mcp-swift-sdk – Build Information

Build Information

Failed to build mcp-swift-sdk, reference 0.12.1 (a0ae21), with Swift 6.4 for Android on 25 Sep 2026 02:30:43 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-53886770-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/saguaro1/spi-images:android-6.4-latest swift build --swift-sdk aarch64-unknown-linux-android28 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 5.1.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/modelcontextprotocol/swift-sdk.git
Reference: 0.12.1
Initialized empty Git repository in /host/spi-builder-workspace/.git/
hint: Using 'master' as the name for the initial branch. This default branch name
hint: is subject to change. To configure the initial branch name to use in all
hint: of your new repositories, which will suppress this warning, call:
hint:
hint: 	git config --global init.defaultBranch <name>
hint:
hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
hint: 'development'. The just-created branch can be renamed via this command:
hint:
hint: 	git branch -m <name>
From https://github.com/modelcontextprotocol/swift-sdk
 * tag               0.12.1     -> FETCH_HEAD
HEAD is now at a0ae212 Improvements and fixes (#223)
Cloned https://github.com/modelcontextprotocol/swift-sdk.git
Revision (git rev-parse @):
a0ae212ebf6eab5f754c3129608bc5557637e605
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/modelcontextprotocol/swift-sdk.git at 0.12.1
========================================
Build
========================================
Selected platform:         android
Swift version:             6.4
Building package at path:  $PWD
https://github.com/modelcontextprotocol/swift-sdk.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-53886770-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/saguaro1/spi-images:android-6.4-latest swift build --swift-sdk aarch64-unknown-linux-android28 2>&1
android-6.4-latest: Pulling from saguaro1/spi-images
Digest: sha256:abadcff584c273feba50641b454858d377ba30b35ea7287a94f45ebd8afd0ea0
Status: Image is up to date for registry.gitlab.com/saguaro1/spi-images:android-6.4-latest
Fetching https://github.com/swiftlang/swift-docc-plugin
[1/2345] Fetching swift-docc-plugin
Fetched https://github.com/swiftlang/swift-docc-plugin (0.57s)
Fetching https://github.com/apple/swift-system.git
Fetching https://github.com/apple/swift-nio.git
Fetching https://github.com/mattt/eventsource.git
Fetching https://github.com/swiftlang/swift-docc-symbolkit
Fetching https://github.com/apple/swift-log.git
[1/8165] Fetching swift-log
[2/8468] Fetching swift-log, eventsource
[8469/12297] Fetching swift-log, eventsource, swift-docc-symbolkit
[12298/19249] Fetching swift-log, eventsource, swift-docc-symbolkit, swift-system
Fetched https://github.com/mattt/eventsource.git (0.62s)
Fetched https://github.com/swiftlang/swift-docc-symbolkit (0.62s)
Fetched https://github.com/apple/swift-log.git (0.62s)
[3198/6952] Fetching swift-system
Fetched https://github.com/apple/swift-system.git (0.71s)
[1/86091] Fetching swift-nio
Fetched https://github.com/apple/swift-nio.git (2.80s)
Computing version for https://github.com/swiftlang/swift-docc-symbolkit
Computed https://github.com/swiftlang/swift-docc-symbolkit at 1.0.0 (3.04s)
Computing version for https://github.com/mattt/eventsource.git
Computed https://github.com/mattt/eventsource.git at 1.5.1 (0.17s)
Computing version for https://github.com/apple/swift-log.git
Computed https://github.com/apple/swift-log.git at 1.15.1 (0.19s)
Computing version for https://github.com/apple/swift-system.git
Computed https://github.com/apple/swift-system.git at 1.8.1 (0.21s)
Computing version for https://github.com/apple/swift-nio.git
Computed https://github.com/apple/swift-nio.git at 2.103.0 (0.34s)
Fetching https://github.com/apple/swift-collections.git
Fetching https://github.com/apple/swift-atomics.git
[1/1881] Fetching swift-atomics
Fetched https://github.com/apple/swift-atomics.git (0.58s)
[1/27702] Fetching swift-collections
Fetched https://github.com/apple/swift-collections.git (1.21s)
Computing version for https://github.com/apple/swift-atomics.git
Computed https://github.com/apple/swift-atomics.git at 1.3.1 (1.39s)
Computing version for https://github.com/apple/swift-collections.git
Computed https://github.com/apple/swift-collections.git at 1.7.0 (0.29s)
Creating working copy for https://github.com/apple/swift-log.git
Working copy of https://github.com/apple/swift-log.git resolved at 1.15.1
Creating working copy for https://github.com/swiftlang/swift-docc-plugin
Working copy of https://github.com/swiftlang/swift-docc-plugin resolved at main (647c708)
Creating working copy for https://github.com/swiftlang/swift-docc-symbolkit
Working copy of https://github.com/swiftlang/swift-docc-symbolkit resolved at 1.0.0
Creating working copy for https://github.com/apple/swift-collections.git
Working copy of https://github.com/apple/swift-collections.git resolved at 1.7.0
Creating working copy for https://github.com/apple/swift-system.git
Working copy of https://github.com/apple/swift-system.git resolved at 1.8.1
Creating working copy for https://github.com/mattt/eventsource.git
Working copy of https://github.com/mattt/eventsource.git resolved at 1.5.1
Creating working copy for https://github.com/apple/swift-atomics.git
Working copy of https://github.com/apple/swift-atomics.git resolved at 1.3.1
Creating working copy for https://github.com/apple/swift-nio.git
Working copy of https://github.com/apple/swift-nio.git resolved at 2.103.0
Building for debugging...
