gcc fails to arch-cross-compile on GNU/Linux in NativeAOT .NET 7 #78559

WhiteBlackGoose · 2022-11-18T14:34:42Z

Description

Getting an error

gcc : error : unrecognized command-line option '--target=aarch64-linux-gnu'

When trying to compile my app for ARM64 while being on x86 64bit laptop

Reproduction Steps

dotnet new console -n frog && cd frog
dotnet publish -p:PublishAot=true -p:SelfContained=true -r linux-arm64

Expected behavior

Compiles

Actual behavior

Doesn't compile:

$ dotnet publish -p:PublishAot=true -p:SelfContained=true -r linux-arm64
MSBuild version 17.4.0+18d5aef85 for .NET
  Determining projects to restore...
  All projects are up-to-date for restore.
  frog -> /home/goose/sandbox-1668781319/frog/bin/Debug/net7.0/linux-arm64/frog.dll
  Generating native code
gcc : error : unrecognized command-line option '--target=aarch64-linux-gnu' [/home/goose/sandbox-1668781319/frog/frog.csproj]
/home/goose/programs/dotnet-folder/sdk/7.0.100/Sdks/Microsoft.DotNet.ILCompiler/build/Microsoft.NETCore.Native.targets(346,5): error MSB3073: The command ""gcc" "obj/Debug/net7.0/linux-arm64/native/frog.o" -o "bin/Debug/net7.0/linux-arm64/native/frog" /home/goose/.nuget/packages/runtime.linux-arm64.microsoft.dotnet.ilcompiler/7.0.0/sdk/libbootstrapper.a /home/goose/.nuget/packages/runtime.linux-arm64.microsoft.dotnet.ilcompiler/7.0.0/sdk/libRuntime.WorkstationGC.a /home/goose/.nuget/packages/runtime.linux-arm64.microsoft.dotnet.ilcompiler/7.0.0/framework/libSystem.Native.a /home/goose/.nuget/packages/runtime.linux-arm64.microsoft.dotnet.ilcompiler/7.0.0/framework/libSystem.Globalization.Native.a /home/goose/.nuget/packages/runtime.linux-arm64.microsoft.dotnet.ilcompiler/7.0.0/framework/libSystem.IO.Compression.Native.a /home/goose/.nuget/packages/runtime.linux-arm64.microsoft.dotnet.ilcompiler/7.0.0/framework/libSystem.Net.Security.Native.a /home/goose/.nuget/packages/runtime.linux-arm64.microsoft.dotnet.ilcompiler/7.0.0/framework/libSystem.Security.Cryptography.Native.OpenSsl.a --target=aarch64-linux-gnu -g -Wl,-rpath,'$ORIGIN' -Wl,--build-id=sha1 -Wl,--as-needed -pthread -lstdc++ -ldl -lm -lz -lrt -pie -Wl,-z,relro -Wl,-z,now -Wl,--discard-all -Wl,--gc-sections" exited with code 1. [/home/goose/sandbox-1668781319/frog/frog.csproj]

Regression?

No response

Known Workarounds

No response

Configuration

7.0.100
debian 12 sid bookworm
x86 64-bit
gcc (Debian 12.2.0-9) 12.2.0
aarch64-linux-gnu-gcc (Debian 12.2.0-9) 12.2.0
No clang installed

Other information

No response

The text was updated successfully, but these errors were encountered:

ghost · 2022-11-18T14:34:51Z

Tagging subscribers to this area: @agocke, @MichalStrehovsky, @jkotas
See info in area-owners.md if you want to be subscribed.

Issue Details

Description

Getting an error

gcc : error : unrecognized command-line option '--target=aarch64-linux-gnu'

When trying to compile my app for ARM64 while being on x86 64bit laptop

Reproduction Steps

dotnet new console -n frog && cd frog
dotnet publish -p:PublishAot=true -p:SelfContained=true -r linux-arm64

Expected behavior

Compiles

Actual behavior

Doesn't compile:

