Is there a way to call dmd/rdmd on a set of files but only
activate unittest for one of them?
This would significantly cut down my wait times when developing D
in Emacs with flycheck-d-unittest:
https://github.com/flycheck/flycheck-d-unittest
Without it I have to implement my own build logic:
1. dmd -c -unittest -main <top.d>
2. dmd -c -unittest -main <sub1.d sub2.d, ... subN.d>
3. ld.gold -o test top.o sub1.o sub2.o ... subN.d
when top.d depends (either directly or transitively) on
sub{1,...,N}.d
Further, building 1. and 2. separately wastes CPU-cycles through
duplicate parsing of sub{1,...,N}.d.
