iOS is crashing on deploy. It was working fine a few days ago, and no changes have been made to the project.

[racoltacalin]

clang++ exited with code 1:
Undefined symbols for architecture arm64:
  "_GULOSLogBasic", referenced from:
      _MLKLog in MLKitCommon[arm64][7](MLKLogger.o)
  "_GULOSLogError", referenced from:
      -[GULCCComponentContainer populateComponentsFromRegisteredClasses:withContext:] in MLKitCommon[arm64][212](GULCCComponentContainer.o)
      -[GULCCComponentContainer instantiateInstanceForProtocol:withBlock:] in MLKitCommon[arm64][212](GULCCComponentContainer.o)
  "_OBJC_CLASS_$_GULUserDefaults", referenced from:
       in MLKitCommon[arm64][2](MLKAnalyticsLogger.o)
ld: symbol(s) not found for architecture arm64
clang++: error: linker command failed with exit code 1 (use -v to see invocation)

[racoltacalin]

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFrameworks>net8.0;net8.0-android;net8.0-ios;</TargetFrameworks>
    <TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows'))">$(TargetFrameworks);net8.0-windows10.0.19041.0</TargetFrameworks>

    <OutputType Condition="'$(TargetFramework)' != 'net8.0'">Exe</OutputType>
    <MauiVersion>8.0.40</MauiVersion>
    <UseMaui>true</UseMaui>
    <SingleProject>true</SingleProject>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>

    <!-- Versions -->
    <ApplicationDisplayVersion>1.0</ApplicationDisplayVersion>
    <ApplicationVersion>1</ApplicationVersion>

    <SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'ios'">13.0</SupportedOSPlatformVersion>
    <SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'windows'">10.0.17763.0</SupportedOSPlatformVersion>
    <TargetPlatformMinVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'windows'">10.0.17763.0</TargetPlatformMinVersion>
    <SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'tizen'">6.5</SupportedOSPlatformVersion>
  </PropertyGroup>

  <PropertyGroup Condition="( '$(TargetFramework)' == 'net8.0-ios' )">
    <RuntimeIdentifier>ios-arm64</RuntimeIdentifier>
    <PlatformTarget>arm64</PlatformTarget>
    <ProvisioningType>manual</ProvisioningType>
    <MtouchExtraArgs>-ObjC</MtouchExtraArgs>
  </PropertyGroup>

  <PropertyGroup>
    <SatelliteResourceLanguages>en-US</SatelliteResourceLanguages>
    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
  </PropertyGroup>

  <ItemGroup>
    <!-- App Icon -->
    <MauiIcon Include="Resources\AppIcon\appicon.svg" ForegroundFile="Resources\AppIcon\appiconfg.svg" Color="#512BD4" />

    <!-- Splash Screen -->
    <MauiSplashScreen Include="Resources\Splash\splash.svg" Color="#512BD4" BaseSize="128,128" />

    <!-- Images -->
    <MauiImage Include="Resources\Images\*" />
    <MauiImage Update="Resources\Images\dotnet_bot.png" Resize="True" BaseSize="300,185" />

    <!-- Custom Fonts -->
    <MauiFont Include="Resources\Fonts\*" />

    <!-- Raw Assets (also remove the "Resources\Raw" prefix) -->
    <MauiAsset Include="Resources\Raw\**" LogicalName="%(RecursiveDir)%(Filename)%(Extension)" />
  </ItemGroup>

  <ItemGroup>
    <!--<PackageReference Include="BarcodeScanner.Mobile.Maui" />-->
    <PackageReference Include="Microsoft.Maui.Controls" />
    <PackageReference Include="Microsoft.Maui.Controls.Compatibility" />
    <PackageReference Include="Microsoft.Extensions.Logging.Debug" />
    <PackageReference Include="Xamarin.AndroidX.Activity" Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'android'" />
    <PackageReference Include="Xamarin.AndroidX.Activity.Ktx" Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'android'" />
    <PackageReference Include="Plugin.Maui.Audio" />
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include="..\BarcodeScanner.Mobile.Maui\BarcodeScanner.Mobile.Maui.csproj" />
  </ItemGroup>


</Project>

[racoltacalin]

