After installing emacs 27 and dmd 2.098.0, run:
$ make test
emacs -batch -l test.el
Loading dman (module)...
o o
| \
\ ___ /
|,-oo\\
|| || < Hello Emacs from D!!
|| ||
|| //
||__//
’---
\ \
/ /
^ ^
...Currently, emacs_module.d assumes Emacs 27. To generate it with yours, run:
cp /usr/include/emacs-module.h .
make dman.so
Note that this step requires dpp. To install dpp, see https://github.com/atilaneves/dpp#build-instructions