This is a simple CMake project shows how to have a default raw CMake build
system and secondary TriBITS build system sit side-by-side.

To configure this, you just create a build dir as:

$ cd $SOME_BASE_DIR
$ mkdir BUILD
$ cd BUILD

and then configure, build, and test with the raw CMake build system, use:

$ cmake $TRIBITS_DIR/doc/example/RawAndTribitsHelloWorld
$ make
$ ctest

To configure, build, and test with the TriBITS CMake build system, use:

$ cmake \
   -DRawAndTribitsHelloWorld_TRIBITS_DIR=${TRIBITS_DIR} \
   $TRIBITS_DIR/doc/example/RawAndTribitsHelloWorld
$ make
$ ctest