1

When trying to build the toolchain for current main using swift/utils/build-toolchain and swift-5.10-RELEASE-ubuntu22.04 on Ubuntu 24.04 LTS, I get weird compilation errors:

/home/bastian/Documents/swift/swift-corelibs-foundation/Sources/Foundation/Port.swift:95:37: error: module 'Glibc' has no member named 'SOCK_STREAM'
  93 | #if canImport(Glibc) && !os(Android) && !os(OpenBSD)
  94 | import Glibc
  95 | fileprivate let SOCK_STREAM = Int32(Glibc.SOCK_STREAM.rawValue)
     |                                     `- error: module 'Glibc' has no member named 'SOCK_STREAM'
  96 | fileprivate let SOCK_DGRAM  = Int32(Glibc.SOCK_DGRAM.rawValue)
  97 | fileprivate let IPPROTO_TCP = Int32(Glibc.IPPROTO_TCP)

/home/bastian/Documents/swift/swift-corelibs-foundation/Sources/Foundation/Port.swift:96:37: error: module 'Glibc' has no member named 'SOCK_DGRAM'
  94 | import Glibc
  95 | fileprivate let SOCK_STREAM = Int32(Glibc.SOCK_STREAM.rawValue)
  96 | fileprivate let SOCK_DGRAM  = Int32(Glibc.SOCK_DGRAM.rawValue)
     |                                     `- error: module 'Glibc' has no member named 'SOCK_DGRAM'
  97 | fileprivate let IPPROTO_TCP = Int32(Glibc.IPPROTO_TCP)
  98 | #endif

I checked that all dependencies are installed, and also couldn't find anything related to it here, on GitHub, or elsewhere.

Does anyone know how to resolve this?

2

We're aware of the issue with the main and 6.0 compilers. Unfortunately, I don't have a workaround or fix yet.

3

@futurejones, you have 5.9 and 5.10 building for 24.04, any idea about this Swift 6 issue?

4

We have official images for 5.10 on 24.04. Something changed in both the clang importer, and the glibc header layout that is causing swift (main and 6.0) to import SOCK_DGRAM and SOCK_STREAM through CoreFoundation instead of glibc.

Okay, I lied, there is a hack-around, but you’ll hate your life if you try using it because C imports won’t consistently import through the same modules. You can replace the glibc.SOCK_DGRAM/SOCK_STREAM with CoreFoundation.SOCK_DGRAM/SOCK_STREAM. The overarching issue is that the glibc headers aren’t modular and clang keeps getting stricter about modularity. This isn’t an issue for clang because you don’t have to pass -fmodules and you’ll get normal include behavior. This is an issue for swift because we have to import as modules.

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