tried the above links, however, the final command (ln -s /usr/lib/libfl.so.2.0.0 /usr/lib/x86_64-linux-gnu/libfl.so.2) failed... tried to build & it failed
unlinked /usr/lib/x86_64-linux-gnu/libfl.so.2, did some yard work came back to a successful build!!!
wheww, thanks! so, in the future how...