From ripley@stats.ox.ac.uk  Thu Jul 25 16:32:51 2002
From: ripley@stats.ox.ac.uk (ripley@stats.ox.ac.uk)
Date: Thu, 25 Jul 2002 16:32:51 +0100 (BST)
Subject: Platforms with MSB (Most Significant Byte)
In-Reply-To: <Pine.LNX.4.31.0207251608440.30303-100000@matheron.estadi.uv.es>
Message-ID: <Pine.LNX.4.31.0207251625430.32677-100000@gannet.stats>

R_PLATFORM is used set in etc/Renviron.  You can't find a complete
list, as R can be compiled on new platforms.  In any case, a user could
change the value.

The information you want is in the Rconfig.h header file, in
/* #undef WORDS_BIGENDIAN */
which is uncommented on big-endian systems.

This *is* documented in `Writing R Extensions'.  From R code, look at
.Platform$endian.


On Thu, 25 Jul 2002 virgil@uv.es wrote:

> Hi,
>
> I asked some days ago how to guess the o.s. the machine is running. I
> found that it is stored in a variable called  R_PLATFORM. Now I need a
> full list of  all the values this variable can have because I need to set
> an option  depending on the endianness of the platform in which we are
> compiling the package.
>
>  Anyone can help me? Thanks,
>
>              Virgilio Gmez Rubio
>
> Dpto. Estadstica e I. O. - Facultat de Matemtiques
> Avda. Vicent A. Estells, 1 - 46100 Burjassot
> Valencia - SPAIN
>
> TLF: 00 32 96 386 43 62 - FAX: 00 32 96 398 35 99
>
>
> ---------- Forwarded message ----------
> Date: Wed, 24 Jul 2002 10:24:14 +0200 (CEST)
> From: virgil@uv.es
> To: r-devel@lists.R-project.org
> Subject: Guessing o.s. during installation
>
> Hello,
>
>  I would like to know how R can guess the operating system the machine is
> running during the installation of a package. Besides, if the o.s. is SUN
> I need to add an option to the compiling command (a define).
>
> Regards and thanks,
>
> VIrgilio
>
>
>
>
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-- 
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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Platforms with MSB (Most Significant Byte)
ripley@stats.ox.ac.uk