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Revive ARMv6 support #34874

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Closed
5 tasks
zanderso opened this issue Oct 19, 2018 · 4 comments
Closed
5 tasks

Revive ARMv6 support #34874

zanderso opened this issue Oct 19, 2018 · 4 comments
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area-infrastructure Use area-infrastructure for SDK infrastructure issues, like continuous integration bot changes. area-vm Use area-vm for VM related issues, including code coverage, and the AOT and JIT backends. closed-not-planned Closed as we don't intend to take action on the reported issue customer-flutter type-enhancement A request for a change that isn't a bug

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@zanderso
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zanderso commented Oct 19, 2018 •
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This has several components.

  • Triage and fix simarmv6 test failures
  • Find Linux and Android ARMv6 cross toolchains. Teach gclient sync or gclient runhooks to download them.
  • Add GN toolchain definitions for the ARMv6 toolchains
  • Make sure we're passing all the right flags to the ARMv6 toolchains
  • Obtain ARMv6 hardware (Linux and/or Android), attach to bots, run tests on hardware. This can mirror the ARMv7 setup.
@zanderso zanderso added area-vm Use area-vm for VM related issues, including code coverage, and the AOT and JIT backends. area-infrastructure Use area-infrastructure for SDK infrastructure issues, like continuous integration bot changes. type-enhancement A request for a change that isn't a bug customer-flutter labels Oct 19, 2018
@zanderso
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See: flutter/flutter#22380

@robertmuth
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I would be great if, as a side effect of this, we would end up with an SDK for "Raspian",
the Linux distribution for Raspberry Pi's.
Modern Raspis (2/3 models) are ARMv7 but the Pi Zeros are ARMv6.

To see where things are WRT ARMv6 compatibility, one could build and SDK
on Raspi 3 and then try it out on an Zero

@zanderso
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To see where things are WRT ARMv6 compatibility, one could build and SDK
on Raspi 3 and then try it out on an Zero

By default when targeting 32-bit ARM, the Dart VM compiler definitely generates instructions that require ARMv7, so the SDK that we build that works on ARMv7 is not designed to work on ARMv6.

This process for Raspberry Pi 1 worked at one point in time, and would be a good starting point for future ARMv6 support.

@mit-mit
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mit-mit commented Oct 24, 2018

I would like to reconsider this. Currently Flutter formally only supports ARMv7 and ARM64:
https://flutter.io/faq/#what-devices-and-os-versions-does-flutter-run-on

@zanderso zanderso added the closed-not-planned Closed as we don't intend to take action on the reported issue label Oct 24, 2018
@iapicca iapicca mentioned this issue Apr 24, 2020
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area-infrastructure Use area-infrastructure for SDK infrastructure issues, like continuous integration bot changes. area-vm Use area-vm for VM related issues, including code coverage, and the AOT and JIT backends. closed-not-planned Closed as we don't intend to take action on the reported issue customer-flutter type-enhancement A request for a change that isn't a bug
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