getting started with Core2 and stuck.

jmarduino

Hi

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

jmarduino

answering to myself :

the issue comes from setting the warnings to max level in the IDE's preferences
short term fix = drop down the level of warnings to default
long term fix : fix all the files with a warning. most of them are in the font area.

I find it surprising the libraries were not tested with all warnings on...

NotInTheMafia

@jmarduino save yourself trouble of converting your code later and use the M5Unified library, not M5Core2.

jmarduino

@notinthemafia thanks for the hint

jmarduino

actually just tried and it has similar issues. If you compile some of the examples with all warnings turned on in the IDE, the compiler stops

error: unused variable 'names' [-Werror=unused-variable]
   static constexpr const char* const names[] = { "none", "wasHold", "wasClicked", "wasPressed", "wasReleased", "wasDeciedCount" };
                                      ^~~~~
cc1plus: some warnings being treated as errors