error: ordered comparison of pointer with integer zero ('char* (*)(const char*, int)' and 'int')

[Daniel Kinahan]

Trying to verify this project and getting this error and another one. Some info

• Arduino IDE 2.2.1
• Teensyduino 1.58.1
• Using latest main commit e2fd7cd
• Arduino IDE Tools Settings:
  • Board: "Teensy4.1"
  • USB Type: "Serial + MIDI + Audio"
  • CPU Speed: "600MHz"
  • Optimize: "Faster"
• CircularBuffer - AgileWare: 1.3.3
• Adafruit GFX Library: 1.11.8
• Windows 11

Full error message:

C:\TSynth-Teensy4.1\TSynth\effect_ensemble.cpp: In member function 'int16_t AudioEffectEnsemble::interpBuffer(float)':
C:\TSynth-Teensy4.1\TSynth\effect_ensemble.cpp:267:16: error: ordered comparison of pointer with integer zero ('char* (*)(const char*, int)' and 'int')
  267 |   else if(index<0) index2+=ENSEMBLE_BUFFER_SIZE;
      |           ~~~~~^~
In file included from C:\TSynth-Teensy4.1\TSynth\Audio.h:67,
                 from C:\TSynth-Teensy4.1\TSynth\TSynth.ino:48:
C:\TSynth-Teensy4.1\TSynth\synth_dc.h: In member function 'void AudioSynthWaveformDcTS::amplitude(float, float)':
C:\TSynth-Teensy4.1\TSynth\synth_dc.h:118:17: error: 'void AudioSynthWaveformDcTS::amplitude(float, float)' causes a section type conflict with 'int compare(const void*, const void*)'
  118 |   FLASHMEM void amplitude(float n, float milliseconds) {
      |                 ^~~~~~~~~
In file included from C:\TSynth-Teensy4.1\TSynth\TSynth.ino:60:
C:\TSynth-Teensy4.1\TSynth\PatchMgr.h:74:14: note: 'int compare(const void*, const void*)' was declared here
   74 | FLASHMEM int compare(const void *a, const void *b) {
      |              ^~~~~~~

[Daniel Kinahan]

I have verified that I'm also getting this on the latest released tag V2.33

[Daniel Kinahan]

For the first error it's now obvious to me after looking at the code that index should be index2. I will make a PR with that simple change soon.

I am leaning towards thinking the second error is the result of my build steps. In the FLASHMEM section
PatchMgr.h - int compare(const void*, const void*)
is already declared and causing a section type conflict with
synth_dc.h - void AudioSynthWaveformDcTS::amplitude(float, float)

Research for this tells me to declare these objects into different sections initially and combine them with a linker instruction but I'm not sure how to achieve that in this codebase. I suspect that something in TeensyDuino might have changed since the FLASHMEM definition comes from that library.

[Electrotechnique]

Fixed in V2.35.