I just got my hands on a couple Core 2 which I plan to use on my Mac (Intel Core I9, Monterey 12.6.7) with the Arduino environment - both the IDE Version: 2.1.1 and 1.8.19

I followed the guidelines I found at https://docs.m5stack.com/en/quick_start/core2/arduino to configure my Arduino environment

When trying to compile a very simple code that does nothing

void setup() {}
void loop() {}

there is no issue, the process works

but when I try to just add the include for the M5Core2

#include <M5Core2.h>
void setup() {}
void loop() {}

and try to compile again

• it first starts OK
• then I get tons of warnings related to
  missing initializer for member 'GFXfont::smooth_bpp
  or
  warning: missing initializer for member 'GFXfont::range'
• then it continues
• then I get more warnings in the RTC code or other modules like
  M5Core2/src/RTC.cpp:221:30: warning: comparison is always true due to limited range of data type
• then I get a bunch of warning for the fonts such as
  warning: missing initializer for member 'GFXfont::smooth_bpp'
• and a last one about
  .../M5Core2/src/Fonts/glcdfont.c:10:28: error: 'font' defined but not used [-Werror=unused-const-variable=] static const unsigned char font[] PROGMEM = { ^~~~
cc1: some warnings being treated as errors

and then the compilation process ends with
exit status 1
Erreur de compilation pour la carte M5Stack-Core2

I suspect the issue is due to compiler flags as I've seen that report
cc1: some warnings being treated as errors

How to solve that ?

Anyone using Core2 in the Arduino environment should be affected if this is the root cause but I could not find specific complaints about this.

What did I miss?

thx