[browser][coreCLR] runtime pack #121174
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[browser][coreCLR] runtime pack #121174
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pavelsavara
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arch-wasm
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Pull Request Overview
This PR adds CoreCLR WASM support to the runtime build system. The changes enable building CoreCLR for browser targets alongside the existing Mono support.
- Adds
CORERUN_LIBS_ONLYconditional gates to prevent installing runtime-specific native libraries to the sharedFramework when building for test scenarios - Includes CoreCLR WASM-specific native files in the platform manifest for browser targets
- Disables crossgen/R2R for browser/WASI targets and implements a copy-only strategy for CoreLib
- Updates the default CoreCLR subset for browser targets to include
clr.nativecorelib - Modifies CI pipeline to build packs in addition to clr+libs for WASM
Reviewed Changes
Copilot reviewed 9 out of 9 changed files in this pull request and generated 1 comment.
Show a summary per file
| File | Description |
|---|---|
| src/native/libs/System.Native/CMakeLists.txt | Adds CORERUN_LIBS_ONLY guards around install commands for System.Native-Static and TimeZoneData libraries |
| src/native/libs/System.Native.Browser/CMakeLists.txt | Adds CORERUN_LIBS_ONLY guard around install command for System.Native.Browser-Static |
| src/native/libs/System.Globalization.Native/CMakeLists.txt | Adds CORERUN_LIBS_ONLY guards around install commands for globalization libraries and ICU files |
| src/native/libs/Common/JavaScript/CMakeLists.txt | Adds CORERUN_LIBS_ONLY guard around install commands for JavaScript rollup outputs |
| src/installer/pkg/sfx/Microsoft.NETCore.App/Microsoft.NETCore.App.Runtime.CoreCLR.sfxproj | Disables PublishReadyToRun for browser and wasi targets |
| src/installer/pkg/sfx/Microsoft.NETCore.App/Directory.Build.props | Adds CoreCLR WASM-specific native library files to platform manifest entries |
| src/coreclr/crossgen-corelib.proj | Adds browser-specific target that copies CoreLib instead of running crossgen |
| eng/pipelines/runtime.yml | Updates browser_wasm build to include packs subset |
| eng/Subsets.props | Adds clr.nativecorelib to default CoreCLR subsets for browser targets |
src/installer/pkg/sfx/Microsoft.NETCore.App/Microsoft.NETCore.App.Runtime.CoreCLR.sfxproj
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Co-authored-by: Copilot <[email protected]>
radekdoulik
reviewed
Nov 4, 2025
radekdoulik
approved these changes
Nov 4, 2025
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how can I built the coreclr browser.wasm package, there are error on my local build. |
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clr.nativecorelibthat just copiesSystem.Private.CoreLib.dllto expected placePlatformManifestFileEntryfor new librariesPublishReadyToRununtil [User Story] RyuJIT for WebAssembly (Wasm) #121141sharedFrameworkonly innativecmake root. Otherwise those fromcoreclrtree are duplicates when we create runtime pack.Fixes #120206