$ dotnet publish -p:PublishAot=true -p:SelfContained=true -r linux-arm64
MSBuild version 17.4.0+18d5aef85 for .NET
  Determining projects to restore...
  All projects are up-to-date for restore.
  frog -> /home/goose/sandbox-1668781319/frog/bin/Debug/net7.0/linux-arm64/frog.dll
  Generating native code
gcc : error : unrecognized command-line option '--target=aarch64-linux-gnu' [/home/goose/sandbox-1668781319/frog/frog.csproj]
/home/goose/programs/dotnet-folder/sdk/7.0.100/Sdks/Microsoft.DotNet.ILCompiler/build/Microsoft.NETCore.Native.targets(346,5): error MSB3073: The command ""gcc" "obj/Debug/net7.0/linux-arm64/native/frog.o" -o "bin/Debug/net7.0/linux-arm64/native/frog" /home/goose/.nuget/packages/runtime.linux-arm64.microsoft.dotnet.ilcompiler/7.0.0/sdk/libbootstrapper.a /home/goose/.nuget/packages/runtime.linux-arm64.microsoft.dotnet.ilcompiler/7.0.0/sdk/libRuntime.WorkstationGC.a /home/goose/.nuget/packages/runtime.linux-arm64.microsoft.dotnet.ilcompiler/7.0.0/framework/libSystem.Native.a /home/goose/.nuget/packages/runtime.linux-arm64.microsoft.dotnet.ilcompiler/7.0.0/framework/libSystem.Globalization.Native.a /home/goose/.nuget/packages/runtime.linux-arm64.microsoft.dotnet.ilcompiler/7.0.0/framework/libSystem.IO.Compression.Native.a /home/goose/.nuget/packages/runtime.linux-arm64.microsoft.dotnet.ilcompiler/7.0.0/framework/libSystem.Net.Security.Native.a /home/goose/.nuget/packages/runtime.linux-arm64.microsoft.dotnet.ilcompiler/7.0.0/framework/libSystem.Security.Cryptography.Native.OpenSsl.a --target=aarch64-linux-gnu -g -Wl,-rpath,'$ORIGIN' -Wl,--build-id=sha1 -Wl,--as-needed -pthread -lstdc++ -ldl -lm -lz -lrt -pie -Wl,-z,relro -Wl,-z,now -Wl,--discard-all -Wl,--gc-sections" exited with code 1. [/home/goose/sandbox-1668781319/frog/frog.csproj]

Regression?

No response

Known Workarounds

No response

Configuration

7.0.100
debian 12 sid bookworm
x86 64-bit
gcc (Debian 12.2.0-9) 12.2.0
aarch64-linux-gnu-gcc (Debian 12.2.0-9) 12.2.0
No clang installed

Other information

No response

Author:	WhiteBlackGoose
Assignees:	-
Labels:	`untriaged`, `area-NativeAOT-coreclr`
Milestone:	-

am11 · 2022-11-18T15:36:00Z

We haven't tested cross-compilation with gcc, so this is unsupported. We can add support for it. However, there are few things to consider:

clang has multi targets support (and hence -target/--target options are supported), but gcc only has one main target for which it was built for. We don't check the compiler flavor when setting this option (which is a bug).
user will need to install target specific gcc toolchain to be able to use gcc for cross compilation.

You can install clang (or use a docker image) for the cross-compilation in the meantime.

jkotas · 2022-11-18T15:40:55Z

Cross-compilation instructions are at https://github.com/dotnet/runtime/blob/main/src/coreclr/nativeaot/docs/compiling.md#cross-architecture-compilation . Cross-compilation on Linux requires rootfs and target architecture native toolchain to be present.

am11 · 2022-11-18T15:51:46Z

Yup, those instructions apply only to clang, because this argument is not supported on gcc:

runtime/src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Unix.targets

Line 91 in 0eabf7f

    
           <LinkerArg Include="--target=$(TargetTriple)" Condition="'$(TargetOS)' != 'OSX' and '$(TargetTriple)' != ''" />

WhiteBlackGoose · 2022-11-18T15:57:37Z

I see.
While we're at it, is there anything for OS X that has to be referenced? (I see only windows and linux mentioned in the instruction)

am11 · 2022-11-18T16:06:03Z

macOS is not supported in .NET 7. It is only available in the daily builds of .NET 8. We can update the document. Basically only cross-architecture is supported on OSX (not linux to osx). For example on M1 machine (osx-arm64), we can use:

$ dotnet8 publish -p:PublishAot=true --arch x64

to cross-compile x64 binary.

WhiteBlackGoose · 2022-11-18T16:41:52Z

macOS is not supported in .NET 7

Without cross-compilation it works though 🤔

am11 · 2022-11-18T17:15:03Z

Without cross-compilation it works though 🤔

Yes, for osx-x64 but osx-arm64 is only supported in .NET 8.

WhiteBlackGoose · 2022-11-18T17:19:42Z

Got it. Any reason why btw? It requires additional work or something else?