 <!-- Mobile App -->
 <PackageVersion Include="BarcodeScanner.Mobile.Maui" Version="8.0.40.1" />
 <PackageVersion Include="Microsoft.Maui.Controls" Version="8.0.40" />
 <PackageVersion Include="Microsoft.Maui.Controls.Compatibility" Version="8.0.40" />
 <PackageVersion Include="Xamarin.AndroidX.Activity" Version="1.9.0.2" Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'android'" />
 <PackageVersion Include="Xamarin.AndroidX.Activity.Ktx" Version="1.9.0.2" Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'android'" />
 <PackageVersion Include="Plugin.Maui.Audio" Version="3.0.1" />
 <PackageVersion Include="coverlet.collector" Version="6.0.0" />
 <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
 <PackageVersion Include="NUnit" Version="3.14.0" />
 <PackageVersion Include="NUnit.Analyzers" Version="3.9.0" />
 <PackageVersion Include="NUnit3TestAdapter" Version="4.5.0" />
 <PackageVersion Include="Xamarin.AndroidX.Collection" Version="1.4.0.4"/>
 <PackageVersion Include="Xamarin.AndroidX.Collection.Jvm" Version="1.4.0.3"/>
 <PackageVersion Include="Xamarin.AndroidX.Collection.Ktx" Version="1.4.0.3"/>
 <PackageVersion Include="Xamarin.AndroidX.Camera.Camera2" Version="1.3.3.2"/>
 <PackageVersion Include="Xamarin.AndroidX.Camera.Lifecycle" Version="1.3.3.2"/>
 <PackageVersion Include="Xamarin.AndroidX.Camera.View" Version="1.3.3.2"/>
 <PackageVersion Include="Xamarin.Google.MLKit.Common" Version="118.10.0.2"/>
 <PackageVersion Include="Xamarin.Google.MLKit.Vision.Common" Version="117.3.0.8"/>
 <PackageVersion Include="Xamarin.Google.MLKit.BarcodeScanning" Version="117.2.0.4"/>
 <PackageVersion Include="Xamarin.GooglePlayServices.MLKit.Text.Recognition" Version="119.0.0.6"/>			
 <PackageVersion Include="AdamE.MLKit.iOS.BarcodeScanning" Version="6.0.0" />
 <PackageVersion Include="Xamarin.Build.Download" Version="0.11.4" />

[racoltacalin]

I tried this but I'm still getting the same error. I tried using Mac machine (Air-M2 - Squoia 15.3.1) and also from windows.

[racoltacalin]

I also tried this:

<Target Name="LinkWithSwift" DependsOnTargets="_ParseBundlerArguments;_DetectSdkLocations" BeforeTargets="_LinkNativeExecutable">
		<PropertyGroup>
			<_SwiftPlatform Condition="$(RuntimeIdentifier.StartsWith('iossimulator-'))">iphonesimulator</_SwiftPlatform>
			<_SwiftPlatform Condition="$(RuntimeIdentifier.StartsWith('ios-'))">iphoneos</_SwiftPlatform>
		</PropertyGroup>
		<ItemGroup>
			<_CustomLinkFlags Include="-L" />
			<_CustomLinkFlags Include="/usr/lib/swift" />
			<_CustomLinkFlags Include="-L" />
			<_CustomLinkFlags Include="$(_SdkDevPath)/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/$(_SwiftPlatform)" />
			<_CustomLinkFlags Include="-Wl,-rpath" />
			<_CustomLinkFlags Include="-Wl,/usr/lib/swift" />
		</ItemGroup>
	</Target>

One week ago, I'm not sure exactly what I fixed—I had a similar issue and tried all the solutions from various repositories. I'm using this library: BarcodeScanner.Mobile. Based on comments in the issues, I navigated through different repositories and discussions, and I was able to build and deploy the iOS version. But now, a couple of days later, without modifying the csproj or code, I'm encountering this strange issue.

[racoltacalin]

I was also using the library locally and had these packages referenced directly, even though I believe they are only transitive packages:

<ItemGroup>
		<PackageReference Include="AdamE.Firebase.iOS.Core" Version="11.6.0" />
		<!--<PackageReference Include="BarcodeScanner.Mobile.Maui" Version="8.0.40.1" />-->
		<PackageReference Include="Microsoft.Maui.Controls" Version="8.0.40" />
		<PackageReference Include="Microsoft.Maui.Controls.Compatibility" Version="8.0.40" />
		<PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="8.0.1" />
		<PackageReference Include="Plugin.Maui.Audio" Version="3.0.1" />
	</ItemGroup>

	<ItemGroup>
	  <ProjectReference Include="..\BarcodeScanner.Mobile.Maui\BarcodeScanner.Mobile.Maui.csproj" />
	</ItemGroup>

But afterwards, I removed the library from the solution and used the NuGet packages, and it worked (I think the cache was in place), but now something seems to have been compromised.

[AdamEssenmacher]

What is in your MLKCommon-12.0.0 directory in your XBD cache?

[racoltacalin]

[AdamEssenmacher]

Are you actually using AdamE.Firebase.iOS.Core? If not, try removing it and see what happens.

And then try adding AdamE.Google.iOS.GoogleUtilities.

[racoltacalin]

I think I added AdamE.Firebase.iOS.Core to fix some of the issues mentioned in the BarcodeScanner.Mobile.Maui library. :)

[racoltacalin]

Hmm, but I don't have a reference to AdamE.Firebase.iOS.Core in my project.

