CMake Config forces launch_compiler

[rbberger]

Projects that use Kokkos and KokkosKernels can't disable the Kokkos launch_compiler via COMPONENTS separable_compilation. KokkosKernels always forces the use of launch_compiler.

find_package(Kokkos COMPONENTS separable_compilation)
find_package(KokkosKernels)

still leads to the global launch_compiler rule to get activated due to find_dependency(Kokkos) in the KokkosKernels Config module.

[JBludau]

separable compilation is not working as expected in kokkos core. We are currently working on it, for starters see kokkos/kokkos#7525.
Will take a look at KokkosKernels as soon as it is fixed in core.