make build -j4 2>&1 | tee -a buildlog.txt WHY???

[LUYUAN1213]

fastboot-burn.bin is Ready.
make[3]: Leaving directory '/home/lu/hi3798mv100/HiSTBLinuxV100R005C00SPC041B020/out/hi3798mv100/hi3798mdmo1d/obj/source/boot/fastboot'
make[2]: Leaving directory '/home/lu/hi3798mv100/HiSTBLinuxV100R005C00SPC041B020/out/hi3798mv100/hi3798mdmo1d/obj/source/boot/fastboot'
make[1]: Leaving directory '/home/lu/hi3798mv100/HiSTBLinuxV100R005C00SPC041B020/source/boot'

make target "build -j4" failed !!!(01:16 (mm:ss))

WHY???? THANK YOU !!!!!!

[chouex]

for those who want to compile, this is how I compile inside docker ubuntu:bionic image

apt install sudo make lsb-release gcc -y
# modify ./server_install.sh
# remark check_tools "gcc" and "make" line
source ./env.sh
./server_install.sh
make menuconfig
make build -j4 2>&1  | tee -a buildlog.txt

make[3]: Leaving directory '/data/hi3798mv100/HiSTBLinuxV100R005C00SPC041B020/sample/openssl/client'
make[2]: Leaving directory '/data/hi3798mv100/HiSTBLinuxV100R005C00SPC041B020/sample/openssl'
make[1]: Leaving directory '/data/hi3798mv100/HiSTBLinuxV100R005C00SPC041B020/sample'
make[1]: warning: jobserver unavailable: using -j1.  Add '+' to parent make rule.
make[1]: Entering directory '/data/hi3798mv100/HiSTBLinuxV100R005C00SPC041B020'
make[1]: Nothing to be done for 'signature'.
make[1]: Leaving directory '/data/hi3798mv100/HiSTBLinuxV100R005C00SPC041B020'

 #### make "build -j4" completed successfully!(01:45 (mm:ss)) ####