LibPNG – Build Information – Swift Package Index

Has it really been five years since Swift Package Index launched? Read our anniversary blog post!

Build Information

Failed to build LibPNG, reference master (c059e4), with Swift 6.2 (beta) for macOS (Xcode) using Xcode 26.0 on 21 Jun 2025 17:57:00 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-26.0.0-Beta.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme LibPNG -destination platform=macOS,arch=arm64

Build Log

========================================
RunAll
========================================
Builder version: 4.64.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/LuizZak/swift-libpng.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/LuizZak/swift-libpng
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at c059e4a Adding test for PNGFile.fromArgb
Cloned https://github.com/LuizZak/swift-libpng.git
Revision (git rev-parse @):
c059e4a34d0a84a2a1cc7eac8acdb8fa3ab8142f
SUCCESS checkout https://github.com/LuizZak/swift-libpng.git at master
========================================
Build
========================================
Selected platform:         macosXcodebuild
Swift version:             6.2
Building package at path:  $PWD
https://github.com/LuizZak/swift-libpng.git
Command line invocation:
    /Applications/Xcode-26.0.0-Beta.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 libpng using your system-packager:
    brew install libpng
Resolve Package Graph
you may be able to install libpng using your system-packager:
    brew install libpng
Resolved source packages:
  LibPNG: /Users/admin/builder/spi-builder-workspace
resolved source packages: LibPNG
{
  "dependencies" : [
  ],
  "manifest_display_name" : "LibPNG",
  "name" : "LibPNG",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "LibPNG",
      "targets" : [
        "LibPNG"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "CLibPNG",
      "targets" : [
        "CLibPNG"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "LibPNGTests",
      "module_type" : "SwiftTarget",
      "name" : "LibPNGTests",
      "path" : "Tests/LibPNGTests",
      "sources" : [
        "LibPNGTests.swift"
      ],
      "target_dependencies" : [
        "LibPNG"
      ],
      "type" : "test"
    },
    {
      "c99name" : "LibPNG",
      "module_type" : "SwiftTarget",
      "name" : "LibPNG",
      "path" : "Sources/LibPNG",
      "product_memberships" : [
        "LibPNG"
      ],
      "sources" : [
        "LibPNG+FromData.swift",
        "LibPNG.swift"
      ],
      "target_dependencies" : [
        "CLibPNG"
      ],
      "type" : "library"
    },
    {
      "c99name" : "CLibPNG",
      "module_type" : "SystemLibraryTarget",
      "name" : "CLibPNG",
      "path" : "Sources/CLibPNG",
      "product_memberships" : [
        "LibPNG",
        "CLibPNG"
      ],
      "sources" : [
      ],
      "type" : "system-target"
    }
  ],
  "tools_version" : "5.4"
}
{
  "workspace" : {
    "name" : "spi-builder-workspace",
    "schemes" : [
      "LibPNG"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-26.0.0-Beta.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme LibPNG -destination platform=macOS,arch=arm64
Command line invocation:
    /Applications/Xcode-26.0.0-Beta.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 LibPNG -destination platform=macOS,arch=arm64
Resolve Package Graph
failed to retrieve search paths with pkg-config; maybe pkg-config is not installedyou may be able to install libpng using your system-packager:
    brew install libpng
Resolved source packages:
  LibPNG: /Users/admin/builder/spi-builder-workspace
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (3 targets)
    Target 'LibPNG' in project 'LibPNG'
        ➜ Explicit dependency on target 'LibPNG' in project 'LibPNG'
    Target 'LibPNG' in project 'LibPNG'
        ➜ Explicit dependency on target 'CLibPNG' in project 'LibPNG'
    Target 'CLibPNG' in project 'LibPNG' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
ExecuteExternalTool /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX26.0.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc --version
ExecuteExternalTool /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld -version_details
Build description signature: 033882af84ebc5ac007ecae6f4720568
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/033882af84ebc5ac007ecae6f4720568.xcbuilddata
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products
ClangStatCache /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang-stat-cache /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX26.0.sdk /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/macosx26.0-25A5279m-f7c1d129d9d5414f2afbbad1fd6fd62e.sdkstatcache
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang-stat-cache /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX26.0.sdk -o /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/macosx26.0-25A5279m-f7c1d129d9d5414f2afbbad1fd6fd62e.sdkstatcache
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/EagerLinkingTBDs/Debug
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/EagerLinkingTBDs/Debug
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug/PackageFrameworks
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug/PackageFrameworks
