BR2_x86_64=y BR2_x86_atom=y BR2_TOOLCHAIN_EXTERNAL=y BR2_TOOLCHAIN_EXTERNAL_CUSTOM=y BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD=y BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/br-x86-64-musl-2020.02.tar.bz2" BR2_TOOLCHAIN_EXTERNAL_GCC_8=y BR2_TOOLCHAIN_EXTERNAL_HEADERS_5_4=y BR2_TOOLCHAIN_EXTERNAL_CUSTOM_MUSL=y BR2_TOOLCHAIN_EXTERNAL_CXX=y