[CMake] How to FORCE an OPTION?

[Marcel Loose]

Hi all,

Is there a way to FORCE an OPTION, other than using

  set(VAR <value> CACHE BOOL "docstring" FORCE)

The reason I'm asking is that I'm using two files that preset a number
of CMake options. The first contains generic settings; the second,
host-specific, may override these generic settings. 

Since these files can be modified by end-users (i.e. software developers
not necessarily proficient with CMake) I would like to keep the syntax
as easy as possible. 

Something like

  option(VAR [docstring] <value> FORCE)

would be nice.

Best regards,
Marcel Loose.