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/LibPNG.DependencyMetadataFileList (in target 'LibPNG' from project 'LibPNG')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/LibPNG.DependencyMetadataFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/LibPNG.modulemap (in target 'LibPNG' from project 'LibPNG')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/LibPNG.modulemap
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/LibPNG.DependencyStaticMetadataFileList (in target 'LibPNG' from project 'LibPNG')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/LibPNG.DependencyStaticMetadataFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/Objects-normal/arm64/LibPNG.SwiftFileList (in target 'LibPNG' from project 'LibPNG')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/Objects-normal/arm64/LibPNG.SwiftFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/Objects-normal/arm64/LibPNG.SwiftConstValuesFileList (in target 'LibPNG' from project 'LibPNG')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/Objects-normal/arm64/LibPNG.SwiftConstValuesFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/Objects-normal/arm64/LibPNG_const_extract_protocols.json (in target 'LibPNG' from project 'LibPNG')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/Objects-normal/arm64/LibPNG_const_extract_protocols.json
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/Objects-normal/arm64/LibPNG.LinkFileList (in target 'LibPNG' from project 'LibPNG')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/Objects-normal/arm64/LibPNG.LinkFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/Objects-normal/arm64/LibPNG-OutputFileMap.json (in target 'LibPNG' from project 'LibPNG')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/Objects-normal/arm64/LibPNG-OutputFileMap.json
Copy /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/GeneratedModuleMaps/LibPNG.modulemap /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/LibPNG.modulemap (in target 'LibPNG' from project 'LibPNG')
    cd /Users/admin/builder/spi-builder-workspace
    builtin-copy -exclude .DS_Store -exclude CVS -exclude .svn -exclude .git -exclude .hg -resolve-src-symlinks /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/LibPNG.modulemap /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/GeneratedModuleMaps
SwiftDriver LibPNG normal arm64 com.apple.xcode.tools.swift.compiler (in target 'LibPNG' from project 'LibPNG')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-SwiftDriver -- /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc -module-name LibPNG -Onone -enforce-exclusivity\=checked @/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/Objects-normal/arm64/LibPNG.SwiftFileList -DSWIFT_PACKAGE -DDEBUG -DSWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -Xcc -fmodule-map-file\=/Users/admin/builder/spi-builder-workspace/Sources/CLibPNG/module.modulemap -DXcode -plugin-path /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins/testing -enable-experimental-feature DebugDescriptionMacro -sdk /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX26.0.sdk -target arm64-apple-macos10.13 -g -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -Xfrontend -serialize-debugging-options -profile-coverage-mapping -profile-generate -enable-testing -index-store-path /Users/admin/builder/spi-builder-workspace/.derivedData/Index.noindex/DataStore -swift-version 5 -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug -I /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug -F /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks -c -j10 -enable-batch-mode -incremental -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/macosx26.0-25A5279m-f7c1d129d9d5414f2afbbad1fd6fd62e.sdkstatcache -output-file-map /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/Objects-normal/arm64/LibPNG-OutputFileMap.json -use-frontend-parseable-output -save-temps -no-color-diagnostics -explicit-module-build -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SwiftExplicitPrecompiledModules -clang-scanner-module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -sdk-module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -serialize-diagnostics -emit-dependencies -emit-module -emit-module-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/Objects-normal/arm64/LibPNG.swiftmodule -validate-clang-modules-once -clang-build-session-file /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/Session.modulevalidation -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/swift-overrides.hmap -emit-const-values -Xfrontend -const-gather-protocols-file -Xfrontend /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/Objects-normal/arm64/LibPNG_const_extract_protocols.json -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -emit-objc-header -emit-objc-header-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/Objects-normal/arm64/LibPNG-Swift.h -working-directory /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode -experimental-emit-module-separately -disable-cmo
error: Clang dependency scanner failure: While building module 'CLibPNG' imported from CLibPNG-559a6d14.input:1:
In file included from <module-includes>:1:
/Users/admin/builder/spi-builder-workspace/Sources/CLibPNG/libpng.h:1:10: fatal error: 'png.h' file not found
