[6.2][Option] Add a feature flag for -Isystem #81968

ian-twilightcoder · 2025-06-04T05:53:26Z

Explanation: This change adds a feature flag for swift-build to detect -Isystem support.
Scope: New feature flag for an already implemented feature.
Original PRs: [Option] Add a feature flag for -Isystem #81964
Risk: None anticipated.
Testing: CI, tested in coordination with 🍒 Test the Isystem flag before using -Isystem swift-build#555

swift-build needs a flag to know if -Isystem is available. rdar://152540225

ian-twilightcoder · 2025-06-04T05:53:37Z

[6.2][Option] Add a feature flag for -Isystem

8b165a1

swift-build needs a flag to know if -Isystem is available. rdar://152540225

ian-twilightcoder requested a review from a team as a code owner June 4, 2025 05:53

ian-twilightcoder enabled auto-merge June 4, 2025 05:53

owenv approved these changes Jun 4, 2025

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DougGregor approved these changes Jun 4, 2025

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ian-twilightcoder merged commit 1c1177e into swiftlang:release/6.2 Jun 4, 2025
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ian-twilightcoder deleted the Isystem-feature-flag_6.2 branch June 5, 2025 00:10

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