iOS Native Linking Errors

[KMWenyon]

I have recently upgraded our Blackberry Dynamics [Xamarin Forms] LOB Mobile application from BBD SDK v7.0.0.2. to v8.0.0.42. I am unable to build the iOS application due to the following 3 errors:

• Error MT5209: no -arch specified
• Error MT5201: Native linking failed
  
  -Error clang: linker command failed with exit code 1 (use -v to see invocation)
  ClangInvocation.txt

Below please find my Development/VS configurations and versions:
=== Visual Studio Enterprise 2019 for Mac ===

Version 8.10 (build 1773)
Installation UUID: df3c6894-34f5-43c6-9e8c-5a86f96e6487
GTK+ 2.24.23 (Raleigh theme)
Xamarin.Mac 6.18.0.23 (d16-6 / 088c73638)

Package version: 612000140

=== Mono Framework MDK ===

Runtime:
Mono 6.12.0.140 (2020-02/51d876a041e) (64-bit)
Package version: 612000140

=== Xamarin Designer ===

Version: 16.10.0.117
Hash: 249267d55
Branch: remotes/origin/d16-10
Build date: 2021-05-24 21:27:04 UTC

=== Roslyn (Language Service) ===

3.10.0-3.21251.8+4c32f5e4e9c0828a94fd4d1c9c0994082c85aaf3

=== NuGet ===

Version: 5.9.0.7134

=== .NET Core SDK ===

SDK: /usr/local/share/dotnet/sdk/6.0.100-preview.4.21255.9/Sdks
SDK Versions:
5.0.203
5.0.201
3.1.409
3.1.407
3.1.401
3.1.302
3.1.301
3.1.300
3.1.202
3.1.200
3.1.102
3.1.101
3.1.100
3.0.101
3.0.100
2.1.701
2.1.700
MSBuild SDKs: /Applications/Visual Studio.app/Contents/Resources/lib/monodevelop/bin/MSBuild/Current/bin/Sdks

=== .NET Core Runtime ===

Runtime: /usr/local/share/dotnet/dotnet
Runtime Versions:
5.0.6
5.0.4
3.1.15
3.1.13
3.1.7
3.1.6
3.1.5
3.1.4
3.1.2
3.1.1
3.1.0
3.0.1
3.0.0
2.1.23
2.1.21
2.1.20
2.1.19
2.1.18
2.1.17
2.1.16
2.1.15
2.1.14
2.1.13
2.1.12
2.1.11

=== .NET Core 3.1 SDK ===

SDK: 3.1.409

=== Xamarin.Profiler ===

Version: 1.6.15.68
Location: /Applications/Xamarin Profiler.app/Contents/MacOS/Xamarin Profiler

=== Updater ===

Version: 11

=== Apple Developer Tools ===

Xcode 12.5 (18205)
Build 12E262

=== Xamarin.Mac ===

Version: 7.14.0.1 (Visual Studio Enterprise)
Hash: fe0e2c518
Branch: d16-10
Build date: 2021-05-19 08:15:55-0400

=== Xamarin.iOS ===

Version: 14.20.0.1 (Visual Studio Enterprise)
Hash: fe0e2c518
Branch: d16-10
Build date: 2021-05-19 08:15:56-0400

=== Xamarin.Android ===

Version: 11.3.0.1 (Visual Studio Enterprise)
Commit: xamarin-android/d16-10/22fc2b3
Android SDK: /Users/kenwenyon/Library/Android/sdk
Supported Android versions:
5.0 (API level 21)
5.1 (API level 22)
6.0 (API level 23)
7.0 (API level 24)
7.1 (API level 25)
8.0 (API level 26)
8.1 (API level 27)

SDK Tools Version: 26.1.1
SDK Platform Tools Version: 31.0.2
SDK Build Tools Version: 31.0.0 rc4

Build Information:
Mono: b4a3858
Java.Interop: xamarin/java.interop@f39db25
ProGuard: Guardsquare/proguard@912d149
SQLite: xamarin/sqlite@85460d3
Xamarin.Android Tools: xamarin/xamarin-android-tools@c5732a0

=== Microsoft OpenJDK for Mobile ===

Java SDK: /Library/Java/JavaVirtualMachines/microsoft-11.jdk/Contents/Home
2021-04-20
Android Designer EPL code available here:
https://github.com/xamarin/AndroidDesigner.EPL

=== Android SDK Manager ===

Version: 16.10.0.12
Hash: e240b8c
Branch: remotes/origin/d16-10
Build date: 2021-05-13 17:01:38 UTC

=== Android Device Manager ===

Version: 16.10.0.14
Hash: e340248
Branch: remotes/origin/d16-10
Build date: 2021-05-13 17:01:56 UTC

=== Build Information ===

Release ID: 810001773
Git revision: 56d63e5691f86f863cfaed823a5a8fe430e1aaa9
Build date: 2021-05-28 11:21:28-04
Build branch: release-8.10

=== Operating System ===

Mac OS X 10.16.0
Darwin 20.4.0 Darwin Kernel Version 20.4.0
Thu Apr 22 21:46:47 PDT 2021
root:xnu-7195.101.2~1/RELEASE_X86_64 x86_64

=== Enabled user installed extensions ===

XAML Styler 2.0.1
NuGet Package Management Extensions 0.26
NuGet Package Explorer 0.6

Below please find my Additional mtouch arguments:
-v -v -v -v -cxx --registrar:static --gcc_flags="-lc++ -framework QuickLook -framework LocalAuthentication -framework SystemConfiguration -framework Security -framework MobileCoreServices -framework QuartzCore -framework CoreTelephony -framework MessageUI -framework AdSupport -framework DeviceCheck -framework WebKit -framework SafariServices -framework AVFoundation -framework BlackBerryCerticom -framework BlackBerryCerticomSBGSE -B ${ProjectDir}"

Below please find my build settings: