Fix the nRF builds with GCC 11.2

[tannewt]

See adafruit/Adafruit_nRF52_Bootloader#221
for background on the flag.

[jerryneedell]

Are you using GCC 11.2 now?

[tannewt]

I'm starting to locally. The CI is 10.3 still.

[jerryneedell]

Good to know. Thanks. I'll give it a try and try creating a Raspberry pi build.

[rdoursenaud]

Confirmed working here on a Feather nRF52840 Express.
Lost USB connectivity without the patch.

[dhalbert]

lgtm

[jerryneedell]

AH -- I see that 11.2 has not been released on the arm developers site yet https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-rm/downloads -- will we be officially staying at 10.3 until it is available there?

Actually, Isn't CI (and the build guide still using 10.2.1 from https://developer.arm.com/-/media/Files/downloads/gnu-rm/10-2020q4/gcc-arm-none-eabi-10-2020-q4-major-x86_64-linux.tar.bz2?revision=ca0cbf9c-9de2-491c-ac48-898b5bbc0443&la=en&hash=68760A8AE66026BCF99F05AC017A6A50C6FD832A ?

[rdoursenaud]

@jerryneedell GCC 11.2 has been released upstream and is already in Arch.

The CI is indeed still 10.2.1:

circuitpython/.github/workflows/build.yml

Line 246 in 09859a6

wget --no-verbose https://adafruit-circuit-python.s3.amazonaws.com/gcc-arm-none-eabi-10-2020-q4-major-x86_64-linux.tar.bz2

[dhalbert]

We stick with the official ARM downloads for wide availability reasons: most people are not using Arch. We haven't yet upgraded to 10.3-2021.07, which ARM released in July, because the changes were not relevant to us, but probably will upgrade to that after 7.0.0 final. I would expect the ARM release to go to 11.x in December or January.

Someone should report the 11.2 issue to Nordic in DevZone to give them a heads up. It could be me, but I don't have a good understanding of the issue yet.