Incompatible Objective-C category definitions. Some category metadata may be lost. '/Users/macuser/Library/Developer/Xcode/DerivedData/foo-dbithaymaeopswfucbsjvvttinea/Build/Intermediates.noindex/foo.build/Debug_PROD-iphonesimulator/foo.build/Objects-normal/x86_64/ViewController.o' and '/Users/macuser/dev/projs/foo/Pods/mailcore2-ios/lib/libMailCore-ios.a(MCOAddress.o) built with different compilers
Platform(s)
<iOS>
Actual outcome
Installed MailCore using Cocoapods in iOS project.
Summary Warning in Xcode 12.3. Swift version 4.0
Incompatible Objective-C category definitions. Some category metadata may be lost. '/Users/macuser/Library/Developer/Xcode/DerivedData/foo-dbithaymaeopswfucbsjvvttinea/Build/Intermediates.noindex/foo.build/Debug_PROD-iphonesimulator/foo.build/Objects-normal/x86_64/ViewController.o' and '/Users/macuser/dev/projs/foo/Pods/mailcore2-ios/lib/libMailCore-ios.a(MCOAddress.o) built with different compilers
Platform(s)
Actual outcome Installed MailCore using Cocoapods in iOS project.