[Cmake] Making the cmake FindXXX.cmake files more consistent

[Ian Scott]

Sorry Brad,

I hadn't read your original email. Only FOO_PATH_TO_FOO or the minimum
necessary should be in the cache. This is a fine suggestion.

Ian.

> -----Original Message-----
> From: Brad King [mailto:brad.king at kitware.com]

> what its value should be.  For example, if FindFOO is looking for
> libfoo.a, it could have cache entry FOO_PATH_TO_LIBFOO.  Once this has
> been set by the user, the other values can be calculated with relative
> paths.