Add CI and release build for linux-armel

[ThadHouse]

There are still some platforms that run soft-float linux. One of the big ones are National Instruments Xilinx Zynq based platforms. This platform is used by the High School Robotics Competition I help maintain the software stack for. Currently it runs C++ and Java, but for years there has been interest in running C# as well. I've been working on this off and on for a while now at https://github.com/robotdotnet. One of the biggest issues is I currently use Mono, because the effort to maintain a working build of .NET core for armel is pretty high. It likes to break a lot because many devs like to hardcode arm checks to just the linux-arm RID, which breaks when attempting to build armel. I have done it in the past however, and it does build and run just fine if I fix the issue. So if we could get CI and hopefully a release build of linux-armel, that would be super helpful, and would make the possibility of that project much more feasible to support long term.

[dotnet-issue-labeler]

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

Tagging subscribers to this area: @dotnet/runtime-infrastructure
See info in area-owners.md if you want to be subscribed.

Issue Details

---

There are still some platforms that run soft-float linux. One of the big ones are National Instruments Xilinx Zynq based platforms. This platform is used by the High School Robotics Competition I help maintain the software stack for. Currently it runs C++ and Java, but for years there has been interest in running C# as well. I've been working on this off and on for a while now at https://github.com/robotdotnet. One of the biggest issues is I currently use Mono, because the effort to maintain a working build of .NET core for armel is pretty high. It likes to break a lot because many devs like to hardcode arm checks to just the linux-arm RID, which breaks when attempting to build armel. I have done it in the past however, and it does build and run just fine if I fix the issue. So if we could get CI and hopefully a release build of linux-armel, that would be super helpful, and would make the possibility of that project much more feasible to support long term.

Author:	ThadHouse
Assignees:	-
Labels:	area-Infrastructure, untriaged
Milestone:	-

[ViktorHofer]

cc @jkotas

[jkotas]

Are you interested in CoreCLR VM or Mono VM for this?

We have CI build for CoreCLR armel for Tizen: https://github.com/dotnet/runtime/search?q=Tizen_armel

[ThadHouse]

CoreCLR. The Tizen one doesn't fully work, its got some weird dependencies that are difficult to satisfy on normal linux systems.

[jkotas]

I would expect the Tizen armel build to catch most of the armel specific breaks.

The first step for this would be for you to submit a PR that makes the armel build work the way you need. We can then discuss the next steps.