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mirage, opam and cross-compiling... ?

  • To: Anil Madhavapeddy <anil@xxxxxxxxxx>
  • From: Christopher Greenhalgh <Chris.Greenhalgh@xxxxxxxxxxxxxxxx>
  • Date: Wed, 18 Sep 2013 12:44:06 +0100
  • Accept-language: en-US, en-GB
  • Acceptlanguage: en-US, en-GB
  • Cc: cl-mirage <cl-mirage@xxxxxxxxxxxxxxx>
  • List-id: MirageOS development <cl-mirage.lists.cam.ac.uk>
  • Thread-index: Ac60VtnoLe2usB2iQXCR7AzYaz0mSgADBREw
  • Thread-topic: mirage, opam and cross-compiling... ?

Is there something that passes for best practice when it comes to 
cross-compiling, ocaml and opam? 

I've spent the morning looking but ocaml cross-compiling seems to be rather ad 
hoc at the moment. And the approach I've taken so far following Vouillon with 
separate target-specific opam packages doesn't seem entirely satisfactory...

it would seem "better" to be able to switch to a cross-compiler and build 
standard (or at least cross-compilation-compatible) packages auto-magically. 
And it would be super-nice if this didn't require any changes to "simple" 
packages, which in turn implies that cross-compiling tools are the default and 
the cross-compiler's ocamlbuild is wise to cross-compiling. Other build tools 
(esp. oasis) could then also be extended to turn out sensible defaults when 
cross-compiling (e.g. using BuildTools fields).

I added some notes to the end of my mirage-on-android working notes, 

But I'm wondering if this is already in hand somewhere or better tackled 


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