There is nothing particularly different when it comes to binding C functions vs
macros in nim - in the end it is just a codegen.
Though as you mentioned in your comment this can be extremely unreliable due to
codegen **and** C macros in the same place - stray comma can completely mess up
everything.
{.emit: """
#define hell(arg) puts(arg)
""".}
proc hell(arg: cstring) {.importc: "hell", header: "stdio.h".}
let str = "123123"
hell(str.cstring)
Run
PS: I also tried using `.importcpp.` (because it has more feature-full syntax
for describing codegen patterns), but it seems like this is not possible
(linker error).
