ci: Add Linux ARM64 build and test support (glibc and musl)

.github/workflows/release.yml

@@ -106,13 +106,21 @@ jobs:
 
             ### Linux
             ```bash
-            # GNU (most distributions)
+            # GNU (most distributions) - x86_64
             curl -L -o uvm https://github.com/${{ github.repository }}/releases/download/${{ github.ref_name }}/uvm-x86_64-unknown-linux-gnu
             chmod +x uvm
 
-            # Musl (Alpine, static binary)
+            # GNU (most distributions) - ARM64
+            curl -L -o uvm https://github.com/${{ github.repository }}/releases/download/${{ github.ref_name }}/uvm-aarch64-unknown-linux-gnu
+            chmod +x uvm
+
+            # Musl (Alpine, static binary) - x86_64
             curl -L -o uvm https://github.com/${{ github.repository }}/releases/download/${{ github.ref_name }}/uvm-x86_64-unknown-linux-musl
             chmod +x uvm
+
+            # Musl (Alpine, static binary) - ARM64
+            curl -L -o uvm https://github.com/${{ github.repository }}/releases/download/${{ github.ref_name }}/uvm-aarch64-unknown-linux-musl
+            chmod +x uvm
             ```
 
             ### Windows
@@ -150,15 +158,21 @@ jobs:
             os: windows-latest
             use-zigbuild: false
 
-          # Linux GNU target (native)
+          # Linux GNU targets
           - target: x86_64-unknown-linux-gnu
             os: ubuntu-latest
             use-zigbuild: false
+          - target: aarch64-unknown-linux-gnu
+            os: ubuntu-24.04-arm
+            use-zigbuild: false
 
-          # Linux musl target (cross-compile with zigbuild)
+          # Linux musl targets (cross-compile with zigbuild)
           - target: x86_64-unknown-linux-musl
             os: ubuntu-latest
             use-zigbuild: true
+          - target: aarch64-unknown-linux-musl
+            os: ubuntu-24.04-arm
+            use-zigbuild: true
 
     steps:
       - name: Checkout code

.github/workflows/rust.yml

@@ -34,10 +34,18 @@ jobs:
           - target: aarch64-apple-darwin
             os: macos-latest
             use-zigbuild: false
+          # Linux ARM64 glibc (native on ARM runners)
+          - target: aarch64-unknown-linux-gnu
+            os: ubuntu-24.04-arm
+            use-zigbuild: false
           # Cross-compile with zigbuild
           - target: x86_64-unknown-linux-musl
             os: ubuntu-latest
             use-zigbuild: true
+          # Linux ARM64 musl (native on ARM runners)
+          - target: aarch64-unknown-linux-musl
+            os: ubuntu-24.04-arm
+            use-zigbuild: true
 
     steps:
     - name: Checkout code
@@ -80,11 +88,11 @@ jobs:
       shell: bash
 
     - name: Run tests
-      # Skip tests for cross-compiled targets and Windows ARM64 (cross-compiled)
-      if: matrix.use-zigbuild == false && matrix.target != 'aarch64-pc-windows-msvc'
+      # Skip tests for cross-compiled targets (zigbuild, Windows ARM64, Linux ARM64)
+      if: matrix.use-zigbuild == false && matrix.target != 'aarch64-pc-windows-msvc' && matrix.target != 'aarch64-unknown-linux-gnu'
       run: cargo test --target ${{ matrix.target }} --verbose --release
 
     - name: Run UVM help
-      # Skip help test for cross-compiled targets and Windows ARM64 (cross-compiled)
-      if: matrix.use-zigbuild == false && matrix.target != 'aarch64-pc-windows-msvc'
+      # Skip help test for cross-compiled targets (zigbuild, Windows ARM64, Linux ARM64)
+      if: matrix.use-zigbuild == false && matrix.target != 'aarch64-pc-windows-msvc' && matrix.target != 'aarch64-unknown-linux-gnu'
       run: cargo run --target ${{ matrix.target }} --bin uvm --release -- --help

uvm_live_platform/src/model/platform.rs

@@ -12,7 +12,10 @@ pub enum UnityReleaseDownloadArchitecture {
 
 impl Default for UnityReleaseDownloadArchitecture {
     fn default() -> Self {
-        if cfg!(target_arch = "x86_64") {
+        // On Linux, always use x86_64 regardless of the actual architecture
+        if cfg!(target_os = "linux") {
+            Self::X86_64
+        } else if cfg!(target_arch = "x86_64") {
             Self::X86_64
         } else if cfg!(target_arch = "aarch64") {
             Self::Arm64