fix: use cross tool for ARM64 Linux cross-compilation

- Install and use cross-rs/cross for ARM64 builds
- Cross provides Docker containers with proper ARM64 sysroots
- Fixes OpenSSL not found error in cross-compilation

.github/workflows/release.yml

@@ -53,11 +53,9 @@ jobs:
         with:
           targets: ${{ matrix.target }}
 
-      - name: Install cross-compilation tools
+      - name: Install cross tool
         if: matrix.cross
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y gcc-aarch64-linux-gnu g++-aarch64-linux-gnu
+        run: cargo install cross --git https://github.com/cross-rs/cross
 
       - name: Install system dependencies (Linux)
         if: runner.os == 'Linux' && !matrix.cross
@@ -85,18 +83,17 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-${{ matrix.target }}-cargo-target-release-
 
-      - name: Build release binaries (Unix)
-        if: runner.os != 'Windows'
+      - name: Build release binaries (Unix with cross)
+        if: runner.os != 'Windows' && matrix.cross
         env:
           TARGET: ${{ matrix.target }}
-          CROSS: ${{ matrix.cross }}
-        run: |
-          if [[ "$CROSS" == "true" ]]; then
-            export CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=aarch64-linux-gnu-gcc
-            export CC_aarch64_unknown_linux_gnu=aarch64-linux-gnu-gcc
-            export CXX_aarch64_unknown_linux_gnu=aarch64-linux-gnu-g++
-          fi
-          cargo build --release --workspace --target "$TARGET"
+        run: cross build --release --workspace --target "$TARGET"
+
+      - name: Build release binaries (Unix native)
+        if: runner.os != 'Windows' && !matrix.cross
+        env:
+          TARGET: ${{ matrix.target }}
+        run: cargo build --release --workspace --target "$TARGET"
 
       - name: Build release binaries (Windows)
         if: runner.os == 'Windows'