how can i fix this error.(simulink)

arduino-1.8.1/hardware/tools/avr/bin/avr-gcc -std=gnu11 -c -g -w -ffunction-sections -fdata-sections -MMD -DARDUINO=10801 -MMD -MP -MF"untitled.dep" -MT"untitled.o" -Os -mmcu=atmega2560 -DF_CPU=16000000L -DARDUINO_AVR_MEGA2560 -DARDUINO_ARCH_AVR -D_RUNONTARGETHARDWARE_BUILD_ -D_ROTH_MEGA2560_ -DMODEL=untitled -DNUMST=1 -DNCSTATES=0 -DHAVESTDIO -DINTEGER_CODE=0 -DMT=0 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DONESTEPFCN=1 -DTERMFCN=1 -DMULTI_INSTANCE_CODE=0 -DTID01EQ=0 -DEXIT_FAILURE=1 -DEXTMODE_DISABLEPRINTF -DEXTMODE_DISABLETESTING -DEXTMODE_DISABLE_ARGS_PROCESSING=1 -DSTACK_SIZE=64 -D__MW_TARGET_USE_HARDWARE_RESOURCES_H__ -DRT -DMW_TIMERID=5 -DMW_PRESCALAR=256 -DMW_TIMERCOUNT=34286 -DMW_SCHEDULERCOUNTER=1 -D_RTT_BAUDRATE_SERIAL0_=9600 -D_RTT_BAUDRATE_SERIAL1_=9600 -D_RTT_BAUDRATE_SERIAL2_=9600 -D_RTT_BAUDRATE_SERIAL3_=9600 -D_RTT_ANALOG_REF_=0 -DINTEGER_CODE=0 -DMT=0 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DONESTEPFCN=1 -DTERMFCN=1 -DMULTI_INSTANCE_CODE=0 -DTID01EQ=0 -DEXIT_FAILURE=1 -DEXTMODE_DISABLEPRINTF -DEXTMODE_DISABLETESTING -DEXTMODE_DISABLE_ARGS_PROCESSING=1 -DSTACK_SIZE=64 -DRT -DMODEL=untitled -DNUMST=1 -DNCSTATES=0 -DHAVESTDIO -IC:/Users/bird/Documents/MATLAB -IC:/Users/bird/Documents/MATLAB/untitled_ert_rtw -IC:/Users/bird/Desktop -IC:/PROGRA~1/MATLAB/R2017b/extern/include -IC:/PROGRA~1/MATLAB/R2017b/simulink/include -IC:/PROGRA~1/MATLAB/R2017b/rtw/c/src -IC:/PROGRA~1/MATLAB/R2017b/rtw/c/src/ext_mode/common -IC:/PROGRA~1/MATLAB/R2017b/rtw/c/ert -Iarduino-1.8.1/hardware/arduino/avr/cores/arduino -Iarduino-1.8.1/hardware/arduino/avr/variants/mega -IC:/ProgramData/MATLAB/SupportPackages/R2017b/toolbox/target/supportpackages/arduinotarget/include -IC:/ProgramData/MATLAB/SupportPackages/R2017b/toolbox/target/supportpackages/arduinotarget/scheduler/include -IC:/ProgramData/MATLAB/SupportPackages/R2017b/toolbox/target/supportpackages/arduinobase/include -Iarduino-1.8.1/hardware/tools/avr/avr/include/avr -IC:/ProgramData/MATLAB/SupportPackages/R2017b/toolbox/target/shared/externalmode_daemon/include -o untitled.o untitled.c 'arduino-1.8.1' is not recognized as an internal or external command, operable program or batch file. gmake: * [untitled.o] Error 1 The make command returned an error of 2 'An_error_occurred_during_the_call_to_make' is not recognized as an internal or external command, operable program or batch file.