On 6/11/15 12:35 AM, Wangnan (F) wrote:
Now I'm trying this:"$CLANG_EXEC $CLANG_OPTIONS $KERNEL_INC_OPTIONS " "-Wno-unused-value -Wno-pointer-sign " "-working-directory $WORKING_DIR " " -c \"$CLANG_SOURCE\" -march=bpf -O2 -o -" WORKING_DIR is appended because we will get relative include directory using the Makefile trick.
clang bpf support is in. so please pull the latest llvm and clang, rebuild and you should be able to use: clang -O2 -target bpf -c file.c Just like any other arch use -S to generate .s and so on. Old style 'clang -emit-llvm -o - | llc -march=bpf' is fine too. To build llvm/clang do: git clone https://github.com/llvm-mirror/llvm.git git clone https://github.com/llvm-mirror/clang.git llvm/tools/clang mkdir llvm/build/ cd llvm/build/ cmake .. \ -DCMAKE_BUILD_TYPE=Release \ -DLLVM_TARGETS_TO_BUILD="X86;BPF" \ -DCMAKE_INSTALL_PREFIX=/opt/local/llvm make -j sudo make install -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