WhiteBlackGoose · 2022-11-18T17:27:31Z

Also, is arch-cross-compilation only available in .NET 8?

am11 · 2022-11-18T17:37:43Z

osx-arm64 support was implemented in #75264 (merged three days before the 7.0 RC1 release), and number of fixes went in main branch after that. Normally new platform support PRs are not backported, when there was no time spent on testing during the development cycle.

Also, is arch-cross-compilation only available in .NET 8?

Yes, because for OSX we only support cross-architecture compilation (and not cross-OS compilation), so it was not necessary when only one architecture was supported.

WhiteBlackGoose · 2022-11-18T17:40:59Z

I mean, what about other OS? Is there arch-cross-compilation for linux on .NET 7?

am11 · 2022-11-18T18:00:08Z

Yes. On linux, cross-compilation is supported with clang only. Normal compilation is supported with both clang and gcc.

WhiteBlackGoose · 2022-11-18T18:03:00Z

Thanks, is there any specific instruction or should work out of the box? (trying to get through an issue issue right now with it)

agocke · 2022-11-18T21:38:24Z

Instructions are here https://github.com/dotnet/runtime/blob/main/src/coreclr/nativeaot/docs/compiling.md#cross-architecture-compilation. They do require a "sysroot" that contains the arm64 toolchain, esp. glibc. I did have some success getting this to work on Ubuntu by pulling in arm64 packages, but I haven't written anything up yet.

agocke · 2023-06-21T23:22:29Z

Closing as answered

ghost added the untriaged New issue has not been triaged by the area owner label Nov 18, 2022

dotnet-issue-labeler bot added the area-NativeAOT-coreclr label Nov 18, 2022

agocke added this to the 8.0.0 milestone Nov 21, 2022

ghost removed the untriaged New issue has not been triaged by the area owner label Nov 21, 2022

am11 mentioned this issue Feb 14, 2023

Switch to selfhosted NativeAOT compiler #81205

Merged

sbomer mentioned this issue Apr 17, 2023

Decide on linker to use in runtime builds #84794

Closed

agocke closed this as not planned Won't fix, can't repro, duplicate, stale Jun 21, 2023

ghost locked as resolved and limited conversation to collaborators Jul 22, 2023

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gcc fails to arch-cross-compile on GNU/Linux in NativeAOT .NET 7 #78559

gcc fails to arch-cross-compile on GNU/Linux in NativeAOT .NET 7 #78559

WhiteBlackGoose commented Nov 18, 2022

ghost commented Nov 18, 2022

Description

Reproduction Steps

Expected behavior

Actual behavior

Regression?

Known Workarounds

Configuration

Other information

am11 commented Nov 18, 2022 •

edited

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jkotas commented Nov 18, 2022

am11 commented Nov 18, 2022

WhiteBlackGoose commented Nov 18, 2022

am11 commented Nov 18, 2022

WhiteBlackGoose commented Nov 18, 2022

am11 commented Nov 18, 2022

WhiteBlackGoose commented Nov 18, 2022

WhiteBlackGoose commented Nov 18, 2022

am11 commented Nov 18, 2022

WhiteBlackGoose commented Nov 18, 2022

am11 commented Nov 18, 2022

WhiteBlackGoose commented Nov 18, 2022

agocke commented Nov 18, 2022

agocke commented Jun 21, 2023

gcc fails to arch-cross-compile on GNU/Linux in NativeAOT .NET 7 #78559

gcc fails to arch-cross-compile on GNU/Linux in NativeAOT .NET 7 #78559

Comments

WhiteBlackGoose commented Nov 18, 2022

Description

Reproduction Steps

Expected behavior

Actual behavior

Regression?

Known Workarounds

Configuration

Other information

ghost commented Nov 18, 2022

Description

Reproduction Steps

Expected behavior

Actual behavior

Regression?

Known Workarounds

Configuration

Other information

am11 commented Nov 18, 2022 • edited Loading

jkotas commented Nov 18, 2022

am11 commented Nov 18, 2022

WhiteBlackGoose commented Nov 18, 2022

am11 commented Nov 18, 2022

WhiteBlackGoose commented Nov 18, 2022

am11 commented Nov 18, 2022

WhiteBlackGoose commented Nov 18, 2022

WhiteBlackGoose commented Nov 18, 2022

am11 commented Nov 18, 2022

WhiteBlackGoose commented Nov 18, 2022

am11 commented Nov 18, 2022

WhiteBlackGoose commented Nov 18, 2022

agocke commented Nov 18, 2022

agocke commented Jun 21, 2023

am11 commented Nov 18, 2022 •

edited

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