Can't compile for HootLoader2 on new IDE

[svilex]

I installed HootLoader2 on my arduino UNO R3. Also verified the install, all good. I'm still able to normally use it as an UNO as expected:

The problem is, whenever I switch board to any of the HootLoader2 boards and try to compile anything, it always fails with the same error:

What am I doing wrong?

[NicoHood]

I guess it is not compatible with the new arduino ide. I've never tested that, as arduino does not want to help me build the ide on linux.

[svilex]

Also not working on windows, different compiler error though. Legacy IDE works fine.

[biologyscience]

Also not working on windows, different compiler error though.

Hey @svilex if you are still here, was the error about compiling or some error which occurs while uploading the sketch.
Because I get an error while uploading, just wanted to confirm before going to the legacy IDE

Edit: Legacy IDE and choosing the right board was my fix

[DRSDavidSoft]

@NicoHood Let's move away from the Arduino IDE which as this point is just the Theia IDE running the Monaco editor.

Does the new Arduino CLI work with HoodLoader2? Now that would be awesome.

[martian17]

I tried building with arduino-cli, but I see the same error as what I see on IDE

$ arduino-cli compile --fqbn HoodLoader2:avr:HoodLoader2atmega16u2:board=uno .
/home/xxx/.arduino15/packages/arduino/hardware/avr/1.8.7/cores/arduino/WString.cpp:36:47: error: 'DECIMAL_DIG' was not declared in this scope
 size_t const String::FLT_MAX_DECIMAL_PLACES = DECIMAL_DIG;
                                               ^
/home/xxx/.arduino15/packages/arduino/hardware/avr/1.8.7/cores/arduino/WString.cpp:37:47: error: 'DECIMAL_DIG' was not declared in this scope
 size_t const String::DBL_MAX_DECIMAL_PLACES = DECIMAL_DIG;
                                               ^
/home/xxx/.arduino15/packages/arduino/hardware/avr/1.8.7/cores/arduino/WString.cpp: In constructor 'String::String(float, unsigned char)':
/home/xxx/.arduino15/packages/arduino/hardware/avr/1.8.7/cores/arduino/WString.cpp:127:25: error: size of array 'buf' is not an integral constant-expression
  char buf[FLOAT_BUF_SIZE];
                         ^
/home/xxx/.arduino15/packages/arduino/hardware/avr/1.8.7/cores/arduino/WString.cpp: In constructor 'String::String(double, unsigned char)':
/home/xxx/.arduino15/packages/arduino/hardware/avr/1.8.7/cores/arduino/WString.cpp:136:26: error: size of array 'buf' is not an integral constant-expression
  char buf[DOUBLE_BUF_SIZE];
                          ^

Benutzte Bibliothek Version Pfad (Using library version path)
IRremote            4.5.0   /home/xxx/Arduino/libraries/IRremote

Verwendete Plattform Version Pfad (Using platform version path)
HoodLoader2:avr      2.0.5   /home/xxx/.arduino15/packages/HoodLoader2/hardware/avr/2.0.5
arduino:avr          1.8.7   /home/xxx/.arduino15/packages/arduino/hardware/avr/1.8.7
Fehler beim Build: exit status 1 (Build error: exit status 1)

OS: Arch Linux x86_64

[djrcapo]

@martian17 The problem is due to the IDE version, using Legacy version will work fine.