Re: [R] Rgdal windows binary warning message

From: Prof Brian Ripley <ripley_at_stats.ox.ac.uk>
Date: Tue 02 Aug 2005 - 16:38:54 EST

This is a consequence of how VC++ compiled gdal. R is protecting itself against that. Since R did not crash, there is nothing to worry about.

On Tue, 2 Aug 2005, Tony Gill wrote:

> Hi all,
>
> I just downloaded windows binaries of RGDAL (from
> http://www.stats.ox.ac.uk/pub/RWin/bin/windows/contrib/2.1/) and installed.
>
> I ran the example R_HOME\library\rgdal\R-ex\getPixmapGDAL.R and everything
> seemed to work as expected. However I got the following warning message:
>
> DLL attempted to change FPU control word from 8001f to 9001f
>
> The R-help (?dyn.load) describes the problem as:
>
> ************************************
> External code must not change the floating point control word, but
> many DLLs do so. Common changes are to set it to use 53 bit
> precision instead of R's default 64 bit precision, or to unmask
> some exceptions. 'dyn.load' detects such changes, and restores
> R's control word to its default value of hex 8001F. This may
> cause the DLL to malfunction; if so, it should be rewritten to
> save and restore the control word itself. If 'warn.FPU' is set to
> 'TRUE' using the 'options' function, a warning will be printed.
> (If the warning says that the control word was changed from some
> other value than 8001F, please report the circumstances to the
> Windows maintainers: that probably indicates an internal bug.)
>
> ************************************
>
> Does anyone know if this is a major problem for reading and manipulating
> image files using RDAL? And if so are there windows binaries which have
> patched it up?
>
> Thanks in advance
>
> Tony
>
> ******************************************
> Tony Gill - PhD Candidate
> Centre for Remote Sensing & Spatial Information Science
> School of Geography, Planning & Architecture
> University of Queensland
> Brisbane, Queensland, AUSTRALIA, 4072
> Ph: 61-7-3365-7027
> email: t.gill1@uq.edu.au
>
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>
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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 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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Received on Tue Aug 02 16:45:41 2005

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