CTC Bizer Marlin Not Compiling Arduino

[MechEng2016]

I used an Arduino compiler and set it for Arduino Mega 2560 board. My CTC Bizer uses a 2560 ATmega chip. It appears to give similar errors between the Marlin 2.0, 2.1 and the bug fixes. I am am trying to make a hex file to directly upload to the CTC board. I was able to upload a Marlin hex file another person created. The hex file worked but, I wanted to make some changes. Below is about 1/8 of the errors that I received. Anyone know what the main issue is and how to correct it? I can provide more of the error messages as needed.

In file included from C:\Users*\Documents\Marlin-bugfix-2.1.x\Marlin-bugfix-2.1.x\Marlin\src\HAL\AVR\HAL.h:30:0,
from C:\Users*\Documents\Marlin-bugfix-2.1.x\Marlin-bugfix-2.1.x\Marlin\src\HAL\HAL.h:30,
from C:\Users*\Documents\Marlin-bugfix-2.1.x\Marlin-bugfix-2.1.x\Marlin\src\inc\MarlinConfig.h:33,
from C:\Users*\Documents\Marlin-bugfix-2.1.x\Marlin-bugfix-2.1.x\Marlin\src\lcd\marlinui.h:24,
from C:\Users*\Documents\Marlin-bugfix-2.1.x\Marlin-bugfix-2.1.x\Marlin\src\lcd\HD44780\lcdprint_hd44780.cpp:41:
C:\Users*\Documents\Marlin-bugfix-2.1.x\Marlin-bugfix-2.1.x\Marlin\src\pins\mega\pins_MIGHTYBOARD_REVE.h:227:51: error: pasting "/* G5*/" and "_RPORT" does not give a valid preprocessing token
#define BEEPER_PIN 4 // G5
^
C:\Users*\Documents\Marlin-bugfix-2.1.x\Marlin-bugfix-2.1.x\Marlin\src\HAL\AVR\fastio.h:84:39: note: in definition of macro '_TOGGLE'
#define _TOGGLE(IO) (DIO ## IO ## _RPORT = _BV(DIO ## IO ## _PIN))
^~
C:\Users*\Documents\Marlin-bugfix-2.1.x\Marlin-bugfix-2.1.x\Marlin\src\libs\buzzer.h:64:43: note: in expansion of macro 'TOGGLE'
FORCE_INLINE static void invert() { TOGGLE(BEEPER_PIN); }
^~~~~~
C:\Users****\Documents\Marlin-bugfix-2.1.x\Marlin-bugfix-2.1.x\Marlin\src\libs\buzzer.h:64:50: note: in expansion of macro 'BEEPER_PIN'
FORCE_INLINE static void invert() { TOGGLE(BEEPER_PIN); }

[ellensp]

BOARD_MIGHTYBOARD_REVE is not a Arduino Mega 2560
It has additional IO pins that are not defined with selecting Arduino Mega 2560

you need to use MegaCore https://github.com/MCUdude/MegaCore

[ellensp]

Or Use vscode, it will install correct board file for BOARD_MIGHTYBOARD_REVE for you