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CoreCLR runtime tests + Mono LLVM AOT on arm64 Linux (#41751)

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This change:

- Adds new options to mono.proj:

    - MonoAOTEnableLLVM, which enables (or disables) building a Mono AOT
    cross compiler with LLVM;

    - MonoAOTLLVMDir, which specifies the path to a copy of LLVM suitable for
    building a Mono AOT cross compiler, and is optional; and

    - BuildMonoAOTCrossCompilerOnly, which allows building a Mono AOT
    cross compiler without building an associated full Mono runtime.

- Changes offsets-tool.py's user interface slightly; '--include-prefix' is
renamed to '--prefix' and may be specified multiple times. While this latter
feature isn't necessary to build a Mono cross compiler today, because we don't
use distribution-supplied cross-compilation headers on CI, it does make it
easier to experiment with the offsets tool using arbitrary header layouts.  For
example, Debian's arm64 cross-compilation packages scatter useful header files
across `/usr/lib/gcc-cross/aarch64-linux-gnu` and `/usr/aarch64-linux-gnu`.

- Updates the docker image used for arm64 cross-compilation to a newer revision
that includes libclang (see also
https://github.com/dotnet/dotnet-buildtools-prereqs-docker/pull/375).

- Adds some tests that currently fail to compile with Mono LLVM AOT to
issues.targets.

- Adds a Linux_arm64 LLVM AOT job to CI. Nothing particularly fancy is done to
build the Mono LLVM AOT cross compiler; it is built as a step in the same job
that also sends Linux_arm64 tests to Helix.
This commit is contained in:
imhameed 2020-10-26 09:38:25 -07:00 • committed by GitHub
parent c4361584ff
commit 5e6de70217
Signed by: github
GPG key ID: 4AEE18F83AFDEB23
15 changed files with 151 additions and 43 deletions
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docs/workflow/building/coreclr/linux-instructions.md
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@ -53,7 +53,7 @@ This table of images might often become stale as we change our images as our req
| Alpine | x64 | `mcr.microsoft.com/dotnet-buildtools/prereqs:alpine-3.9-WithNode-0fc54a3-20190918214015` | - | -clang9 |
| CentOS 7 (build for RHEL 7) | x64 | `mcr.microsoft.com/dotnet-buildtools/prereqs:centos-7-359e48e-20200313130914` | - | -clang9 |
| Ubuntu 16.04 | arm32 (armhf) | `mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-16.04-cross-20200413125008-09ec757` | `/crossrootfs/arm` | -clang9 |
| Ubuntu 16.04 | arm64 (arm64v8) | `mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-16.04-cross-arm64-20200413125008-cfdd435` | `/crossrootfs/arm64` | -clang9 |
| Ubuntu 16.04 | arm64 (arm64v8) | `mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-16.04-cross-arm64-20201022204150-b2c2436` | `/crossrootfs/arm64` | -clang9 |
| Alpine | arm64 (arm64v8) | `mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-16.04-cross-arm64-alpine-20200413125008-406629a` | `/crossrootfs/arm64` | -clang5.0 |
Environment