I first want to say a big Thank You to Ken Koster (N7IPB) for his suggestions. They were the key to getting it to compile.

After the installing various libs like libncurses-dev, libusb-dev,libssl-dev and libcrypto++-dev to eliminate dependency errors; needed to install the g++-4.9 compiler (actually version 4.9.3). The standard compiler is gcc (version 6.3.0). Both are installed; but I need to make it use g++-4.9 by specifying it with ./configure CXX=g++-4.9 CC=gcc-4.9. Initially that wasn’t working until I did a make clean (to remove previous compile object file errors). Then I  re-ran ./configure CXX=g++-4.9 CC=gcc-4.9, followed by make. That worked! Then make install.

‘Hope this helps others fighting the same problem.

Tom / K5TRA