'rx_buffer' was not declared in this scope

This? [github.com]

[github.com] This?

I DONT UNDERSTAND I DOWNLOAD THE FILE THEN THE LINE JUST DISSAPEARS? DO I HAVE TO FACTORY RESET MY HARD DRIVE?

Edited 2 time(s). Last edit at 08/04/2018 06:45AM by KaurG.

//=============================================================================
//======================= LCD / Controller Selection =======================
//========================= (Graphical LCDs) ========================
//=============================================================================

//
// CONTROLLER TYPE: Graphical 128x64 (DOGM)
//
// IMPORTANT: The U8glib library is required for Graphical Display!
// [github.com]
//

//
// RepRapDiscount FULL GRAPHIC Smart Controller
// [reprap.org]
//
//#define REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER

//
// ReprapWorld Graphical LCD
// [reprapworld.com]
//
//#define REPRAPWORLD_GRAPHICAL_LCD

//
// Activate one of these if you have a Panucatt Devices
// Viki 2.0 or mini Viki with Graphic LCD
// [panucatt.com]
//
//#define VIKI2
//#define miniVIKI

//
// MakerLab Mini Panel with graphic
// controller and SD support - [reprap.org]
//
//#define MINIPANEL

//
// MaKr3d Makr-Panel with graphic controller and SD support.
// [reprap.org]
//
//#define MAKRPANEL

//
// Adafruit ST7565 Full Graphic Controller.
// [github.com]
//
//#define ELB_FULL_GRAPHIC_CONTROLLER

//
// BQ LCD Smart Controller shipped by
// default with the BQ Hephestos 2 and Witbox 2.
//
//#define BQ_LCD_SMART_CONTROLLER

//
// Cartesio UI
// [mauk.cc]
//
//#define CARTESIO_UI

//
// LCD for Melzi Card with Graphical LCD
//
//#define LCD_FOR_MELZI

//
// SSD1306 OLED full graphics generic display
//
//#define U8GLIB_SSD1306

//
// SAV OLEd LCD module support using either SSD1306 or SH1106 based LCD modules
//
//#define SAV_3DGLCD
#if ENABLED(SAV_3DGLCD)
//#define U8GLIB_SSD1306
#define U8GLIB_SH1106
#endif

//
// Original Ulticontroller from Ultimaker 2 printer with SSD1309 I2C display and encoder
// [github.com])
//
//#define ULTI_CONTROLLER

//
// TinyBoy2 128x64 OLED / Encoder Panel
//
//#define OLED_PANEL_TINYBOY2

//
// MKS MINI12864 with graphic controller and SD support
// [reprap.org]
//
//#define MKS_MINI_12864

//
// Factory display for Creality CR-10
// [www.aliexpress.com]
//
// This is RAMPS-compatible using a single 10-pin connector.
// (For CR-10 owners who want to replace the Melzi Creality board but retain the display)
//
//#define CR10_STOCKDISPLAY

//
// ANET and Tronxy Graphical Controller
//
//#define ANET_FULL_GRAPHICS_LCD // Anet 128x64 full graphics lcd with rotary encoder as used on Anet A6
// A clone of the RepRapDiscount full graphics display but with
// different pins/wiring (see pins_ANET_10.h).

//
// MKS OLED 1.3" 128 × 64 FULL GRAPHICS CONTROLLER
// [reprap.org]
//
// Tiny, but very sharp OLED display
//
//#define MKS_12864OLED // Uses the SH1106 controller (default)
//#define MKS_12864OLED_SSD1306 // Uses the SSD1306 controller

//
// Silvergate GLCD controller
// [github.com]
//
//#define SILVER_GATE_GLCD_CONTROLLER

//=============================================================================
//============================ Other Controllers ============================
//=============================================================================

//
// CONTROLLER TYPE: Standalone / Serial


LITTERALY THE FILE THAT I JUST DOWNLOADED FROM THAT SITE

im actualy done with this thanks for trying to help me but the fu¤%/&% LINE Doesent exsist for me IM SORRY