ad03e42b28
At the moment, the annotations implementation in the `mapbox-gl-native` core is creating concrete layer instances apart from `LayerManager/LayerFactory` code path. So, annotations must be disabled if the `LayerManager` implementation does not provide line, fill or symbol layers (those, used by the annotations). Note: in future, annotations implementation will be moved from the core to the platform SDK level(see https://github.com/mapbox/mapbox-plugins-android/tree/master/plugin-annotation) and `LayerManager` won't need to disable it.
Darwin
The code in the Darwin platform targets Apple platforms but is not specific to iOS or macOS. This code is not distributed as an SDK in itself, but is required by the Mapbox iOS SDK and Mapbox macOS SDK.
These files depend on the Foundation and Core Foundation frameworks but do not depend on iOS- or macOS–specific frameworks, such as UIKit or AppKit. Any non-cross-platform code is guarded by TargetConditionals.h macros.