I downloaded the .gz file from https://sourceforge.net/projects/gphoto/files/ (libgphoto2-2.5.16.tar.bz2), uncompressed it, un-tarred it.
Then from the command line, I ran
autoreconf --install —symlink ./configure make sudo make install
There were no obvious errors, and if I go to
/usr/local/lib I see relevant files. But I don't see the gphoto2 binary anywhere and trying to run gphoto2 results only in "command not found".
I am open to any suggestions.