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dotnet6.0-macos preview: Linking fails on native reference dylib
I have a Xamarin.mac app that uses https://github.com/Pkcs11Interop to interact with smartcards. Due to an implementation detail (https://github.com/Pkcs11Interop/Pkcs11Interop/issues/109) the library requires a dylib with required symbols to be present at build time. For this a simple library with empty implementations of the pkcs interface can be used.
Steps to Reproduce
- Create a new dotnet6.0-macos project
- Add the latest Pkcs11Interop nuget package
- Add a native reference to
empty-pkcs11-x64.dylib - Try to build the project with
dotnet build
Expected Behavior
With current Xamarin.Mac, the linking succeeds and the app can be built.
Actual Behavior
The build fails at the linking stage:
Optimizing assemblies for size, which may change the behavior of the app. Be sure to test after publishing. See: https://aka.ms/dotnet-illink
Tool xcrun execution finished (exit code = 1).
ld: library not found for -lempty-pkcs11-x64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Environment
Version information
=== Visual Studio Community 2019 for Mac ===
Version 8.10.23 (build 7)
Installation UUID: 66016c88-d73f-43ba-9679-9669762ac900
GTK+ 2.24.23 (Raleigh theme)
Xamarin.Mac 6.18.0.23 (d16-6 / 088c73638)
Package version: 612000174
=== Mono Framework MDK ===
Runtime:
Mono 6.12.0.174 (2020-02/adf1bc4335d) (64-bit)
Package version: 612000174
=== Roslyn (Language Service) ===
3.10.0-4.21269.26+029847714208ebe49668667c60ea5b0a294e0fcb
=== NuGet ===
Version: 5.9.0.7134
=== .NET SDK (x64) ===
SDK: /usr/local/share/dotnet/x64/sdk/6.0.103/Sdks
SDK Versions:
6.0.201
6.0.103
5.0.408
5.0.407
5.0.406
3.1.419
3.1.418
3.1.417
MSBuild SDKs: /Applications/Visual Studio.app/Contents/Resources/lib/monodevelop/bin/MSBuild/Current/bin/Sdks
=== .NET Core Runtime ===
Runtime: /usr/local/share/dotnet/x64/dotnet
Runtime Versions:
6.0.3
5.0.17
5.0.16
5.0.15
3.1.25
3.1.24
3.1.23
=== .NET Core 3.1 SDK ===
SDK: 3.1.419
=== .NET 5.0 SDK ===
SDK: 5.0.408
=== Xamarin.Profiler ===
Version: 1.6.15.68
Location: /Applications/Xamarin Profiler.app/Contents/MacOS/Xamarin Profiler
=== Updater ===
Version: 11
=== Apple Developer Tools ===
Xcode 13.3.1 (20103)
Build 13E500a
=== Xamarin.Mac ===
Version: 8.8.0.3 (Visual Studio Community)
Hash: eb7f8ed35
Branch: xcode13.3
Build date: 2022-03-30 03:16:09-0400
=== Xamarin.iOS ===
Version: 15.8.0.3 (Visual Studio Community)
Hash: eb7f8ed35
Branch: xcode13.3
Build date: 2022-03-30 03:16:09-0400
=== Xamarin Designer ===
Version: 16.11.0.60
Hash: 56f9b80b0
Branch: remotes/origin/d16-11
Build date: 2021-12-15 01:44:16 UTC
=== Xamarin.Android ===
Version: 12.2.4.3 (Visual Studio Community)
Commit: xamarin-android/d17-1/fc1125e
Android SDK: /Users/manuel.moraga/Library/Developer/Xamarin/android-sdk-macosx
Supported Android versions:
None installed
SDK Tools Version: 26.1.1
SDK Platform Tools Version: 30.0.4
SDK Build Tools Version: 30.0.2
Build Information:
Mono: adf1bc4
Java.Interop: xamarin/java.interop/d17-1@7ac33610
ProGuard: Guardsquare/proguard/v7.0.1@912d149
SQLite: xamarin/sqlite/3.37.1@0893b3b
Xamarin.Android Tools: xamarin/xamarin-android-tools/d17-1@db125a7
=== Eclipse Temurin JDK ===
Java SDK: Not Found
=== Android SDK Manager ===
Version: 16.10.0.13
Hash: 1b81df5
Branch: remotes/origin/d16-10
Build date: 2021-11-12 00:17:32 UTC
=== Android Device Manager ===
Version: 16.10.0.15
Hash: 89dcc0b
Branch: remotes/origin/d16-10
Build date: 2021-11-12 00:17:52 UTC
=== Build Information ===
Release ID: 810230007
Git revision: 7f00a2236acfde86feffbab606eefae32a9adbb3
Build date: 2022-05-05 09:46:09-04
Build branch: release-8.10
=== Operating System ===
Mac OS X 12.3.1
Darwin 21.4.0 Darwin Kernel Version 21.4.0
Fri Mar 18 00:46:32 PDT 2022
root:xnu-8020.101.4~15/RELEASE_ARM64_T6000 x86_64
