Add ppc64le support

[drchristensen]

Unable to use GitVersion application on Linux systems with ppc64le architecture. For example:

$ dotnet-gitversion /home/user/src/GitVersion
The type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception.

Add support to build native ppc64le binaries along with other supported CPU architectures.

[bording]

I have questions about this change.

First, what sort of machine are you using that even has this sort of processor in it?

Second, where did you get a .NET distribution that works on it? Microsoft doesn't support or ship .NET for anything other than x64, arm32, and arm64.

[drchristensen]

IBM, Microsoft and RedHat have announced support for .NET 7/8 on POWER, you can find out more about it on the IBM .NET blog. Microsoft supports installing .NET on Linux as described here. In my use case, I'm building a project on Fedora 40 in a VM hosted on a P9 PowerNV system. Installing the GitVersion tool is as simple as running dotnet tool install --global GitVersion.Tool.

[drchristensen]

The blog post also mentions support for IBM s390x mainframes, though I don't think the build containers used actually had the appropriate s390 cross compilers.

[bording]

Ok, so it's specifically Red Hat that is building a shipping .NET for that architecture.

Can you run dotnet --info and provide the output here? I want to confirm a few things (like what the RID actually shows up as) before merging this.

[bording]

Also, it doesn't seem like we'd need the musl variation since RHEL uses glibc and not musl.

[bording]

@drchristensen I went ahead and pulled your changes into another branch and made some tweaks (and I needed to rebase anyway to react to changes from #160) : #161

[drchristensen]

Late reply on your dotnet --info question. Output included below from Fedora 41:

$ dotnet --info
.NET SDK:
 Version:           9.0.100-rc.2.24474.1
 Commit:            b4c156e3f6
 Workload version:  9.0.100-manifests.1d9add2b
 MSBuild version:   17.12.0-preview-24473-03+b4c156e3f

Runtime Environment:
 OS Name:     fedora
 OS Version:  41
 OS Platform: Linux
 RID:         fedora.41-ppc64le
 Base Path:   /usr/lib64/dotnet/sdk/9.0.100-rc.2.24474.1/

.NET workloads installed:
There are no installed workloads to display.
Configured to use loose manifests when installing new manifests.

Host:
  Version:      9.0.0-rc.2.24473.5
  Architecture: ppc64le
  Commit:       b4c156e3f6

.NET SDKs installed:
  8.0.110 [/usr/lib64/dotnet/sdk]
  9.0.100-rc.2.24474.1 [/usr/lib64/dotnet/sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 8.0.10 [/usr/lib64/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 9.0.0-rc.2.24474.3 [/usr/lib64/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 8.0.10 [/usr/lib64/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 9.0.0-rc.2.24473.5 [/usr/lib64/dotnet/shared/Microsoft.NETCore.App]

Other architectures found:
  None

Environment variables:
  DOTNET_ROOT       [/usr/lib64/dotnet]

global.json file:
  Not found

Learn more:
  https://aka.ms/dotnet/info

Download .NET:
  https://aka.ms/dotnet/download