Where to find xtensa-lx106-elf-standalone.tar.gz (Windows)

[ciuly]

Hello,
I am trying to build micropython firmware for my ESP8266 (It's a D1 mini) (because I reached RAM limitations so I want to move some of the libraries I am using into the firmware as I've read that being the solution for this)
I followed the official documentation here https://docs.espressif.com/projects/esp8266-rtos-sdk/en/latest/get-started/windows-setup.html
I tried both 840 and 485 but they both fail with the same error
xtensa-lx106-elf-gcc: error: unrecognized command line option '-mforce-l32'
I'm running make -j BOARD=ESP8266_GENERIC

The micropython official documentation says to download https://github.com/jepler/esp-open-sdk/releases/download/2018-06-10/xtensa-lx106-elf-standalone.tar.gz but that no longer exists. Jepler doesn't seem to have anything with esp in their repositories.
I found a recent discussion on this subject here https://github.com/orgs/micropython/discussions/18182 but the solution posted is for linux apparently

The same micropython doc says to use the NONOS SDK so looking at their official listings https://github.com/espressif/ESP8266_NONOS_SDK/releases but only seeing code release, not compiled binaries (and they're version 3.x, pretty new unsure if they will work)
If I go to their website to download an older one, those downloads are code-only as well https://www.espressif.com/en/products/socs/esp8266ex/resources

So I tried building 154, but it fails (mind you, I've had very little expose to makefile based builds)

MINGW32 /c/code/ESP8266_NONOS_SDK
$ make
make[1]: Entering directory '/c/code/ESP8266_NONOS_SDK/driver_lib'
make[2]: Entering directory '/c/code/ESP8266_NONOS_SDK/driver_lib'
make[2]: *** user: No such file or directory.  Stop.
make[2]: Leaving directory '/c/code/ESP8266_NONOS_SDK/driver_lib'
make[1]: *** [../Makefile:308: .subdirs] Error 2
make[1]: Leaving directory '/c/code/ESP8266_NONOS_SDK/driver_lib'
make: *** [Makefile:308: .subdirs] Error 2

Are there working windows binaries somewhere I can download? And if not, how would I go about building these?

Thanks

[Josverl]

While I am an avid Windows user, I often prefer to build in WSL2 + Docker.
It takes a one-time setup for those and clone MicroPython inside WSL. VSCode makes that rather seamless.
After that I use mpbuild to handle the setup and configuration of all the the different toolchains for me.

[jomasnash]

Just create a free account on https://labs.play-with-docker.com
You can now use a Docker environment for 4 hours (after that you can restart again for 4 hours).

Then in your Docker playground, follow the steps from the micropython website to compile (using Docker) for esp8266.
No need to install any software. You only need a web browser.
So you can do this in Windows, Mac, Chromebook even on your smartphone.

You can get the compiled binary with scp (putty or whatever) or in Docker playground by setting up a simple server with Python.

I just did a test. It cost me about two minutes to get micropython and compile the binary. (from scratch, having already an account).

Sometimes the site seems to be a bit busy so try again later.