Compiling issue with 3.7,4

[garrybrook]

Platform

ESP32

IDE / Tooling

Arduino (IDE/CLI)

What happened?

Uanable to compile with new version 3.7.4 but going back to 3.7.2 it compiles OK
The error code using Arduino IDE version 2 is below.

Stack Trace

In file included from C:\Users\garry\OneDrive\Garry's Stuff\Documents\Arduino\I2C_Hydroponics_Controller\Final_I2C_Hydroponics_Controller_V9\Final_I2C_Hydroponics_Controller_V9.ino:30:
c:\Users\garry\OneDrive\Garry's Stuff\Documents\Arduino\libraries\ESP_Async_WebServer\src/ESPAsyncWebServer.h: In member function 'tcp_state AsyncWebServer::state() const':
c:\Users\garry\OneDrive\Garry's Stuff\Documents\Arduino\libraries\ESP_Async_WebServer\src/ESPAsyncWebServer.h:1107:50: error: passing 'const AsyncServer' as 'this' argument discards qualifiers [-fpermissive]
return static_cast<tcp_state>(_server.status());
^
In file included from C:\Users\garry\OneDrive\Garry's Stuff\Documents\Arduino\I2C_Hydroponics_Controller\Final_I2C_Hydroponics_Controller_V9\Final_I2C_Hydroponics_Controller_V9.ino:29:
c:\Users\garry\OneDrive\Garry's Stuff\Documents\Arduino\libraries\AsyncTCP\src/AsyncTCP.h:198:13: note: in call to 'uint8_t AsyncServer::status()'
uint8_t status();
^~~~~~

exit status 1

Compilation error: exit status 1

Minimal Reproductible Example (MRE)

Compile issue

I confirm that:

• I have read the documentation.
• I have searched for similar discussions.
• I have searched for similar issues.
• I have looked at the examples.
• I have upgraded to the lasted version of ESPAsyncWebServer (and AsyncTCP for ESP32).

[mathieucarbou]

Hello,
Always use the latest versions.
We cannot supports all old versions.
Otherwise, keep using old versions;

Or, force the compiler to 17, or use PIO, like in the project.

  -Wall -Wextra
  -std=c++17
  -std=gnu++17
build_unflags =
  -std=gnu++1

[garrybrook]

Sorry, that means nothing to me unfortunately.

I am trying to use the latest version 3.7.4.
I have only gone back to 3.7.2 in order for the Code to compile.
3,73 returns the same error.

[mathieucarbou]

There is something wrong in your environment or libs.

Like I said, we have a CI in place which automatically compiles with PlatformIO and Arduino CLI for all platforms we support (i.e. for esp32: https://github.com/ESP32Async/ESPAsyncWebServer/blob/main/.github/workflows/build-esp32.yml). So we know it works.

The error that you have here:

c:\Users\garry\OneDrive\Garry's Stuff\Documents\Arduino\libraries\ESP_Async_WebServer\src/ESPAsyncWebServer.h:1107:50: error: passing 'const AsyncServer' as 'this' argument discards qualifiers [-fpermissive]

is the proof that you are not running with the latest versions of all libs (AsyncTCP status() function is immutable now, in your version, it is not)

[porlean]

I'm also running into this same issue. I upgraded from 3.7.2 to 3.7.4 and I did not change my code. When I went back to 3.7.2 everything worked fine with my untouched code.

[garrybrook]

Same here and still looking but not having much joy. Even tried the next release but am back with the 3.7.2 with absolutely no issues and not a single change to my code which has been running for over a year. Please let me know if you resolve the issue. Garry

[garrybrook]

Hi,
I apologize for bothering you.
I am a home hobbiest and not a professional programmer and working on a home hydroponics controller.
Most of what you are saying goes over my head. According to the Arduino IDE all the libraries are up to date otherwise.

I will continue to look elsewhere for help. Thank you for your time.
Garry

[mathieucarbou]

@porlean @garrybrook : upload your project on github and give us the link so that we can reproduce!
Right now there is nothing we can do except telling you to put the right compilation flags, which I am sure this is about.
If you use Arduino IDE, please try with PIO, to confirme the above.

Exampe of projetc file:

[platformio]
name = MyAwesomeApp
default_envs = esp32dev

[env]
platform = https://github.com/pioarduino/platform-espressif32/releases/download/54.03.20/platform-espressif32.zip
framework = arduino
lib_compat_mode = strict
lib_ldf_mode = chain
lib_deps =
  ESP32Async/AsyncTCP @ 3.3.8
  ESP32Async/ESPAsyncWebServer @ 3.7.6
build_flags =
  -Wall -Wextra
  -std=c++17
  -std=gnu++17
build_unflags =
    -std=gnu++11

monitor_filters = esp32_exception_decoder, log2file
monitor_speed = 115200
upload_protocol = esptool

[env:esp32dev]
board = esp32dev

[HARIS4820]

Error after update 3.7.4

/home/hari/Arduino/libraries/ESP_Async_WebServer/src/ESPAsyncWebServer.h: In member function 'tcp_state AsyncWebServer::state() const':
/home/hari/Arduino/libraries/ESP_Async_WebServer/src/ESPAsyncWebServer.h:1107:49: error: passing 'const AsyncServer' as 'this' argument discards qualifiers [-fpermissive]
1107 | return static_cast<tcp_state>(_server.status());

[mathieucarbou]

@HARIS4820 : it means you have an old version of AsyncTCP. Go in your AsyncTCP header and verify its version, and also that status() is const (immutable)

[mathieucarbou]

@garrybrook @HARIS4820 @porlean : please see #142 (duplicate) - you might have the same issue...

[garrybrook]

name=AsyncTCP
version=1.1.4
author=dvarrel
maintainer=dvarrel
sentence=Async TCP Library for ESP32. Forked from https://github.com/me-no-dev/AsyncTCP
paragraph=to build a WebServer, with files saved in flash
category=Communication
url=https://github.com/dvarrel/AsyncTCP
architectures=esp32

[mathieucarbou]

name=AsyncTCP

version=1.1.4

author=dvarrel

maintainer=dvarrel

sentence=Async TCP Library for ESP32. Forked from https://github.com/me-no-dev/AsyncTCP

paragraph=to build a WebServer, with files saved in flash

category=Communication

url=https://github.com/dvarrel/AsyncTCP

architectures=esp32

This lib is old. Do not use it.

[garrybrook]

So what is the latest?
Arduino IDE seems to think it is the latest??????

[mathieucarbou]

So what is the latest? Arduino IDE seems to think it is the latest??????

To find the latest versions, you can go to the release page of each library., and add a watch for new releases.
See the list at: https://github.com/ESP32Async.

Arduino IDE let's you manually install libraries.

Don't rely on Arduino library manager (#142). It is not good enough to ensure you get the latest version of the right library. The way it works, it is inherently broken.

[mathieucarbou]

Otherwise if you really want to rely on it, just make sure you have teh right name and author:

[garrybrook]

Yeah!!!!
Fixed with the different Async TCP

Thank you