[R] Rgdal windows binary warning message

From: Tony Gill <t.gill1_at_uq.edu.au>
Date: Tue 02 Aug 2005 - 09:53:17 EST

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 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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