1. git clone https://github.com/SWRT-dev/bcmhnd-toolchains

2. cd bcmhnd-toolchains

3. sudo mkdir -p /opt/toolchains/

   sudo ln -sf $(pwd)/crosstools-aarch64-gcc-5.3-linux-4.1-glibc-2.22-binutils-2.25 /opt/toolchains/

   sudo ln -sf $(pwd)/crosstools-arm-gcc-5.3-linux-4.1-glibc-2.22-binutils-2.25 /opt/toolchains/

   sudo ln -sf $(pwd)/crosstools-aarch64-gcc-5.3-linux-4.1-glibc-2.24-binutils-2.25 /opt/toolchains/

   sudo ln -sf $(pwd)/crosstools-aarch64-gcc-5.5-linux-4.1-glibc-2.26-binutils-2.28.1 /opt/toolchains/

   sudo ln -sf $(pwd)/crosstools-arm-gcc-5.3-linux-4.1-glibc-2.24-binutils-2.25 /opt/toolchains/

   sudo ln -sf $(pwd)crosstools-arm-gcc-5.5-linux-4.1-glibc-2.26-binutils-2.28.1 /opt/toolchains/

   sudo ln -sf $(pwd)/crosstools-gcc-5.3-linux-4.1-uclibc-1.0.12-glibc-2.24-binutils-2.25 /opt/toolchains/

   sudo ln -sf $(pwd)/crosstools-aarch64-gcc-9.2-linux-4.19-glibc-2.30-binutils-2.32 /opt/toolchains/

   sudo ln -sf $(pwd)/crosstools-arm-gcc-9.2-linux-4.19-glibc-2.30-binutils-2.32 /opt/toolchains/

   sudo ln -sf $(pwd)/crosstools-arm_softfp-gcc-10.3-linux-4.19-glibc-2.32-binutils-2.36.1 /opt/toolchains/

   sudo ln -sf $(pwd)/crosstools-aarch64-gcc-10.3-linux-4.19-glibc-2.32-binutils-2.36.1 /opt/toolchains/

   sudo mkdir -p /projects/

   sudo mkdir -p /projects/bca/

   sudo mkdir -p /projects/bca/tools/

   sudo mkdir -p /projects/bca/tools/linux/

   sudo mkdir -p /projects/bca/tools/linux/bin/

   sudo ln -sf $(pwd)/hndtools-armeabi-2013.11 /projects/bca/tools/linux/

   sudo ln -sf $(pwd)/fwtag.ini /projects/bca/tools/linux/bin/

   sudo ln -sf /projects/bca /projects/hnd