issues on compiling OpenVX Code


I am new to OpnVX, I installed the OpenVX sample 1.0.1.

I tried to compile a code of sobel , but I got link issues

undefined reference to vxFReadImageNode' undefined reference tovxFWriteImageNode’

I tried different things, like rebuild openvx from zero … But still the same thing

In the readme file, there is normally nothing to do on linux , a make is enough ? I mean concerning the libraries and include path, is there something to do ?

Thank you in advance