Linux build fails

[Stephen Hemminger]

I am no Qt expert, maybe installing the upstream version in /var/src/Qt has
bolluxed up the standard Debian version?

-- out of source build from source in /home/shemminger/build/subsurface
CMake Error at /usr/lib/x86_64-linux-gnu/cmake/Qt5/Qt5Config.cmake:26 (find_package):
  Could not find a package configuration file provided by "Qt5Location" with
  any of the following names:

    Qt5LocationConfig.cmake
    qt5location-config.cmake

  Add the installation prefix of "Qt5Location" to CMAKE_PREFIX_PATH or set
  "Qt5Location_DIR" to a directory containing one of the above files.  If
  "Qt5Location" provides a separate development package or SDK, be sure it
  has been installed.
Call Stack (most recent call first):
  CMakeLists.txt:221 (find_package)


-- Configuring incomplete, errors occurred!
See also "/home/shemminger/build/subsurface/build/CMakeFiles/CMakeOutput.log".
make: *** No targets specified and no makefile found.  Stop.