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From: Lars Poulsen <lars@beagle-ears.com>
Newsgroups: comp.os.linux.misc,alt.folklore.computers
Subject: Re: The joy of FORTRAN
Date: Thu, 26 Sep 2024 18:01:25 -0700
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On 26/09/2024 13:43, Lawrence D'Oliveiro wrote:
> On Thu, 26 Sep 2024 11:49:37 +0100, Pancho wrote:
> 
>> On 9/26/24 11:10, Lawrence D'Oliveiro wrote:
>>>
>>> On Thu, 26 Sep 2024 08:42:32 +0100, Pancho wrote:
>>>
>>>> ... a bitch to work out how to call Vax C from Vax Pascal, or vice
>>>> versa.
>>>
>>> Why would it be that hard? VAX C passed everything by value, while
>>> Pascal let you specify descriptors, references, immediate value ... all
>>> the options.
>>
>> There ware decisions to be made, like what order do you push variables
>> onto the stack, when do you push the return address, how to interpret a
>> Pascal String in C.
> 
> All these things were standardized in the VAX/VMS ABI, right from the
> beginning.

IIRC, VAX C did not completely follow the standard calling conventions, 
which created some issues in mixed-language applications.