Does not build

[mbledkowski]

I cannot build this demo. Here is the snippet of the swift run output:

Building for debugging...
Warning: duplicate type 'variant_get_gtype' for //gir:function ignored!
Warning: duplicate type 'language_from_string' for //gir:function ignored!
Warning: duplicate type 'language_get_default' for //gir:function ignored!
Warning: duplicate type 'shape' for //gir:function ignored!
Warning: duplicate type 'shape_full' for //gir:function ignored!
/home/mble/.build/SwiftHelloGtk/.build/plugins/outputs/swiftgtk/GLib/destination/gir2swift-plugin/gir2swift-generated/GLib/GLib-2.0-functions.swift:6360:18: error: 'g_open' is unavailable: Variadic function is unavailable
 6358 | /// See your C library manual for more details about `open()`.
 6359 | @inlinable public func open(filename: UnsafePointer<gchar>!, flags: Int, mode: Int) -> Int {
 6360 |     let result = g_open(filename, gint(flags), gint(mode))
      |                  `- error: 'g_open' is unavailable: Variadic function is unavailable
 6361 |     let rv = Int(result)
 6362 |     return rv

CGLib.g_open:2:13: note: 'g_open' has been explicitly marked unavailable here
1 | @available(*, unavailable, message: "Variadic function is unavailable")
2 | public func g_open(_: UnsafePointer<CChar>, _: Int32, _ varargs: Any...) -> Int32
  |             `- note: 'g_open' has been explicitly marked unavailable here
/home/mble/.build/SwiftHelloGtk/.build/plugins/outputs/swiftgtk/GLib/destination/gir2swift-plugin/gir2swift-generated/GLib/GLib-2.0-functions.swift:6360:18: error: 'g_open' is unavailable: Variadic function is unavailable
 6358 | /// See your C library manual for more details about `open()`.
 6359 | @inlinable public func open(filename: UnsafePointer<gchar>!, flags: Int, mode: Int) -> Int {
 6360 |     let result = g_open(filename, gint(flags), gint(mode))
      |                  `- error: 'g_open' is unavailable: Variadic function is unavailable
 6361 |     let rv = Int(result)
 6362 |     return rv

CGLib.g_open:2:13: note: 'g_open' has been explicitly marked unavailable here
1 | @available(*, unavailable, message: "Variadic function is unavailable")
2 | public func g_open(_: UnsafePointer<CChar>, _: Int32, _ varargs: Any...) -> Int32
  |             `- note: 'g_open' has been explicitly marked unavailable here
error: emit-module command failed with exit code 1 (use -v to see invocation)
/home/mble/.build/SwiftHelloGtk/.build/plugins/outputs/swiftgtk/GLib/destination/gir2swift-plugin/gir2swift-generated/GLib/GLib-2.0-functions.swift:6360:18: error: 'g_open' is unavailable: Variadic function is unavailable
 6358 | /// See your C library manual for more details about `open()`.
 6359 | @inlinable public func open(filename: UnsafePointer<gchar>!, flags: Int, mode: Int) -> Int {
 6360 |     let result = g_open(filename, gint(flags), gint(mode))
      |                  `- error: 'g_open' is unavailable: Variadic function is unavailable
 6361 |     let rv = Int(result)
 6362 |     return rv

CGLib.g_open:2:13: note: 'g_open' has been explicitly marked unavailable here
1 | @available(*, unavailable, message: "Variadic function is unavailable")
2 | public func g_open(_: UnsafePointer<CChar>, _: Int32, _ varargs: Any...) -> Int32
  |             `- note: 'g_open' has been explicitly marked unavailable here
[83/102] Converting Gtk Gtk-3.0.gir

Best regards,
Maciej Błędkowski

[rhx]

This seems to be a Linux issue. Can you give me a little bit more detail? Which version of Linux and which version of Swift are you trying to compile this with?

[mbledkowski]

I don't remember exactly, but I think it was Fedora 42 with Swift version 5 dot something

[alexmocanu]

Same thing happens to me.

Ubuntu 24.04.3
Swift 6.2.2

Errors:

[1/1] Planning build
Building for debugging...
Warning: duplicate type 'variant_get_gtype' for //gir:function ignored!
Warning: duplicate type 'language_from_string' for //gir:function ignored!
Warning: duplicate type 'language_get_default' for //gir:function ignored!
Warning: duplicate type 'shape' for //gir:function ignored!
Warning: duplicate type 'shape_full' for //gir:function ignored!
/home/alex/Desktop/testgtk4/.build/plugins/outputs/swiftglib/GLib/destination/gir2swift-plugin/gir2swift-generated/GLib/GLib-2.0-functions.swift:6285:18: error: 'g_open' is unavailable: Variadic function is unavailable
 6283 | /// See your C library manual for more details about `open()`.
 6284 | @inlinable public func open(filename: UnsafePointer<gchar>!, flags: Int, mode: Int) -> Int {
 6285 |     let result = g_open(filename, gint(flags), gint(mode))
      |                  `- error: 'g_open' is unavailable: Variadic function is unavailable
 6286 |     let rv = Int(result)
 6287 |     return rv

/home/alex/Desktop/testgtk4/.build/checkouts/SwiftGLib/Sources/CGLib/glib_bridging.h:8:12: note: 'g_open' has been explicitly marked unavailable here
  6 | #define g_open g_open_orig
  7 | #else
  8 | extern int g_open(const char *, int, ...) __nonnull ((1));
    |            `- note: 'g_open' has been explicitly marked unavailable here
  9 | #endif
 10 | #endif
/home/alex/Desktop/testgtk4/.build/plugins/outputs/swiftglib/GLib/destination/gir2swift-plugin/gir2swift-generated/GLib/GLib-2.0-functions.swift:6285:18: error: 'g_open' is unavailable: Variadic function is unavailable
 6283 | /// See your C library manual for more details about `open()`.
 6284 | @inlinable public func open(filename: UnsafePointer<gchar>!, flags: Int, mode: Int) -> Int {
 6285 |     let result = g_open(filename, gint(flags), gint(mode))
      |                  `- error: 'g_open' is unavailable: Variadic function is unavailable
 6286 |     let rv = Int(result)
 6287 |     return rv

