xtensa-lx106-elf-g++: error: unrecognized command line option '-std=gnu++17'

[hajos118]

Describe the problem

"Verify" works, "upload" brings the error message:

xtensa-lx106-elf-g++: error: unrecognized command line option '-std=gnu++17'

To reproduce

Sketch:

unsigned long previousMillis;

void setup() {
  Serial.begin(9600);
}

void loop() {
  if (Serial.available() > 0) {
    while (Serial.available() > 0) {
      Serial.write(Serial.read());
    }
    Serial.println();
  } else if (millis() - previousMillis >= 1000) {
    previousMillis = millis();
    Serial.println(random(100));
  }
}

CPU: LOLIN(WEMOS) D1 R2 & mini

Expected behavior

Works fine with old IDE

Arduino IDE version

IDE 2.0.0-rc5

Operating system

Windows

Operating system version

10

Issue checklist

• I searched for previous reports in the issue tracker
• I verified the problem still occurs when using the latest nightly build
• My report contains all necessary details

[per1234]

Hi @hajos118. Thanks for taking the time to submit an issue.

I see we have another report about this at #1182.

It is best to have only a single issue per subject so we can consolidate all relevant discussion to one place. Even though this one came first, I started an investigation on the newer one, so I'll go ahead and close this in favor of the other.

If you end up with additional information to share, feel free to comment in the other thread. I would be interested to hear over there whether you are still experiencing this problem when using Arduino IDE 2.x, and if not, what the solution was you found.