It is being worked on (at the build system level). Even so, I don't think Linux would support modules because it'd require some…unfortunate behaviors to support in `make`, namely at least one recursive make level.
Though if `gmake` is assumed, there is `libcody` support that's in a patch that can do it without recursive `make` at the expense of having an unknown number of outstanding compilation processes open waiting to figure out what their topological order is at build time. I do not know what the behavior of such a solution is in the presence of import cycles or unsatisfied imports, but that's also why I prefer the "scanning" solution.
FD: CMake developer working on C++ modules support.
Though if `gmake` is assumed, there is `libcody` support that's in a patch that can do it without recursive `make` at the expense of having an unknown number of outstanding compilation processes open waiting to figure out what their topological order is at build time. I do not know what the behavior of such a solution is in the presence of import cycles or unsatisfied imports, but that's also why I prefer the "scanning" solution.
FD: CMake developer working on C++ modules support.