clang++ exited with code 1: building for 'iOS', but linking in object file libswiftCompatibility50.a[arm64][7](Overrides.cpp.o) built for 'iOS-simulator'

[FlavioGoncalves-Cayas]

Description

Hello,

I am having issues building my net9.0 MAUI app for iOS on Azure DevOps, while it works perfectly fine locally. I already compared the workloads, sdks and XCode versions.

Here is the error I am receiving:

/Users/runner/hostedtoolcache/dotnet/packs/Microsoft.iOS.Sdk.net9.0_18.2/18.2.9180/targets/Xamarin.Shared.Sdk.targets(1665,3): error : clang++ exited with code 1: [redacted.csproj]
/Users/runner/hostedtoolcache/dotnet/packs/Microsoft.iOS.Sdk.net9.0_18.2/18.2.9180/targets/Xamarin.Shared.Sdk.targets(1665,3): error : ld: building for 'iOS', but linking in object file (/Applications/Xcode_16.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/iphonesimulator/libswiftCompatibility50.a[arm64][7](Overrides.cpp.o)) built for 'iOS-simulator' [redacted.csproj]
/Users/runner/hostedtoolcache/dotnet/packs/Microsoft.iOS.Sdk.net9.0_18.2/18.2.9180/targets/Xamarin.Shared.Sdk.targets(1665,3): error : clang++: error: linker command failed with exit code 1 (use -v to see invocation) [redacted.csproj]

This is the pipeline configuration:

vmImage: macOS-15
.NET SDK: 9.0.102
XCode: 16.2
workloads:
  ios                        18.2.9180/9.0.100      SDK 9.0.100        
  maui                       9.0.14/9.0.100         SDK 9.0.100        
  maui-ios                   9.0.14/9.0.100         SDK 9.0.100 

I am using dotnet publish:

dotnet publish redacted.csproj -f net9.0-ios -c Release -p:ArchiveOnBuild=true -p:RuntimeIdentifier=ios-arm64 -p:CodesignKey="$(APPLE_CERTIFICATE_SIGNING_IDENTITY)"

Any ideas on how to fix it, or what's the underlying issue?

I am also wondering why it says Xcode_16.app in the error, when I specifically selected XCode 16.2 with sudo xcode-select -s /Applications/Xcode_16.2.app

@rolfbjarne maybe it's more of a macios issue?

Steps to Reproduce

No response

Link to public reproduction project repository

No response

Version with bug

9.0.30 SR3

Is this a regression from previous behavior?

No, this is something new

Last version that worked well

Unknown/Other

Affected platforms

iOS

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output

[rolfbjarne]

I am also wondering why it says Xcode_16.app in the error, when I specifically selected XCode 16.2 with sudo xcode-select -s /Applications/Xcode_16.2.app

That's probably the issue.

Check if this file exists, and if it does, just delete it:

~/Library/Preferences/Xamarin/Settings.plist

For more information see: #11172 (comment)

[FlavioGoncalves-Cayas]

@rolfbjarne thanks for the reply.

cat ~/Library/Preferences/Xamarin/Settings.plist returns no such file or directory

So it looks like that is not the issue.

Also xcode-select -p returns /Applications/Xcode_16.2.app/Contents/Developer as expected, after sudo xcode-select -s /Applications/Xcode_16.2.app

[rolfbjarne]

Can you get an MSBuild binlog that shows the build failure?

[FlavioGoncalves-Cayas]

Heres the binlog you requested:

msbuild.binlog.zip

Thanks for the help.

[rolfbjarne]

Is either /Applications/Xcode_16.2.app or /Applications/Xcode_16.app a symlink to somewhere else?

What's the output of this command?

ls -lad /Applications/Xcode*.app

[FlavioGoncalves-Cayas]

The output is

lrwxr-xr-x  1 runner  admin  26 Jan 20 05:07 /Applications/Xcode.app -> /Applications/Xcode_16.app
lrwxr-xr-x  1 runner  admin  28 Jan 20 05:06 /Applications/Xcode_15.4.0.app -> /Applications/Xcode_15.4.app
drwxr-xr-x  3 runner  staff  96 Jan 20 04:10 /Applications/Xcode_15.4.app
lrwxr-xr-x  1 runner  admin  26 Jan 20 05:06 /Applications/Xcode_16.0.0.app -> /Applications/Xcode_16.app
lrwxr-xr-x  1 runner  admin  26 Jan 20 05:06 /Applications/Xcode_16.0.app -> /Applications/Xcode_16.app
lrwxr-xr-x  1 runner  admin  28 Jan 20 05:06 /Applications/Xcode_16.1.0.app -> /Applications/Xcode_16.1.app
drwxr-xr-x  3 runner  staff  96 Jan 20 04:10 /Applications/Xcode_16.1.app
lrwxr-xr-x  1 runner  admin  28 Jan 20 05:06 /Applications/Xcode_16.2.0.app -> /Applications/Xcode_16.2.app
drwxr-xr-x  3 runner  staff  96 Jan 20 04:10 /Applications/Xcode_16.2.app
drwxr-xr-x  3 runner  staff  96 Jan 20 04:10 /Applications/Xcode_16.app

[rolfbjarne]

Can you try executing this, just before executing dotnet publish, and see if that fixes anything:

xcrun -k

This removes a cache used when looking up Xcode's development tools and properties on the command line (you can verify this by looking at xcrun's man page ("man xcrun")).

