try to fix linux-arm64 build

Author: karlseguin

.github/workflows/build-release.yml

@@ -108,15 +108,11 @@ jobs:
       - run: |
           sudo apt-get update
           sudo apt-get install -yq libglib2.0-dev lld
-
           wget https://apt.llvm.org/llvm.sh
           chmod +x llvm.sh
-          sudo ./llvm.sh 18
-
-          pushd /usr/lib/llvm-18/lib/clang/18/lib/
-            sudo ln -nsf linux/libclang_rt.builtins-aarch64.a linux/libclang_rt.builtins.a
-            sudo ln -nsf linux/ aarch64-unknown-linux-gnu
-          popd
+          sudo ./llvm.sh 21
+          sudo ln -nsf /usr/lib/llvm-21/lib/clang/21/lib/linux/libclang_rt.builtins-aarch64.a /usr/lib/llvm-21/lib/clang/21/lib/linux/libclang_rt.builtins.a && \
+          sudo ln -nsf /usr/lib/llvm-21/lib/clang/21/lib/linux/ /usr/lib/llvm-21/lib/clang/21/lib/aarch64-unknown-linux-gnu
 
       - run: zig build get-v8
       - run: zig build -Doptimize=ReleaseSafe

build-tools/build_v8.sh

@@ -26,7 +26,7 @@ cp BUILD.gn src/zig/
 
 EXTRA_ARGS=""
 if [ "${OS}" = "linux" ] && [ "${ARCH}" == "arm64" ]; then
-  EXTRA_ARGS="clang_base_path=\"/usr/lib/llvm-18\" clang_use_chrome_plugins=false"
+  EXTRA_ARGS="clang_base_path=\"/usr/lib/llvm-21\" clang_use_chrome_plugins=false treat_warnings_as_errors=false"
 fi
 
 TARGET_ARCH=${ARCH}