* HOW TO BUILD

step 1. apply build path using 
>> source env.sh

step 2. build libvncserver
>> cd ext_dep/libvncserver
>> mkdir build
>> cd build
>> cmake ..
>> cmake --build .

step 3. copy libvncserver library to root
>> cd ext_dep/libvncserver/build
>> cp -a libvncserver* ../../..

step 4. bulid project with make
>> make clean; make