From: Florian Weimer <fw@deneb.enyo.de>
To: Adrien <camaradetux@gmail.com>
Cc: Caml Mailing List <caml-list@yquem.inria.fr>
Subject: Re: [Caml-list] Binding C libraries which use variable arguments (stdarg.h)
Date: Sun, 01 Nov 2009 13:16:28 +0100 [thread overview]
Message-ID: <87r5sil9sz.fsf@mid.deneb.enyo.de> (raw)
In-Reply-To: <666572260911010412n3f60bb21pc6e1d3bb70279f58@mail.gmail.com> (Adrien's message of "Sun, 1 Nov 2009 13:12:33 +0100")
* Adrien:
> On 01/11/2009, Florian Weimer <fw@deneb.enyo.de> wrote:
>> * Adrien:
>>
>>> It turned out it worked on linux x86_32, linux x86_64, netbsd sparc64
>>> with 32-bit userland, debian's kfreebsd amd64 and ppc32. There's
>>> windows which I haven't checked yet though.
>>
>> x86_64 has different calling conventions for varargs and non-varargs
>> functions. If it works for you, it's only by accident (e.g. because
>> you aren't passing floating-point arguments).
>>
>
> I tried a few things with "double" at first since I'm on x86_64 and
> got no warning and no problem whatsoever.
Could you check if libffi sets the %rax register to the number of
floating-point arguments? (I've seen this working by mere chance in
many cases.)
next prev parent reply other threads:[~2009-11-01 12:16 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-28 22:07 Adrien
2009-10-28 22:45 ` Basile STARYNKEVITCH
2009-10-29 8:55 ` Goswin von Brederlow
2009-10-29 21:37 ` Adrien
2009-10-29 23:31 ` Goswin von Brederlow
2009-10-29 21:18 ` Adrien
2009-10-30 9:35 ` Xavier Leroy
2009-11-01 9:31 ` Adrien
2009-11-01 11:07 ` Florian Weimer
2009-11-01 12:12 ` Adrien
2009-11-01 12:16 ` Florian Weimer [this message]
2009-11-01 14:58 ` Adrien
2009-11-01 20:06 ` Richard Jones
2009-11-03 19:33 ` Florian Weimer
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