title: With CMake, how to install CSV data file where library can find it?
body: <p>I am working on a C library. It contains a data file, as a CSV file.</p>
  <p>The library opens and read this file as needed.</p>
  <p>But how do I install this file, and open it (in C) in such a way that it works in both testing and after it is installed?</p>
  <p>Right now I copy the file to the build directory so it can be found during testing. But this won't work for an installed library.</p>
  <pre><code># Copy the data file with the NOAA abbreviations.
  configure_file(src/noaa_grib2_params.csv ${CMAKE_CURRENT_BINARY_DIR}/noaa_grib2_params.csv COPYONLY)
  </code></pre>
  <p>Even if I install the data file with the library, how can the library open it? Does the library have to know the install path so it can find the data file?</p>