SwiftyModbus – Build Information

Track the adoption of Swift 6 strict concurrency checks for data race safety. How many packages are Ready for Swift 6?

Build Information

Failed to build SwiftyModbus, reference master (444406), with Swift 6.1 for macOS (SPM) on 27 Apr 2025 16:19:21 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/DimaRU/SwiftyModbus.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/DimaRU/SwiftyModbus
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 444406b Fix Package definition file errors for Xcode 15/Swift 5.9
Cloned https://github.com/DimaRU/SwiftyModbus.git
Revision (git rev-parse @):
444406bf0d43bf325073e892256c963e5bf77441
SUCCESS checkout https://github.com/DimaRU/SwiftyModbus.git at master
Fetching https://github.com/mxcl/PromiseKit.git
[1/17186] Fetching promisekit
Fetched https://github.com/mxcl/PromiseKit.git from cache (1.69s)
Computing version for https://github.com/mxcl/PromiseKit.git
Computed https://github.com/mxcl/PromiseKit.git at 6.22.1 (2.32s)
Creating working copy for https://github.com/mxcl/PromiseKit.git
Working copy of https://github.com/mxcl/PromiseKit.git resolved at 6.22.1
========================================
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",
  "dependencies": [
    {
      "identity": "swiftymodbus",
      "name": "SwiftyModbus",
      "url": "https://github.com/DimaRU/SwiftyModbus.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/SwiftyModbus",
      "dependencies": [
        {
          "identity": "promisekit",
          "name": "PromiseKit",
          "url": "https://github.com/mxcl/PromiseKit.git",
          "version": "6.22.1",
          "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/PromiseKit",
          "dependencies": [
          ]
        }
      ]
    }
  ]
}
Fetching https://github.com/DimaRU/SwiftyModbus.git
[1/177] Fetching swiftymodbus
Fetched https://github.com/DimaRU/SwiftyModbus.git from cache (0.86s)
Fetching https://github.com/mxcl/PromiseKit.git from cache
Fetched https://github.com/mxcl/PromiseKit.git from cache (0.48s)
Computing version for https://github.com/mxcl/PromiseKit.git
Computed https://github.com/mxcl/PromiseKit.git at 6.22.1 (0.56s)
Creating working copy for https://github.com/DimaRU/SwiftyModbus.git
Working copy of https://github.com/DimaRU/SwiftyModbus.git resolved at master (444406b)
Creating working copy for https://github.com/mxcl/PromiseKit.git
Working copy of https://github.com/mxcl/PromiseKit.git resolved at 6.22.1
warning: '.resolve-product-dependencies': dependency 'swiftymodbus' is not used by any target
Found 1 product dependencies
  - PromiseKit
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/DimaRU/SwiftyModbus.git
https://github.com/DimaRU/SwiftyModbus.git
{
  "dependencies" : [
    {
      "identity" : "promisekit",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "6.15.2",
            "upper_bound" : "7.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/mxcl/PromiseKit.git"
    }
  ],
  "manifest_display_name" : "SwiftyModbus",
  "name" : "SwiftyModbus",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "SwiftyModbusPromise",
      "targets" : [
        "SwiftyModbusPromise"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "SwiftyModbus",
      "targets" : [
        "SwiftyModbus"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SwiftyModbusTests",
      "module_type" : "SwiftTarget",
      "name" : "SwiftyModbusTests",
      "path" : "Tests/SwiftyModbusTests",
      "sources" : [
        "SwiftModbusTests.swift"
      ],
      "target_dependencies" : [
        "SwiftyModbus"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SwiftyModbusPromise",
      "module_type" : "SwiftTarget",
      "name" : "SwiftyModbusPromise",
      "path" : "Sources/SwiftyModbusPromise",
      "product_dependencies" : [
        "PromiseKit"
      ],
      "product_memberships" : [
        "SwiftyModbusPromise"
      ],
      "sources" : [
        "SwiftyModbusPromise.swift"
      ],
      "target_dependencies" : [
        "CModbus"
      ],
      "type" : "library"
    },
    {
      "c99name" : "SwiftyModbus",
      "module_type" : "SwiftTarget",
      "name" : "SwiftyModbus",
      "path" : "Sources/SwiftyModbus",
      "product_memberships" : [
        "SwiftyModbus"
      ],
      "sources" : [
        "SwiftyModbus.swift",
        "SwiftyModbusResult.swift"
      ],
      "target_dependencies" : [
        "CModbus"
      ],
      "type" : "library"
    },
    {
      "c99name" : "CModbus",
      "module_type" : "SystemLibraryTarget",
      "name" : "CModbus",
      "path" : "Sources/Libmodbus",
      "product_memberships" : [
        "SwiftyModbusPromise",
        "SwiftyModbus"
      ],
      "sources" : [
      ],
      "type" : "system-target"
    }
  ],
  "tools_version" : "5.3"
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures
Building for debugging...
