Swift Package Index

Build Information

Failed to build LibPNG, reference master (f5b1a8), with Swift 6.3 for macOS (SPM) on 11 Apr 2026 15:27:30 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-26.4.0.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
========================================
Builder version: 4.70.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/KrakenCL/LibPNG.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/KrakenCL/LibPNG
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at f5b1a8c Delete .swiftpm/xcode/package.xcworkspace directory
Cloned https://github.com/KrakenCL/LibPNG.git
Revision (git rev-parse @):
f5b1a8ca56ffa6a8229eada39c4d543fb60f42d4
SUCCESS checkout https://github.com/KrakenCL/LibPNG.git at master
========================================
ResolveProductDependencies
========================================
Resolving dependencies ...
{
  "identity": ".resolve-product-dependencies",
  "name": "resolve-dependencies",
  "url": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "version": "unspecified",
  "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "traits": [
    "default"
  ],
  "dependencies": [
    {
      "identity": "libpng",
      "name": "LibPNG",
      "url": "https://github.com/KrakenCL/LibPNG.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/LibPNG",
      "traits": [
        "default"
      ],
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/KrakenCL/LibPNG.git
[1/57] Fetching libpng
Fetched https://github.com/KrakenCL/LibPNG.git from cache (0.58s)
Creating working copy for https://github.com/KrakenCL/LibPNG.git
Working copy of https://github.com/KrakenCL/LibPNG.git resolved at master (f5b1a8c)
warning: '.resolve-product-dependencies': dependency 'libpng' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.3
Building package at path:  $PWD
https://github.com/KrakenCL/LibPNG.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-26.4.0.app xcrun swift build --arch arm64
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version--6988338F2F200930.txt
error: emit-module command failed with exit code 1 (use -v to see invocation)
[3/4] Emitting module LibPNG
/Users/admin/builder/spi-builder-workspace/Library/CPNG/module.modulemap:2:10: error: header '/usr/local/include/png.h' not found
1 | module CPNG [system] {
2 |   header "/usr/local/include/png.h"
  |          `- error: header '/usr/local/include/png.h' not found
3 |   link "png"
4 |   export *
/Users/admin/builder/spi-builder-workspace/Sources/LibPNG/LibPNG.swift:19:8: error: could not build Objective-C module 'CPNG'
 17 |
 18 | import Foundation
 19 | import CPNG
    |        `- error: could not build Objective-C module 'CPNG'
 20 |
 21 | public typealias Pixel = UInt8
[4/4] Compiling LibPNG LibPNG.swift
/Users/admin/builder/spi-builder-workspace/Library/CPNG/module.modulemap:2:10: error: header '/usr/local/include/png.h' not found
1 | module CPNG [system] {
2 |   header "/usr/local/include/png.h"
  |          `- error: header '/usr/local/include/png.h' not found
3 |   link "png"
4 |   export *
/Users/admin/builder/spi-builder-workspace/Sources/LibPNG/LibPNG.swift:19:8: error: could not build Objective-C module 'CPNG'
 17 |
 18 | import Foundation
 19 | import CPNG
    |        `- error: could not build Objective-C module 'CPNG'
 20 |
 21 | public typealias Pixel = UInt8
warning: failed to retrieve search paths with pkg-config; maybe pkg-config is not installed
warning: you may be able to install libpng using your system-packager:
    brew install libpng
warning: you may be able to install libpng using your system-packager:
    brew install libpng
BUILD FAILURE 6.3 macosSpm