On building from source, the user needs to ensure that the submodule at tpls/rajaperf is populated before building, else the option -DKokkosKernels_ENABLE_TESTS_AND_PERFSUITE=ON causes build to fail.

The top-level CMakeLists.txt does not check if the submodule has been initialized and/or checked out and simply includes the files in the folders tpls/rajaperf and tpls/rajaperf/src.