/gui/CText.cpp b/source/gui/CText.cpp
index 0d70d66ba9..bff95cf8f4 100644
--- a/source/gui/CText.cpp
+++ b/source/gui/CText.cpp
@@ -19,6 +19,7 @@
 
 #include "CText.h"
 
+#include "gui/CGUI.h"
 #include "gui/CGUIScrollBarVertical.h"
 #include "gui/GUI.h"
 #include "lib/ogl.h"
diff --git a/source/gui/IGUIButtonBehavior.cpp b/source/gui/IGUIButtonBehavior.cpp
index 4fe38061f5..cb75ff1877 100644
--- a/source/gui/IGUIButtonBehavior.cpp
+++ b/source/gui/IGUIButtonBehavior.cpp
@@ -19,6 +19,8 @@
 
 #include "GUI.h"
 
+#include "gui/CGUI.h"
+
 IGUIButtonBehavior::IGUIButtonBehavior(CGUI& pGUI)
 	: IGUIObject(pGUI), m_Pressed(false)
 {
diff --git a/source/gui/IGUIObject.cpp b/source/gui/IGUIObject.cpp
index b7442b8c18..6490924335 100644
--- a/source/gui/IGUIObject.cpp
+++ b/source/gui/IGUIObject.cpp
@@ -19,6 +19,7 @@
 
 #include "GUI.h"
 
+#include "gui/CGUI.h"
 #include "gui/CGUISetting.h"
 #include "gui/scripting/JSInterface_GUITypes.h"
 #include "gui/scripting/JSInterface_IGUIObject.h"
@@ -516,9 +517,14 @@ bool IGUIObject::IsFocused() const
 	return m_pGUI.GetFocusedObject() == this;
 }
 
+bool IGUIObject::IsBaseObject() const
+{
+	return this == &m_pGUI.GetBaseObject();
+}
+
 bool IGUIObject::IsRootObject() const
 {
-	return m_pParent == m_pGUI.GetBaseObject();
+	return m_pParent == &m_pGUI.GetBaseObject();
 }
 
 void IGUIObject::TraceMember(JSTracer* trc)
diff --git a/source/gui/IGUIObject.h b/source/gui/IGUIObject.h
index f829530c4c..f3b535b9e0 100644
--- a/source/gui/IGUIObject.h
+++ b/source/gui/IGUIObject.h
@@ -25,9 +25,6 @@
 #ifndef INCLUDED_IGUIOBJECT
 #define INCLUDED_IGUIOBJECT
 
-#include "IGUIObject.h"
-
-#include "gui/CGUI.h"
 #include "gui/GUIbase.h"
 #include "gui/scripting/JSInterface_IGUIObject.h"
 #include "lib/input.h" // just for IN_PASS
@@ -268,7 +265,7 @@ public:
 	template<typename... Args>
 	void RecurseObject(bool(IGUIObject::*isRestricted)() const, void(IGUIObject::*callbackFunction)(Args... args), Args&&... args)
 	{
-		if (this != m_pGUI.GetBaseObject())
+		if (!IsBaseObject())
 		{
 			if (isRestricted && (this->*isRestricted)())
 				return;
@@ -445,9 +442,14 @@ private:
 	 */
 	void ChooseMouseOverAndClosest(IGUIObject*& pObject);
 
-	// Is the object a Root object, in philosophy, this means it
-	//  has got no parent, and technically, it's got the m_BaseObject
-	//  as parent.
+	/**
+	 * Returns whether this is the object all other objects are descendants of.
+	 */
+	bool IsBaseObject() const;
+
+	/**
+	 * Returns whether this object is a child of the base object.
+	 */
 	bool IsRootObject() const;
 
 	static void Trace(JSTracer* trc, void* data)
@@ -512,21 +514,4 @@ protected:
 	JS::PersistentRootedObject				m_JSObject;
 };
 
