[FreeVMS] Re: Optional trailing arguments to system-services


Subject: [FreeVMS] Re: Optional trailing arguments to system-services
From: Brian Peacock (halfelven@highstream.com)
Date: Sun Dec 28 2003 - 17:30:42 CET


Is the plan to implement the VMS calling standards as described in the
OpenVMS documentation suite? This answers (I think) all the questions
regarding optional/missing arguments and the usage of the various
descriptors. I have to refer to this all the time when sorting out mixed
language programs (C and C++ being very much a pain in this respect).

Regards

Brian

> Hi,

> One of the staples of the VMS system-services and run-time-library
routines
> is optional arguments. I am almost positive they were the trailing
arguments
> ... since the argument-count in the call-frame was used to determine if
the
> arguments were passed or not.

> Is this supported in FreeVMS; and if so ... is it being done with the C
> varargs interface? Or ... how is this being accomplished?

> -Jay

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