Arduino include grbl +ug8lib

Hello there.
I'm new to this stuff. When trying to include ug8lib to grbl somehow they don't mash together and give error. But when uploading or verifying individually, there is no problem.

What processor are you using? An atmega328 based board (Uno, Nano, etc.) has barely enough SRAM for grbl. No way that it will hold a display library as well.

Please read the forum guidelines.

atmega (2560) adk. it's not about sram. it can't even verify it. or is it ?

The board that you are using should be information presented in the first post. There should be links to libraries not included with the IDE. We should not have to drag the basic information from you piece by piece.

Please read the guidelines.

Ok calm down. I didn't say it at first because i believe it didn't even reach there. the error wasn't about board or space more like c and cpp files didn't mesh . a programming problem .and nobody mentioned it. so maybe it's simple but i don't know.
this is the error massage
'''
Arduino: 1.8.19 (Windows 7), Board: "Arduino Mega ADK"

In file included from C:\Users\mahdi\Documents\Arduino\libraries\grbl_mega/grbl.h:43:0,

             from C:\Users\mahdi\AppData\Local\Temp\arduino_modified_sketch_600810\grblUpload.ino:29:

C:\Users\mahdi\Documents\Arduino\libraries\grbl_mega/nuts_bolts.h:56:0: warning: "max" redefined

''#define max(a,b) (((a) > (b)) ? (a) : (b))''

In file included from sketch\grblUpload.ino.cpp:1:0:

C:\Users\mahdi\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.5\cores\arduino/Arduino.h:93:0: note: this is the location of the previous definition

"#define max(a,b) ((a)>(b)?(a):(b))/"

In file included from C:\Users\mahdi\Documents\Arduino\libraries\grbl_mega/grbl.h:43:0,

             from C:\Users\mahdi\AppData\Local\Temp\arduino_modified_sketch_600810\grblUpload.ino:29:

C:\Users\mahdi\Documents\Arduino\libraries\grbl_mega/nuts_bolts.h:57:0: warning: "min" redefined

"#define min(a,b) (((a) < (b)) ? (a) : (b))/"

In file included from sketch\grblUpload.ino.cpp:1:0:

C:\Users\mahdi\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.5\cores\arduino/Arduino.h:92:0: note: this is the location of the previous definition

"#define min(a,b) ((a)<(b)?(a):(b))/"

In file included from C:\Users\mahdi\Documents\Arduino\libraries\grbl_mega/grbl.h:43:0,

             from C:\Users\mahdi\AppData\Local\Temp\arduino_modified_sketch_600810\grblUpload.ino:29:

C:\Users\mahdi\Documents\Arduino\libraries\grbl_mega/nuts_bolts.h:61:0: warning: "bit" redefined

"#define bit(n) (1 << n)/"

In file included from sketch\grblUpload.ino.cpp:1:0:

C:\Users\mahdi\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.5\cores\arduino/Arduino.h:124:0: note: this is the location of the previous definition

"#define bit(b) (1UL << (b))/"

wiring.c.o (symbol from plugin): In function `__vector_23':

(.text+0x0): multiple definition of `__vector_23'

libraries\grbl_mega\stepper.c.o (symbol from plugin):(.text+0x0): first defined here

collect2.exe: error: ld returned 1 exit status

exit status 1

Error compiling for board Arduino Mega ADK.

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
'''
'''

You should select "Board: Arduino Mega or Mega 2560" not the obsolete "Board: Arduino Mega ADK" (Android Development Kit).

Maybe I miss something but compiling grbl.h and downloading it to an UNO, Grbl is received. That works on a micro CNC provided the driver and the steppers are setup properly.

The original Grbl firmware was written for an Uno. It has since been modified to work with other processors like the Mega and ESP32 and probably others. So when I hear Grbl I think of an installation on an Uno unless informed otherwise.

changed the board to Arduino Mega or Mega 2560. still the same.

wiring.c.o (symbol from plugin): In function __vector_23':`
That error means that you are trying to define an ISR for an interrupt that already has an ISR. The interrupt is TIM0_OVF_vect. Maybe there is another library that is trying to use that vector.

If you are adding a LCD and using a Mega you shouldn't be using the Grbl library for an Uno. So what library(s) are you using?

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