This needs to be known so that C++ module properties for the install can be staged beside the other files. Always perform the MD5 transformation (in non-bootstrap builds) so that the path can be computed prior to generation (where it used the longest configuration name to detect too-long paths). Update tests to expect the always-present MD5 value. Note that this improves robustness of the test suite as testing in a too-long path may have triggered the MD5 conversion anyways.