fix(ci): Add cross-compilation toolchain for arm64

This adds the cross compilation toolchain and required environment variables to the release workflows and local Dockerfile. These will end up in the dev image, but for now we can specify them manually.

Signed-off-by: Scott Fleener <[email protected]>

Author: sfleen

.github/workflows/release.yml

@@ -145,11 +145,22 @@ jobs:
     env:
       LINKERD2_PROXY_VENDOR: ${{ github.repository_owner }}
       LINKERD2_PROXY_VERSION: ${{ needs.meta.outputs.version }}
+      # TODO: add to dev image
+      AWS_LC_SYS_CFLAGS_aarch64_unknown_linux_gnu: "-fuse-ld=/usr/aarch64-linux-gnu/bin/ld"
+      AWS_LC_SYS_CFLAGS_aarch64_unknown_linux_musl: "-fuse-ld=/usr/aarch64-linux-gnu/bin/ld"
     steps:
       # TODO: add to dev image
       - name: Install MiniGW
         if: matrix.os == 'windows'
         run: apt-get update && apt-get install mingw-w64 -y
+      # TODO: add to dev image
+      - name: Install cross compilation toolchain
+        if: matrix.arch == 'arm64'
+        run: apt-get update && apt-get install --no-install-recommends -y \
+          g++-aarch64-linux-gnu \
+          gcc-aarch64-linux-gnu \
+          binutils-aarch64-linux-gnu \
+          libc6-dev-arm64-cross
       - name: Configure git
         run: git config --global --add safe.directory "$PWD" # actions/runner#2033
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683

Dockerfile

@@ -14,11 +14,16 @@ FROM $LINKERD2_IMAGE as linkerd2
 FROM --platform=$BUILDPLATFORM $RUST_IMAGE as fetch
 
 ARG PROXY_FEATURES=""
+ARG TARGETARCH="amd64"
 RUN apt-get update && \
     apt-get install -y time && \
     if [[ "$PROXY_FEATURES" =~ .*meshtls-boring.* ]] ; then \
       apt-get install -y golang ; \
     fi && \
+    case "$TARGETARCH" in \
+        amd64) true ;; \
+        arm64) apt-get install --no-install-recommends -y libc6-dev-arm64-cross gcc-aarch64-linux-gnu binutils-aarch64-linux-gnu ;; \
+    esac && \
     rm -rf /var/lib/apt/lists/*
 
 ENV CARGO_NET_RETRY=10
@@ -33,7 +38,8 @@ RUN --mount=type=cache,id=cargo,target=/usr/local/cargo/registry \
 FROM fetch as build
 ENV CARGO_INCREMENTAL=0
 ENV RUSTFLAGS="-D warnings -A deprecated --cfg tokio_unstable"
-ARG TARGETARCH="amd64"
+ENV AWS_LC_SYS_CFLAGS_aarch64_unknown_linux_gnu="-fuse-ld=/usr/aarch64-linux-gnu/bin/ld"
+ENV AWS_LC_SYS_CFLAGS_aarch64_unknown_linux_musl="-fuse-ld=/usr/aarch64-linux-gnu/bin/ld"
 ARG PROFILE="release"
 ARG LINKERD2_PROXY_VERSION=""
 ARG LINKERD2_PROXY_VENDOR=""