[Computing dependencies]
[Pre-planning 1 / 867]
[Planning deferred tasks]
[161 / 301] _NIODataStructures
[167 / 335] _NIODataStructures
[170 / 335] _NIODataStructures
[184 / 335] InternalCollectionsUtilities
[186 / 335] InternalCollectionsUtilities
[188 / 335] Logging
[202 / 335] SystemPackage-product
[208 / 336] SystemPackage
[212 / 337] NIOConcurrencyHelpers
[215 / 337] NIOConcurrencyHelpers
[216 / 337] NIOConcurrencyHelpers
[218 / 337] Logging
[221 / 338] NIOConcurrencyHelpers
[227 / 338] SpanPreview
[228 / 338] SpanPreview
[232 / 338] SystemPackage
[234 / 339] SystemPackage
[238 / 339] _NIOBase64
[249 / 350] CNIOPosix
[260 / 350] CNIOLLHTTP
[264 / 350] CNIOLLHTTP
[270 / 350] Atomics
[274 / 351] Atomics
[276 / 351] InternalCollectionsUtilities
[283 / 357] SpanPreview
[293 / 367] CNIOAtomics
[296 / 367] MCP
[296 / 367] Atomics
[299 / 367] Atomics
error: SwiftCompile normal aarch64 failed with a nonzero exit code. Command line:     cd /host

/host/spi-builder-workspace/Sources/MCP/Base/Transports/HTTPClientTransport.swift:5:12: [1;31merror: [1;39mno such module 'EventSource'[0;0m
  [0;36m3 |[0;0m
  [0;36m4 |[0;0m #if !os(Linux)
  [0;36m5 |[0;0m     import EventSource
    [0;36m|[0;0m            `- [1;31merror: [1;39mno such module 'EventSource'[0;0m
  [0;36m6 |[0;0m #endif
  [0;36m7 |[0;0m
Failed frontend command:
/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend -frontend -emit-module -experimental-skip-non-inlinable-function-bodies-without-types /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthAuthorizationCodeFlow.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthAuthorizer.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthClientRegistrar.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthConfiguration.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthConstants.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthDiscovery.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthDiscoveryClient.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthErrors.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthModels.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthTokenEndpointClient.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthURLValidator.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthWWWAuthenticateParser.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/PKCE.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/TokenStorage.swift /host/spi-builder-workspace/Sources/MCP/Base/Error.swift /host/spi-builder-workspace/Sources/MCP/Base/ID.swift /host/spi-builder-workspace/Sources/MCP/Base/Icon.swift /host/spi-builder-workspace/Sources/MCP/Base/Lifecycle.swift /host/spi-builder-workspace/Sources/MCP/Base/Messages.swift /host/spi-builder-workspace/Sources/MCP/Base/PendingRequest.swift /host/spi-builder-workspace/Sources/MCP/Base/Transport.swift /host/spi-builder-workspace/Sources/MCP/Base/Transports/HTTPClientTransport.swift /host/spi-builder-workspace/Sources/MCP/Base/Transports/HTTPServer/HTTPRequestValidation.swift /host/spi-builder-workspace/Sources/MCP/Base/Transports/HTTPServer/HTTPServerTypes.swift /host/spi-builder-workspace/Sources/MCP/Base/Transports/HTTPServer/StatefulHTTPServerTransport.swift /host/spi-builder-workspace/Sources/MCP/Base/Transports/HTTPServer/StatelessHTTPServerTransport.swift /host/spi-builder-workspace/Sources/MCP/Base/Transports/InMemoryTransport.swift /host/spi-builder-workspace/Sources/MCP/Base/Transports/NetworkTransport.swift /host/spi-builder-workspace/Sources/MCP/Base/Transports/StdioTransport.swift /host/spi-builder-workspace/Sources/MCP/Base/UnitInterval.swift /host/spi-builder-workspace/Sources/MCP/Base/Utilities/Cancellation.swift /host/spi-builder-workspace/Sources/MCP/Base/Utilities/Ping.swift /host/spi-builder-workspace/Sources/MCP/Base/Utilities/Progress.swift /host/spi-builder-workspace/Sources/MCP/Base/Utilities/RequestContext.swift /host/spi-builder-workspace/Sources/MCP/Base/Value.swift /host/spi-builder-workspace/Sources/MCP/Base/Versioning.swift /host/spi-builder-workspace/Sources/MCP/Client/Client.swift /host/spi-builder-workspace/Sources/MCP/Client/Elicitation.swift /host/spi-builder-workspace/Sources/MCP/Client/Roots.swift /host/spi-builder-workspace/Sources/MCP/Client/Sampling.swift /host/spi-builder-workspace/Sources/MCP/Extensions/Data+Extensions.swift /host/spi-builder-workspace/Sources/MCP/Server/Completion.swift /host/spi-builder-workspace/Sources/MCP/Server/Logging.swift /host/spi-builder-workspace/Sources/MCP/Server/Prompts.swift /host/spi-builder-workspace/Sources/MCP/Server/Resources.swift /host/spi-builder-workspace/Sources/MCP/Server/Server.swift /host/spi-builder-workspace/Sources/MCP/Server/Tools.swift -target aarch64-unknown-linux-android28 -Xllvm -aarch64-use-tbi -disable-objc-interop -sdk /android-ndk/android-ndk-r27d/toolchains/llvm/prebuilt/linux-x86_64/sysroot -sysroot /android-ndk/android-ndk-r27d/toolchains/llvm/prebuilt/linux-x86_64/sysroot -I /host/spi-builder-workspace/.build/out/Products/Debug-android-aarch64 -module-cache-path /host/spi-builder-workspace/.build/out/ModuleCache.noindex -color-diagnostics -Xcc -fcolor-diagnostics -enable-testing -g -debug-info-format\=dwarf -dwarf-version\=4 -swift-version 6 -Onone -D SWIFT_PACKAGE -D DEBUG -D SWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -D Xcode -serialize-debugging-options -enable-upcoming-feature StrictConcurrency -enable-experimental-feature DebugDescriptionMacro -empty-abi-descriptor -external-plugin-path /root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/lib/swift/host/plugins/testing\#/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-plugin-server -validate-clang-modules-once -clang-build-session-file /host/spi-builder-workspace/.build/out/ModuleCache.noindex/Session.modulevalidation -Xcc -working-directory -Xcc /host -resource-dir /root/.swiftpm/swift-sdks/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_android.artifactbundle/swift-android/swift-resources/usr/lib/swift-aarch64 -enable-anonymous-context-mangled-names -file-compilation-dir /host -Xcc -resource-dir -Xcc /android-ndk/android-ndk-r27d/toolchains/llvm/prebuilt/linux-x86_64/lib/clang/18 -Xcc -fmodule-map-file\=/host/spi-builder-workspace/.build/checkouts/swift-system/Sources/CSystem/include/module.modulemap -Xcc -fno-omit-frame-pointer -Xcc -D_LIBCPP_HARDENING_MODE\=_LIBCPP_HARDENING_MODE_DEBUG -Xcc -fmodules-prune-interval\=86400 -Xcc -fmodules-prune-after\=345600 -Xcc -I/host/spi-builder-workspace/.build/checkouts/swift-system/Sources/CSystem/include -Xcc -I/host/spi-builder-workspace/.build/out/Products/Debug-android-aarch64/include -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/mcp-swift-sdk.build/Debug-android-aarch64/MCP-t.build/DerivedSources-normal/aarch64 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/mcp-swift-sdk.build/Debug-android-aarch64/MCP-t.build/DerivedSources/aarch64 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/mcp-swift-sdk.build/Debug-android-aarch64/MCP-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name MCP -package-name spi_builder_workspace -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/mcp-swift-sdk.build/Debug-android-aarch64/MCP-t.build/Objects-normal/aarch64/MCP_const_extract_protocols.json -in-process-plugin-server-path /root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/lib/swift/host/libSwiftInProcPluginServer.so -plugin-path /root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/lib/swift/host/plugins -plugin-path /root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/local/lib/swift/host/plugins -emit-module-doc-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/mcp-swift-sdk.build/Debug-android-aarch64/MCP-t.build/Objects-normal/aarch64/Modules/MCP.swiftdoc -emit-module-source-info-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/mcp-swift-sdk.build/Debug-android-aarch64/MCP-t.build/Objects-normal/aarch64/Modules/MCP.swiftsourceinfo -emit-objc-header-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/mcp-swift-sdk.build/Debug-android-aarch64/MCP-t.build/Objects-normal/aarch64/MCP-Swift.h -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/mcp-swift-sdk.build/Debug-android-aarch64/MCP-t.build/Objects-normal/aarch64/MCP-primary-emit-module.dia -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/mcp-swift-sdk.build/Debug-android-aarch64/MCP-t.build/Objects-normal/aarch64/MCP-primary-emit-module.d -parse-as-library -o /host/spi-builder-workspace/.build/out/Intermediates.noindex/mcp-swift-sdk.build/Debug-android-aarch64/MCP-t.build/Objects-normal/aarch64/Modules/MCP.swiftmodule
error: Build failed
BUILD FAILURE 6.4 android