"Compilation error: Error: 2 UNKNOWN: exit status 1" error message is unnecessarily cryptic

[TheAnton205]

Describe the bug
Any program I run and attempt to compile I get this error:

c:/users/anton/appdata/local/arduino15/packages/arduino/tools/avr-gcc/7.3.0-atmel3.6.1-arduino7/bin/../lib/gcc/avr/7.3.0/../../../../avr/lib/avr5/crtatmega328p.o:(.init9+0x0): undefined reference to `main'
collect2.exe: error: ld returned 1 exit status
Compilation error: Error: 2 UNKNOWN: exit status 1

• I recently got the beta and no matter what I do I had this (yes I restarted my pc) and I even download the latest Git (2.30.1) 64-bit.

To Reproduce
Steps to reproduce the behavior:

1. Open any code
2. Click compile

Expected behavior
Expected for the code to compile.

Desktop (please complete the following information):

• OS: Windows 10 Pro 64-bit
• Version: 2.0.0-beta3

Additional context
This could be due to from when some notification occurred which I couldn't figure out what it was for. I do remember that it led to this link. However, I don't see this notification anymore?

[Pioxis]

I have the same error. I installed first DallasTemperature library from library manager, and for OneWire library I do the same.

After that I tried compile code at the bottom of the page.
But it ending with Error 2 UNKNOWN: exit status 1.
After that I installed manually libraries from .zip archives. (that works for me for old IDE). The same error.

My OS is Ubuntu 20.10

#include <DallasTemperature.h>
#include <LiquidCrystal.h>
#include <OneWire.h>

#define ONE_WIRE_BUS 2

OneWire oneWire(ONE_WIRE_BUS);

// Pass our oneWire reference to Dallas Temperature.
DallasTemperature sensors(&oneWire);

// Definicja wejść wyświetlacza ciekłokrystalicznego //definition of lcd output
LiquidCrystal lcd(4, 5, 6, 7, 8, 9);
void setup(void) {
  // Inicjacja czujnika //sensor initiation
  sensors.begin();
  // Inicjacja wyświetlacza //screen initiation
  lcd.begin(16, 2);
  lcd.clear();
}
void loop(void) {
  lcd.setCursor(0, 0);
  lcd.print("Temperatura:");
  lcd.setCursor(0, 1);
  sensors.requestTemperatures();
  lcd.print(sensors.getTempCByIndex(0));
  lcd.setCursor(6, 1);
  lcd.print("st.C");
  delay(1000);
} 

[TheAnton205]

I have the same error. I installed first DallasTemperature library from library manager, and for OneWire library I do the same.

After that I tried compile code at the bottom of the page.
But it ending with Error 2 UNKNOWN: exit status 1.
After that I installed manually libraries from .zip archives. (that works for me for old IDE). The same error.

My OS is Ubuntu 20.10

#include <DallasTemperature.h>
#include <LiquidCrystal.h>
#include <OneWire.h>

#define ONE_WIRE_BUS 2

OneWire oneWire(ONE_WIRE_BUS);

// Pass our oneWire reference to Dallas Temperature.
DallasTemperature sensors(&oneWire);

// Definicja wejść wyświetlacza ciekłokrystalicznego //definition of lcd output
LiquidCrystal lcd(4, 5, 6, 7, 8, 9);
void setup(void) {
  // Inicjacja czujnika //sensor initiation
  sensors.begin();
  // Inicjacja wyświetlacza //screen initiation
  lcd.begin(16, 2);
  lcd.clear();
}
void loop(void) {
  lcd.setCursor(0, 0);
  lcd.print("Temperatura:");
  lcd.setCursor(0, 1);
  sensors.requestTemperatures();
  lcd.print(sensors.getTempCByIndex(0));
  lcd.setCursor(6, 1);
  lcd.print("st.C");
  delay(1000);
} ```

I see. I'm not sure if it is due to libraries, I still get this error even from examples without library (File>Examples>Basics>Blink) still causes this error yet there are no libraries?

