Compilitation:
$ make distclean -j
$ ./tools/configure.sh -l qemu-armv8a:nsh_smp
$ make -j
Running:
$ qemu-system-aarch64 -cpu cortex-a53 -smp 4 -nographic -machine virt,virtualization=on,gic-version=3 -net none -chardev stdio,id=con,mux=on -serial chardev:con -mon chardev=con,mode=readline -kernel ./nuttx