swift-tools-support-async – Build Information

Build Information

Failed to build swift-tools-support-async, reference 0.20.0 (b2538c), with Swift 6.4 for Wasm on 25 Sep 2026 12:53:32 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-54344845-0":/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:wasm-6.4-latest swift build --swift-sdk swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 5.1.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/apple/swift-tools-support-async.git
Reference: 0.20.0
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-tools-support-async
 * tag               0.20.0     -> FETCH_HEAD
HEAD is now at b2538c3 Update CI config
Submodule path 'ThirdParty/BLAKE3': checked out '2f6f56f3477321c9e4742f1c863e45f2cfcbfb5e'
Submodule 'ThirdParty/BLAKE3' (https://github.com/BLAKE3-team/BLAKE3.git) registered for path 'ThirdParty/BLAKE3'
Cloning into '/host/spi-builder-workspace/ThirdParty/BLAKE3'...
Cloned https://github.com/apple/swift-tools-support-async.git
Revision (git rev-parse @):
b2538c3737abe16b4c2cc3ab678851366d8bbcdf
SUCCESS checkout https://github.com/apple/swift-tools-support-async.git at 0.20.0
========================================
Build
========================================
Selected platform:         wasm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/apple/swift-tools-support-async.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-54344845-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/saguaro1/spi-images:wasm-6.4-latest swift build --swift-sdk swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm 2>&1
wasm-6.4-latest: Pulling from saguaro1/spi-images
Digest: sha256:4328fdb43c680d205c1d6761b1e3267aa38277eefdda9ddfb17b6a0f1a77857a
Status: Image is up to date for registry.gitlab.com/saguaro1/spi-images:wasm-6.4-latest
Fetching https://github.com/swiftlang/swift-tools-support-core.git
Fetching https://github.com/apple/swift-system.git
Fetching https://github.com/apple/swift-collections.git
Fetching https://github.com/apple/swift-protobuf.git
Fetching https://github.com/apple/swift-log.git
Fetching https://github.com/apple/swift-nio.git
[1/8165] Fetching swift-log
[491/15568] Fetching swift-log, swift-tools-support-core
[7561/22520] Fetching swift-log, swift-tools-support-core, swift-system
Fetched https://github.com/swiftlang/swift-tools-support-core.git (0.64s)
Fetching https://github.com/apple/swift-async-algorithms.git
[1/27723] Fetching swift-collections
[22457/113823] Fetching swift-collections, swift-nio
[38917/120555] Fetching swift-collections, swift-nio, swift-async-algorithms
Fetched https://github.com/apple/swift-collections.git (1.25s)
[31701/92832] Fetching swift-nio, swift-async-algorithms
Fetching https://github.com/apple/swift-atomics.git
Fetched https://github.com/apple/swift-async-algorithms.git (0.64s)
[32718/86100] Fetching swift-nio
[49939/140386] Fetching swift-nio, swift-protobuf
[75022/142267] Fetching swift-nio, swift-protobuf, swift-atomics
Fetched https://github.com/apple/swift-atomics.git (0.61s)
[81722/140386] Fetching swift-nio, swift-protobuf
Fetched https://github.com/apple/swift-log.git (4.39s)
Fetched https://github.com/apple/swift-system.git (4.39s)
Fetched https://github.com/apple/swift-nio.git (4.43s)
Fetched https://github.com/apple/swift-protobuf.git (4.43s)
Computing version for https://github.com/apple/swift-atomics.git
Computed https://github.com/apple/swift-atomics.git at 1.3.1 (4.61s)
Computing version for https://github.com/swiftlang/swift-tools-support-core.git
Computed https://github.com/swiftlang/swift-tools-support-core.git at 0.8.0 (0.26s)
Computing version for https://github.com/apple/swift-async-algorithms.git
Computed https://github.com/apple/swift-async-algorithms.git at 1.1.6 (0.24s)
Computing version for https://github.com/apple/swift-collections.git
Computed https://github.com/apple/swift-collections.git at 1.7.0 (0.30s)
Computing version for https://github.com/apple/swift-protobuf.git
Computed https://github.com/apple/swift-protobuf.git at 1.38.1 (0.23s)
Computing version for https://github.com/apple/swift-system.git
Computed https://github.com/apple/swift-system.git at 1.8.1 (0.22s)
Computing version for https://github.com/apple/swift-log.git
Computed https://github.com/apple/swift-log.git at 1.15.1 (0.20s)
Computing version for https://github.com/apple/swift-nio.git
Computed https://github.com/apple/swift-nio.git at 2.103.0 (0.34s)
Creating working copy for https://github.com/apple/swift-protobuf.git
Working copy of https://github.com/apple/swift-protobuf.git resolved at 1.38.1
Creating working copy for https://github.com/swiftlang/swift-tools-support-core.git
Working copy of https://github.com/swiftlang/swift-tools-support-core.git resolved at 0.8.0
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
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/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/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-async-algorithms.git
Working copy of https://github.com/apple/swift-async-algorithms.git resolved at 1.1.6
Building for debugging...
[Computing dependencies]
[Constructing description]
[Pre-planning 1 / 1308]
[Planning deferred tasks]
[Starting]
[119 / 422] NIOEmbedded
In file included from /host/spi-builder-workspace/.build/checkouts/swift-tools-support-core/Sources/TSCclibc/process.c:15:
[1m/host/spi-builder-workspace/.build/checkouts/swift-tools-support-core/Sources/TSCclibc/include/process.h:3:10: [0m[0;1;31mfatal error: [0m[1m'spawn.h' file not found[0m
    3 | #include <spawn.h>[0m
      | [0;1;32m         ^~~~~~~~~
[0m1 error generated.
error: CompileC /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-tools-support-core.build/Debug-webassembly-wasm32/TSCclibc-t.build/Objects-normal/wasm32/process.o /host/spi-builder-workspace/.build/checkouts/swift-tools-support-core/Sources/TSCclibc/process.c normal wasm32 c com.apple.compilers.llvm.clang.1_0.compiler failed with a nonzero exit code. Command line:     cd /host

