Add new clang to sbsa

Author: milot-mirdita

Dockerfile.GPU-buster-cross-sbsa

@@ -21,3 +21,35 @@ RUN apt-get install -y cuda-nvcc-${VER} cuda-nvcc-cross-sbsa-${VER} cuda-cudart-
 RUN curl https://sh.rustup.rs -sSf | \
     sh -s -- --default-toolchain stable -y
 ENV PATH=/root/.cargo/bin:$PATH
+
+RUN curl https://apt.llvm.org/llvm.sh -sSf | \
+        bash -s -- 20; \
+    echo "set(CMAKE_SYSTEM_NAME Linux)" > /opt/toolchain.cmake; \
+    echo "set(CMAKE_SYSTEM_PROCESSOR aarch64)" >> /opt/toolchain.cmake; \
+    echo "set(CMAKE_C_COMPILER /opt/clang-aarch64)" >> /opt/toolchain.cmake; \
+    echo "set(CMAKE_CXX_COMPILER /opt/clang++-aarch64)" >> /opt/toolchain.cmake; \
+    echo 'set(CMAKE_CUDA_HOST_COMPILER ${CMAKE_CXX_COMPILER})' >> /opt/toolchain.cmake; \
+    echo "set(CMAKE_CUDA_COMPILER /usr/local/cuda/bin/nvcc)" >> /opt/toolchain.cmake; \
+    echo 'set(CMAKE_CUDA_FLAGS "-t 0 --split-compile=0 -allow-unsupported-compiler")' >> /opt/toolchain.cmake; \
+    echo 'set(CMAKE_CUDA_LINK_FLAGS "-t 0 --split-compile=0 -allow-unsupported-compiler")' >> /opt/toolchain.cmake; \
+    echo '#!/bin/sh\n/usr/bin/clang-20 --target=aarch64-linux-gnu "${@}"\n' > /opt/clang-aarch64; \
+    echo '#!/bin/sh\n/usr/bin/clang++-20 --target=aarch64-linux-gnu "${@}"\n' > /opt/clang++-aarch64; \
+    chmod +x /opt/clang-aarch64 /opt/clang++-aarch64; \
+    cat /opt/clang-aarch64 /opt/clang++-aarch64;
+
+ENV OMPVERSION=20.1.7
+ENV LIBOMP_AARCH64="/opt/build_libomp/openmp-${OMPVERSION}.src/build-arm64/runtime/src"
+RUN mkdir -p build_libomp && cd build_libomp; \
+    wget -qO- https://github.com/llvm/llvm-project/releases/download/llvmorg-${OMPVERSION}/cmake-${OMPVERSION}.src.tar.xz | tar xJvf -; \
+    wget -qO- https://github.com/llvm/llvm-project/releases/download/llvmorg-${OMPVERSION}/openmp-${OMPVERSION}.src.tar.xz | tar xJvf -; \
+    mv cmake-${OMPVERSION}.src cmake; \
+    cd openmp-${OMPVERSION}.src; \
+    mkdir -p build-arm64 && cd build-arm64; \
+    cmake \
+        -GNinja \
+        -DLIBOMP_ENABLE_SHARED=OFF \
+        -DLIBOMP_INSTALL_ALIASES=OFF \
+        -DLIBOMP_ARCH=aarch64 \
+        -DCMAKE_TOOLCHAIN_FILE=/opt/toolchain.cmake \
+        ..; \
+    cmake --build . -j$(nproc --all) -v;