On Fri, 2 Jul 2010, Jeffrey Horner wrote:
Hi,
Is this sufficient?
Yes, if you want to know in R code.
if (.Machine$sizeof.pointer==4){
cat('32\n')
} else {
cat('64\n')
}
Or is it better to test something in R.version, say os?
Not 'os' (the OS is the same), but 'arch' changes. Just as on a Mac
or on Linux.
I'd like to use this to specify appropriate linker arguments when
building the RMySQL windows package.
If you mean *installing* (R CMD INSTALL, not R CMD build) the
documented way is to use the environment variable R_ARCH: there are
also make variables available, e.g. WIN. See
http://www.stats.ox.ac.uk/~ripley/Win64/W64porting.html (which is
linked from the appropriate manuals).
Jeff
--
http://biostat.mc.vanderbilt.edu/JeffreyHorner
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Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
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