Re: Importing C function with variable argument list

[Ludovic Brenta <ludovic@ludovic-brenta.org>]

Jeffrey Carter writes on comp.lang.ada:
> On 05/13/2012 11:20 AM, Simon Wright wrote:
>> and although it is certainly true that there is nothing in the ARM
>> that says that Integer'Size should be 32 the fact is that *on Mac OS
>> X Lion* it very definitely is.
>>
>> Also on Debian 6 amd64.
>>
>> Now, the size of an 'access Integer' is 64 on both.
>
> No, they're not.
>
> Those may be the values for a specific compiler on those platforms,
> but a specific compiler is not Ada.

The way I understood Simon, he *was* talking about specific compilers on
specific platforms.  By "Ada" he really meant "the Ada front-end of
GCC".

> Nothing stops another compiler for those platforms from using other
> values.

Yes, the ABI does.  Granted, a compiler may choose not to obey the ABI
but then programs compiled with it will not be able to load any shared
libraries not compiled with the same compiler.  So, not obeying the ABI
of the target platform would be really stupid.

-- 
Ludovic Brenta.