title: Unity - using Fabric causes problems with iOS
body: <p>We're using Fabric with Crashlytics in our Unity Game and after building the iOS project with Unity and starting in Xcode we get about 26 errors:</p>
  
  <pre><code>Undefined symbols for architecture armv7:
    "_OBJC_CLASS_$_FABNetworkResponseHandler", referenced from:
        objc-class-ref in Crashlytics(CLSNetworkClient.o)
    "_OBJC_CLASS_$_CLSURLSession", referenced from:
        objc-class-ref in Crashlytics(CLSNetworkClient.o)
    "_OBJC_CLASS_$_FABCertificatePinner", referenced from:
        objc-class-ref in Crashlytics(CLSNetworkClient.o)
    "_FABGenerateUUID", referenced from:
        -[CLSAnalyticsIdentifierGenerator generateSessionFragmentIdentifier] in Crashlytics(CLSAnalyticsIdentifierGenerator.o)
        -[CLSAnalyticsIdentifierGenerator generateEventIdentifier] in Crashlytics(CLSAnalyticsIdentifierGenerator.o)
    "_FABApplicationShouldReportDeviceIdentifiers", referenced from:
        +[CLSAnalyticsMetadataController identifierForAdvertising] in Crashlytics(CLSAnalyticsMetadataController.o)
    "_FABHostGetOSVersion", referenced from:
        _CLSHostGetNormalizedOSVersion in Crashlytics(CLSHost.o)
    "_FABApplicationInstallationSource", referenced from:
        +[CLSBetaController isBetaSupported] in Crashlytics(CLSBetaController.o)
        -[CLSBetaController appInstallationSource] in Crashlytics(CLSBetaController.o)
    "_CLSMachOFormatVersion", referenced from:
        _CLSBinaryImageRecordMainExecutable in Crashlytics(CLSBinaryImage.o)
    "_FABHostGetNormalizedOSVersion", referenced from:
        _CLSBetaToken in Crashlytics(CLSBetaToken.o)
    "_OBJC_CLASS_$_FABURLBuilder", referenced from:
        objc-class-ref in Crashlytics(CLSBetaController.o)
        objc-class-ref in Crashlytics(CLSReportsController.o)
    "_FABApplicationGetShortBundleVersion", referenced from:
        ___CLSContextInitialize_block_invoke26 in Crashlytics(CLSContext.o)
        -[CLSBetaController appDisplayVersion] in Crashlytics(CLSBetaController.o)
        +[CLSAnalyticsMetadataController bundleShortVersion] in Crashlytics(CLSAnalyticsMetadataController.o)
    "_OBJC_CLASS_$_FABNetworkClient", referenced from:
        objc-class-ref in Crashlytics(CLSBetaController.o)
        objc-class-ref in Crashlytics(CLSAnalyticsNetworkingClient.o)
    "_OBJC_CLASS_$_FABMultipartMimeStreamEncoder", referenced from:
        objc-class-ref in Crashlytics(CLSAnalyticsNetworkingClient.o)
        objc-class-ref in Crashlytics(CLSReportsController.o)
        objc-class-ref in Crashlytics(CLSPackageReportOperation.o)
    "_FABNetworkMaximumRetryCount", referenced from:
        ___51-[CLSBetaController loadUpdateWithCompletionBlock:]_block_invoke in Crashlytics(CLSBetaController.o)
        -[CLSAnalyticsNetworkingClient transmitLogFilesAtURLs:toURL:withAPIKey:completionHandler:] in Crashlytics(CLSAnalyticsNetworkingClient.o)
    "_OBJC_CLASS_$_CLSURLSessionConfiguration", referenced from:
        objc-class-ref in Crashlytics(CLSNetworkClient.o)
    "_OBJC_CLASS_$_CLSUserDefaults", referenced from:
        objc-class-ref in Crashlytics(CLSAnalyticsController.o)
    "_FABApplicationGetBundleVersion", referenced from:
        ___CLSContextInitialize_block_invoke26 in Crashlytics(CLSContext.o)
        -[CLSBetaController appBuildVersion] in Crashlytics(CLSBetaController.o)
        +[CLSAnalyticsMetadataController bundleVersion] in Crashlytics(CLSAnalyticsMetadataController.o)
    "_FABEnumerateByteRangesOfNSDataUsingBlock", referenced from:
        -[CLSPackageReportOperation compressData:toPath:] in Crashlytics(CLSPackageReportOperation.o)
    "_FABApplicationGetName", referenced from:
        -[CLSBetaUpdate promptMessage] in Crashlytics(CLSBetaUpdate.o)
    "_FABSettingsAvailableNotification", referenced from:
        -[CLSAnalyticsController initWithSessionIdentifier:sessionTimestamp:analyticsRootDirectoryWithURL:betaToken:identifierGenerator:timestampGenerator:metadataController:networkingClient:] in Crashlytics(CLSAnalyticsController.o)
        -[CLSBetaController start] in Crashlytics(CLSBetaController.o)
    "_FABApplicationGetBundleIdentifier", referenced from:
        ___30-[Answers startWithBetaToken:]_block_invoke in Crashlytics(Answers.o)
        ___CLSContextInitialize_block_invoke26 in Crashlytics(CLSContext.o)
        -[CLSBetaController appBundleIdentifier] in Crashlytics(CLSBetaController.o)
        -[CLSCrashReportingController bundleIdentifier] in Crashlytics(CLSCrashReportingController.o)
        -[CLSFileManager pathNamespace] in Crashlytics(CLSFileManager.o)
        +[CLSAnalyticsMetadataController bundleIdentifier] in Crashlytics(CLSAnalyticsMetadataController.o)
    "_FABHostOSBuildVersion", referenced from:
        ___20-[Crashlytics start]_block_invoke in Crashlytics(Crashlytics.o)
        _CLSHostRecord in Crashlytics(CLSHost.o)
        +[CLSAnalyticsMetadataController hostOSVersion] in Crashlytics(CLSAnalyticsMetadataController.o)
    "_FABHostModelInfo", referenced from:
        ___20-[Crashlytics start]_block_invoke in Crashlytics(Crashlytics.o)
        _CLSHostRecord in Crashlytics(CLSHost.o)
        +[CLSAnalyticsMetadataController hostModel] in Crashlytics(CLSAnalyticsMetadataController.o)
        +[CLSAnalyticsMetadataController hostMachine] in Crashlytics(CLSAnalyticsMetadataController.o)
    "_FABHostOSDisplayVersion", referenced from:
        ___20-[Crashlytics start]_block_invoke in Crashlytics(Crashlytics.o)
        _CLSHostRecord in Crashlytics(CLSHost.o)
        +[CLSAnalyticsMetadataController hostOSVersionName] in Crashlytics(CLSAnalyticsMetadataController.o)
    "_FABBuiltinCertificates", referenced from:
        +[CLSBetaController pinnnedCertificates] in Crashlytics(CLSBetaController.o)
        +[CLSNetworkClient pinner] in Crashlytics(CLSNetworkClient.o)
  ld: symbol(s) not found for architecture armv7
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  </code></pre>
  
  <p>Any idea how we can fix that issue? I checked the files in Unity and it seems everything is imported fine.</p>