fix aarch64 musl build: use cross instead of musl.cc download

musl.cc was unreachable from CI. cross handles the Docker-based
cross-compilation automatically.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.github/workflows/release.yml

@@ -35,30 +35,28 @@ jobs:
         with:
           targets: ${{ matrix.target }}
 
-      - name: Install cross-compilation tools
+      - name: Install musl tools (x86_64)
-        if: contains(matrix.target, 'linux')
+        if: matrix.target == 'x86_64-unknown-linux-musl'
-        run: |
+        run: sudo apt-get update && sudo apt-get install -y musl-tools
-          sudo apt-get update
-          sudo apt-get install -y musl-tools
-          if [ "${{ matrix.target }}" = "aarch64-unknown-linux-musl" ]; then
-            sudo apt-get install -y gcc-aarch64-linux-gnu musl-dev
-            # Install aarch64 musl cross-compiler
-            wget -q https://musl.cc/aarch64-linux-musl-cross.tgz
-            tar xzf aarch64-linux-musl-cross.tgz -C /opt
-            echo "/opt/aarch64-linux-musl-cross/bin" >> $GITHUB_PATH
-          fi
 
-      - name: Build
+      - name: Install cross (aarch64)
+        if: matrix.target == 'aarch64-unknown-linux-musl'
+        run: cargo install cross
+
+      - name: Build (native)
+        if: matrix.target != 'aarch64-unknown-linux-musl'
         run: cargo build --release --target ${{ matrix.target }}
-        env:
+
-          CARGO_TARGET_AARCH64_UNKNOWN_LINUX_MUSL_LINKER: aarch64-linux-musl-gcc
+      - name: Build (cross)
+        if: matrix.target == 'aarch64-unknown-linux-musl'
+        run: cross build --release --target ${{ matrix.target }}
 
       - name: Package
         run: |
           cd target/${{ matrix.target }}/release
           tar czf ../../../${{ matrix.name }}.tar.gz numa
           cd ../../..
-          sha256sum ${{ matrix.name }}.tar.gz > ${{ matrix.name }}.tar.gz.sha256
+          sha256sum ${{ matrix.name }}.tar.gz > ${{ matrix.name }}.tar.gz.sha256 || shasum -a 256 ${{ matrix.name }}.tar.gz > ${{ matrix.name }}.tar.gz.sha256
 
       - name: Upload artifact
         uses: actions/upload-artifact@v4