Unable to build static executable on Linux

[asponring]

New Issue Checklist

• Updated SwiftLint to the latest version
• I searched for existing GitHub issues

Describe the bug

I am unable to build a fully static / standalone executable of SwiftLint for Linux. SwiftLint works fine on Linux for me as long as Swift is installed, but I need a version that works on Linux even if Swift is not installed.

There are previously opened issues that pertain to standalone versions of SwiftLint (#302 and #731), but they are quite old at this point. This comment mentions that the blocker to supporting this was having SourceKit included in Linux versions of Swift - which is now resolved according to this ticket: swiftlang/swift#8189.

Yet I still get an error every time I try to build a statically executable binary. The below output shows me using swift build on a Linux machine with the standard build flags --configuration release -Xlinker -dead_strip, adding -Xswiftc -static-executable to ensure it's a static binary. The error shows up at the bottom. I'm using the latest versions of Swift and SwiftLint - see environment details at the bottom.

Is some additional step needed to get this to work or is it simply not possible as things currently are? Thanks in advance.

~/SwiftLint$ swift build --configuration release -Xlinker -dead_strip -Xswiftc -static-executable
Fetching https://github.com/jpsim/Yams.git
Fetching https://github.com/apple/swift-syntax.git
Fetching https://github.com/jpsim/SourceKitten.git
[28924/28924] Fetching objects
Fetched https://github.com/apple/swift-syntax.git (0.90s)
Fetching https://github.com/apple/swift-argument-parser.git
Fetched https://github.com/jpsim/SourceKitten.git (0.91s)
Fetching https://github.com/scottrhoyt/SwiftyTextTable.git
Fetched https://github.com/jpsim/Yams.git (0.92s)
Fetching https://github.com/drmohundro/SWXMLHash.git
[2903/3567] Fetching objectsFetched https://github.com/scottrhoyt/SwiftyTextTable.git (0.18s)
[2957/3567] Fetching objectsFetching https://github.com/krzyzanowskim/CryptoSwift.git
[3567/3567] Fetching objects
Fetched https://github.com/drmohundro/SWXMLHash.git (0.25s)
[11878/19984] Fetching objectsFetched https://github.com/apple/swift-argument-parser.git (0.60s)
[19984/19984] Fetching objects
Fetched https://github.com/krzyzanowskim/CryptoSwift.git (0.96s)
Computing version for https://github.com/krzyzanowskim/CryptoSwift.git
Computed https://github.com/krzyzanowskim/CryptoSwift.git at 1.4.3 (0.17s)
Computing version for https://github.com/scottrhoyt/SwiftyTextTable.git
Computed https://github.com/scottrhoyt/SwiftyTextTable.git at 0.9.0 (0.57s)
Computing version for https://github.com/jpsim/Yams.git
Computed https://github.com/jpsim/Yams.git at 4.0.6 (0.16s)
Computing version for https://github.com/jpsim/SourceKitten.git
Computed https://github.com/jpsim/SourceKitten.git at 0.32.0 (0.17s)
Computing version for https://github.com/apple/swift-syntax.git
Computed https://github.com/apple/swift-syntax.git at 0.50600.1 (0.36s)
Computing version for https://github.com/apple/swift-argument-parser.git
Computed https://github.com/apple/swift-argument-parser.git at 1.0.3 (0.17s)
Computing version for https://github.com/drmohundro/SWXMLHash.git
Computed https://github.com/drmohundro/SWXMLHash.git at 6.0.0 (0.16s)
Creating working copy for https://github.com/scottrhoyt/SwiftyTextTable.git
Working copy of https://github.com/scottrhoyt/SwiftyTextTable.git resolved at 0.9.0
Creating working copy for https://github.com/drmohundro/SWXMLHash.git
Working copy of https://github.com/drmohundro/SWXMLHash.git resolved at 6.0.0
Creating working copy for https://github.com/apple/swift-syntax.git
Working copy of https://github.com/apple/swift-syntax.git resolved at 0.50600.1
Creating working copy for https://github.com/jpsim/Yams.git
Working copy of https://github.com/jpsim/Yams.git resolved at 4.0.6
Creating working copy for https://github.com/jpsim/SourceKitten.git
Working copy of https://github.com/jpsim/SourceKitten.git resolved at 0.32.0
Creating working copy for https://github.com/krzyzanowskim/CryptoSwift.git
Working copy of https://github.com/krzyzanowskim/CryptoSwift.git resolved at 1.4.3
Creating working copy for https://github.com/apple/swift-argument-parser.git
Working copy of https://github.com/apple/swift-argument-parser.git resolved at 1.0.3
Building for production...
/home/ubuntu/SwiftLint/.build/checkouts/swift-syntax/Sources/SwiftSyntaxParser/CNodes.swift:13:29: error: no such module '_InternalSwiftSyntaxParser'
@_implementationOnly import _InternalSwiftSyntaxParser
                            ^
[27/29] Archiving libSwiftSyntax.a

Environment

• SwiftLint version - Current (0.47.1)
• Installation method used - build from source
• Swift version - Current (5.6.1)
• Ubuntu version - 20.04
• Architecture - x86

[dpatz]

I'm having the same issue, were you ever able to get this resolved?

[asponring]

Thanks for asking, @dpatz. Unfortunately I'm still having the same issue.

[bradleymackey]

I'm looking into creating a static binary as part of creating an arm64 linux build. We appear to currently be blocked on jpsim/Yams#429

[bradleymackey]

Reproduction: produces the following build error on this branch when running: docker buildx build -t myswiftlint --platform=linux/arm64 .

 > [builder 5/5] RUN --mount=type=cache,target=/workspace/.build,id=build-linux/arm64   ./tools/build-linux-release.sh &&       cp /workspace/.build/release/swiftlint /workspace:
1.435 Building for production...
2.939 [0/5] Write swift-version-24593BA9C3E375BF.txt
3.624 [2/11] Compiling Yams Constructor.swift
3.624 /workspace/.build/checkouts/Yams/Sources/Yams/Representer.swift:23:8: error: no such module 'Glibc'
3.624  21 | #else
3.624  22 | import CoreFoundation
3.624  23 | import Glibc
3.624     |        `- error: no such module 'Glibc'
3.624  24 | private let cpow: (_: Double, _: Double) -> Double = Glibc.pow
3.624  25 | #endif