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plugin: workaround cxx-qt 0.8.1 dyn plugin not calling qml_register_types

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Damocles 2026-05-03 23:27:20 +02:00
parent 8b73f3d692
commit fa861a4399
1 changed files with 14 additions and 0 deletions
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14
plugin/src/lib.rs
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@ -2,7 +2,21 @@ pub mod cpu_service;
pub mod stats; pub mod stats;
pub mod system_stats; pub mod system_stats;
// cxx-qt 0.8.1's PluginType::Dynamic emits a QQmlEngineExtensionPlugin whose
// constructor only anchors qml_register_types_NovaStats with `volatile auto X = &X`
// (linker-keep, not a call), and the qmltyperegistrar static init doesn't call it
// either. Net effect: types never register, NS.* stays undefined in QML. Workaround:
// call it ourselves at .so load time. The function is mangled (returns void, no
// extern "C"), so go through #[link_name] using the itanium-mangled symbol seen in
// `nm libNovaStats.so | grep qml_register_types`.
unsafe extern "C" {
#[link_name = "_Z28qml_register_types_NovaStatsv"]
fn qml_register_types_nova_stats();
}
#[ctor::ctor(unsafe)] #[ctor::ctor(unsafe)]
fn on_dylib_load() { fn on_dylib_load() {
eprintln!("[nova-plugin] dylib loaded (libNovaStats.so)"); eprintln!("[nova-plugin] dylib loaded (libNovaStats.so)");
unsafe { qml_register_types_nova_stats() };
eprintln!("[nova-plugin] qml_register_types_NovaStats called");
} }