/home/alex/Desktop/testgtk4/.build/checkouts/SwiftGLib/Sources/CGLib/glib_bridging.h:8:12: note: 'g_open' has been explicitly marked unavailable here
  6 | #define g_open g_open_orig
  7 | #else
  8 | extern int g_open(const char *, int, ...) __nonnull ((1));
    |            `- note: 'g_open' has been explicitly marked unavailable here
  9 | #endif
 10 | #endif
/home/alex/Desktop/testgtk4/.build/plugins/outputs/swiftglib/GLib/destination/gir2swift-plugin/gir2swift-generated/GLib/GLib-2.0-functions.swift:6285:18: error: 'g_open' is unavailable: Variadic function is unavailable
 6283 | /// See your C library manual for more details about `open()`.
 6284 | @inlinable public func open(filename: UnsafePointer<gchar>!, flags: Int, mode: Int) -> Int {
 6285 |     let result = g_open(filename, gint(flags), gint(mode))
      |                  `- error: 'g_open' is unavailable: Variadic function is unavailable
 6286 |     let rv = Int(result)
 6287 |     return rv

/home/alex/Desktop/testgtk4/.build/checkouts/SwiftGLib/Sources/CGLib/glib_bridging.h:8:12: note: 'g_open' has been explicitly marked unavailable here
  6 | #define g_open g_open_orig
  7 | #else
  8 | extern int g_open(const char *, int, ...) __nonnull ((1));
    |            `- note: 'g_open' has been explicitly marked unavailable here
  9 | #endif
 10 | #endif
/home/alex/Desktop/testgtk4/.build/plugins/outputs/swiftglib/GLib/destination/gir2swift-plugin/gir2swift-generated/GLib/GLib-2.0-functions.swift:6285:18: error: 'g_open' is unavailable: Variadic function is unavailable
 6283 | /// See your C library manual for more details about `open()`.
 6284 | @inlinable public func open(filename: UnsafePointer<gchar>!, flags: Int, mode: Int) -> Int {
 6285 |     let result = g_open(filename, gint(flags), gint(mode))
      |                  `- error: 'g_open' is unavailable: Variadic function is unavailable
 6286 |     let rv = Int(result)
 6287 |     return rv

/home/alex/Desktop/testgtk4/.build/checkouts/SwiftGLib/Sources/CGLib/glib_bridging.h:8:12: note: 'g_open' has been explicitly marked unavailable here
  6 | #define g_open g_open_orig
  7 | #else
  8 | extern int g_open(const char *, int, ...) __nonnull ((1));
    |            `- note: 'g_open' has been explicitly marked unavailable here
  9 | #endif
 10 | #endif
error: emit-module command failed with exit code 1 (use -v to see invocation)
/home/alex/Desktop/testgtk4/.build/plugins/outputs/swiftglib/GLib/destination/gir2swift-plugin/gir2swift-generated/GLib/GLib-2.0-functions.swift:6285:18: error: 'g_open' is unavailable: Variadic function is unavailable
 6283 | /// See your C library manual for more details about `open()`.
 6284 | @inlinable public func open(filename: UnsafePointer<gchar>!, flags: Int, mode: Int) -> Int {
 6285 |     let result = g_open(filename, gint(flags), gint(mode))
      |                  `- error: 'g_open' is unavailable: Variadic function is unavailable
 6286 |     let rv = Int(result)
 6287 |     return rv

/home/alex/Desktop/testgtk4/.build/checkouts/SwiftGLib/Sources/CGLib/glib_bridging.h:8:12: note: 'g_open' has been explicitly marked unavailable here
  6 | #define g_open g_open_orig
  7 | #else
  8 | extern int g_open(const char *, int, ...) __nonnull ((1));
    |            `- note: 'g_open' has been explicitly marked unavailable here
  9 | #endif
 10 | #endif
Warning: duplicate type 'check_version' for //gir:function ignored!
Warning: duplicate type 'test_init' for //gir:function ignored!
[233/261] Converting Gtk Gtk-4.0.gir

Package.swift (Created with swift package manager 6.1, then later I upgraded to 6.2.2)

// swift-tools-version: 6.1
// The swift-tools-version declares the minimum version of Swift required to build this package.

import PackageDescription

let package = Package(
    name: "testgtk4",
    dependencies: [
        .package(url: "https://github.com/rhx/gir2swift.git", branch: "main"),
        .package(url: "https://github.com/rhx/SwiftGtk.git",  branch: "gtk4"),
    ],    
    targets: [
        // Targets are the basic building blocks of a package, defining a module or a test suite.
        // Targets can depend on other targets in this package and products from dependencies.
        .executableTarget(
            name: "testgtk4",
            dependencies: [
                .product(name: "Gtk", package: "SwiftGtk")
            ]            
        ),
    ]
)

Sample code:

import Gtk

let status = Application.run(startupHandler: nil) { app in
    let window = ApplicationWindowRef(application: app)
    window.title = "Hello, world"
    window.setDefaultSize(width: 320, height: 240)
    let label = LabelRef(str: "Hello, SwiftGtk")
    window.add(widget: label)
    window.showAll()
}

guard let status = status else {
    fatalError("Could not create Application")
}
guard status == 0 else {
    fatalError("Application exited with status \(status)")
}