Swift Package Index

Build Information

Failed to build DL4STensorboard, reference master (36880c), with Swift 6.4 for iOS using Xcode 27.0 on 28 Sep 2026 21:31:09 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme DL4STensorboard -destination generic/platform=iOS

Build Log

========================================
RunAll
========================================
Builder version: 5.1.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/palle-k/DL4S-Tensorboard.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/palle-k/DL4S-Tensorboard
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 36880c8 feat: revive build
Cloned https://github.com/palle-k/DL4S-Tensorboard.git
Revision (git rev-parse @):
36880c8d0de2715a580ba82a99813a41cbe16485
SUCCESS checkout https://github.com/palle-k/DL4S-Tensorboard.git at master
========================================
Build
========================================
Selected platform:         iOS
Swift version:             6.4
Building package at path:  $PWD
https://github.com/palle-k/DL4S-Tensorboard.git
Command line invocation:
    /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Fetching from https://github.com/palle-k/DL4S.git
Fetching from https://github.com/twostraws/SwiftGD
Fetching from https://github.com/swiftlang/swift-syntax
Fetching from https://github.com/apple/swift-protobuf.git
Creating working copy of package ‘swift-syntax’
Checking out 604.0.0 of package ‘swift-syntax’
Creating working copy of package ‘swift-protobuf’
Checking out 1.38.1 of package ‘swift-protobuf’
Creating working copy of package ‘SwiftGD’
Checking out 2.6.0 of package ‘SwiftGD’
Creating working copy of package ‘DL4S’
Checking out master (c396aff) of package ‘DL4S’
Downloading package prebuilt https://download.swift.org/prebuilts/swift-syntax/604.0.0/swiftlang-6.4.0.34.1-macosx27.0-MacroSupport.zip
failed to retrieve search paths with pkg-config; maybe pkg-config is not installedyou may be able to install gdlib using your system-packager:
    brew install gd
Resolve Package Graph
you may be able to install gdlib using your system-packager:
    brew install gd
Resolved source packages:
  SwiftProtobuf: https://github.com/apple/swift-protobuf.git @ 1.38.1
  swift-syntax: https://github.com/swiftlang/swift-syntax @ 604.0.0
  DL4S: https://github.com/palle-k/DL4S.git @ master (c396aff)
  DL4STensorboard: /Users/admin/builder/spi-builder-workspace
  SwiftGD: https://github.com/twostraws/SwiftGD @ 2.6.0
resolved source packages: SwiftProtobuf, swift-syntax, DL4S, DL4STensorboard, SwiftGD
2026-09-28 17:30:23.058 xcodebuild[529:3035] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
{
  "dependencies" : [
    {
      "identity" : "dl4s",
      "requirement" : {
        "branch" : [
          "master"
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/palle-k/DL4S.git"
    },
    {
      "identity" : "swift-protobuf",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.38.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-protobuf.git"
    },
    {
      "identity" : "swiftgd",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "2.6.0",
            "upper_bound" : "3.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/twostraws/SwiftGD"
    }
  ],
  "manifest_display_name" : "DL4STensorboard",
  "name" : "DL4STensorboard",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "15.0"
    }
  ],
  "products" : [
    {
      "name" : "DL4STensorboard",
      "targets" : [
        "DL4STensorboard"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "6"
  ],
  "targets" : [
    {
      "c99name" : "DL4STensorboardTests",
      "module_type" : "SwiftTarget",
      "name" : "DL4STensorboardTests",
      "path" : "Tests/DL4STensorboardTests",
      "sources" : [
        "CRCTests.swift",
        "HistogramTests.swift",
        "TensorboardWriterTests.swift"
      ],
      "target_dependencies" : [
        "DL4STensorboard"
      ],
      "type" : "test"
    },
    {
      "c99name" : "DL4STensorboard",
      "module_type" : "SwiftTarget",
      "name" : "DL4STensorboard",
      "path" : "Sources/DL4STensorboard",
      "product_dependencies" : [
        "SwiftProtobuf",
        "SwiftGD",
        "DL4S"
      ],
      "product_memberships" : [
        "DL4STensorboard"
      ],
      "sources" : [
        "Autogenerated/event.pb.swift",
        "Autogenerated/histogram.pb.swift",
        "Autogenerated/resource_handle.pb.swift",
        "Autogenerated/summary.pb.swift",
        "Autogenerated/tensor.pb.swift",
        "Autogenerated/tensor_shape.pb.swift",
        "Autogenerated/types.pb.swift",
        "CRC.swift",
        "Ext.swift",
        "Histogram.swift",
        "TSVWriter.swift",
        "TensorboardWriter.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "6.2"
}
{
  "workspace" : {
    "name" : "DL4STensorboard",
    "schemes" : [
      "DL4STensorboard"
    ]
  }
}
2026-09-28 17:30:52.671 xcodebuild[811:4802] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme DL4STensorboard -destination generic/platform=iOS
