LibPNG – Build Information – Swift Package Index

Build Information

Failed to build LibPNG, reference 0.0.3 (9941ab), with Swift 6.4 for macOS (SPM) on 17 Sep 2026 03:09:03 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
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Builder version: 5.1.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/KrakenCL/LibPNG.git
Reference: 0.0.3
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/KrakenCL/LibPNG
 * tag               0.0.3      -> FETCH_HEAD
HEAD is now at 9941abf Improve normalization.
Cloned https://github.com/KrakenCL/LibPNG.git
Revision (git rev-parse @):
9941abff1c1683f0da3358a12f614bd7ce3b5780
SUCCESS checkout https://github.com/KrakenCL/LibPNG.git at 0.0.3
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Build
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Selected platform:         macosSpm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/KrakenCL/LibPNG.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun swift build --arch arm64
Building for debugging...
[Pre-planning 1 / 67]
[Planning deferred tasks]
[19 / 28]
warning: 'spi-builder-workspace': failed to retrieve search paths with pkg-config; maybe pkg-config is not installed
warning: 'spi-builder-workspace': you may be able to install libpng using your system-packager:
    brew install libpng
error: SwiftCompile normal arm64 failed with a nonzero exit code. Command line:     cd /Users/admin/builder

/Users/admin/builder/spi-builder-workspace/Library/CPNG/module.modulemap:2:10: [1;31merror: [1;39mheader '/usr/local/include/png.h' not found[0;0m
[0;36m1 |[0;0m module CPNG [system] {
[0;36m2 |[0;0m   header "/usr/local/include/png.h"
  [0;36m|[0;0m          `- [1;31merror: [1;39mheader '/usr/local/include/png.h' not found[0;0m
[0;36m3 |[0;0m   link "png"
[0;36m4 |[0;0m   export *
/Users/admin/builder/spi-builder-workspace/Sources/LibPNG/LibPNG.swift:19:8: [1;31merror: [1;39mcould not build Objective-C module 'CPNG'[0;0m
 [0;36m17 |[0;0m
 [0;36m18 |[0;0m import Foundation
 [0;36m19 |[0;0m import CPNG
    [0;36m|[0;0m        `- [1;31merror: [1;39mcould not build Objective-C module 'CPNG'[0;0m
 [0;36m20 |[0;0m
 [0;36m21 |[0;0m public typealias Pixel = UInt8
Failed frontend command:
/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend -frontend -emit-module -experimental-skip-non-inlinable-function-bodies-without-types /Users/admin/builder/spi-builder-workspace/Sources/LibPNG/LibPNG.swift -target arm64-apple-macos12.0 -Xllvm -aarch64-use-tbi -enable-objc-interop -stack-check -sdk /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk -I /Users/admin/builder/spi-builder-workspace/.build/out/Products/Debug -Isystem /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.build/out/Products/Debug -F /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks -module-cache-path /Users/admin/builder/spi-builder-workspace/.build/out/ModuleCache.noindex -color-diagnostics -Xcc -fcolor-diagnostics -enable-testing -g -debug-info-format\=dwarf -dwarf-version\=4 -swift-version 4.2 -Onone -D SWIFT_PACKAGE -D DEBUG -D SWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -D Xcode -serialize-debugging-options -enable-experimental-feature DebugDescriptionMacro -empty-abi-descriptor -plugin-path /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins/testing -validate-clang-modules-once -clang-build-session-file /Users/admin/builder/spi-builder-workspace/.build/out/ModuleCache.noindex/Session.modulevalidation -Xcc -working-directory -Xcc /Users/admin/builder -enable-anonymous-context-mangled-names -file-compilation-dir /Users/admin/builder -Xcc -fmodule-map-file\=/Users/admin/builder/spi-builder-workspace/Library/CPNG/module.modulemap -Xcc -D_LIBCPP_HARDENING_MODE\=_LIBCPP_HARDENING_MODE_DEBUG -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.build/out/SDKStatCaches.noindex/macosx27.0-26A425-80c5bbf1d171475443272936d42f90a36a22442a12e9d48fe1a705f55a1adfc4.sdkstatcache -Xcc -fmodules-prune-interval\=86400 -Xcc -fmodules-prune-after\=345600 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Products/Debug/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/LibPNG.build/Debug/LibPNG-t.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/LibPNG.build/Debug/LibPNG-t.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/LibPNG.build/Debug/LibPNG-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name LibPNG -const-gather-protocols-file /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/LibPNG.build/Debug/LibPNG-t.build/Objects-normal/arm64/LibPNG_const_extract_protocols.json -disable-clang-spi -target-sdk-version 27.0 -target-sdk-name macosx27.0 -external-plugin-path /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins\#/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server -external-plugin-path /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/local/lib/swift/host/plugins\#/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server -in-process-plugin-server-path /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/libSwiftInProcPluginServer.dylib -plugin-path /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins -plugin-path /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/local/lib/swift/host/plugins -emit-module-doc-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/LibPNG.build/Debug/LibPNG-t.build/Objects-normal/arm64/LibPNG.swiftdoc -emit-module-source-info-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/LibPNG.build/Debug/LibPNG-t.build/Objects-normal/arm64/LibPNG.swiftsourceinfo -emit-objc-header-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/LibPNG.build/Debug/LibPNG-t.build/Objects-normal/arm64/LibPNG-Swift.h -serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/LibPNG.build/Debug/LibPNG-t.build/Objects-normal/arm64/LibPNG-primary-emit-module.dia -emit-dependencies-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/LibPNG.build/Debug/LibPNG-t.build/Objects-normal/arm64/LibPNG-primary-emit-module.d -parse-as-library -o /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/LibPNG.build/Debug/LibPNG-t.build/Objects-normal/arm64/LibPNG.swiftmodule -emit-abi-descriptor-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/LibPNG.build/Debug/LibPNG-t.build/Objects-normal/arm64/LibPNG.abi.json
error: Build failed
BUILD FAILURE 6.4 macosSpm