DHT11 troubles in assembly code

hi! have problem dht library in assembly code

can that

this error message:


c:\users\mauricio\appdata\local\temp\build1496615171511360210.tmp\assemblycode.s.o: in function `humedad':
c:\users\mauricio\appdata\local\temp\build1496615171511360210.tmp/assemblycode.s:45: undefined reference `dht'
collect2.exe: error: ld returned 1 exit status
error de compilación

and asm code:

.extern dht
.extern analogread
.extern arduino.h

.global setup
.global loop

setup:
cbi 0x14,2 //a2 humedad
cbi 0x11,1 // a1 fotocelda
cbi 0x11,0 // a0 sen receptor

sbi 0x17,3 // d11 leds fondo
sbi 0x17,4 // d12 led noti azul
sbi 0x17,5 // d13 led noti rojo
ret

loop:
    sbi 0x18,3
    clr r24
    clr r25
    mov r24,1
    mov r25,1
    rcall analogread
    cpi r24,169
    brmi foto
    cbi 0x18,4
    rjmp loop   

foto:
    clr r24
    clr r25
    mov r24,2
    mov r25,2
    rcall analogread
    cpi r24,247
    brmi error
    sbi 0x18,5
    rjmp loop

humedad:
    clr r24
    clr r25
    mov
    rcall dht
    //ldi r16, dht.readtemperature
   
   
error:
    sbi 0x18,4
    cbi 0x18,5
    rjmp loop

how compile assembly code?

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