Binaries compiled by cmake don't have LC_VERSION_MIN_MACOSX based on the selected Xcode

[KazW]

There are a few warnings that happen when compiling with a lower Xcode version on a newer OS. This issue is pretty much just notes for myself, I think I know how to fix this and will try over the weekend.

Setting the correct flags looks to be whats needed. One of the SO answers below should work, if added somewhere around here.

• https://stackoverflow.com/a/35314076
• https://stackoverflow.com/a/10559847

AirSim compiled on 10.13.3 with:

sudo xcode-select -s /Applications/Xcode8.3.2.app
./setup.sh
./build.sh

Can be confirmed by looking around LC_VERSION_MIN_MACOSX lines when inspecting a binary with otool -l Unreal/Plugins/AirSim/Source/AirLib/deps/MavLinkCom/lib/libMavLinkCom.a.

Log output from build:

lBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/MavLinkCom/lib/libMavLinkCom.a(MavLinkNode.cpp.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/MavLinkCom/lib/libMavLinkCom.a(MavLinkVehicle.cpp.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/MavLinkCom/lib/libMavLinkCom.a(MavLinkConnection.cpp.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/MavLinkCom/lib/libMavLinkCom.a(MavLinkFindSerialPorts.cpp.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/MavLinkCom/lib/libMavLinkCom.a(MavLinkMessageBase.cpp.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/MavLinkCom/lib/libMavLinkCom.a(MavLinkVideoStream.cpp.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/MavLinkCom/lib/libMavLinkCom.a(Semaphore.cpp.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/rpclib/lib/librpc.a(client.cc.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/rpclib/lib/librpc.a(dispatcher.cc.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/rpclib/lib/librpc.a(server.cc.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/MavLinkCom/lib/libMavLinkCom.a(MavLinkMessages.cpp.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/rpclib/lib/librpc.a(format.cc.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/MavLinkCom/lib/libMavLinkCom.a(MavLinkNodeImpl.cpp.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/MavLinkCom/lib/libMavLinkCom.a(MavLinkVehicleImpl.cpp.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/MavLinkCom/lib/libMavLinkCom.a(MavLinkConnectionImpl.cpp.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/MavLinkCom/lib/libMavLinkCom.a(MavLinkVideoStreamImpl.cpp.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/rpclib/lib/librpc.a(client_error.cc.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/rpclib/lib/librpc.a(server_session.cc.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/rpclib/lib/librpc.a(response.cc.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/rpclib/lib/librpc.a(rpc_error.cc.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/MavLinkCom/lib/libMavLinkCom.a(SerialPort.cpp.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/MavLinkCom/lib/libMavLinkCom.a(TcpClientPort.cpp.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/MavLinkCom/lib/libMavLinkCom.a(UdpClientPort.cpp.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/rpclib/lib/librpc.a(this_server.cc.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/rpclib/lib/librpc.a(this_handler.cc.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/rpclib/lib/librpc.a(this_session.cc.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/MavLinkCom/lib/libMavLinkCom.a(wifi.cpp.o)) was built for newer OSX version (10.13) than being linked (10.9)
UATHelper: Packaging (Mac): UnrealBuildTool: ld: warning: object file (/Volumes/MainDisk1/Unreal/Projects/AirSimMountains/Plugins/AirSim/Source/AirLib/deps/MavLinkCom/lib/libMavLinkCom.a(SocketInit.cpp.o)) was built for newer OSX version (10.13) than being linked (10.9)

[sytelus]

This is great! Please send pull request if this works. Thanks for looking into this!