[Pioxis]

I have the same error. I installed first DallasTemperature library from library manager, and for OneWire library I do the same.
After that I tried compile code at the bottom of the page.
But it ending with Error 2 UNKNOWN: exit status 1.
After that I installed manually libraries from .zip archives. (that works for me for old IDE). The same error.
My OS is Ubuntu 20.10

#include <DallasTemperature.h>
#include <LiquidCrystal.h>
#include <OneWire.h>

#define ONE_WIRE_BUS 2

OneWire oneWire(ONE_WIRE_BUS);

// Pass our oneWire reference to Dallas Temperature.
DallasTemperature sensors(&oneWire);

// Definicja wejść wyświetlacza ciekłokrystalicznego //definition of lcd output
LiquidCrystal lcd(4, 5, 6, 7, 8, 9);
void setup(void) {
  // Inicjacja czujnika //sensor initiation
  sensors.begin();
  // Inicjacja wyświetlacza //screen initiation
  lcd.begin(16, 2);
  lcd.clear();
}
void loop(void) {
  lcd.setCursor(0, 0);
  lcd.print("Temperatura:");
  lcd.setCursor(0, 1);
  sensors.requestTemperatures();
  lcd.print(sensors.getTempCByIndex(0));
  lcd.setCursor(6, 1);
  lcd.print("st.C");
  delay(1000);
} ```

I see. I'm not sure if it is due to libraries, I still get this error even from examples without library (File>Examples>Basics>Blink) still causes this error yet there are no libraries?

For Blink example from Basic folder of examples I have that error:
Compilation error: Error: 2 UNKNOWN: no FQBN provided

[ubidefeo]

@TheAnton205 @Pioxis
have you installed any cores?

which board have you selected?
If the platform for the selected board is not installed you should get prompted to install it.

please try to manually add support for your board via the boards manager on the left sidebar or from the "Tools > Board > Boards Manager" menu

[Pioxis]

@TheAnton205 @Pioxis
have you installed any cores?

which board have you selected?
If the platform for the selected board is not installed you should get prompted to install it.

please try to manually add support for your board via the boards manager on the left sidebar or from the "Tools > Board > Boards Manager" menu

Additionally I get that info from my terminal, when Error appeared:

daemon INFO inventory.Store.ConfigFileUsed() /home/pioxis/.arduino15/inventory.yaml
root ERROR Request compile failed with error: 2 UNKNOWN: no FQBN provided

When I first opened program I was prompted for select the board. I selected for Arduino UNO.
I have installed Arduino AVR Boards by Arduino, version 1.8.3

[TheAnton205]

@TheAnton205 @Pioxis
have you installed any cores?

which board have you selected?
If the platform for the selected board is not installed you should get prompted to install it.

please try to manually add support for your board via the boards manager on the left sidebar or from the "Tools > Board > Boards Manager" menu

SOLVED:

For me I solved it by reinstalling the beta IDE and by reinstalling Arduino AVR Boards by Arduino, version 1.8.3

Everything seems working now, thanks.

[ChuckBland]

Same issue here. A program that easily compiles and runs under the old IDE gets:

collect2.exe: error: ld returned 1 exit status Using library IRremote at version 3.0.3 in folder: C:\Users\ccbland\Documents\Arduino\libraries\IRremote Compilation error: Error: 2 UNKNOWN: exit status 1

when compiled with V2. No other discernable complaints when using verbose mode on compile.

I did uninstall/reinstall IDE 2.0 to no avail.

Here's my program

#include "IRremote.h"

const int IR_RECEIVE_PIN = 11;
long keyPressed;


void setup()
{
    //setup serial monitor
    Serial.begin(115200);

    //initialize IR Receiver
    IrReceiver.begin(IR_RECEIVE_PIN, DISABLE_LED_FEEDBACK);
}

void loop()
{
    //check to see if a button was pressed
    if (IrReceiver.decode())
    {
        //a button press was pressed and decoded

        //get the code of the key that was pressed
        keyPressed = IrReceiver.decodedIRData.decodedRawData;

        //if that code is from the power button, tell us
        if (keyPressed==0xBA45FF00) Serial.println("Power Key Pressed");

