ld: symbol(s) not found with package using `Bundle.module`

[kientux]

For example, when integrate Siren package, which use Bundle.module here, the linker step will produce error:

Undefined symbols for architecture arm64:
  "static (extension in Siren):__C.NSBundle.module : __C.NSBundle", referenced from:
      function signature specialization <Arg[1] = Dead> of static (extension in Siren):__C.NSBundle.(sirenForcedBundlePath in _9C775CF4CEC7A5F21E625F58C71BDF22)(forceLanguageLocalization: Siren.Localization.Language) -> Swift.String? in libSiren_a_file.a(BundleExtension.swift.o)
      function signature specialization <Arg[2] = Dead> of static (extension in Siren):__C.NSBundle.localizedString(forKey: Swift.String, andForceLocalization: Siren.Localization.Language?) -> Swift.String in libSiren_a_file.a(BundleExtension.swift.o)
  "one-time initialization function for module", referenced from:
      function signature specialization <Arg[1] = Dead> of static (extension in Siren):__C.NSBundle.(sirenForcedBundlePath in _9C775CF4CEC7A5F21E625F58C71BDF22)(forceLanguageLocalization: Siren.Localization.Language) -> Swift.String? in libSiren_a_file.a(BundleExtension.swift.o)
      function signature specialization <Arg[2] = Dead> of static (extension in Siren):__C.NSBundle.localizedString(forKey: Swift.String, andForceLocalization: Siren.Localization.Language?) -> Swift.String in libSiren_a_file.a(BundleExtension.swift.o)
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

When integrate 2 of my Swift packages which both use Bundle.module, it produces the same error. I have little knowledge about Bazel and just trying to migrate to using it, so I can only report this much information. Please tell me if you need more info.

WORKSPACE:

spm_repositories(
    name = "swift_pkgs",
    dependencies = [
        spm_pkg(
            name = "Siren",
            url = "https://github.com/ArtSabintsev/Siren",
            exact_version = "5.7.1",
            products = ["Siren"],
        ),
    ],
    platforms = [
        ".iOS(.v12)",
        ".macOS(.v10_14)"
    ]
)

BUILD:

load("@build_bazel_rules_apple//apple:ios.bzl", "ios_application")
load("@build_bazel_rules_swift//swift:swift.bzl", "swift_library")

swift_library(
    name = "App_Classes",
    srcs = glob([
        "*.swift",
    ]),
    data = [
    ],
    deps = [
        "@swift_pkgs//Siren",
    ],
)

ios_application(
    name = "ios_app",
    bundle_id = "io.github.kientux.bazel",
    families = ["iphone"],
    infoplists = ["Info.plist"],
    minimum_os_version = "12.0",
    visibility = ["//visibility:public"],
    deps = [
        ":App_Classes",
    ],
)

[cgrindel]

Thanks for reporting the issue. I hope to have some time to investigate later this week.

[Antonito]

Hello,

I am facing the same issue with another package that makes use of Bundle.module.
I worked around this scenario with my own SPM packages by adding:

import class Foundation.Bundle

#if !SWIFT_PACKAGE
extension Foundation.Bundle {
  fileprivate final class Token {}

  static var module: Bundle = .init(for: Token.self)
}
#endif

Has there been any progress on this issue?
If not, is there any workaround / solution for external dependencies ?

Thank you!

[cgrindel]

Unfortunately, no. I have been buried with some other projects. I am open to contributions, if you have thoughts on how to tackle this.