Nada. The result of git pull is that it is already up to date and sudo make install stops with the exact same error message I posted previously.
Still stumped. Do you think I should  erase all traces of latest files and downloaded tarball and simply start from scratch. I'm willing to try, but not certain it is necessary.
Seems like I should be able to locate the source of the stumbling block, and move forward, but it is a mystery as to what the problem is. I already went through the list of
dependencies and feel pretty sure I have all the ducks in a row... still no quack! I sincerely appreciate all your help though. If you are not already, you should be working for customer service
at some big time exchange and making about five times whatever your current pay rate is. Just a thought.