I have learned that this is a problem with esp3c5 & esp32c6.
I have moved on to an esp32c3 and the build is without errors.
So, now the adventure begins...

ESP @fhrbata reply to Issue #18133

The problem is caused by the esp_system component’s use of the idf_component_optional_requires function ...

I have copied the example code and it failed to build. Latest IDF, target is esp32c6, Linux.
https://github.com/espressif/esp-idf/tree/master/tools/test_build_system/buildv2_test_app

I then make it as simple as possible (removed KConfig.projbuild) and it still failed. See Note below.
I have opened ...

Looking forward to the new Build System V2.
I could not find any updated Example Code using V2.
Please point to any examples or if none exist, I will open an issue requesting some V1 examples to be written with V2.

Burtrum

Looks so good.

https://www.cnx-software.com/2023/01/06 ... ontroller/

With 3rd 40 MHz RISC-V LP Core
No wireless. With Ethernet.

Burtrum

How about next 'module' ?

A built-in 32KHz crystal.
I don't want to design a board to experiment with RTC options.

Burtrum

https://www.edx.org/
LFD112x: Building Applications with RISC-V and FreeRTOS.
https://learning.edx.org/course/course- ... T2022/home

The first chapters are very high level, nothing new to me.
But the rest was interesting.

YMMV,
Burtrum

Hi
I’ve just started looking at the exact opposite problem: the same app on ESP32 variants. I have ESP32, ESP32C3 and ESP32S2.

I think this is the Espressif example to look it.

https://github.com/espressif/esp-idf/tree/master/examples/build_system/cmake/multi_config

Separate build directories ...

FYI Same SHA-256 boot warning on Lilygo TTGO T-01 esp32c3.

This was with Nuttx and ESP boot binaries. Not Arduino. All with the latest tools.

Multiple flase erase and reprogram no change. But seems to boot OK.

Burtrum

Great job from low code to high level programming. Plus HW PCB. I am impressed.

Burtrum
github.com/burtrum

I used 'curl' (incorrectly to download the bin files and ended up with 150K worth the http and other text.
I just used 'wget' and everything flashed OK.

So apparently making progress with Nuttx, so far I like it.

sorry for the false alarm.

Burtrum