Build Logs
Example Project (If Possible)
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net6.0-macos</TargetFramework>
<RootNamespace>dotnet_macos_cert</RootNamespace>
<ApplicationId>com.example.service</ApplicationId>
<RuntimeIdentifier>osx-x64</RuntimeIdentifier>
<SelfContained>true</SelfContained>
<Nullable>enable</Nullable>
<SupportedOSPlatformVersion>10.15</SupportedOSPlatformVersion>
<MtouchExtraArgs>-v -v -v -v</MtouchExtraArgs>
</PropertyGroup>
<ItemGroup>
<NativeReference Include="empty-pkcs11-x64.dylib">
<Kind>Dynamic</Kind>
<SmartLink>False</SmartLink>
</NativeReference>
</ItemGroup>
<ItemGroup>
<PackageReference Include="Pkcs11Interop" Version="5.1.2" />
</ItemGroup>
</Project>
Can you try adding a lib prefix to your dylib to see if that works? So that it's named libempty-pkcs11-x64.dylib.
Hi @mmoraga. We have added the "need-info" label to this issue, which indicates that we have an open question for you before we can take further action. This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.
@rolfbjarne thanks for the quick reply. That seems to build! Will run a few tests to see if it also works correctly
Now I've properly tested it. So prepending lib to the library name fixed it. Is this by design or will you be fixing it in the final release?
This was not intentional, but we won't fix it for the final release (too late for that). We might fix it for a later release though.
@rolfbjarne I have the same problem with .NET MAUI, in xamarin forms macos this solution works fine.
@angelru you're saying that adding a "lib" prefix to your native library doesn't work? If so, it's a different bug, which means a new issue should be filed.
In a Xamarin project this works fine.
@angelru yes, that's a different issue. I'm not sure what's going on, but I believe that should be filed in https://github.com/dotnet/maui/issues.
@angelru yes, that's a different issue. I'm not sure what's going on, but I believe that should be filed in https://github.com/dotnet/maui/issues.
Thanks
@rolfbjarne
ld: building for Mac Catalyst, but linking in dylib built for macOS, file 'obj/Debug/net6.0-maccatalyst/maccatalyst-x64/nativelibraries/libempty-pkcs11-x64.dylib' for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
I really don't know how to fix this, is it .NET MAUI or Pkcs11Interop?
@angelru you're including Libs/libempty-pkcs11-x64.dylib in your main project file:
<NativeReference Include="Libs/libempty-pkcs11-x64.dylib">
<Kind>Dynamic</Kind>
<SmartLink>False</SmartLink>
</NativeReference>
that has to be a library built for Mac Catalyst. You'll have to contact the people you got the library from, and ask them for a library built for Mac Catalyst (a library built for macOS does not work).
@angelru you're including
Libs/libempty-pkcs11-x64.dylibin your main project file:<NativeReference Include="Libs/libempty-pkcs11-x64.dylib"> <Kind>Dynamic</Kind> <SmartLink>False</SmartLink> </NativeReference>that has to be a library built for Mac Catalyst. You'll have to contact the people you got the library from, and ask them for a library built for Mac Catalyst (a library built for macOS does not work).
https://github.com/Pkcs11Interop/empty-pkcs11/issues/2
@angelru try building the library with catalyst target as seen here: https://developer.apple.com/forums/thread/122571
clang -target x86_64-apple-ios-macabi \
-arch arm64 -arch x86_64 \
-isysroot `xcrun --sdk macosx --show-sdk-path` \
-miphoneos-version-min=13.0 \
-fembed-bitcode \
main.c
@angelru try building the library with catalyst target as seen here: https://developer.apple.com/forums/thread/122571
clang -target x86_64-apple-ios-macabi \ -arch arm64 -arch x86_64 \ -isysroot `xcrun --sdk macosx --show-sdk-path` \ -miphoneos-version-min=13.0 \ -fembed-bitcode \ main.c
I don't know very well where I have to put those commands, in the build.sh?