Swift Package Index

Build Information

Failed to build DL4STensorboard, reference 0.1.0 (4d9803), with Swift 6.4 for iOS using Xcode 27.0 on 15 Sep 2026 21:15:54 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: 0.1.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/palle-k/DL4S-Tensorboard
 * tag               0.1.0      -> FETCH_HEAD
HEAD is now at 4d98033 minor changes
Cloned https://github.com/palle-k/DL4S-Tensorboard.git
Revision (git rev-parse @):
4d98033d0f414a8db4c39792c0a36e045c1dd1c1
SUCCESS checkout https://github.com/palle-k/DL4S-Tensorboard.git at 0.1.0
========================================
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/apple/swift-protobuf.git
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 (a06a1d9) of package ‘DL4S’
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:
  DL4S: https://github.com/palle-k/DL4S.git @ master (a06a1d9)
  SwiftGD: https://github.com/twostraws/SwiftGD @ 2.6.0
  SwiftProtobuf: https://github.com/apple/swift-protobuf.git @ 1.38.1
  DL4STensorboard: /Users/admin/builder/spi-builder-workspace
resolved source packages: DL4S, SwiftGD, SwiftProtobuf, DL4STensorboard
2026-09-15 17:15:00.365 xcodebuild[529:3021] [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" : "1.6.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-protobuf.git"
    },
    {
      "identity" : "swiftgd",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "2.0.0",
            "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" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    }
  ],
  "products" : [
    {
      "name" : "DL4STensorboard",
      "targets" : [
        "DL4STensorboard"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "DL4STensorboardTests",
      "module_type" : "SwiftTarget",
      "name" : "DL4STensorboardTests",
      "path" : "Tests/DL4STensorboardTests",
      "sources" : [
        "DL4S_TensorboardTests.swift",
        "HistogramTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "DL4STensorboard"
      ],
      "type" : "test"
    },
    {
      "c99name" : "DL4STensorboard",
      "module_type" : "SwiftTarget",
      "name" : "DL4STensorboard",
      "path" : "Sources/DL4STensorboard",
      "product_dependencies" : [
        "DL4S",
        "SwiftProtobuf",
        "SwiftGD"
      ],
      "product_memberships" : [
        "DL4STensorboard"
      ],
      "sources" : [
        "Autogenerated/event.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" : "5.2"
}
{
  "workspace" : {
    "name" : "DL4STensorboard",
    "schemes" : [
      "DL4STensorboard"
    ]
  }
}
2026-09-15 17:15:43.275 xcodebuild[766:4715] [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:
  DL4STensorboard: /Users/admin/builder/spi-builder-workspace
  SwiftProtobuf: https://github.com/apple/swift-protobuf.git @ 1.38.1
  SwiftGD: https://github.com/twostraws/SwiftGD @ 2.6.0
  DL4S: https://github.com/palle-k/DL4S.git @ master (a06a1d9)
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 'DL4S-product' in project 'DL4S'
        ➜ Explicit dependency on target 'SwiftProtobuf-product' in project 'SwiftProtobuf'
        ➜ Explicit dependency on target 'SwiftGD-product' in project 'SwiftGD'
    Target 'DL4STensorboard' in project 'DL4STensorboard'
        ➜ Explicit dependency on target 'DL4S-product' in project 'DL4S'
        ➜ Explicit dependency on target 'SwiftProtobuf-product' in project 'SwiftProtobuf'
        ➜ Explicit dependency on target 'SwiftGD-product' in project 'SwiftGD'
    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)
    Target 'DL4S-product' in project 'DL4S'
        ➜ Explicit dependency on target 'DL4S' in project 'DL4S'
        ➜ Explicit dependency on target 'MKL' in project 'DL4S'
    Target 'DL4S' in project 'DL4S'
        ➜ Explicit dependency on target 'MKL' in project 'DL4S'
    Target 'MKL' in project 'DL4S' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
ExecuteExternalTool /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch arm64 -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/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/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: 97fbd8d66585a42836206562b67c48e0
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/97fbd8d66585a42836206562b67c48e0.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')
2026-09-15 17:15:46.849 xcodebuild[775:4781] [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:
  SwiftProtobuf: https://github.com/apple/swift-protobuf.git @ 1.38.1
  DL4STensorboard: /Users/admin/builder/spi-builder-workspace
  DL4S: https://github.com/palle-k/DL4S.git @ master (a06a1d9)
  SwiftGD: https://github.com/twostraws/SwiftGD @ 2.6.0
resolved source packages: SwiftProtobuf, DL4STensorboard, DL4S, SwiftGD
2026-09-15 17:15:49.956 xcodebuild[824:5037] [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" : "1.6.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-protobuf.git"
    },
    {
      "identity" : "swiftgd",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "2.0.0",
            "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" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    }
  ],
  "products" : [
    {
      "name" : "DL4STensorboard",
      "targets" : [
        "DL4STensorboard"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "DL4STensorboardTests",
      "module_type" : "SwiftTarget",
      "name" : "DL4STensorboardTests",
      "path" : "Tests/DL4STensorboardTests",
      "sources" : [
        "DL4S_TensorboardTests.swift",
        "HistogramTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "DL4STensorboard"
      ],
      "type" : "test"
    },
    {
      "c99name" : "DL4STensorboard",
      "module_type" : "SwiftTarget",
      "name" : "DL4STensorboard",
      "path" : "Sources/DL4STensorboard",
      "product_dependencies" : [
        "DL4S",
        "SwiftProtobuf",
        "SwiftGD"
      ],
      "product_memberships" : [
        "DL4STensorboard"
      ],
      "sources" : [
        "Autogenerated/event.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" : "5.2"
}
{
  "workspace" : {
    "name" : "DL4STensorboard",
    "schemes" : [
      "DL4STensorboard"
    ]
  }
}
2026-09-15 17:15:51.934 xcodebuild[840:5111] [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:
  SwiftProtobuf: https://github.com/apple/swift-protobuf.git @ 1.38.1
  DL4S: https://github.com/palle-k/DL4S.git @ master (a06a1d9)
  SwiftGD: https://github.com/twostraws/SwiftGD @ 2.6.0
  DL4STensorboard: /Users/admin/builder/spi-builder-workspace
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 'DL4S-product' in project 'DL4S'
        ➜ Explicit dependency on target 'SwiftProtobuf-product' in project 'SwiftProtobuf'
        ➜ Explicit dependency on target 'SwiftGD-product' in project 'SwiftGD'
    Target 'DL4STensorboard' in project 'DL4STensorboard'
        ➜ Explicit dependency on target 'DL4S-product' in project 'DL4S'
        ➜ Explicit dependency on target 'SwiftProtobuf-product' in project 'SwiftProtobuf'
        ➜ Explicit dependency on target 'SwiftGD-product' in project 'SwiftGD'
    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)
    Target 'DL4S-product' in project 'DL4S'
        ➜ Explicit dependency on target 'DL4S' in project 'DL4S'
        ➜ Explicit dependency on target 'MKL' in project 'DL4S'
    Target 'DL4S' in project 'DL4S'
        ➜ Explicit dependency on target 'MKL' in project 'DL4S'
    Target 'MKL' in project 'DL4S' (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')
2026-09-15 17:15:53.674 xcodebuild[849:5151] [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