Windows: migrate to experimental SDK, stabilize toolchain, and remove legacy SDK #84797

compnerd · 2025-10-09T21:24:24Z

This set of changes:

removes the "legacy SDK" builds
renames the experimental SDK to the standard SDK names
updates the pinned toolchain to build against
builds the toolchain against the pinned toolchain
ingests the MSM from the pinned toolchain to run the toolchain against the built runtime
Removes the Android and Windows runtime caches

compnerd · 2025-10-09T21:26:54Z

Please test with following PRs:
swiftlang/swift-installer-scripts#470

@swift-ci please build toolchain Windows platform

compnerd · 2025-10-09T21:26:59Z

@swift-ci please smoke test

compnerd · 2025-10-10T01:18:30Z

Please test with following PRs:
swiftlang/swift-installer-scripts#470

@swift-ci please build toolchain Windows platform

compnerd · 2025-10-10T05:14:41Z

Please test with following PRs:
swiftlang/swift-installer-scripts#470

@swift-ci please build toolchain Windows platform

compnerd · 2025-10-10T15:13:52Z

Please test with following PRs:
swiftlang/swift-installer-scripts#470

@swift-ci please build toolchain Windows platform

compnerd · 2025-10-11T06:29:41Z

Please test with following PRs:
swiftlang/swift-installer-scripts#470

@swift-ci please build toolchain Windows platform

compnerd · 2025-10-12T05:39:52Z

Please test with following PRs:
swiftlang/swift-installer-scripts#470

@swift-ci please build toolchain Windows platform

compnerd · 2025-10-14T17:39:23Z

Please test with following PRs:
swiftlang/swift-installer-scripts#470

@swift-ci please build toolchain Windows platform

compnerd · 2025-10-16T15:47:30Z

Please test with following PRs:
swiftlang/swift-installer-scripts#470

@swift-ci please build toolchain Windows platform

compnerd · 2025-10-16T23:41:38Z

Please test with following PRs:
swiftlang/swift-installer-scripts#470

@swift-ci please build toolchain Windows platform

compnerd · 2025-10-18T00:25:06Z

Please test with following PRs:
swiftlang/swift-installer-scripts#470

@swift-ci please build toolchain Windows platform

compnerd · 2025-10-20T22:37:44Z

Please test with following PRs:
swiftlang/swift-installer-scripts#470

@swift-ci please build toolchain Windows platform

compnerd · 2025-10-23T05:14:56Z

Please test with following PRs:
swiftlang/swift-installer-scripts#470

@swift-ci please build toolchain Windows platform

compnerd · 2025-10-31T00:34:06Z

Please test with following PRs:
swiftlang/swift-installer-scripts#470

@swift-ci please build toolchain Windows platform

compnerd · 2025-10-31T04:52:44Z

Please test with following PRs:
swiftlang/swift-installer-scripts#470
swiftlang/swift-docc-symbolkit#70
swiftlang/swift-docc#818

@swift-ci please build toolchain Windows platform

compnerd · 2025-11-04T23:09:25Z

Please test with following PRs:
swiftlang/swift-installer-scripts#470

@swift-ci please build toolchain Windows platform

compnerd · 2025-11-05T05:55:47Z

Please test with following PRs:
swiftlang/swift-installer-scripts#470

@swift-ci please build toolchain Windows platform

Use the experimental SDK to build the toolchain and consume the redistributable. This is going to ensure that we build the entire toolchain against a stable point and run against the runtime that we build against.

Adjust the toolchain build to use the pinned toolchain rather than the built toolchain. This is particularly important with the lack of ABI stability on Windows. We now uniformly build the toolchain with the same runtime. This extricates the SDK from the toolchain build. Now that we build the toolchain properly against a SxS installable version of the runtime, we can consume the runtime that we built against and inject that into the toolchain image. This avoids the need to rely on trying to maintain ABI compatibility in an ABI unstable environment.

Drop the support for the legacy build system for the runtime. This reduces the complexity in the build script as well as helps reduce the overall build times.

Build the complete toolchain before we build the SDK. This delays a certain class of errors, however, the resulting build order is much easier to reason about.

This prepares the swift-driver building on Windows. By statically linking the runtime and its dependencies, this will allow us to avoid the runtime shuffling that is required to get the runtime required to get the swift-driver working.

