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@planetmarshall planetmarshall commented Oct 7, 2025

Disable metal support when cross compiling from mac to linux targets, othewise build script generation fails.

Closes #176637

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It looks like this pull request may not have tests. Please make sure to add tests or get an explicit test exemption before merging.

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@github-actions github-actions bot added the engine flutter/engine related. See also e: labels. label Oct 7, 2025
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Code Review

This pull request correctly disables Metal support when cross-compiling from macOS to Linux by updating the condition in the gn build script. This prevents build failures. I have one minor suggestion to align with Python best practices.

gn_args['skia_use_gl'] = args.target_os != 'fuchsia'

if sys.platform == 'darwin' and args.target_os not in ['android', 'fuchsia']:
if sys.platform == 'darwin' and args.target_os not in ['android', 'fuchsia', 'linux']:
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medium

For better adherence to Python best practices and the Google Python Style Guide, it's recommended to use a tuple for a fixed collection of items instead of a list. Tuples are immutable and are generally preferred for sequences that are not expected to change.1

Suggested change
if sys.platform == 'darwin' and args.target_os not in ['android', 'fuchsia', 'linux']:
if sys.platform == 'darwin' and args.target_os not in ('android', 'fuchsia', 'linux'):

Style Guide References

Footnotes

  1. Python code should follow the Google Python Style Guide, which recommends using tuples for immutable sequences. (link)

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I opted to not diverge from the existing conventions in the source file. I can update if required.

@planetmarshall planetmarshall force-pushed the macos-cross-disable-metal branch from b0a7259 to 60a02b7 Compare October 8, 2025 08:54
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Perhaps this check should be an allow-list for darwin-macos and darwin-ios instead of a deny-list.

@chinmaygarde chinmaygarde added the autosubmit Merge PR when tree becomes green via auto submit App label Oct 20, 2025
@auto-submit auto-submit bot removed the autosubmit Merge PR when tree becomes green via auto submit App label Oct 20, 2025
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auto-submit bot commented Oct 20, 2025

autosubmit label was removed for flutter/flutter/176639, because The base commit of the PR is older than 7 days and can not be merged. Please merge the latest changes from the main into this branch and resubmit the PR.

@chinmaygarde chinmaygarde force-pushed the macos-cross-disable-metal branch from 60a02b7 to 5c40285 Compare October 27, 2025 18:37
@jason-simmons jason-simmons added the autosubmit Merge PR when tree becomes green via auto submit App label Oct 27, 2025
@auto-submit auto-submit bot added this pull request to the merge queue Oct 27, 2025
Merged via the queue into flutter:master with commit eb713a5 Oct 27, 2025
184 of 185 checks passed
@flutter-dashboard flutter-dashboard bot removed the autosubmit Merge PR when tree becomes green via auto submit App label Oct 27, 2025
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Oct 28, 2025
auto-submit bot pushed a commit to flutter/packages that referenced this pull request Oct 28, 2025
flutter/flutter@4c91098...7cf0dc1

2025-10-28 [email protected] Roll Skia from 602bbd4af8f9 to e4d3d8f31aef (4 revisions) (flutter/flutter#177647)
2025-10-28 [email protected] Fix AppBar Semantics namesRoute for mismatched platforms (flutter/flutter#176694)
2025-10-28 [email protected] Fix Popup menu Semantics label for mismatched platforms (flutter/flutter#177049)
2025-10-28 [email protected] Roll Skia from 8b2d056701df to 602bbd4af8f9 (1 revision) (flutter/flutter#177628)
2025-10-28 [email protected] Roll Skia from 5723f87f8530 to 8b2d056701df (3 revisions) (flutter/flutter#177626)
2025-10-27 [email protected] Roll Skia from 170c11f1ddc5 to 5723f87f8530 (6 revisions) (flutter/flutter#177618)
2025-10-27 [email protected] Enhance DropdownMenuEntry's labelWidget docs (flutter/flutter#177160)
2025-10-27 [email protected] Regenerated lockfiles for New Template Values (flutter/flutter#177617)
2025-10-27 [email protected] Correct editable text and placeholder position in baseline aligned stack (flutter/flutter#177342)
2025-10-27 49699333+dependabot[bot]@users.noreply.github.com Bump actions/upload-artifact from 4 to 5 in the all-github-actions group (flutter/flutter#177620)
2025-10-27 [email protected] add gn flag to optimize builds for size (flutter/flutter#176835)
2025-10-27 [email protected] disable metal for crosscompile from mac to linux (flutter/flutter#176639)
2025-10-27 [email protected] [DDM] enable host builds in the merge queue (flutter/flutter#177446)
2025-10-27 [email protected] Disable vulkan X11 support when building for minimal linux (flutter/flutter#176697)
2025-10-27 [email protected] Roll Skia from 77348c40d101 to 170c11f1ddc5 (6 revisions) (flutter/flutter#177602)
2025-10-27 [email protected] Set the font weight variation axis based on the text style's FontWeight (flutter/flutter#175771)
2025-10-27 [email protected] Fixed `RuntimeEffect` with `ImageFilter.compose` (flutter/flutter#177510)
2025-10-27 98614782+auto-submit[bot]@users.noreply.github.com Reverts "Clean before building when framework headers change (#177512)" (flutter/flutter#177610)
2025-10-27 [email protected] [skia] Disable legacy png encoding/decoding in skp (flutter/flutter#177462)
2025-10-27 [email protected] Clean before building when framework headers change (flutter/flutter#177512)
2025-10-27 [email protected] Roll dartdoc to 9.0.0 (flutter/flutter#177590)
2025-10-27 [email protected] Fix typo in comment about `manifestFile` in `DeepLinkJsonFromManifestTaskHelper.kt‎` (flutter/flutter#177538)
2025-10-27 [email protected] Fix RoundedSuperellipse crashes for tiny corners (flutter/flutter#177070)
2025-10-27 [email protected] Roll Packages from 53d6138 to bbf96a0 (7 revisions) (flutter/flutter#177588)
2025-10-27 [email protected] Fix missing list indicators in CHANGELOG.md (flutter/flutter#177484)
2025-10-27 [email protected] [ Tool ] Add `Stream.transformWithCallSite` to provide more useful stack traces (flutter/flutter#177470)
2025-10-27 [email protected] Roll Skia from 06243224ecf0 to 77348c40d101 (1 revision) (flutter/flutter#177585)
2025-10-27 [email protected] Add guided error for precompiled cache error (flutter/flutter#177327)
2025-10-27 [email protected] Roll Fuchsia Linux SDK from tKrvmvTOQITL81oOC... to ir6J2isKAYa1jNLyJ... (flutter/flutter#177578)
2025-10-27 [email protected] Roll Skia from 784ed1787bd6 to 06243224ecf0 (1 revision) (flutter/flutter#177575)
2025-10-27 [email protected] Roll Skia from de52b3a7585a to 784ed1787bd6 (5 revisions) (flutter/flutter#177571)

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flutter-zl pushed a commit that referenced this pull request Oct 31, 2025
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Disable metal support when cross compiling from mac to linux targets,
othewise build script generation fails.

Closes #176637

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
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reidbaker pushed a commit to AbdeMohlbi/flutter that referenced this pull request Dec 10, 2025
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Disable metal support when cross compiling from mac to linux targets,
othewise build script generation fails.

Closes flutter#176637

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.

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Build script generation for cross compilation from macos to linux fails

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