[wiringOP on OPI zero]

hi there,

i'm quite new on arm, so apologize for my stupid questions.

i'm trying to compile example in wiringOP lib. but i got error:

 

• zero@orangepizero:~/WiringOP/examples$ gcc -o blink blink.c -lwiringPi
  //usr/local/lib/libwiringPi.so: undefined reference to `pthread_join'
  //usr/local/lib/libwiringPi.so: undefined reference to `pthread_create'
  //usr/local/lib/libwiringPi.so: undefined reference to `pthread_cancel'
  collect2: error: ld returned 1 exit status

   

i'm running Xenial legacy on orange Zero.

can someone help me please?