The directory with the CMakeCache.txt file.
This is the full path to the directory that has the CMakeCache.txt file in it. This is the same as CMAKE_BINARY_DIR.
© 2000–2016 Kitware, Inc.
© 2000–2011 Insight Software Consortium
Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.5/variable/CMAKE_CACHEFILE_DIR.html