When I build the kernel, i encounter undefined reference problem

[Don-James-shrinp]

I run the commands mentioned in the paper:

cd FragVisor/fragvisor−linux
make -j17

then i encountered the problem as below

./arch/x86/include/asm/bitops.h: Assembler messages:
./arch/x86/include/asm/bitops.h:216: Warning: no instruction mnemonic suffix given and no register operands; using default for `bts'
  UPD     include/generated/compile.h
  CC      init/version.o
  LD      init/mounts.o
  LD      init/built-in.o
ld: warning: arch/x86/built-in.o: requires executable stack (because the .note.GNU-stack section is executable)
ld: warning: .tmp_vmlinux1 has a LOAD segment with RWX permissions
ld: arch/x86/built-in.o: in function `smp_popcorn_kmsg_interrupt':
(.text+0x34364): undefined reference to `popcorn_handle_virtio_blk_iowrite'
ld: arch/x86/built-in.o: in function `smp_trace_popcorn_kmsg_interrupt':
(.text+0x3439a): undefined reference to `popcorn_handle_virtio_blk_iowrite'
ld: kernel/built-in.o: in function `vma_server_init':
(.text+0xc86cb): undefined reference to `first'
ld: (.text+0xc86d2): undefined reference to `first'
ld: kernel/built-in.o: in function `process_recvmsg_delegate_request':
hype_kvm.c:(.text+0xcef0b): undefined reference to `khype_vhost_recvmsg_delegate'
ld: kernel/built-in.o: in function `process_peek_head_len_request':
hype_kvm.c:(.text+0xcefb4): undefined reference to `khype_service_peek_head_len'
ld: kernel/built-in.o: in function `process_rx_notification_request':
hype_kvm.c:(.text+0xcf02c): undefined reference to `khype_handle_rx'
ld: kernel/built-in.o: in function `process_tunfd_delegate_request':
hype_kvm.c:(.text+0xcf097): undefined reference to `khype_vhost_tunfd_delegate'
ld: kernel/built-in.o: in function `process_eventfd_delegate_request':
hype_kvm.c:(.text+0xcf231): undefined reference to `hype_eventfd_info'
ld: hype_kvm.c:(.text+0xcf286): undefined reference to `hype_eventfd_info'
ld: kernel/built-in.o: in function `process_remote_kvm_create_request':
hype_kvm.c:(.text+0xcf303): undefined reference to `replay_kvm_dev_ioctl_create_vm_tsk'
ld: kernel/built-in.o: in function `process_ipi_request':
hype_kvm.c:(.text+0xcf5ae): undefined reference to `popcorn_apic_inject_ipi'
ld: hype_kvm.c:(.text+0xcf602): undefined reference to `popcorn_kvm_apic_set_irq'
ld: kernel/built-in.o: in function `process_origin_broadcast_apic_reg_write_request':
hype_kvm.c:(.text+0xcf6c4): undefined reference to `popcorn_apic_reg_write'
ld: kernel/built-in.o: in function `process_update_vcpu_request':
hype_kvm.c:(.text+0xcfa47): undefined reference to `pophype_dump_vmcs'
ld: hype_kvm.c:(.text+0xcfacb): undefined reference to `kvm_arch_vcpu_load'
ld: hype_kvm.c:(.text+0xcfad0): undefined reference to `pophype_dump_vmcs'
ld: hype_kvm.c:(.text+0xcfadf): undefined reference to `kvm_arch_vcpu_ioctl_set_sregs'
ld: hype_kvm.c:(.text+0xcfaf3): undefined reference to `kvm_arch_vcpu_ioctl_set_regs'
ld: hype_kvm.c:(.text+0xcfb03): undefined reference to `pophype_do_set_msr'
ld: hype_kvm.c:(.text+0xcfb08): undefined reference to `pophype_msr_io'
ld: hype_kvm.c:(.text+0xcfb1c): undefined reference to `pophype_vcpu_ioctl_x86_set_xcrs'
ld: hype_kvm.c:(.text+0xcfb28): undefined reference to `kvm_arch_vcpu_ioctl_set_mpstate'
ld: hype_kvm.c:(.text+0xcfb34): undefined reference to `pophype_vcpu_ioctl_set_lapic'
ld: hype_kvm.c:(.text+0xcfb48): undefined reference to `kvm_arch_vcpu_ioctl_set_fpu'
ld: hype_kvm.c:(.text+0xcfb54): undefined reference to `pophype_vcpu_ioctl_x86_set_xsave'
ld: hype_kvm.c:(.text+0xcfb68): undefined reference to `pophype_vcpu_ioctl_x86_set_vcpu_events'
ld: hype_kvm.c:(.text+0xcfb78): undefined reference to `kvm_arch_vcpu_put'
ld: kernel/built-in.o: in function `pophype_show_guest_rip_rsp':
(.text+0xd04da): undefined reference to `kvm_arch_vcpu_ioctl_get_regs'
ld: kernel/built-in.o: in function `eventfd_ctx_to_fd':
(.text+0xd08a5): undefined reference to `hype_eventfd_info'
ld: kernel/built-in.o: in function `eventfd_fd_to_ctx':
(.text+0xd08e1): undefined reference to `hype_eventfd_info'
ld: (.text+0xd0917): undefined reference to `hype_eventfd_info'
ld: kernel/built-in.o: in function `SyS_pophype_migrate_on_hostusr':
(.text+0xd0c29): undefined reference to `pophype_save_vcpu_states'
ld: kernel/built-in.o: in function `SyS_pophype_vcpu_migrate_trigger':
(.text+0xd0c81): undefined reference to `kvm_vcpu_kick'
ld: (.text+0xd0c8e): undefined reference to `kvm_vcpu_kick'
ld: (.text+0xd0c9b): undefined reference to `kvm_vcpu_kick'
ld: (.text+0xd0ca8): undefined reference to `kvm_vcpu_kick'
ld: (.text+0xd0cb5): undefined reference to `kvm_vcpu_kick'
ld: (.text+0xd0d47): undefined reference to `kvm_arch_vcpu_should_kick'
ld: kernel/built-in.o: in function `popcorn_update_remote_vcpu':
(.text+0xd12f3): undefined reference to `is_saved_vcpu'
ld: (.text+0xd1401): undefined reference to `pophype_dump_vmcs'
ld: (.text+0xd140a): undefined reference to `pophype_get_mp_state'
ld: (.text+0xd1417): undefined reference to `pophype_get_regs'
ld: (.text+0xd1424): undefined reference to `pophype_get_sregs'
ld: (.text+0xd1431): undefined reference to `pophype_get_fpu'
ld: (.text+0xd143e): undefined reference to `pophype_get_xcrs'
ld: (.text+0xd144b): undefined reference to `pophype_get_lapic'
ld: (.text+0xd1457): undefined reference to `pophype_get_xsave'
ld: (.text+0xd1464): undefined reference to `pophype_get_vcpu_event'
ld: (.text+0xd1470): undefined reference to `pophype_get_msrs'
ld: kernel/built-in.o: in function `delegate_net_msg_tx':
(.text+0xd18d7): undefined reference to `kvm_arch_vcpu_ioctl_translate'
ld: (.text+0xd1907): undefined reference to `kvm_vcpu_gfn_to_hva'
ld: kernel/built-in.o: in function `delegate_skb_tx':
(.text+0xd1da5): undefined reference to `kvm_arch_vcpu_ioctl_translate'
ld: (.text+0xd1dce): undefined reference to `kvm_vcpu_gfn_to_hva'
make: *** [Makefile:964: vmlinux] Error 1

[kirchhoff]

Can anyone help to fix it? I encounter the same problem.