compile osrm with clang

backend/osrm-arm64.Dockerfile

@@ -1,7 +1,7 @@
 FROM docker.io/arm64v8/debian:bookworm AS builder
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
-    build-essential cmake git pkg-config ca-certificates \
+    clang cmake git pkg-config ca-certificates \
     libboost-all-dev libtbb-dev liblua5.4-dev \
     libxml2-dev libzip-dev libbz2-dev \
     && rm -rf /var/lib/apt/lists/*
@@ -11,7 +11,11 @@ RUN git clone --depth=1 --branch ${OSRM_VERSION} \
     https://github.com/Project-OSRM/osrm-backend.git /osrm
 
 RUN cd /osrm && mkdir build && cd build && \
-    cmake .. -DCMAKE_BUILD_TYPE=Release && \
+    cmake .. -DCMAKE_BUILD_TYPE=Release \
+             -DCMAKE_C_COMPILER=clang \
+             -DCMAKE_CXX_COMPILER=clang++ \
+             -DOSRM_BUILD_TESTS=OFF \
+             -DOSRM_BUILD_TOOLS=OFF && \
     make -j$(nproc) osrm-extract osrm-partition osrm-customize osrm-routed && \
     make install