build: switch Linux builds from glibc to musl

Author: nikomatsakis

.github/workflows/release-binaries.yml

@@ -21,15 +21,12 @@ jobs:
           - target: aarch64-apple-darwin
             os: macos-latest
             artifact: symposium-darwin-arm64
-          - target: x86_64-unknown-linux-gnu
+          - target: x86_64-unknown-linux-musl
             os: ubuntu-latest
             artifact: symposium-linux-x64
-          - target: aarch64-unknown-linux-gnu
+          - target: aarch64-unknown-linux-musl
             os: ubuntu-latest
             artifact: symposium-linux-arm64
-          - target: x86_64-unknown-linux-musl
-            os: ubuntu-latest
-            artifact: symposium-linux-x64-musl
           - target: x86_64-pc-windows-msvc
             os: windows-latest
             artifact: symposium-windows-x64
@@ -48,22 +45,26 @@ jobs:
         with:
           targets: ${{ matrix.target }}
 
-      - name: Install cross-compilation tools (Linux ARM64)
-        if: matrix.target == 'aarch64-unknown-linux-gnu'
+      - name: Install musl tools (x86_64)
+        if: matrix.target == 'x86_64-unknown-linux-musl'
         run: |
           sudo apt-get update
-          sudo apt-get install -y gcc-aarch64-linux-gnu
+          sudo apt-get install -y musl-tools
 
-      - name: Install musl tools
-        if: matrix.target == 'x86_64-unknown-linux-musl'
+      - name: Install musl cross-compilation tools (aarch64)
+        if: matrix.target == 'aarch64-unknown-linux-musl'
         run: |
           sudo apt-get update
-          sudo apt-get install -y musl-tools
+          sudo apt-get install -y musl-tools gcc-aarch64-linux-gnu musl-dev
+          # Install aarch64 musl cross toolchain
+          wget -q https://musl.cc/aarch64-linux-musl-cross.tgz
+          tar -xzf aarch64-linux-musl-cross.tgz
+          echo "$PWD/aarch64-linux-musl-cross/bin" >> $GITHUB_PATH
 
       - name: Build
         run: cargo build --release --target ${{ matrix.target }} -p symposium-acp-agent
         env:
-          CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER: aarch64-linux-gnu-gcc
+          CARGO_TARGET_AARCH64_UNKNOWN_LINUX_MUSL_LINKER: aarch64-linux-musl-gcc
 
       - name: Package (Unix)
         if: runner.os != 'Windows'