From ripley@stats.ox.ac.uk  Fri Jun  1 20:31:50 2001
From: ripley@stats.ox.ac.uk (Prof Brian D Ripley)
Date: Fri, 1 Jun 2001 20:31:50 +0100 (BST)
Subject: [Rd] What is the logic behind sys-common, sys-unix et.al. ?
In-Reply-To: <3b17f4a4.thoffman.zappa@zappa.sax.de>
Message-ID: <Pine.GSO.4.31.0106012026220.5279-100000@auk.stats>

On Fri, 1 Jun 2001, Thomas Hoffmann wrote:

> I try to understand how the system specifics are organised in R.
>
> My understanding was that (citing system.txt):
>
>  *	sys-common.c  has code common to the unix/gnome/gnuwin32 ports
>  *	sys-unix.c    has code common to the unix/gnome ports
>  *	system.c      has interface-specific code
>
> But now I see that unix/sys-common contains unix and Win32 specific code which is selected via
> #ifdefs.
>
> Another question is who carries the sys-common file? If it is "common", why does a specific
> system subdir (unix, that is) carry this file?
>
> I know that there are historical reasons for that, but is there a "plan" for reorganising this stuff, now
> that there is at least a third class of systems (macintosh) involved?

Why change what works?

> Another question is: Should the graphics interfaces be connected to the systems in a 1:1 fashion?
> I have a test build of R-1.2.3 for OS/2 an my hard disk which is able to use a Presentation Manager
> and a X11 graphics device: X11 is a 1:1 copy of the unix/X11 files. (And I assume "that new Macs" I
> do not know anything about can display X11, too. And for Win32 exist X11 servers ...)

We do not support X11 on Windows, even though it can be built.

-- 
Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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[Rd] What is the logic behind sys-common, sys-unix et.al. ?
Prof Brian D Ripley