Enable the use of the early swift-driver to build the Swift toolchain. This is the first step towards removing the accumulated debt and workarounds when building the toolchain on Windows.

compnerd · 2025-11-05T16:32:00Z

Please test with following PRs:
swiftlang/swift-installer-scripts#470

@swift-ci please build toolchain Windows platform

…ntal SDK

compnerd · 2025-11-05T21:02:08Z

Please test with following PRs:
swiftlang/swift-installer-scripts#470

@swift-ci please build toolchain Windows platform

compnerd · 2025-11-06T00:54:58Z

Please test with following PRs:
swiftlang/swift-installer-scripts#470

@swift-ci please build toolchain Windows platform

compnerd · 2025-11-06T06:15:43Z

Please test with following PRs:
swiftlang/swift-installer-scripts#470

@swift-ci please build toolchain Windows platform

compnerd force-pushed the legacy-no-more branch from fafc9ad to 1edbb62 Compare October 10, 2025 01:18

compnerd force-pushed the legacy-no-more branch from a24766f to f825a55 Compare October 10, 2025 15:13

compnerd force-pushed the legacy-no-more branch from f825a55 to 4e18a3d Compare October 12, 2025 05:39

compnerd force-pushed the legacy-no-more branch from 4e18a3d to 71ed808 Compare October 14, 2025 17:28

compnerd force-pushed the legacy-no-more branch from 71ed808 to 9341f36 Compare October 16, 2025 15:47

compnerd force-pushed the legacy-no-more branch from 41d370a to cfdd5e0 Compare October 18, 2025 00:24

compnerd force-pushed the legacy-no-more branch from cfdd5e0 to b2fb6f5 Compare October 23, 2025 15:16

compnerd force-pushed the legacy-no-more branch from b2fb6f5 to 8478355 Compare October 31, 2025 00:33

compnerd force-pushed the legacy-no-more branch from 8478355 to 58e2742 Compare November 4, 2025 18:14

compnerd added 4 commits November 5, 2025 08:28

utils: update toolchain snapshot to permit use of the experimental SDK

e79e78d

Use the experimental SDK to build the toolchain and consume the redistributable. This is going to ensure that we build the entire toolchain against a stable point and run against the runtime that we build against.

build.ps1: remove support the legacy SDK

1fb4efe

Drop the support for the legacy build system for the runtime. This reduces the complexity in the build script as well as helps reduce the overall build times.

build.ps1: shuffle build order

337892d

Build the complete toolchain before we build the SDK. This delays a certain class of errors, however, the resulting build order is much easier to reason about.

compnerd added 2 commits November 5, 2025 08:29

utils: build early swift-driver on Windows

573a019

This prepares the swift-driver building on Windows. By statically linking the runtime and its dependencies, this will allow us to avoid the runtime shuffling that is required to get the runtime required to get the swift-driver working.

utils: enable the early swift-driver for Windows

c40d883

Enable the use of the early swift-driver to build the Swift toolchain. This is the first step towards removing the accumulated debt and workarounds when building the toolchain on Windows.

compnerd force-pushed the legacy-no-more branch from 58e2742 to c40d883 Compare November 5, 2025 16:30

fixup! utils: update toolchain snapshot to permit use of the experime…

10ddf07

…ntal SDK

Windows: migrate to experimental SDK, stabilize toolchain, and remove legacy SDK #84797

Are you sure you want to change the base?

Windows: migrate to experimental SDK, stabilize toolchain, and remove legacy SDK #84797

Conversation

compnerd commented Oct 9, 2025 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

compnerd commented Oct 9, 2025

Uh oh!

compnerd commented Oct 9, 2025

Uh oh!

compnerd commented Oct 10, 2025

Uh oh!

compnerd commented Oct 10, 2025

Uh oh!

compnerd commented Oct 10, 2025

Uh oh!

compnerd commented Oct 11, 2025

Uh oh!

compnerd commented Oct 12, 2025

Uh oh!

compnerd commented Oct 14, 2025

Uh oh!

compnerd commented Oct 16, 2025

Uh oh!

compnerd commented Oct 16, 2025

Uh oh!

compnerd commented Oct 18, 2025

Uh oh!

compnerd commented Oct 20, 2025

Uh oh!

compnerd commented Oct 23, 2025

Uh oh!

compnerd commented Oct 31, 2025

Uh oh!

compnerd commented Oct 31, 2025

Uh oh!

compnerd commented Nov 4, 2025

Uh oh!

compnerd commented Nov 5, 2025

Uh oh!

compnerd commented Nov 5, 2025

Uh oh!

compnerd commented Nov 5, 2025

Uh oh!

compnerd commented Nov 6, 2025

Uh oh!

compnerd commented Nov 6, 2025

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

1 participant

compnerd commented Oct 9, 2025 •

edited

Loading