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diff --git a/src/gos/gos_options.h b/src/gos/gos_options.h
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+/*
+ * This file is subject to the terms of the GFX License. If a copy of
+ * the license was not distributed with this file, you can obtain one at:
+ *
+ *              http://ugfx.org/license.html
+ */
+
+/**
+ * @file    src/gos/gos_options.h
+ * @brief   GOS - Operating System options header file.
+ *
+ * @addtogroup GOS
+ * @{
+ */
+
+#ifndef _GOS_OPTIONS_H
+#define _GOS_OPTIONS_H
+
+/**
+ * @name    The operating system to use. One (and only one) of these must be defined.
+ * @{
+ */
+	/**
+	 * @brief   Use ChibiOS
+	 * @details	Defaults to FALSE
+	 */
+	#ifndef GFX_USE_OS_CHIBIOS
+		#define GFX_USE_OS_CHIBIOS		FALSE
+	#endif
+	/**
+	 * @brief   Use FreeRTOS
+	 * @details	Defaults to FALSE
+	 */
+	#ifndef GFX_USE_OS_FREERTOS
+		#define GFX_USE_OS_FREERTOS		FALSE
+	#endif
+	/**
+	 * @brief   Use Win32
+	 * @details	Defaults to FALSE
+	 */
+	#ifndef GFX_USE_OS_WIN32
+		#define GFX_USE_OS_WIN32		FALSE
+	#endif
+	/**
+	 * @brief   Use a linux based system running X11
+	 * @details	Defaults to FALSE
+	 */
+	#ifndef GFX_USE_OS_LINUX
+		#define GFX_USE_OS_LINUX		FALSE
+	#endif
+	/**
+	 * @brief   Use a Mac OS-X based system
+	 * @details	Defaults to FALSE
+	 */
+	#ifndef GFX_USE_OS_OSX
+		#define GFX_USE_OS_OSX			FALSE
+	#endif
+	/**
+	 * @brief   Use a Raw 32 bit CPU based system
+	 * @details	Defaults to FALSE
+	 */
+	#ifndef GFX_USE_OS_RAW32
+		#define GFX_USE_OS_RAW32		FALSE
+	#endif
+	/**
+	 * @brief   Use a eCos
+	 * @details	Defaults to FALSE
+	 */
+	#ifndef GFX_USE_OS_ECOS
+		#define GFX_USE_OS_ECOS			FALSE
+	#endif
+/**
+ * @}
+ *
+ * @name    GOS Optional Parameters
+ * @{
+ */
+ 	/**
+ 	 * @brief	Should uGFX avoid initializing the operating system
+ 	 * @details	Defaults to FALSE
+ 	 * @note	This is not relevant to all operating systems eg Win32 never initializes the
+ 	 * 			operating system as uGFX runs as an application outside the boot process.
+ 	 * @note	Operating system initialization is not necessarily implemented for all
+ 	 * 			operating systems yet even when it is relevant. These operating systems
+ 	 * 			will display a compile warning reminding you to initialize the operating
+ 	 * 			system in your application code. Note that on these operating systems the
+ 	 * 			demo applications will not work without modification.
+ 	 */
+ 	#ifndef GFX_NO_OS_INIT
+ 		#define GFX_NO_OS_INIT			FALSE
+ 	#endif
+ 	/**
+ 	 * @brief	Should uGFX stuff be added to the FreeRTOS+Tracer
+ 	 * @details	Defaults to FALSE
+ 	 */
+ 	#ifndef GFX_FREERTOS_USE_TRACE
+ 		#define GFX_FREERTOS_USE_TRACE	FALSE
+ 	#endif
+ 	/**
+ 	 * @brief	How much RAM should uGFX use for the heap
+ 	 * @details	Defaults to 0. Only valid with GFX_USE_OS_RAW32
+ 	 * @note	If 0 then the standard C runtime malloc(), free() and realloc()
+ 	 * 			are used.
+ 	 * @note	If it is non-zero then this is the number of bytes of RAM
+ 	 * 			to use for the heap (gfxAlloc() and gfxFree()). No C
+ 	 * 			runtime routines will be used and a new routine @p gfxAddHeapBlock()
+ 	 * 			is added allowing the user to add extra memory blocks to the heap.
+ 	 */
+	#ifndef GOS_RAW_HEAP_SIZE
+		#define GOS_RAW_HEAP_SIZE		0
+	#endif
+/** @} */
+
+#endif /* _GOS_OPTIONS_H */
+/** @} */