[vtkusers] ccmake not producing correct Makefile for Examples.

[Dongbai Guo]

I would like to build all examples under ${VTK_SRC}/Examples.

I turned BUILD_EXAMPLES  to "ON"
but the make files produced in
${VTK_BUILD}/Examples does not contain a single rule to
build a ".o" file or an executable.

Anybody knows how to enforce ccmake to generate the correct
make file for Examples in the build dir?

thx
dongbai