    Using response file: /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-tools-support-core.build/Debug-webassembly-wasm32/TSCclibc-t.build/Objects-normal/wasm32/9f65232cb83f8421e3a495a5062eba382369c975104ee97bafc405ab795bfc5e-common-args.resp

    /usr/bin/clang -x c -target wasm32-unknown-wasip1 -fmessage-length\=0 -fdiagnostics-show-note-include-stack -fmacro-backtrace-limit\=0 -fcolor-diagnostics -Wno-trigraphs -Wno-missing-field-initializers -Wno-missing-prototypes -Wno-return-type -Wno-missing-braces -Wparentheses -Wswitch -Wno-unused-function -Wno-unused-label -Wno-unused-parameter -Wno-unused-variable -Wunused-value -Wno-empty-body -Wno-uninitialized -Wno-unknown-pragmas -w -Wno-shadow -Wno-four-char-constants -Wno-conversion -Wno-constant-conversion -Wno-int-conversion -Wno-bool-conversion -Wno-enum-conversion -Wno-float-conversion -Wno-non-literal-null-conversion -Wno-objc-literal-conversion -Wno-shorten-64-to-32 -Wpointer-sign -Wno-newline-eof -Wno-implicit-fallthrough -fstrict-aliasing -Wdeprecated-declarations -Wno-sign-conversion -Wno-infinite-recursion -Wno-comma -Wno-block-capture-autoreleasing -Wno-strict-prototypes -Wno-semicolon-before-method-body --sysroot /root/.swiftpm/swift-sdks/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm.artifactbundle/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm/wasm32-unknown-wasip1/WASI.sdk @/host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-tools-support-core.build/Debug-webassembly-wasm32/TSCclibc-t.build/Objects-normal/wasm32/9f65232cb83f8421e3a495a5062eba382369c975104ee97bafc405ab795bfc5e-common-args.resp -MMD -MT dependencies -MF /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-tools-support-core.build/Debug-webassembly-wasm32/TSCclibc-t.build/Objects-normal/wasm32/process.d --serialize-diagnostics /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-tools-support-core.build/Debug-webassembly-wasm32/TSCclibc-t.build/Objects-normal/wasm32/process.dia -c /host/spi-builder-workspace/.build/checkouts/swift-tools-support-core/Sources/TSCclibc/process.c -o /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-tools-support-core.build/Debug-webassembly-wasm32/TSCclibc-t.build/Objects-normal/wasm32/process.o
In file included from /host/spi-builder-workspace/Sources/CProcessSpawnSync/spawner.c:18:
[1m/root/.swiftpm/swift-sdks/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm.artifactbundle/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm/wasm32-unknown-wasip1/WASI.sdk/include/wasm32-wasip1/signal.h:2:2: [0m[0;1;31merror: [0m[1m"wasm lacks signal support; to enable minimal signal emulation, compile with -D_WASI_EMULATED_SIGNAL and link with -lwasi-emulated-signal"[0m
    2 | #error [0;32m"wasm lacks signal support; to enable minimal signal emulation, \[0m
      | [0;1;32m ^
[0m[1m/host/spi-builder-workspace/Sources/CProcessSpawnSync/spawner.c:26:10: [0m[0;1;31mfatal error: [0m[1m'sys/wait.h' file not found[0m
   26 | #include <sys/wait.h>[0m
      | [0;1;32m         ^~~~~~~~~~~~
[0m2 errors generated.
error: CompileC /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-tools-support-async.build/Debug-webassembly-wasm32/TSFCProcessSpawnSync-t.build/Objects-normal/wasm32/spawner.o /host/spi-builder-workspace/Sources/CProcessSpawnSync/spawner.c normal wasm32 c com.apple.compilers.llvm.clang.1_0.compiler failed with a nonzero exit code. Command line:     cd /host

