🔴 Live TV: dotnet/macios/pull/

rolfbjarne · 2026-02-13T15:11:20Z

Summary

Adds MSBuild support for mergeable libraries by detecting mergeable framework/dylib metadata and stripping it when requested during native reference processing.

This includes:

a new StripMergeableLibraries build property
a StripMergeableLibraryMetadata task wired into native reference handling
Mach-O support for detecting mergeable-library atom info
tests for mergeable frameworks and dylibs across Apple platforms
documentation for the new build property

Testing

Added unit/task coverage for mergeable library stripping behavior.
Added pack/project test coverage for mergeable framework and dylib references.

Fixes #20262.

Add support for detecting and stripping mergeable library metadata (LC_ATOM_INFO) from frameworks embedded in app bundles. Mergeable libraries are dylibs/frameworks built with -make_mergeable that contain extra static linking metadata, roughly doubling their size. When used as dynamic libraries, this metadata is unnecessary. Changes: - Add LC_ATOM_INFO (0x36) to LoadCommands enum in MachO.cs - Add HasAtomInfo property and IsMergeableLibrary() method for detection - Add -no_atom_info flag to SymbolStrip task when stripping frameworks - Add tests for detection and stripping of mergeable libraries Fixes #20262

Add a new StripMergeableLibraries MSBuild property that controls whether LC_ATOM_INFO (mergeable library metadata) is stripped from frameworks during symbol stripping. The property defaults to the value of Optimize, so Release builds strip the metadata (reducing app size) while Debug builds preserve it. Changes: - SymbolStrip task: add StripMergeableLibraries property, conditionally pass -no_atom_info to strip. - Xamarin.Shared.props: define StripMergeableLibraries defaulting to Optimize. - Xamarin.Shared.targets: pass StripMergeableLibraries to SymbolStrip. - test-libraries: add XMergeableTest framework built with -Wl,-make_mergeable, including plists for all RIDs. - NativeMergeableFrameworkReferencesApp: test app that references the mergeable framework. - ProjectTest.cs: add test cases for building the mergeable framework app and verifying atom info stripping behavior. - MergeableLibraryTests.cs: add test for preserving atom info when StripMergeableLibraries is false.

Add a binding project that embeds the XMergeableTest mergeable framework, with pack tests verifying the nupkg contains the framework correctly. - bindings-framework-test/dotnet-mergeable: binding project referencing XMergeableTest.framework with IsBindingProject=true. - PackTest.cs: BindingMergeableFrameworksProject test verifying dotnet pack produces correct nupkg structure with the mergeable framework. - ProjectTest.cs: BuildNativeMergeableFrameworkReferencesApp_AtomInfoStripping test verifying atom info is stripped when Optimize=true and preserved when Optimize=false.

Add a new StripMergeableLibraryMetadata MSBuild task and target that strips LC_ATOM_INFO from frameworks in the app bundle. This runs independently of the regular symbol stripping (_NativeStripFiles), which is disabled for simulator builds, debug builds, and macOS/MacCatalyst. The new task: - Scans the app bundle's Frameworks directory for .framework directories - Checks each framework executable with MachO.IsMergeableLibrary() - Only strips frameworks that actually have LC_ATOM_INFO - Runs strip -no_atom_info on matching frameworks This ensures mergeable library metadata is stripped when StripMergeableLibraries=true (i.e. Optimize=true), regardless of whether NoSymbolStrip is enabled.

- Remove RuntimeIdentifier from NativeMergeableFrameworkReferencesApp platform projects (default values are chosen automatically). - Add NativeMergeableDylibReferencesApp test app referencing a standalone mergeable dylib (libMergeableFramework.dylib). - Add libMergeableFramework.dylib build rule in test-libraries Makefile. - Extend StripMergeableLibraryMetadata task to also scan dylib directories (e.g. MonoBundle) for mergeable libraries. - Add BuildNativeMergeableDylibReferencesApp_AtomInfoStripping test verifying dylib atom info stripping behavior. All 8 integration tests and 10 unit tests pass.

…braries

Hash each absolute library path before creating its incremental stamp file. This keeps stamp names deterministic and unique without exceeding the filesystem's per-component length limit for deeply nested app bundles. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

…braries

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: 35b9fddd-0b2f-4427-9990-90225546e53a

vs-mobiletools-engineering-service2 · 2026-09-08T16:40:05Z

✅ API diff for current PR / commit

NET (empty diffs)

iOS: vsdrops gist ( No breaking changes )
tvOS: vsdrops gist ( No breaking changes )
MacCatalyst: vsdrops gist ( No breaking changes )
macOS: vsdrops gist ( No breaking changes )

✅ API diff vs stable

NET (empty diffs)

iOS: vsdrops gist ( No breaking changes )
tvOS: vsdrops gist ( No breaking changes )
MacCatalyst: vsdrops gist ( No breaking changes )
macOS: vsdrops gist ( No breaking changes )

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Generator Diff: vsdrops (html) vsdrops (raw diff) gist (raw diff) - Please review changes)

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Hash: 1b2afec17a6d00607843a89f66efa21add10eef3 [PR build]

vs-mobiletools-engineering-service2 · 2026-09-09T17:44:10Z

🚀 [CI Build #1b2afec] Test results 🚀

Test results

✅ All tests passed on VSTS: test results.

🎉 All 264 tests passed 🎉

Tests counts

✅ assembly-processing: All 1 tests passed. Html Report (VSDrops) Download
✅ cecil: All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (iOS): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (MacCatalyst): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (macOS): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (Multiple platforms): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (tvOS): All 1 tests passed. Html Report (VSDrops) Download
✅ framework: All 2 tests passed. Html Report (VSDrops) Download
✅ fsharp: All 4 tests passed. Html Report (VSDrops) Download
✅ generator: All 5 tests passed. Html Report (VSDrops) Download
✅ interdependent-binding-projects: All 4 tests passed. Html Report (VSDrops) Download
✅ introspection: All 7 tests passed. Html Report (VSDrops) Download
✅ linker (iOS): All 31 tests passed. Html Report (VSDrops) Download
✅ linker (MacCatalyst): All 31 tests passed. Html Report (VSDrops) Download
✅ linker (macOS): All 21 tests passed. Html Report (VSDrops) Download
✅ linker (tvOS): All 31 tests passed. Html Report (VSDrops) Download
✅ monotouch (iOS): All 25 tests passed. [attempt 3] Html Report (VSDrops) Download
✅ monotouch (MacCatalyst): All 25 tests passed. Html Report (VSDrops) Download
✅ monotouch (macOS): All 20 tests passed. Html Report (VSDrops) Download
✅ monotouch (tvOS): All 25 tests passed. Html Report (VSDrops) Download
✅ msbuild: All 2 tests passed. Html Report (VSDrops) Download
✅ sharpie: All 1 tests passed. Html Report (VSDrops) Download
✅ windows: All 3 tests passed. Html Report (VSDrops) Download
✅ xcframework: All 4 tests passed. Html Report (VSDrops) Download
✅ xtro: All 1 tests passed. Html Report (VSDrops) Download

macOS tests

✅ Tests on macOS Sonoma (14): All 5 tests passed. Html Report (VSDrops) Download
✅ Tests on macOS Sequoia (15): All 5 tests passed. Html Report (VSDrops) Download
✅ Tests on macOS Tahoe (26): All 5 tests passed. [attempt 2] Html Report (VSDrops) Download

Linux Build Verification

✅ Linux build succeeded

Pipeline on Agent
Hash: 1b2afec17a6d00607843a89f66efa21add10eef3 [PR build]

rolfbjarne and others added 4 commits February 12, 2026 17:25

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