Using SITL sim_vehicle.py build failed

Hello everyone,
I’m using SITL but it built failed when I ran sim_vehicle.py.
Can anyone help me?

Tools/autotest/sim_vehicle.py -v Rover
SIM_VEHICLE: Start
SIM_VEHICLE: Killing tasks
SIM_VEHICLE: Starting up at SITL location
SIM_VEHICLE: WAF build
SIM_VEHICLE: Configure waf
SIM_VEHICLE: “/home/partee/partee411/ardupilot/modules/waf/waf-light” “configure” “–board” “sitl”
Setting top to : /home/partee/partee411/ardupilot
Setting out to : /home/partee/partee411/ardupilot/build
Autoconfiguration : enabled
Setting board to : sitl
Using toolchain : native
Checking for ‘g++’ (C++ compiler) : /usr/lib/ccache/g++
Checking for ‘gcc’ (C compiler) : /usr/lib/ccache/gcc
Checking for c flags ‘-MMD’ : yes
Checking for cxx flags ‘-MMD’ : yes
CXX Compiler : g++ 7.5.0
Checking for need to link with librt : not necessary
Checking for feenableexcept : yes
Checking for HAVE_CMATH_ISFINITE : yes
Checking for HAVE_CMATH_ISINF : yes
Checking for HAVE_CMATH_ISNAN : yes
Checking for NEED_CMATH_ISFINITE_STD_NAMESPACE : yes
Checking for NEED_CMATH_ISINF_STD_NAMESPACE : yes
Checking for NEED_CMATH_ISNAN_STD_NAMESPACE : yes
Checking for header endian.h : yes
Checking for header byteswap.h : yes
Checking for HAVE_MEMRCHR : yes
Checking for program ‘python’ : /usr/bin/python
Checking for python version >= 2.7.0 : 2.7.17
Checking for program ‘python’ : /usr/bin/python
Checking for python version >= 2.7.0 : 2.7.17
Source is git repository : yes
Update submodules : yes
Checking for program ‘git’ : /usr/bin/git
Checking for program ‘size’ : /usr/bin/size
Benchmarks : disabled
Unit tests : enabled
Scripting : enabled
Scripting runtime checks : enabled
Debug build : disabled
Coverage build : disabled
Checking for program ‘rsync’ : /usr/bin/rsync
‘configure’ finished successfully (0.862s)
SIM_VEHICLE: Building
SIM_VEHICLE: “/home/partee/partee411/ardupilot/modules/waf/waf-light” “build” “–target” “bin/ardurover”
Waf: Entering directory /home/partee/partee411/ardupilot/build/sitl' Embedding file locations.txt:Tools/autotest/locations.txt Embedding file models/Callisto.json:Tools/autotest/models/Callisto.json [836/836] Linking build/sitl/bin/ardurover lib/libRover_libs.a(CygbotParser.c.0.o): In function CygParser’:
CygbotParser.c:(.text.CygParser+0xa4): undefined reference to Init_Packt' CygbotParser.c:(.text.CygParser+0x199): undefined reference to Init_Packt’
CygbotParser.c:(.text.CygParser+0x1d3): undefined reference to Init_Packt' CygbotParser.c:(.text.CygParser+0x226): undefined reference to Init_Packt’
collect2: error: ld returned 1 exit status

Waf: Leaving directory `/home/partee/partee411/ardupilot/build/sitl’
Build failed
** → task in ‘bin/ardurover’ failed (exit status 1): **
** {task 140001189088080: cxxprogram** AP_Arming.cpp.37.o,AP_Rally.cpp.37.o,GCS_Mavlink.cpp.37.o,GCS_Rover.cpp.37.o,Log.cpp.37.o,Parameters.cpp.37.o,RC_Channel.cpp.37.o,Rover.cpp.37.o,Rover_golf.cpp.37.o,Steering.cpp.37.o,afs_rover.cpp.37.o,balance_bot.cpp.37.o,commands.cpp.37.o,crash_check.cpp.37.o,cruise_learn.cpp.37.o,ekf_check.cpp.37.o,failsafe.cpp.37.o,fence.cpp.37.o,mode.cpp.37.o,mode_acro.cpp.37.o,mode_auto.cpp.37.o,mode_follow.cpp.37.o,mode_go_batt.cpp.37.o,mode_guided.cpp.37.o,mode_hold.cpp.37.o,mode_loiter.cpp.37.o,mode_manual.cpp.37.o,mode_rtl.cpp.37.o,mode_simple.cpp.37.o,mode_smart_rtl.cpp.37.o,mode_steering.cpp.37.o,motor_test.cpp.37.o,radio.cpp.37.o,sailboat.cpp.37.o,sensors.cpp.37.o,system.cpp.37.o → ardurover}
(run with -v to display more information)
SIM_VEHICLE: Build failed
SIM_VEHICLE: Killing tasks