Let me start with the steps I have tried and the place I am stuck.
I am running a debian 11/arduino IDE 1.8.16
I have installed the Arduino mega AVR board, Arduino SAMD boards and MattairTEch AVR boards as shown in the previous post.
I have git clone the
and got the commit 4137a5.
cd ArduinoCore-megaavr/firmwares/MuxTO
arduino MuxTO.ino&
I have the IDE GUI with the .ino and the .h .c opened
Using the build options in tools:
I got the error below
/home/myname/.arduino15/packages/arduino/tools/arm-none-eabi-gcc/4.8.3-2014q1/bin/../lib/gcc/arm-none-eabi/4.8.3/../../../../arm-none-eabi/bin/ld: /tmp/arduino_build_517921/MuxTO.ino.elf section `.text' will not fit in region `FLASH'
/home/myname/.arduino15/packages/arduino/tools/arm-none-eabi-gcc/4.8.3-2014q1/bin/../lib/gcc/arm-none-eabi/4.8.3/../../../../arm-none-eabi/bin/ld: region `FLASH' overflowed by 744 bytes
collect2: error: ld returned 1 exit status
exit status 1
Error compiling for board Generic D11C14A.
Then I tried to checkout an older version by
git checkout ee0a9b
and repeat the compile step and got almost exact same error message.