After updating to Xcode 12.5, we noticed issues with one of our third-party library dependencies.
It seems like symbols declared in an Objective-C class extension are not recognised. For example, the declaration of the highlighted method can be found here:
Note: I'm not a developer on the Leanplum project, I'm just a consumer of the library
This method is available in Xcode 12.4 with the same version of the dependency. Because of the naming of the extension
LPActionContext-Internal.h, I checked if an internal header was accidentally published and later corrected, but that is not the case.
I read the "Creating C Language Targets" section of the usage documentation (the latest version of the package manager clarified a few details about umbrella headers), but I couldn't find anything that would specifically mention these type of extensions.
Installing the same dependency via CocoaPods produces no issues.
Any help is appreciated.