[WiPy 2.0] Pycom-esp-idf example error: undifined reference to 'mp_thread_clean'

[Innocenzo]

Hi to everyone,

I try to execute the examples in folder pycom-esp-idf (get-started -> hello world) following this guide:
https://github.com/pycom/pycom-esp-idf

After the command (where I do not change any options):

make menuconfig

try to execute:

make all

but I receive the following error meassage:

fatal: No names found, cannot describe anything.
fatal: No names found, cannot describe anything.
LD hello-world.elf
/home/aeromechs/pycom-esp-idf/examples/get-started/hello_world/build/freertos/libfreertos.a(tasks.o):(.literal.prvDeleteTCB+0x10): undefined reference to `mp_thread_clean'
/home/aeromechs/pycom-esp-idf/examples/get-started/hello_world/build/freertos/libfreertos.a(tasks.o): In function `prvDeleteTCB':
/home/aeromechs/pycom-esp-idf/components/freertos/./tasks.c:4421: undefined reference to `mp_thread_clean'
collect2: error: ld returned 1 exit status
/home/aeromechs/pycom-esp-idf/make/project.mk:322: set di istruzioni per l'obiettivo "/home/aeromechs/pycom-esp-idf/examples/get-started/hello_world/build/hello-world.elf" non riuscito
make: *** [/home/aeromechs/pycom-esp-idf/examples/get-started/hello_world/build/hello-world.elf] Errore 1

Any suggests?

Thx

[jmarcelino]

@Innocenzo
The pycom-esp-idf is a special modified version to support the MicroPython build from Pycom.

If you want to use the C APIs use the official ESP-IDF from https://github.com/espressif/esp-idf (which is also more up to date)

[Innocenzo]

@jmarcelino Thanks a lot.

But if I use this repository how many changes I must do in order to use it for my Wipy?

[jmarcelino]

@Innocenzo
No changes required! :-) You can use the WiPy as a fully compatible ESP32 device.

[Innocenzo]

@jmarcelino This is a good news :D

Anyway the error persist also using this repository.

[jmarcelino]

@Innocenzo
Sounds like you need to point IDF_PATH environment variable to the new ESP-IDF folder.

export IDF_PATH=/path/to/your/new/esp-idf should do it

[Innocenzo]

@jmarcelino Ok it works with the new repository!

But there isn't a way to resolve the problem in the pycom-esp-idf repository?

EDIT: There is a function in pycom-esp-idf/components/freertos/task.c called portCLEAN_UP_TCB( pxTCB ); that causes the problem. I've deleted it and everything works.

I don't think that is a good solution.

[jmarcelino]

@Innocenzo
Great! Well the "problem" is Pycom-esp-idf expects MicroPython to be present (the mp_ prefix you see in the error). It was forked and adapted for it.

i can't see any other useful purpose to use it instead of the official ESP-IDF repo.

[salvoaerodev]

The Hello World example, included in the pycom-esp-idf misses the TCB cleanup function, just defined in FreeRTOS config file. Add it in the .c file, and recompile it. It should works in this way.

[salvoaerodev]

The function to add is

/* Missing function */
void mp_thread_clean (void *tcb) {

}

in the hello_world_main.c

[Innocenzo]

@salvoaerodev well done.

[jmarcelino]

@Innocenzo @salvoaerodev
The function is defined in pycom-micropython-sigfox/esp32/mpthreadport.c

It's interesting it worked by just copying it over but I still don't see why you'd want to compile your C programs using pycom-esp-idf when the official ESP-IDF repo at https://github.com/espressif/esp-idf:

• works with the Pycom boards
• is much more up-to-date
• matches the ESP-IDF documentation at http://esp-idf.readthedocs.io/en/latest/
• Gives you support via the official esp32.com forums

Is there a reason I'm missing?

[Innocenzo]

@jmarcelino Because we want preserve the Pycom WiPy firmware ad edit it with some frozen files and custom API C (like SSL and BT that have some problems).