[0/4] Write sources
[3/4] Write swift-version-2F0A5646E1D333AE.txt
[5/24] Compiling SwiftyModbus SwiftyModbusResult.swift
<module-includes>:1:9: note: in file included from <module-includes>:1:
1 | #import "libmodbus.h"
  |         `- note: in file included from <module-includes>:1:
2 |
/Users/admin/builder/spi-builder-workspace/Sources/Libmodbus/libmodbus.h:1:9: error: 'modbus.h' file not found
1 | #import <modbus.h>
  |         `- error: 'modbus.h' file not found
2 |
/Users/admin/builder/spi-builder-workspace/Sources/SwiftyModbus/SwiftyModbus.swift:9:8: error: could not build Objective-C module 'CModbus'
  7 |
  8 | import Foundation
  9 | import CModbus
    |        `- error: could not build Objective-C module 'CModbus'
 10 |
 11 | fileprivate let errorValue: Int32 = -1
error: emit-module command failed with exit code 1 (use -v to see invocation)
[6/24] Emitting module SwiftyModbus
<module-includes>:1:9: note: in file included from <module-includes>:1:
1 | #import "libmodbus.h"
  |         `- note: in file included from <module-includes>:1:
2 |
/Users/admin/builder/spi-builder-workspace/Sources/Libmodbus/libmodbus.h:1:9: error: 'modbus.h' file not found
1 | #import <modbus.h>
  |         `- error: 'modbus.h' file not found
2 |
/Users/admin/builder/spi-builder-workspace/Sources/SwiftyModbus/SwiftyModbus.swift:9:8: error: could not build Objective-C module 'CModbus'
  7 |
  8 | import Foundation
  9 | import CModbus
    |        `- error: could not build Objective-C module 'CModbus'
 10 |
 11 | fileprivate let errorValue: Int32 = -1
[7/24] Compiling SwiftyModbus SwiftyModbus.swift
<module-includes>:1:9: note: in file included from <module-includes>:1:
1 | #import "libmodbus.h"
  |         `- note: in file included from <module-includes>:1:
2 |
/Users/admin/builder/spi-builder-workspace/Sources/Libmodbus/libmodbus.h:1:9: error: 'modbus.h' file not found
1 | #import <modbus.h>
  |         `- error: 'modbus.h' file not found
2 |
/Users/admin/builder/spi-builder-workspace/Sources/SwiftyModbus/SwiftyModbus.swift:9:8: error: could not build Objective-C module 'CModbus'
  7 |
  8 | import Foundation
  9 | import CModbus
    |        `- error: could not build Objective-C module 'CModbus'
 10 |
 11 | fileprivate let errorValue: Int32 = -1
[8/24] Compiling PromiseKit race.swift
[9/24] Compiling PromiseKit hang.swift
[10/24] Compiling PromiseKit after.swift
[11/24] Compiling PromiseKit firstly.swift
[12/24] Compiling PromiseKit Resolver.swift
[13/24] Compiling PromiseKit Thenable.swift
[14/24] Compiling PromiseKit Catchable.swift
[15/24] Compiling PromiseKit Combine.swift
[16/24] Compiling PromiseKit Error.swift
[17/24] Compiling PromiseKit Guarantee.swift
[18/24] Emitting module PromiseKit
[19/24] Compiling PromiseKit Async.swift
[20/24] Compiling PromiseKit Box.swift
[21/24] Compiling PromiseKit LogEvent.swift
[22/24] Compiling PromiseKit Promise.swift
[23/24] Compiling PromiseKit Configuration.swift
[24/24] Compiling PromiseKit CustomStringConvertible.swift
warning: failed to retrieve search paths with pkg-config; maybe pkg-config is not installed