Command line invocation:
    /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath /Users/admin/builder/spi-builder-workspace/.derivedData build -scheme DL4STensorboard -destination generic/platform=iOS
Resolve Package Graph
failed to retrieve search paths with pkg-config; maybe pkg-config is not installedyou may be able to install gdlib using your system-packager:
    brew install gd
Resolve Package Graph
you may be able to install gdlib using your system-packager:
    brew install gd
Resolved source packages:
  SwiftGD: https://github.com/twostraws/SwiftGD @ 2.6.0
  DL4S: https://github.com/palle-k/DL4S.git @ master (c396aff)
  swift-syntax: https://github.com/swiftlang/swift-syntax @ 604.0.0
  DL4STensorboard: /Users/admin/builder/spi-builder-workspace
  SwiftProtobuf: https://github.com/apple/swift-protobuf.git @ 1.38.1
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (11 targets)
    Target 'DL4STensorboard-product' in project 'DL4STensorboard'
        ➜ Explicit dependency on target 'DL4STensorboard' in project 'DL4STensorboard'
        ➜ Explicit dependency on target 'SwiftProtobuf-product' in project 'SwiftProtobuf'
        ➜ Explicit dependency on target 'SwiftGD-product' in project 'SwiftGD'
        ➜ Explicit dependency on target 'DL4S-product' in project 'DL4S'
    Target 'DL4STensorboard' in project 'DL4STensorboard'
        ➜ Explicit dependency on target 'SwiftProtobuf-product' in project 'SwiftProtobuf'
        ➜ Explicit dependency on target 'SwiftGD-product' in project 'SwiftGD'
        ➜ Explicit dependency on target 'DL4S-product' in project 'DL4S'
    Target 'DL4S-product' in project 'DL4S'
        ➜ Explicit dependency on target 'DL4S' in project 'DL4S'
        ➜ Explicit dependency on target 'DL4SMacros' in project 'DL4S'
    Target 'DL4S' in project 'DL4S'
        ➜ Explicit dependency on target 'DL4SMacros' in project 'DL4S'
    Target 'DL4SMacros' in project 'DL4S' (no dependencies)
    Target 'SwiftGD-product' in project 'SwiftGD'
        ➜ Explicit dependency on target 'SwiftGD' in project 'SwiftGD'
    Target 'SwiftGD' in project 'SwiftGD'
        ➜ Explicit dependency on target 'gd' in project 'SwiftGD'
    Target 'gd' in project 'SwiftGD' (no dependencies)
    Target 'SwiftProtobuf-product' in project 'SwiftProtobuf'
        ➜ Explicit dependency on target 'SwiftProtobuf' in project 'SwiftProtobuf'
        ➜ Explicit dependency on target 'SwiftProtobuf_SwiftProtobuf' in project 'SwiftProtobuf'
    Target 'SwiftProtobuf' in project 'SwiftProtobuf'
        ➜ Explicit dependency on target 'SwiftProtobuf_SwiftProtobuf' in project 'SwiftProtobuf'
    Target 'SwiftProtobuf_SwiftProtobuf' in project 'SwiftProtobuf' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
ExecuteExternalTool /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc --version
ExecuteExternalTool /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS27.0.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld -version_details
ReadFileContents /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/share/docc/features.json
Build description signature: 0a9aab28acfe036dc3aacb2d462f5ef6
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/0a9aab28acfe036dc3aacb2d462f5ef6.xcbuilddata
error: The package product 'DL4S-product' requires minimum platform version 18.0 for the iOS platform, but this target supports 15.0 (in target 'DL4STensorboard' from project 'DL4STensorboard')
2026-09-28 17:30:57.232 xcodebuild[821:4885] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
** BUILD FAILED **
The following build commands failed:
	Building workspace DL4STensorboard with scheme DL4STensorboard
(1 failure)
Command line invocation:
    /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
failed to retrieve search paths with pkg-config; maybe pkg-config is not installedyou may be able to install gdlib using your system-packager:
    brew install gd
Resolved source packages:
  swift-syntax: https://github.com/swiftlang/swift-syntax @ 604.0.0
  DL4S: https://github.com/palle-k/DL4S.git @ master (c396aff)
  DL4STensorboard: /Users/admin/builder/spi-builder-workspace
  SwiftGD: https://github.com/twostraws/SwiftGD @ 2.6.0
  SwiftProtobuf: https://github.com/apple/swift-protobuf.git @ 1.38.1
resolved source packages: swift-syntax, DL4S, DL4STensorboard, SwiftGD, SwiftProtobuf
2026-09-28 17:31:02.287 xcodebuild[879:5194] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
{
  "dependencies" : [
    {
      "identity" : "dl4s",
      "requirement" : {
        "branch" : [
          "master"
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/palle-k/DL4S.git"
    },
    {
      "identity" : "swift-protobuf",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.38.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-protobuf.git"
    },
    {
      "identity" : "swiftgd",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "2.6.0",
            "upper_bound" : "3.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/twostraws/SwiftGD"
    }
  ],
  "manifest_display_name" : "DL4STensorboard",
  "name" : "DL4STensorboard",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "15.0"
    }
  ],
  "products" : [
    {
      "name" : "DL4STensorboard",
      "targets" : [
        "DL4STensorboard"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "6"
  ],
  "targets" : [
    {
      "c99name" : "DL4STensorboardTests",
      "module_type" : "SwiftTarget",
      "name" : "DL4STensorboardTests",
      "path" : "Tests/DL4STensorboardTests",
      "sources" : [
        "CRCTests.swift",
        "HistogramTests.swift",
        "TensorboardWriterTests.swift"
      ],
      "target_dependencies" : [
        "DL4STensorboard"
      ],
      "type" : "test"
    },
    {
      "c99name" : "DL4STensorboard",
      "module_type" : "SwiftTarget",
      "name" : "DL4STensorboard",
      "path" : "Sources/DL4STensorboard",
      "product_dependencies" : [
        "SwiftProtobuf",
        "SwiftGD",
        "DL4S"
      ],
      "product_memberships" : [
        "DL4STensorboard"
      ],
      "sources" : [
        "Autogenerated/event.pb.swift",
        "Autogenerated/histogram.pb.swift",
        "Autogenerated/resource_handle.pb.swift",
        "Autogenerated/summary.pb.swift",
        "Autogenerated/tensor.pb.swift",
        "Autogenerated/tensor_shape.pb.swift",
        "Autogenerated/types.pb.swift",
        "CRC.swift",
        "Ext.swift",
        "Histogram.swift",
        "TSVWriter.swift",
        "TensorboardWriter.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "6.2"
}
{
  "workspace" : {
    "name" : "DL4STensorboard",
    "schemes" : [
      "DL4STensorboard"
    ]
  }
}
2026-09-28 17:31:05.213 xcodebuild[896:5286] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme DL4STensorboard -destination generic/platform=iOS
Command line invocation:
    /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath /Users/admin/builder/spi-builder-workspace/.derivedData build -scheme DL4STensorboard -destination generic/platform=iOS
Resolve Package Graph
failed to retrieve search paths with pkg-config; maybe pkg-config is not installedyou may be able to install gdlib using your system-packager:
    brew install gd
Resolved source packages:
  DL4S: https://github.com/palle-k/DL4S.git @ master (c396aff)
  DL4STensorboard: /Users/admin/builder/spi-builder-workspace
  SwiftGD: https://github.com/twostraws/SwiftGD @ 2.6.0
  SwiftProtobuf: https://github.com/apple/swift-protobuf.git @ 1.38.1
  swift-syntax: https://github.com/swiftlang/swift-syntax @ 604.0.0
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (11 targets)
    Target 'DL4STensorboard-product' in project 'DL4STensorboard'
        ➜ Explicit dependency on target 'DL4STensorboard' in project 'DL4STensorboard'
        ➜ Explicit dependency on target 'SwiftProtobuf-product' in project 'SwiftProtobuf'
        ➜ Explicit dependency on target 'SwiftGD-product' in project 'SwiftGD'
        ➜ Explicit dependency on target 'DL4S-product' in project 'DL4S'
    Target 'DL4STensorboard' in project 'DL4STensorboard'
        ➜ Explicit dependency on target 'SwiftProtobuf-product' in project 'SwiftProtobuf'
        ➜ Explicit dependency on target 'SwiftGD-product' in project 'SwiftGD'
        ➜ Explicit dependency on target 'DL4S-product' in project 'DL4S'
    Target 'DL4S-product' in project 'DL4S'
        ➜ Explicit dependency on target 'DL4S' in project 'DL4S'
        ➜ Explicit dependency on target 'DL4SMacros' in project 'DL4S'
    Target 'DL4S' in project 'DL4S'
        ➜ Explicit dependency on target 'DL4SMacros' in project 'DL4S'
    Target 'DL4SMacros' in project 'DL4S' (no dependencies)
    Target 'SwiftGD-product' in project 'SwiftGD'
        ➜ Explicit dependency on target 'SwiftGD' in project 'SwiftGD'
    Target 'SwiftGD' in project 'SwiftGD'
        ➜ Explicit dependency on target 'gd' in project 'SwiftGD'
    Target 'gd' in project 'SwiftGD' (no dependencies)
    Target 'SwiftProtobuf-product' in project 'SwiftProtobuf'
        ➜ Explicit dependency on target 'SwiftProtobuf' in project 'SwiftProtobuf'
        ➜ Explicit dependency on target 'SwiftProtobuf_SwiftProtobuf' in project 'SwiftProtobuf'
    Target 'SwiftProtobuf' in project 'SwiftProtobuf'
        ➜ Explicit dependency on target 'SwiftProtobuf_SwiftProtobuf' in project 'SwiftProtobuf'
    Target 'SwiftProtobuf_SwiftProtobuf' in project 'SwiftProtobuf' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
error: The package product 'DL4S-product' requires minimum platform version 18.0 for the iOS platform, but this target supports 15.0 (in target 'DL4STensorboard' from project 'DL4STensorboard')
2026-09-28 17:31:07.896 xcodebuild[906:5333] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
** BUILD FAILED **
The following build commands failed:
	Building workspace DL4STensorboard with scheme DL4STensorboard
(1 failure)
BUILD FAILURE 6.4 iOS