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c0c64dc105
Various cmake variables that I was informally expecting users to set on the cmake command line (e.g. cmake -DSTRICT=ON, or cmake -DPUZZLES_GTK_VERSION=2) are now labelled explicitly with the CACHE tag, and provided with a documentation string indicating what they're for. One effect of this is that GUI-like interfaces to your cmake build directory, such as ccmake or cmake-gui, will show those variables explicitly to give you a hint that you might want to change them. Another is that when you do change them, cmake will recognise that it needs to redo the rest of its configuration. Previously, if you sat in an existing cmake build directory and did 'cmake -DSTRICT=ON .' followed by 'cmake -DSTRICT=OFF .', nothing would happen, even though you obviously meant it to.