1*4882a593SmuzhiyunBR2_aarch64=y 2*4882a593SmuzhiyunBR2_TOOLCHAIN_EXTERNAL=y 3*4882a593SmuzhiyunBR2_TOOLCHAIN_EXTERNAL_BOOTLIN=y 4*4882a593SmuzhiyunBR2_TOOLCHAIN_EXTERNAL_BOOTLIN_AARCH64_GLIBC_STABLE=y 5