[FlavioGoncalves-Cayas]

Unfortunately that did not help.

[rolfbjarne]

This is getting stranger and stranger :(

Next idea to get more verbose output from the native linker, please add this to the csproj and get an updated binlog:

<ItemGroup>
    <_CustomLinkFlags Include="-v" />
</ItemGroup>

[FlavioGoncalves-Cayas]

Here's the new binlog
msbuild (2).binlog.zip

[rolfbjarne]

I think I see something wrong with the Org.Jitsi.Meet.Sdk.iOS package, it adds linker flags to the build that hardcodes paths to /Application/Xcode.app, which is a symlink that ends up resolving to /Application/Xcode_16.app.

I couldn't find this package on NuGet.org, so I assume it's a private package? Do you control it / do you have the source code for it?

[FlavioGoncalves-Cayas]

Oh, I see. Yes that is a private package I control.
It has LinkerFlags like these

<NativeReference Include="..\iOS\JitsiMeetSdkProxy\Pods\JitsiMeetSDK\Frameworks\JitsiMeetSDK.xcframework">
        <Kind>Framework</Kind>
          <SmartLink>False</SmartLink>
        <Frameworks>Foundation UIKit</Frameworks>
          <LinkerFlags>-L /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/iphonesimulator/ -L /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/iphoneos -Wl,-rpath -Wl,@executable_path/Frameworks -ObjC </LinkerFlags>
      </NativeReference>

I don't quite remember when and why I added them. Probably read it somewhere when I was trying to get the binding working.
Do you happen to know if they are necessary?

[rolfbjarne]

Can you try and see if this works?

<NativeReference Include="..\iOS\JitsiMeetSdkProxy\Pods\JitsiMeetSDK\Frameworks\JitsiMeetSDK.xcframework">
    <Kind>Framework</Kind>
    <SmartLink>False</SmartLink>
    <Frameworks>Foundation UIKit</Frameworks>
    <LinkWithSwiftSystemLibraries>true</LinkWithSwiftSystemLibraries>
</NativeReference>

If not, please attach an updated binlog.

[FlavioGoncalves-Cayas]

Did that. Now I'm facing other errors

/Users/runner/hostedtoolcache/dotnet/packs/Microsoft.iOS.Sdk.net9.0_18.2/18.2.9180/targets/Xamarin.Shared.Sdk.targets(1665,3): error : Undefined symbols for architecture arm64: [/Users/runner/work/1/s/redacted.csproj]
/Users/runner/hostedtoolcache/dotnet/packs/Microsoft.iOS.Sdk.net9.0_18.2/18.2.9180/targets/Xamarin.Shared.Sdk.targets(1665,3): error :   "_OBJC_CLASS_$_JitsiMeetConferenceOptionsBuilderProxy", referenced from: [/Users/runner/work/1/s/redacted.csproj]
/Users/runner/hostedtoolcache/dotnet/packs/Microsoft.iOS.Sdk.net9.0_18.2/18.2.9180/targets/Xamarin.Shared.Sdk.targets(1665,3): error :        in registrar.o [/Users/runner/work/1/s/redacted.csproj]
/Users/runner/hostedtoolcache/dotnet/packs/Microsoft.iOS.Sdk.net9.0_18.2/18.2.9180/targets/Xamarin.Shared.Sdk.targets(1665,3): error :   "_OBJC_CLASS_$_JitsiMeetViewProxy", referenced from: [/Users/runner/work/1/s/redacted.csproj]
/Users/runner/hostedtoolcache/dotnet/packs/Microsoft.iOS.Sdk.net9.0_18.2/18.2.9180/targets/Xamarin.Shared.Sdk.targets(1665,3): error :        in registrar.o [/Users/runner/work/1/s/redacted.csproj]
/Users/runner/hostedtoolcache/dotnet/packs/Microsoft.iOS.Sdk.net9.0_18.2/18.2.9180/targets/Xamarin.Shared.Sdk.targets(1665,3): error :   "_OBJC_CLASS_$__TtC17JitsiMeetSdkProxy25JitsiMeetViewDelegateImpl", referenced from: [/Users/runner/work/1/s/redacted.csproj]
/Users/runner/hostedtoolcache/dotnet/packs/Microsoft.iOS.Sdk.net9.0_18.2/18.2.9180/targets/Xamarin.Shared.Sdk.targets(1665,3): error :        in registrar.o [/Users/runner/work/1/s/redacted.csproj]

msbuild (4).binlog.zip