[CMake] CMake Modules

[Brad King]

frederic heem wrote:
> According to cmake template FindPACKAGE.cmake 
> (http://cmake-modules.googlecode.com/svn/trunk/Templates/FindPACKAGE.cmake)

FYI, this is not an official CMake module repository, nor has a CMake
developer looked at these modules in detail.

> Can someone explain why the include directory is not cached whereas the 
> library is cached and internal:
> 
>   SET(<PACKAGE>_INCLUDE_DIRS ${<PACKAGE>_INCLUDE_DIR})
>   SET(<PACKAGE>_LIBRARIES ${<PACKAGE>_LIBRARY} CACHE INTERNAL "The libraries 
> for <PACKAGE>")

The <PACKAGE>_LIBRARIES should not be cached.  Only the values that
actually might need to be set by the user through ccmake or CMakeSetup
should be cached.

-Brad