[RFC] Link time code generation #594
Description
It'd be nice to support special libraries whose implementation would be generated at link time. Here are several uses cases:
Build info
module Dune_build_info : sig
(** If inside git, this is the output of [git describe ...] *)
val vcs_head : string option
(** Project version *)
val version : string
(** For things that dynamically load libraries *)
val linked_in_libraries : string list
endOcaml config
This could be used for all configurator scripts:
module Dune_ocaml_config : sig
val version : int * int * int
val standard_library : string
...
endall you'd have to do is add dune.ocaml_config in the libraries field and we'd get this library with the values instantiated with the current build context configuration.