Make sure to error on bad arch

Author: gnurizen

test/distro-qemu/build-and-run.sh

@@ -36,8 +36,14 @@ case "$QEMU_ARCH" in
     aarch64)
         DEBOOTSTRAP_ARCH="arm64"
         ;;
+    *)
+        echo "Unsupported QEMU_ARCH: $QEMU_ARCH"
+        exit 1
+        ;;
 esac
 
+GOARCH=$DEBOOTSTRAP_ARCH
+
 # Choose mirror based on distro and architecture
 if [[ "$DISTRO" == "ubuntu" ]]; then
     # Ubuntu ARM64 packages are on ports.ubuntu.com
@@ -63,17 +69,6 @@ sudo chown -R "$(id -u):$(id -g)" "$ROOTFS_DIR"
 # Build the test binary (must be dynamic for dlopen to work)
 echo "Building test binary for $DISTRO $RELEASE $DEBOOTSTRAP_ARCH..."
 
-# Determine Go architecture
-GOARCH="amd64"
-case "$QEMU_ARCH" in
-    x86_64)
-        GOARCH="amd64"
-        ;;
-    aarch64)
-        GOARCH="arm64"
-        ;;
-esac
-
 # For cross-compilation or Ubuntu jammy/noble, local build works (host has compatible or newer glibc)
 # For older distros, would need Docker build (disabled by default for speed)
 if [[ "${USE_DOCKER}" == "1" ]] && command -v docker &> /dev/null; then