[racoltacalin]

transitive-packages.txt

   > AdamE.Google.iOS.GoogleDataTransport                       10.1.0   
   > AdamE.Google.iOS.GTMSessionFetcher                         3.5.0    
   > AdamE.Google.iOS.Nanopb                                    3.30910.0
   > AdamE.Google.iOS.PromisesObjC                              2.4.0    
   > AdamE.MLKit.iOS.BarcodeScanning                            6.0.0    
   > AdamE.MLKit.iOS.Core                                       12.0.0   

[AdamEssenmacher]

Hmm, but I don't have a reference to AdamE.Firebase.iOS.Core in my project.

I see it in:

	<PackageReference Include="AdamE.Firebase.iOS.Core" Version="11.6.0" />
	<!--<PackageReference Include="BarcodeScanner.Mobile.Maui" Version="8.0.40.1" />-->
	<PackageReference Include="Microsoft.Maui.Controls" Version="8.0.40" />
	<PackageReference Include="Microsoft.Maui.Controls.Compatibility" Version="8.0.40" />
	<PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="8.0.1" />
	<PackageReference Include="Plugin.Maui.Audio" Version="3.0.1" />
</ItemGroup>

<ItemGroup>
  <ProjectReference Include="..\BarcodeScanner.Mobile.Maui\BarcodeScanner.Mobile.Maui.csproj" />
</ItemGroup>

[racoltacalin]

Yes, but as I mentioned, that was before when I referenced the BarcodeScanner.Mobile.Maui.csproj locally rather than as a package.

[racoltacalin]

Now, my csproj looks like this:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFrameworks>net8.0;net8.0-android;net8.0-ios;</TargetFrameworks>
    <TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows'))">$(TargetFrameworks);net8.0-windows10.0.19041.0</TargetFrameworks>

    <OutputType Condition="'$(TargetFramework)' != 'net8.0'">Exe</OutputType>
    <RootNamespace>X</RootNamespace>
    <MauiVersion>8.0.40</MauiVersion>
    <UseMaui>true</UseMaui>
    <SingleProject>true</SingleProject>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>

    <!-- Display name -->
    <ApplicationTitle>X</ApplicationTitle>

    <!-- App Identifier -->
    <ApplicationId>Y</ApplicationId>

    <!-- Versions -->
    <ApplicationDisplayVersion>1.0</ApplicationDisplayVersion>
    <ApplicationVersion>1</ApplicationVersion>

    <SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'ios'">13.0</SupportedOSPlatformVersion>
    <SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'windows'">10.0.17763.0</SupportedOSPlatformVersion>
    <TargetPlatformMinVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'windows'">10.0.17763.0</TargetPlatformMinVersion>
    <SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'tizen'">6.5</SupportedOSPlatformVersion>
  </PropertyGroup>

  <PropertyGroup Condition="( '$(TargetFramework)' == 'net8.0-ios' )">
    <RuntimeIdentifier>ios-arm64</RuntimeIdentifier>
    <PlatformTarget>arm64</PlatformTarget>
    <ProvisioningType>manual</ProvisioningType>
  </PropertyGroup>

  <PropertyGroup>
    <SatelliteResourceLanguages>en-US</SatelliteResourceLanguages>
    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
  </PropertyGroup>

  <ItemGroup>
    <!-- App Icon -->
    <MauiIcon Include="Resources\AppIcon\appicon.svg" ForegroundFile="Resources\AppIcon\appiconfg.svg" Color="#512BD4" />

    <!-- Splash Screen -->
    <MauiSplashScreen Include="Resources\Splash\splash.svg" Color="#512BD4" BaseSize="128,128" />

    <!-- Images -->
    <MauiImage Include="Resources\Images\*" />
    <MauiImage Update="Resources\Images\dotnet_bot.png" Resize="True" BaseSize="300,185" />

    <!-- Custom Fonts -->
    <MauiFont Include="Resources\Fonts\*" />

    <!-- Raw Assets (also remove the "Resources\Raw" prefix) -->
    <MauiAsset Include="Resources\Raw\**" LogicalName="%(RecursiveDir)%(Filename)%(Extension)" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="BarcodeScanner.Mobile.Maui"/>
    <PackageReference Include="Microsoft.Maui.Controls"/>
    <PackageReference Include="Microsoft.Maui.Controls.Compatibility"/>
    <PackageReference Include="Microsoft.Extensions.Logging.Debug"/>
    <PackageReference Include="Xamarin.AndroidX.Activity" Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'android'" />
    <PackageReference Include="Xamarin.AndroidX.Activity.Ktx" Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'android'" />
    <PackageReference Include="Plugin.Maui.Audio"/>
  </ItemGroup>
</Project>

[AdamEssenmacher]

OK try adding that reference to AdamE.Google.iOS.GoogleUtilities