CLibPNG-559a6d14.input:1:1: fatal error: could not build module 'CLibPNG'
 (in target 'LibPNG' from project 'LibPNG')
/Users/admin/builder/spi-builder-workspace/Sources/LibPNG/LibPNG+FromData.swift:1:8: error: Unable to find module dependency: 'CLibPNG'
import CLibPNG
       ^ (in target 'LibPNG' from project 'LibPNG')
/Users/admin/builder/spi-builder-workspace/Sources/LibPNG/LibPNG+FromData.swift:1:8: note: A dependency of main module 'LibPNG'
import CLibPNG
       ^ (in target 'LibPNG' from project 'LibPNG')
/Users/admin/builder/spi-builder-workspace/Sources/LibPNG/LibPNG.swift:5:8: note: Also imported here
import CLibPNG
       ^ (in target 'LibPNG' from project 'LibPNG')
--- xcodebuild: WARNING: Using the first of multiple matching destinations:
{ platform:macOS, arch:arm64, id:68569203b2caaf31ec6683af795397ac0d407c13, name:My Mac }
{ platform:macOS, arch:arm64, variant:Mac Catalyst, id:68569203b2caaf31ec6683af795397ac0d407c13, name:My Mac }
{ platform:macOS, arch:arm64, variant:DriverKit, id:68569203b2caaf31ec6683af795397ac0d407c13, name:My Mac }
{ platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:68569203b2caaf31ec6683af795397ac0d407c13, name:My Mac }
error: Clang dependency scanner failure: While building module 'CLibPNG' imported from CLibPNG-559a6d14.input:1:
In file included from <module-includes>:1:
/Users/admin/builder/spi-builder-workspace/Sources/CLibPNG/libpng.h:1:10: fatal error: 'png.h' file not found
CLibPNG-559a6d14.input:1:1: fatal error: could not build module 'CLibPNG'
/Users/admin/builder/spi-builder-workspace/Sources/LibPNG/LibPNG+FromData.swift:1:8: error: Unable to find module dependency: 'CLibPNG'
import CLibPNG
       ^
/Users/admin/builder/spi-builder-workspace/Sources/LibPNG/LibPNG+FromData.swift:1:8: note: a dependency of main module 'LibPNG'
import CLibPNG
       ^
/Users/admin/builder/spi-builder-workspace/Sources/LibPNG/LibPNG.swift:5:8: note: also imported here
import CLibPNG
       ^
** BUILD FAILED **
The following build commands failed:
	SwiftDriver LibPNG normal arm64 com.apple.xcode.tools.swift.compiler (in target 'LibPNG' from project 'LibPNG')
	Building workspace spi-builder-workspace with scheme LibPNG
(2 failures)
Command line invocation:
    /Applications/Xcode-26.0.0-Beta.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 libpng using your system-packager:
    brew install libpng
Resolved source packages:
  LibPNG: /Users/admin/builder/spi-builder-workspace
resolved source packages: LibPNG
{
  "dependencies" : [
  ],
  "manifest_display_name" : "LibPNG",
  "name" : "LibPNG",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "LibPNG",
      "targets" : [
        "LibPNG"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "CLibPNG",
      "targets" : [
        "CLibPNG"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "LibPNGTests",
      "module_type" : "SwiftTarget",
      "name" : "LibPNGTests",
      "path" : "Tests/LibPNGTests",
      "sources" : [
        "LibPNGTests.swift"
      ],
      "target_dependencies" : [
        "LibPNG"
      ],
      "type" : "test"
    },
    {
      "c99name" : "LibPNG",
      "module_type" : "SwiftTarget",
      "name" : "LibPNG",
      "path" : "Sources/LibPNG",
      "product_memberships" : [
        "LibPNG"
      ],
      "sources" : [
        "LibPNG+FromData.swift",
        "LibPNG.swift"
      ],
      "target_dependencies" : [
        "CLibPNG"
      ],
      "type" : "library"
    },
    {
      "c99name" : "CLibPNG",
      "module_type" : "SystemLibraryTarget",
      "name" : "CLibPNG",
      "path" : "Sources/CLibPNG",
      "product_memberships" : [
        "LibPNG",
        "CLibPNG"
      ],
      "sources" : [
      ],
      "type" : "system-target"
    }
  ],
  "tools_version" : "5.4"
}
{
  "workspace" : {
    "name" : "spi-builder-workspace",
    "schemes" : [
      "LibPNG"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-26.0.0-Beta.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme LibPNG -destination platform=macOS,arch=arm64
Command line invocation:
    /Applications/Xcode-26.0.0-Beta.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 LibPNG -destination platform=macOS,arch=arm64
Resolve Package Graph
failed to retrieve search paths with pkg-config; maybe pkg-config is not installedyou may be able to install libpng using your system-packager:
    brew install libpng
Resolved source packages:
  LibPNG: /Users/admin/builder/spi-builder-workspace
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (3 targets)
    Target 'LibPNG' in project 'LibPNG'
        ➜ Explicit dependency on target 'LibPNG' in project 'LibPNG'
    Target 'LibPNG' in project 'LibPNG'
        ➜ Explicit dependency on target 'CLibPNG' in project 'LibPNG'
    Target 'CLibPNG' in project 'LibPNG' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
ClangStatCache /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang-stat-cache /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX26.0.sdk /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/macosx26.0-25A5279m-f7c1d129d9d5414f2afbbad1fd6fd62e.sdkstatcache
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang-stat-cache /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX26.0.sdk -o /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/macosx26.0-25A5279m-f7c1d129d9d5414f2afbbad1fd6fd62e.sdkstatcache
