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Extend compiler_error for missing feature to warn of duplicate implementations

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This commit is contained in:
Robert Bragg
2022-09-12 17:24:37 +01:00
parent 781e1fd658
commit 7d73e57364
1 changed files with 17 additions and 1 deletions
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android-activity/src/lib.rs
+17 -1
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@@ -17,7 +17,23 @@ compile_error!(
not(any(feature = "game-activity", feature = "native-activity")),
not(doc)
))]
compile_error!("Either \"game-activity\" or \"native-activity\" must be enabled as features");
compile_error!(
r#"Either \"game-activity\" or \"native-activity\" must be enabled as features
If you have set one of these features then this error indicates that Cargo is trying to
link together multiple implementations of android-activity (with incompatible versions)
which is not supported.
Since android-activity is responsible for the `android_main` entrypoint of your application
then there can only be a single implementation of android-activity linked with your application.
You can use `cargo tree` (e.g. via `cargo ndk -t arm64-v8a tree`) to identify why multiple
versions have been resolved.
You may need to add a `[patch]` into your Cargo.toml to ensure a specific version of
android-activity is used across all of your application's crates.
"#
);
#[cfg(any(feature = "native-activity", doc))]
mod native_activity;