Successfully installed libpeerlib.a file in linux but don't know how to use it in R

my command on linux is below,

git clone https://github.com/PMBio/peer.git peer
cd peer
mkdir build
cd build
cmake ./.. 
make
sudo make install

The last command returns "install to /usr/local/lib/libpeerlib.a". This seems to be a static library coded in C?