        //wait for things to settle down
        delay(700);

        //resume receiving button presses
        IrReceiver.resume();
    }
}

[bphermansson]

I think this is a case of bad error messages. I got the error too, "Compilation error: Error: 2 UNKNOWN: exit status 1" in the output window. I started the program from the console, and there I see:

daemon INFO /tmp/.arduinoIDE-unsaved2021316-1396774-1hhgvhh.m6o3/Blink/Blink.ino:1:10: fatal error: Servo.h: No such file or directory
daemon INFO  #include <Servo.h>
daemon INFO           ^~~~~~~~~
daemon INFO compilation terminated.
root ERROR Request compile failed with error: 2 UNKNOWN: exit status 1

If I install the servo lib everything is fine, so the error message in the output window is wrong.

[ChuckBland]

Patrik, I'd like to replicate what you've done. I'm not familiar with "starting from the console". How is that done? Chuck

…

On Sat, Apr 17, 2021 at 6:54 AM Patrik Hermansson ***@***.***> wrote: I think this is a case of bad error messages. I got the error too, "Compilation error: Error: 2 UNKNOWN: exit status 1" in the output window. I started the program from the console, and there I see: daemon INFO /tmp/.arduinoIDE-unsaved2021316-1396774-1hhgvhh.m6o3/Blink/Blink.ino:1:10: fatal error: Servo.h: No such file or directory daemon INFO #include <Servo.h> daemon INFO ^~~~~~~~~ daemon INFO compilation terminated. root ERROR Request compile failed with error: 2 UNKNOWN: exit status 1 If I install the servo lib everything is fine, so the error message in the output window is wrong. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#151 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACU7VQIU55ED5DPENLUVH5DTJGHHPANCNFSM4YNAQF6A> .

[bphermansson]

I started the program from the command prompt in Linux. You can do the same with Windows Powershell . You go to the program installation folder and run the program by entering it's name. Then you see all log messages directly.

[ChuckBland]

Very cool interface. Sadly I am no closer to solution. No complaints about Servo.h, which is fine since I'm not including it. Here's the errors when I compile. daemon INFO inventory.Store.ConfigFileUsed() C:\Users\ccbland\AppData\Local\Arduino15\inventory.yaml daemon INFO inventory.Store.ConfigFileUsed() C:\Users\ccbland\AppData\Local\Arduino15\inventory.yaml daemon INFO Searching tools required for board arduino:avr:uno daemon INFO Required tool [tool: {ToolName:"arduinoOTA",ToolVersion:"1.3.0",ToolPackager:"arduino"}] daemon INFO Required tool [tool: {ToolName:"avr-gcc",ToolVersion:"7.3.0-atmel3.6.1-arduino7",ToolPackager:"arduino"}] daemon INFO Required tool [tool: {ToolName:"avrdude",ToolVersion:"6.3.0-arduino17",ToolPackager:"arduino"}] daemon INFO Adding libraries dir [dir: C:\Program Files (x86)\Arduino\libraries, location: ide] daemon INFO Adding libraries dir [dir: C:\Users\ccbland\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.3\libraries, location: platform] daemon INFO Adding libraries dir [dir: C:\Users\ccbland\Documents\Arduino\libraries, location: user] daemon INFO Resolving include IRremote.h for arch avr daemon INFO found better lib [lib: IRremote, prio: 5E9] root ERROR Request compile failed with error: 2 UNKNOWN: exit status 1

…

On Sun, Apr 18, 2021 at 6:59 AM Patrik Hermansson ***@***.***> wrote: I started the program from the command prompt in Linux. You can du the same with Windows Powershell . You go to the program installation folder and run the program by entering it's name. Then you see all log messages directly. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#151 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACU7VQJCQFSY2RRU7LX7ZRLTJLQS7ANCNFSM4YNAQF6A> .

[thelwyn]

Same issue here. Win 10 Pro 64 bits. Arduino Uno, Core installed (as suggested by the IDE itself). Can't compile anything, same error message.