https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82215
--- Comment #2 from Lee Busby <busby1 at llnl dot gov> --- (In reply to kargl from comment #1) > It sound like you are looking for Fortran 2008's SUBMODULE feature. > See for example > > https://software.intel.com/en-us/blogs/2015/07/07/doctor-fortran-in-we-all- > live-in-a-yellow-submodule Thank you for the comment. I had previously read Mr. Lionel's description of submodules, and I read it again just now. I do think that submodules, in principle, address many, possibly even all, the problems that I describe in my attached report. In practice, however, we're not going to rewrite 45,000 lines of existing code in order to find out. As I understand them, submodules would allow you to, by hand, put all the interfaces into compilation units that could effectively be processed without object code generation. If so, those compilation units would presumably compile quickly, like the first pass in the two pass method. Then, presumably, all the compilation units that *do* require object code generation can be processed in parallel, because all their dependencies are present. That's what the two pass approach does for us now, without any code rewriting. I do understand why SUBMODULE was added to the standard, and I fully support it. It's really not a feasible path for our project, however. So I hope you'll consider the feature request. Maybe I fail to understand the issues, but it does not seem like a huge change to the already-existing set of compiler options and capabilities. Thank you.
