Swift Package IndexBuild Information
Failed to build llbuild2, reference 1.0.0-beta3.10 (bc6abf), with Swift 6.1 for Wasm on 19 Apr 2026 14:11:16 UTC.
Build Command
bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.1-latest swift build --swift-sdk wasm32-unknown-wasi 2>&1Build Log
========================================
RunAll
========================================
Builder version: 4.70.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/apple/swift-llbuild2.git
Reference: 1.0.0-beta3.10
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/apple/swift-llbuild2
* tag 1.0.0-beta3.10 -> FETCH_HEAD
HEAD is now at bc6abf3 Merge pull request #254 from apple/fix-metrics
Cloned https://github.com/apple/swift-llbuild2.git
Revision (git rev-parse @):
bc6abf3eb3498308745e5f1b43af789f81932c6c
SUCCESS checkout https://github.com/apple/swift-llbuild2.git at 1.0.0-beta3.10
========================================
Build
========================================
Selected platform: wasm
Swift version: 6.1
Building package at path: $PWD
https://github.com/apple/swift-llbuild2.git
https://github.com/apple/swift-llbuild2.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.1-latest swift build --swift-sdk wasm32-unknown-wasi -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures 2>&1
wasm-6.1-latest: Pulling from swiftpackageindex/spi-images
Digest: sha256:276d66a16377d3ee059b2e3429cbc1154d9f01e42871e5d702fd5d8b9044d93d
Status: Image is up to date for registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.1-latest
Fetching https://github.com/apple/swift-log.git
Fetching https://github.com/apple/swift-protobuf.git
Fetching https://github.com/apple/swift-tools-support-async.git
Fetching https://github.com/apple/swift-nio.git
Fetching https://github.com/apple/swift-system.git
Fetching https://github.com/apple/swift-tools-support-core.git
[1/910] Fetching swift-tools-support-async
[848/7545] Fetching swift-tools-support-async, swift-log
[2238/14733] Fetching swift-tools-support-async, swift-log, swift-tools-support-core
[2377/20334] Fetching swift-tools-support-async, swift-log, swift-tools-support-core, swift-system
[4984/67346] Fetching swift-tools-support-async, swift-log, swift-tools-support-core, swift-system, swift-protobuf
[21575/150518] Fetching swift-tools-support-async, swift-log, swift-tools-support-core, swift-system, swift-protobuf, swift-nio
Fetched https://github.com/apple/swift-tools-support-core.git from cache (1.28s)
Fetching https://github.com/apple/swift-collections.git
[22369/143330] Fetching swift-tools-support-async, swift-log, swift-system, swift-protobuf, swift-nio
[32097/166899] Fetching swift-tools-support-async, swift-log, swift-system, swift-protobuf, swift-nio, swift-collections
Fetched https://github.com/apple/swift-collections.git from cache (3.01s)
[91258/143330] Fetching swift-tools-support-async, swift-log, swift-system, swift-protobuf, swift-nio
Fetching https://github.com/apple/swift-async-algorithms.git
[105397/149577] Fetching swift-tools-support-async, swift-log, swift-system, swift-protobuf, swift-nio, swift-async-algorithms
Fetched https://github.com/apple/swift-async-algorithms.git from cache (1.21s)
Fetching https://github.com/apple/swift-atomics.git
[114148/143330] Fetching swift-tools-support-async, swift-log, swift-system, swift-protobuf, swift-nio
[118887/145150] Fetching swift-tools-support-async, swift-log, swift-system, swift-protobuf, swift-nio, swift-atomics
Fetched https://github.com/apple/swift-atomics.git from cache (1.04s)
[125033/143330] Fetching swift-tools-support-async, swift-log, swift-system, swift-protobuf, swift-nio
Fetched https://github.com/apple/swift-tools-support-async.git from cache (17.26s)
Fetched https://github.com/apple/swift-system.git from cache (17.27s)
Fetched https://github.com/apple/swift-nio.git from cache (17.60s)
Fetched https://github.com/apple/swift-log.git from cache (19.28s)
Fetched https://github.com/apple/swift-protobuf.git from cache (19.44s)
Computing version for https://github.com/apple/swift-tools-support-async.git
Computed https://github.com/apple/swift-tools-support-async.git at 0.18.0 (22.72s)
Computing version for https://github.com/apple/swift-atomics.git
Computed https://github.com/apple/swift-atomics.git at 1.3.0 (0.69s)
Computing version for https://github.com/apple/swift-async-algorithms.git
Computed https://github.com/apple/swift-async-algorithms.git at 1.1.3 (0.83s)
Computing version for https://github.com/apple/swift-tools-support-core.git
Computed https://github.com/apple/swift-tools-support-core.git at 0.7.3 (0.87s)
Computing version for https://github.com/apple/swift-collections.git
Computed https://github.com/apple/swift-collections.git at 1.4.1 (1.24s)
Computing version for https://github.com/apple/swift-system.git
Computed https://github.com/apple/swift-system.git at 1.6.4 (0.94s)
Computing version for https://github.com/apple/swift-protobuf.git
Computed https://github.com/apple/swift-protobuf.git at 1.36.1 (0.92s)
Computing version for https://github.com/apple/swift-log.git
Computed https://github.com/apple/swift-log.git at 1.12.0 (0.67s)
Computing version for https://github.com/apple/swift-nio.git
Computed https://github.com/apple/swift-nio.git at 2.98.0 (2.25s)
Creating working copy for https://github.com/apple/swift-system.git
Working copy of https://github.com/apple/swift-system.git resolved at 1.6.4
Creating working copy for https://github.com/apple/swift-atomics.git
Working copy of https://github.com/apple/swift-atomics.git resolved at 1.3.0
Creating working copy for https://github.com/apple/swift-log.git
Working copy of https://github.com/apple/swift-log.git resolved at 1.12.0
Creating working copy for https://github.com/apple/swift-tools-support-async.git
Working copy of https://github.com/apple/swift-tools-support-async.git resolved at 0.18.0
Creating working copy for https://github.com/apple/swift-tools-support-core.git
Working copy of https://github.com/apple/swift-tools-support-core.git resolved at 0.7.3
Creating working copy for https://github.com/apple/swift-async-algorithms.git
Working copy of https://github.com/apple/swift-async-algorithms.git resolved at 1.1.3
Creating working copy for https://github.com/apple/swift-protobuf.git
Working copy of https://github.com/apple/swift-protobuf.git resolved at 1.36.1
Creating working copy for https://github.com/apple/swift-collections.git
Working copy of https://github.com/apple/swift-collections.git resolved at 1.4.1
Creating working copy for https://github.com/apple/swift-nio.git
Working copy of https://github.com/apple/swift-nio.git resolved at 2.98.0
[1/1] Compiling plugin SwiftProtobufPlugin
Building for debugging...
