[JMGomes]

Problem

I'm blocked from using this library in flutter - On Ubuntu 22.04, the library does not build. shortcut_portal_linux.cpp fails to compile:

src/platform/linux/shortcut_portal_linux.cpp:429:19: error: 'G_CONNECT_DEFAULT' was not declared in this scope; did you mean 'G_CONNECT_AFTER'?

The same error stops every Flutter app that depends on cnativeapi 0.5.6 or 0.5.7 (for example through tray_manager 0.8.x or window_manager 0.6.x), because the native-assets build hook compiles all sources:

ERROR: Building assets for package:cnativeapi failed.
.../cnativeapi-0.5.7/cxx_impl/src/platform/linux/shortcut_portal_linux.cpp:429:19: error: use of undeclared identifier 'G_CONNECT_DEFAULT'; did you mean 'G_CONNECT_AFTER'?

Ubuntu 22.04 is still a common build host, because a Linux app must be built on the oldest distribution that it supports.

Root cause

GLib added G_CONNECT_DEFAULT in 2.74 (GConnectFlags: "Value: 0. Available since: 2.74"). Ubuntu 22.04 ships GLib 2.72.4. The README asks only for GTK 3, X11 and Xi, and application_linux.cpp already guards G_APPLICATION_DEFAULT_FLAGS with GLIB_CHECK_VERSION(2, 74, 0) for older distributions. The Wayland shortcut portal code from 0.5.6 added a new use of a GLib 2.74 name without such a guard. CI uses ubuntu-latest (24.04, GLib 2.80), so it does not see the error.

Fix

Pass static_cast<GConnectFlags>(0). G_CONNECT_DEFAULT has the value 0, so the behavior does not change on any GLib version.

Verification

I built the repository in an ubuntu:22.04 container (Ubuntu 22.04.5, GLib 2.72.4, GCC 11.4, CMake 3.22) with the same steps as the Linux CI job:

• main (472b2ad): the build fails with the error above.
• This change: the library and all examples build.

I also compiled the cxx_impl sources of the published cnativeapi 0.5.7 package with clang 14 on the same image. With this change, all 102 Linux sources compile, and the shared library links.

A Linux CI job on ubuntu-22.04 would catch this kind of error. I can add one in a separate PR if you want.

🤖 Generated with Claude Code

[JMGomes]

@lijy91 kindly asking for a review here 🙏

[lijy91]

The zero-valued GConnectFlags cast preserves the existing signal behavior and avoids the GLib 2.74-only enum name. No actionable findings; all CI build jobs pass.

[lijy91]

Thanks @JMGomes for the fix and the detailed verification on Ubuntu 22.04!

This is now merged and included in v0.5.8. cnativeapi, nativeapi, and nativeapi_flutter 0.5.8 are all available on pub.dev with this fix.

[JMGomes]

ctionable findings; all CI build jobs pass.

Thanks! will use it ASAP