libssh's functions couldn't be found on qt

问题

I have cloned libssh library and built it with cmake. Building process was like this :

git clone https://git.libssh.org/projects/libssh.git/
mkdir build in libssh directory.
cd build   
cmake -DUNIT_TESTING=ON -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Debug ..
after this line i got this error about cmocka:
Could NOT find CMocka (missing: CMOCKA_LIBRARIES CMOCKA_INCLUDE_DIR)
then : rm CMakeCache.txt 
cmake ..
make 
sudo make install

Now I want to use this library on qt but I have some issues there.

I got errors like :

error: undefined reference to `ssh_session_is_known_server'

I can't use any of function or structures on this library. My OS is ubuntu 18.04.

来源：https://stackoverflow.com/questions/62858346/libsshs-functions-couldnt-be-found-on-qt