SwiftDriver LibPNG normal arm64 com.apple.xcode.tools.swift.compiler (in target 'LibPNG' from project 'LibPNG')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-SwiftDriver -- /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc -module-name LibPNG -Onone -enforce-exclusivity\=checked @/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/Objects-normal/arm64/LibPNG.SwiftFileList -DSWIFT_PACKAGE -DDEBUG -DSWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -Xcc -fmodule-map-file\=/Users/admin/builder/spi-builder-workspace/Sources/CLibPNG/module.modulemap -DXcode -plugin-path /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins/testing -enable-experimental-feature DebugDescriptionMacro -sdk /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX26.0.sdk -target arm64-apple-macos10.13 -g -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -Xfrontend -serialize-debugging-options -profile-coverage-mapping -profile-generate -enable-testing -index-store-path /Users/admin/builder/spi-builder-workspace/.derivedData/Index.noindex/DataStore -swift-version 5 -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug -I /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug -F /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks -c -j10 -enable-batch-mode -incremental -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/macosx26.0-25A5279m-f7c1d129d9d5414f2afbbad1fd6fd62e.sdkstatcache -output-file-map /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/Objects-normal/arm64/LibPNG-OutputFileMap.json -use-frontend-parseable-output -save-temps -no-color-diagnostics -explicit-module-build -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SwiftExplicitPrecompiledModules -clang-scanner-module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -sdk-module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -serialize-diagnostics -emit-dependencies -emit-module -emit-module-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/Objects-normal/arm64/LibPNG.swiftmodule -validate-clang-modules-once -clang-build-session-file /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/Session.modulevalidation -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/swift-overrides.hmap -emit-const-values -Xfrontend -const-gather-protocols-file -Xfrontend /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/Objects-normal/arm64/LibPNG_const_extract_protocols.json -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -emit-objc-header -emit-objc-header-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/LibPNG.build/Debug/LibPNG.build/Objects-normal/arm64/LibPNG-Swift.h -working-directory /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode -experimental-emit-module-separately -disable-cmo
error: Clang dependency scanner failure: While building module 'CLibPNG' imported from CLibPNG-9434d887.input:1:
In file included from <module-includes>:1:
/Users/admin/builder/spi-builder-workspace/Sources/CLibPNG/libpng.h:1:10: fatal error: 'png.h' file not found
CLibPNG-9434d887.input:1:1: fatal error: could not build module 'CLibPNG'
 (in target 'LibPNG' from project 'LibPNG')
/Users/admin/builder/spi-builder-workspace/Sources/LibPNG/LibPNG+FromData.swift:1:8: error: Unable to find module dependency: 'CLibPNG'
import CLibPNG
       ^ (in target 'LibPNG' from project 'LibPNG')
/Users/admin/builder/spi-builder-workspace/Sources/LibPNG/LibPNG+FromData.swift:1:8: note: A dependency of main module 'LibPNG'
import CLibPNG
       ^ (in target 'LibPNG' from project 'LibPNG')
/Users/admin/builder/spi-builder-workspace/Sources/LibPNG/LibPNG.swift:5:8: note: Also imported here
import CLibPNG
       ^ (in target 'LibPNG' from project 'LibPNG')
--- xcodebuild: WARNING: Using the first of multiple matching destinations:
{ platform:macOS, arch:arm64, id:68569203b2caaf31ec6683af795397ac0d407c13, name:My Mac }
{ platform:macOS, arch:arm64, variant:Mac Catalyst, id:68569203b2caaf31ec6683af795397ac0d407c13, name:My Mac }
{ platform:macOS, arch:arm64, variant:DriverKit, id:68569203b2caaf31ec6683af795397ac0d407c13, name:My Mac }
{ platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:68569203b2caaf31ec6683af795397ac0d407c13, name:My Mac }
error: Clang dependency scanner failure: While building module 'CLibPNG' imported from CLibPNG-9434d887.input:1:
In file included from <module-includes>:1:
/Users/admin/builder/spi-builder-workspace/Sources/CLibPNG/libpng.h:1:10: fatal error: 'png.h' file not found
CLibPNG-9434d887.input:1:1: fatal error: could not build module 'CLibPNG'
/Users/admin/builder/spi-builder-workspace/Sources/LibPNG/LibPNG+FromData.swift:1:8: error: Unable to find module dependency: 'CLibPNG'
import CLibPNG
       ^
/Users/admin/builder/spi-builder-workspace/Sources/LibPNG/LibPNG+FromData.swift:1:8: note: a dependency of main module 'LibPNG'
import CLibPNG
       ^
/Users/admin/builder/spi-builder-workspace/Sources/LibPNG/LibPNG.swift:5:8: note: also imported here
import CLibPNG
       ^
** BUILD FAILED **
The following build commands failed:
	SwiftDriver LibPNG normal arm64 com.apple.xcode.tools.swift.compiler (in target 'LibPNG' from project 'LibPNG')
	Building workspace spi-builder-workspace with scheme LibPNG
(2 failures)
BUILD FAILURE 6.2 macosXcodebuild