No additional library is necessary.
Here is the procedure to install UNAFOLD from source code:
/home/bioubuntu, decompressed and move this new folder in /opt/bio/sources.root ant its permissions set to 755.% sudo chown -R root:root /opt/bio/sources/unafold-3.7 % sudo chmod 755 /opt/bio/sources/unafold-3.7
unafold-3.7, compilation and installation are easily done:% sudo ./configure && sudo make && sudo make install