Re: [Caml-list] <DKIM> Application crashing when build with cross-compiler

[Adrien Nader <adrien@notk.org>]

On Wed, Oct 14, 2015, Stefan Hellermann wrote:
> I tried to reproduce this on a x86_32 cross-compiled target, but failed. I
> tried to create exactly the same environment for x86_32, same libc, same
> compiler, same kernel. Only difference to compiling for my target is
> endianess, mips is big endian and x86_32 is little endian.
> 
> Should I try to descripe how to setup Qemu for an mips target and build
> OCaml and unison with a cross-compiler?
> 
> Is there anything else I can try? Can someone point me to a few test
> scripts which I could run on the mips target and see if something fails?

Hmmmm, endianess is indeed likely to cause troubles.

Do the cross-build from x86_64 to ix86  (or the other way round) and
look for warnings from as (need the end of the build iirc). It will
point you to lines that result from assumptions about word size and,
quite likely, endianness. I have no idea if they will be the ones that
cause you troubles but they're worth checking I believe.

Unfortunately I don't know the code emission well enough to be more
precise about its requirements.

As for the qemu approach, it's something not to neglect because it's
easy to setup and gives results.

-- 
Adrien Nader