Xamarin failing to compile to native code

Question

I am trying to use the Good Dynamics SDK in Xamarin, I don't know Objective-C well so I am a bit lost here. This is an attempt at a proof of concept, I'm not sure if this is actually doable.

I've added the GD file as GD.a from the GD.framework directory and attempted to implement an API binding and duplicate the application start logic from the sample XCode project.

I managed to get it to build even though Mono Develop is showing everything from the ApiDefinition in red.

When building this is part of the error log Full version here

/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc  -Wl,-no_pie -arch i386 -gdwarf-2 -fobjc-legacy-dispatch -fobjc-abi-version=2 -miphoneos-version-min=6.0 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk  /var/folders/1t/cbdvyj0x4n35m7674l7wvyjc0000gn/T/tmp6df5493a.tmp/main.x86.o -o /var/folders/1t/cbdvyj0x4n35m7674l7wvyjc0000gn/T/tmp6df5493a.tmp/GDTest -framework CFNetwork -framework Foundation -framework GameKit -framework MapKit -framework MediaPlayer -framework MessageUI -framework OpenGLES -framework StoreKit -framework UIKit -framework AddressBookUI -framework SystemConfiguration -framework AddressBook -framework AudioToolbox -framework AVFoundation -framework QuartzCore -framework CoreGraphics -framework CoreLocation -framework MobileCoreServices -framework Security -framework CoreData -framework ExternalAccessory -weak_framework AssetsLibrary -weak_framework Accounts -weak_framework CoreBluetooth -weak_framework CoreTelephony -weak_framework EventKit -weak_framework EventKitUI -weak_framework CoreMotion -weak_framework GLKit -weak_framework iAd -weak_framework NewsstandKit -weak_framework Social -weak_framework Twitter -weak_framework PassKit -weak_framework CoreImage -weak_framework CoreText -weak_framework ImageIO -weak_framework CoreMedia -weak_framework CoreMIDI -weak_framework CoreVideo -weak_framework AdSupport -weak_framework QuickLook -lz -u _mono_pmip -u _CreateZStream -u _CloseZStream -u _Flush -u _ReadZStream -u _WriteZStream -liconv -lmono-2.0 -lmonotouch -L/Developer/MonoTouch/SDKs/MonoTouch.iphonesimulator.sdk/usr/lib -u _catch_exception_raise  -force_load /var/folders/1t/cbdvyj0x4n35m7674l7wvyjc0000gn/T/tmp6df5493a.tmp/GD.a
    Undefined symbols for architecture i386:
      "std::basic_istream<char, std::char_traits<char> >::gcount() const", referenced from:
          GT::AES::decode(std::basic_istream<char, std::char_traits<char> >&, std::basic_ostream<char, std::char_traits<char> >&, unsigned int&, bool)in GD.a(gtaes.o)
          GT::AES::encode(std::basic_istream<char, std::char_traits<char> >&, std::basic_ostream<char, std::char_traits<char> >&, unsigned int&, bool)in GD.a(gtaes.o)
      "std::basic_string<char, std::char_traits<char>, std::allocator<char> >::find_first_of(char const*, unsigned long, unsigned long) const", referenced from:
          -[GDSetPasswordViewController checkPasswordStrength:] in GD.a(GDSetPasswordViewController.o)
          GD::EacpCReq::EacpCReq(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, GT::Dbb&)in GD.a(GDEacpCommands.o)
          GD::RawSocket::connect()    in GD.a(GDRawSocket.o)
      "std::basic_string<char, std::char_traits<char>, std::allocator<char> >::copy(char*, unsigned long, unsigned long) const", referenced from:
          GD::Socket::toString() constin GD.a(GDSocket.o)
      "std::basic_string<char, std::char_traits<char>, std::allocator<char> >::data() const", referenced from:
          -[GTContainerDH setRemotePublic521:] in GD.a(GTContainerCrypto.o)
          -[GTContainerDH initWithP521] in GD.a(GTContainerCrypto.o)
          -[NSData(GTContainerEncryption) GTEncryptedDataUsingDerivedKey:] in GD.a(GTContainerCrypto.o)
          -[NSData(GTContainerEncryption) GTDecryptedDataUsingDerivedKey:] in GD.a(GTContainerCrypto.o)
          -[GTEncryptedFile streamDidReceiveData:] in GD.a(GTEncryptedFile.o)
          +[NSData(Base64) dataFromBase64String:] in GD.a(NSData+Base64.o)
          +[GTJsonCommandProcessor parseNSData:] in GD.a(GTICCJsonCommandProcessor.o)
          ...

This goes on for a lot longer and it finishes with the error

ld: symbol(s) not found for architecture i386
collect2: ld returned 1 exit status

error MT5202: Native linking failed. Please review the build log.

Now I'm a bit stuck. Any ideas?

Thanks

Answer 1

I needed to add -cxx to the "Additional mtouch arguments" in the iPhone build options.