-
-/**
- * Dummy object used primarily for the root object
- * or objects of type 'empty'
- */
-class CGUIDummyObject : public IGUIObject
-{
-	GUI_OBJECT(CGUIDummyObject)
-
-public:
-	CGUIDummyObject(CGUI& pGUI) : IGUIObject(pGUI) {}
-
-	virtual void Draw() {}
-	// Empty can never be hovered. It is only a category.
-	virtual bool IsMouseOver() const { return false; }
-};
-
 #endif // INCLUDED_IGUIOBJECT
diff --git a/source/gui/IGUIScrollBar.cpp b/source/gui/IGUIScrollBar.cpp
index b61065a4d1..9ea9fe5de6 100644
--- a/source/gui/IGUIScrollBar.cpp
+++ b/source/gui/IGUIScrollBar.cpp
@@ -18,6 +18,8 @@
 #include "precompiled.h"
 
 #include "GUI.h"
+
+#include "gui/CGUI.h"
 #include "maths/MathUtil.h"
 
 IGUIScrollBar::IGUIScrollBar(CGUI& pGUI)
diff --git a/source/gui/IGUIScrollBarOwner.cpp b/source/gui/IGUIScrollBarOwner.cpp
index e3814829d2..7edf6a80d6 100644
--- a/source/gui/IGUIScrollBarOwner.cpp
+++ b/source/gui/IGUIScrollBarOwner.cpp
@@ -18,6 +18,7 @@
 #include "precompiled.h"
 
 #include "GUI.h"
+#include "gui/CGUI.h"
 
 IGUIScrollBarOwner::IGUIScrollBarOwner(CGUI& pGUI)
 	: IGUIObject(pGUI)
diff --git a/source/gui/IGUITextOwner.cpp b/source/gui/IGUITextOwner.cpp
index bb0d348ec2..6be5d71cbf 100644
--- a/source/gui/IGUITextOwner.cpp
+++ b/source/gui/IGUITextOwner.cpp
@@ -20,6 +20,7 @@
 #include "IGUITextOwner.h"
 
 #include "gui/GUI.h"
+#include "gui/CGUI.h"
 #include "gui/scripting/JSInterface_IGUITextOwner.h"
 
 #include <math.h>
diff --git a/source/gui/MiniMap.cpp b/source/gui/MiniMap.cpp
index 8e487cf6ba..0dc81ee976 100644
--- a/source/gui/MiniMap.cpp
+++ b/source/gui/MiniMap.cpp
@@ -28,6 +28,7 @@
 #include "graphics/TerrainTextureEntry.h"
 #include "graphics/TerrainTextureManager.h"
 #include "graphics/TerritoryTexture.h"
+#include "gui/CGUI.h"
 #include "gui/GUI.h"
 #include "gui/GUIManager.h"
 #include "gui/GUIMatrix.h"
diff --git a/source/ps/GameSetup/GameSetup.cpp b/source/ps/GameSetup/GameSetup.cpp
index 7e4b659163..418b691cce 100644
--- a/source/ps/GameSetup/GameSetup.cpp
+++ b/source/ps/GameSetup/GameSetup.cpp
@@ -35,6 +35,7 @@
 #include "graphics/MapReader.h"
 #include "graphics/MaterialManager.h"
 #include "graphics/TerrainTextureManager.h"
+#include "gui/CGUI.h"
 #include "gui/GUI.h"
 #include "gui/GUIManager.h"
 #include "i18n/L10n.h"
diff --git a/source/tools/atlas/GameInterface/Handlers/MiscHandlers.cpp b/source/tools/atlas/GameInterface/Handlers/MiscHandlers.cpp
index 80b7385396..ecfe8e67a5 100644
--- a/source/tools/atlas/GameInterface/Handlers/MiscHandlers.cpp
+++ b/source/tools/atlas/GameInterface/Handlers/MiscHandlers.cpp
@@ -26,6 +26,7 @@
 #include "graphics/GameView.h"
 #include "gui/GUIManager.h"
 #include "gui/GUI.h"
+#include "gui/CGUI.h"
 #include "lib/external_libraries/libsdl.h"
 #include "lib/sysdep/cpu.h"
 #include "maths/MathUtil.h"