[CMake] RPATH_CHECK and make install

[Clifford Yapp]

I've got rather an odd problem, and I'm not even sure how to start
debugging it.  I am building a library and exec files with CMake, and
the build appears to succeed.  But when I run make install, the files
are gone - erased.

I've traced it as far as a FILE(RPATH_CHECK ...) test in the install
script, but it's not clear to me what's going wrong to make
RPATH_CHECK unhappy or how to fix it.  Can anyone give guidance on how
to approach this?

Cheers, and thanks!

CY