warning: you may be able to install libmodbus using your system-packager:
    brew install libmodbus
warning: you may be able to install libmodbus using your system-packager:
    brew install libmodbus
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version-2F0A5646E1D333AE.txt
[2/21] Compiling PromiseKit race.swift
[3/21] Compiling PromiseKit after.swift
[4/21] Compiling PromiseKit firstly.swift
[5/22] Compiling PromiseKit Async.swift
[6/22] Compiling PromiseKit Box.swift
error: emit-module command failed with exit code 1 (use -v to see invocation)
[7/22] Emitting module SwiftyModbus
<module-includes>:1:9: note: in file included from <module-includes>:1:
1 | #import "libmodbus.h"
  |         `- note: in file included from <module-includes>:1:
2 |
/Users/admin/builder/spi-builder-workspace/Sources/Libmodbus/libmodbus.h:1:9: error: 'modbus.h' file not found
1 | #import <modbus.h>
  |         `- error: 'modbus.h' file not found
2 |
/Users/admin/builder/spi-builder-workspace/Sources/SwiftyModbus/SwiftyModbus.swift:9:8: error: could not build Objective-C module 'CModbus'
  7 |
  8 | import Foundation
  9 | import CModbus
    |        `- error: could not build Objective-C module 'CModbus'
 10 |
 11 | fileprivate let errorValue: Int32 = -1
[8/22] Compiling SwiftyModbus SwiftyModbus.swift
<module-includes>:1:9: note: in file included from <module-includes>:1:
1 | #import "libmodbus.h"
  |         `- note: in file included from <module-includes>:1:
2 |
/Users/admin/builder/spi-builder-workspace/Sources/Libmodbus/libmodbus.h:1:9: error: 'modbus.h' file not found
1 | #import <modbus.h>
  |         `- error: 'modbus.h' file not found
2 |
/Users/admin/builder/spi-builder-workspace/Sources/SwiftyModbus/SwiftyModbus.swift:9:8: error: could not build Objective-C module 'CModbus'
  7 |
  8 | import Foundation
  9 | import CModbus
    |        `- error: could not build Objective-C module 'CModbus'
 10 |
 11 | fileprivate let errorValue: Int32 = -1
[9/22] Compiling SwiftyModbus SwiftyModbusResult.swift
<module-includes>:1:9: note: in file included from <module-includes>:1:
1 | #import "libmodbus.h"
  |         `- note: in file included from <module-includes>:1:
2 |
/Users/admin/builder/spi-builder-workspace/Sources/Libmodbus/libmodbus.h:1:9: error: 'modbus.h' file not found
1 | #import <modbus.h>
  |         `- error: 'modbus.h' file not found
2 |
/Users/admin/builder/spi-builder-workspace/Sources/SwiftyModbus/SwiftyModbus.swift:9:8: error: could not build Objective-C module 'CModbus'
  7 |
  8 | import Foundation
  9 | import CModbus
    |        `- error: could not build Objective-C module 'CModbus'
 10 |
 11 | fileprivate let errorValue: Int32 = -1
warning: failed to retrieve search paths with pkg-config; maybe pkg-config is not installed
warning: you may be able to install libmodbus using your system-packager:
    brew install libmodbus
warning: you may be able to install libmodbus using your system-packager:
    brew install libmodbus
BUILD FAILURE 6.1 macosSpm