    Using response file: /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-tools-support-async.build/Debug-webassembly-wasm32/TSFCProcessSpawnSync-t.build/Objects-normal/wasm32/9f65232cb83f8421e3a495a5062eba382369c975104ee97bafc405ab795bfc5e-common-args.resp

    /usr/bin/clang -x c -target wasm32-unknown-wasip1 -fmessage-length\=0 -fdiagnostics-show-note-include-stack -fmacro-backtrace-limit\=0 -fcolor-diagnostics -Wno-trigraphs -Wno-missing-field-initializers -Wno-missing-prototypes -Wno-return-type -Wno-missing-braces -Wparentheses -Wswitch -Wno-unused-function -Wno-unused-label -Wno-unused-parameter -Wno-unused-variable -Wunused-value -Wno-empty-body -Wno-uninitialized -Wno-unknown-pragmas -Wno-shadow -Wno-four-char-constants -Wno-conversion -Wno-constant-conversion -Wno-int-conversion -Wno-bool-conversion -Wno-enum-conversion -Wno-float-conversion -Wno-non-literal-null-conversion -Wno-objc-literal-conversion -Wno-shorten-64-to-32 -Wpointer-sign -Wno-newline-eof -Wno-implicit-fallthrough -fstrict-aliasing -Wdeprecated-declarations -Wno-sign-conversion -Wno-infinite-recursion -Wno-comma -Wno-block-capture-autoreleasing -Wno-strict-prototypes -Wno-semicolon-before-method-body --sysroot /root/.swiftpm/swift-sdks/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm.artifactbundle/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm/wasm32-unknown-wasip1/WASI.sdk @/host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-tools-support-async.build/Debug-webassembly-wasm32/TSFCProcessSpawnSync-t.build/Objects-normal/wasm32/9f65232cb83f8421e3a495a5062eba382369c975104ee97bafc405ab795bfc5e-common-args.resp -MMD -MT dependencies -MF /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-tools-support-async.build/Debug-webassembly-wasm32/TSFCProcessSpawnSync-t.build/Objects-normal/wasm32/spawner.d --serialize-diagnostics /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-tools-support-async.build/Debug-webassembly-wasm32/TSFCProcessSpawnSync-t.build/Objects-normal/wasm32/spawner.dia -c /host/spi-builder-workspace/Sources/CProcessSpawnSync/spawner.c -o /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-tools-support-async.build/Debug-webassembly-wasm32/TSFCProcessSpawnSync-t.build/Objects-normal/wasm32/spawner.o
error: Build failed
BUILD FAILURE 6.4 wasm