[1/50] Write sources
[9/50] Compiling _AtomicsShims.c
[10/50] Compiling FXCBLAKE3 blake3_simd_avx512.c
[11/50] Compiling FXCBLAKE3 blake3_simd_avx2.c
[11/50] Write sources
[30/50] Compiling FXCBLAKE3 blake3_simd_sse41.c
[31/50] Compiling TSCclibc strerror.c
[32/50] Compiling CNIOWindows shim.c
[33/50] Compiling TSCclibc process.c
[34/50] Compiling CSystem shims.c
[35/50] Compiling TSCclibc libc.c
[36/50] Compiling CNIOWASI CNIOWASI.c
[37/50] Compiling CNIOWindows WSAStartup.c
[38/50] Compiling CNIOOpenBSD shim.c
[39/50] Compiling CNIOPosix event_loop_id.c
[40/50] Compiling CNIOLinux liburing_shims.c
[40/50] Write sources
[43/50] Compiling CNIOLinux shim.c
[44/50] Compiling CNIODarwin shim.c
[45/50] Write swift-version-24593BA9C3E375BF.txt
In file included from /host/spi-builder-workspace/Sources/FXCProcessSpawnSync/spawner.c:18:
/root/.swiftpm/swift-sdks/swift-wasm-6.1-RELEASE-wasm32-unknown-wasi.artifactbundle/6.1-RELEASE-wasm32-unknown-wasi/wasm32-unknown-wasi/WASI.sdk/include/wasm32-wasi/signal.h:2:2: error: "wasm lacks signal support; to enable minimal signal emulation, compile with -D_WASI_EMULATED_SIGNAL and link with -lwasi-emulated-signal"
2 | #error "wasm lacks signal support; to enable minimal signal emulation, \
| ^
/host/spi-builder-workspace/Sources/FXCProcessSpawnSync/spawner.c:25:10: fatal error: 'pthread.h' file not found
25 | #include <pthread.h>
| ^~~~~~~~~~~
2 errors generated.
[46/50] Compiling FXCProcessSpawnSync spawner.c
[46/50] Compiling c-atomics.c
[46/50] Compiling FXCBLAKE3 blake3_all.c
[46/50] Compiling c-nioatomics.c
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.1-latest swift build --swift-sdk wasm32-unknown-wasi 2>&1
wasm-6.1-latest: Pulling from swiftpackageindex/spi-images
Digest: sha256:276d66a16377d3ee059b2e3429cbc1154d9f01e42871e5d702fd5d8b9044d93d
Status: Image is up to date for registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.1-latest
[0/1] Planning build
[1/1] Compiling plugin SwiftProtobufPlugin
Building for debugging...
In file included from /host/spi-builder-workspace/Sources/FXCProcessSpawnSync/spawner.c:18:
/root/.swiftpm/swift-sdks/swift-wasm-6.1-RELEASE-wasm32-unknown-wasi.artifactbundle/6.1-RELEASE-wasm32-unknown-wasi/wasm32-unknown-wasi/WASI.sdk/include/wasm32-wasi/signal.h:2:2: error: "wasm lacks signal support; to enable minimal signal emulation, compile with -D_WASI_EMULATED_SIGNAL and link with -lwasi-emulated-signal"
2 | #error "wasm lacks signal support; to enable minimal signal emulation, \
| ^
/host/spi-builder-workspace/Sources/FXCProcessSpawnSync/spawner.c:25:10: fatal error: 'pthread.h' file not found
25 | #include <pthread.h>
| ^~~~~~~~~~~
2 errors generated.
[1/6] Compiling FXCProcessSpawnSync spawner.c
[1/6] Compiling c-nioatomics.c
[1/6] Compiling FXCBLAKE3 blake3_all.c
[1/6] Compiling c-atomics.c
[1/6] Write swift-version-24593BA9C3E375BF.txt
BUILD FAILURE 6.1 wasm