Make CMake ExternalProject not check out submodule for ACTS
CMake's ExternalProject by default will do a recursive clone. This can be suppressed by specifying GIT_SUBMODULES=""
and setting CMP0097
to NEW
. Since this submodule is not needed at all, I would think it's a good idea to simply not bother cloning it at all.
@akraszna, do you have an opinion on this?