[CMake] is ccmake reliable?

[Tyler Roscoe]

On Tue, Sep 15, 2009 at 02:08:44PM -0600, James C. Sutherland wrote:
> So assuming that I wanted my CMakeLists.txt file to modify the default  
> install location, but allow the user to change this, wouldn't I do  
> something like:
> >set( CMAKE_INSTALL_PREFIX
> > ${CMAKE_CURRENT_BINARY_DIR}
> > CACHE PATH "installation path"
> > )
> This doesn't work - I assume that this is because CMAKE_INSTALL_PREFIX  
> is a special (internally defined) variable?  When I run ccmake and  
> configure, the value remains as /usr/local.

This will work when generating a new cache. If you have a pre-existing
cache, CMake won't override the value in there (otherwise how could a
user ever provide her own values for cache variables).

You can use FORCE to overcome this, but it usually isn't what you want.

tyler