core-3588J build kernel error

wx__KIyr4p

platform:core-3588J
Ubuntu version:20.04

Error Info:

root@lM415-D071:/home/3588/Linux_SDK-o/rk3588# ./build.sh kernel
processing option: kernel
============Start building kernel============
TARGET_ARCH          =arm64
TARGET_KERNEL_CONFIG =rockchip_linux_defconfig
TARGET_KERNEL_DTS    =rk3588-firefly-itx-3588j
TARGET_KERNEL_CONFIG_FRAGMENT =firefly-linux.config
==========================================
/home/3588/Linux_SDK-o/rk3588
scripts/Kconfig.include:40: linker 'aarch64-none-linux-gnu-ld' not found
make[2]: *** [scripts/kconfig/Makefile:88：rockchip_linux_defconfig] 错误 1
make[1]: *** [Makefile:632：rockchip_linux_defconfig] 错误 2
make: *** [Makefile:352: __build_one_by_one] Error 2
ERROR: Running build_kernel failed!
ERROR: exit code 2 from line 598:
    make ARCH=$RK_ARCH $RK_KERNEL_DEFCONFIG $RK_KERNEL_DEFCONFIG_FRAGMENT

wx__KIyr4p

I have resolved it. Because i did not use root count to execute "./build.sh itx-3588j-ubuntu.mk "