Desired Behavior

Per my discussion with @rgrinberg on Discord earlier, as of now in order to include an object file in compilation, it first needs to be embedded in a .a file with ar.

My thought was to add a (foreign_objects <foreign-objects-list>) field that behaves the same way as (foreign_archives <foreign-archives-list>), except with .o files.

Example

dune:

(library
 (name mylib)
 (foreign_objects myobject.o))

(rule
 (targets myobject.o)
 (action ...))