[llvm] [libc][workflow] improve ci coverage with windows-2024 and arm ubuntu (PR #123745)

[Tom Stellard via llvm-commits]

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@@ -42,10 +47,16 @@ jobs:
     # - Debian has a multilib setup, so we need to symlink the asm directory.
     #   For more information, see https://wiki.debian.org/Multiarch/LibraryPathOverview
     - name: Prepare dependencies (Ubuntu)
+      shell: bash
       run: |
         sudo apt-get update
         sudo apt-get install -y libmpfr-dev libgmp-dev libmpc-dev ninja-build linux-libc-dev
         sudo ln -sf /usr/include/$(uname -p)-linux-gnu/asm /usr/include/asm
+        if [[ $(uname -m) == 'aarch64' ]]; then
+          wget https://github.com/mozilla/sccache/releases/download/v0.9.1/sccache-v0.9.1-aarch64-unknown-linux-musl.tar.gz
+          tar xvaf sccache-v0.9.1-aarch64-unknown-linux-musl.tar.gz
+          sudo cp sccache-v0.9.1-aarch64-unknown-linux-musl/sccache /usr/bin
+        fi
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tstellar wrote:

Can you do a checksum check here like we do [here](https://github.com/llvm/llvm-project/blob/main/.github/workflows/containers/github-action-ci/Dockerfile#L75)

Alternatively, you could use ccache instead of sccache.  The ccache-action is able to install ccache on ARM.

https://github.com/llvm/llvm-project/pull/123745