Hi Herve, On Dec 12, 2007, at 7:06 PM, Herve Pages wrote:
> Simon Urbanek wrote: > [...] >> >> FWIW: dual 32-bit and 64-bit binaries of current R 2.6.1 patched >> and R- >> devel for Leopard are available from >> http://r.research.att.com/ >> They support all four architectures. To start 64-bit Intel R use R -- >> arch=x86_64, for 64-bit ppc it is R --arch=ppc64. > > We are trying to help some Bioconductor users to use these nightly > builds in 64-bit mode. > > I noticed that when I start them with R --arch=x86_64, > 'sessionInfo()' and 'version' still report i386 (this is with the > latest R-2.6-branch r R-devel builds for Leopard available at > http://r.research.att.com/) > . > Yes - the platform is always i386 or powerpc since Mac OS X identifies as such (there is no 64-bit only Mac OS X). The only reliable way of identifying 32-bit vs 64-bit (on any platform) is .Machine$sizeof.pointer > However, when I try to install and load a Bioconductor binary > package, I do get the same error as reported by Tae-Hoon: > >> library(Biostrings) > Error: package 'Biostrings' is not installed for 'arch=x86_64' > > so it seems that I'm really running R in x86_64 mode (and then the > error I get with library(Biostrings) is perfectly normal since the > BioC universal binaries don't support the x86_64 arch yet). > Yes, you are - see .Platform$r_arch > Also note that when I start R with --arch=ppc, 'sessionInfo()' and > 'version' report the powerpc arch. So why isn't it the case with the > x86_64 arch? > Because Mac OS X on PowerPC identifies itself as powerpc (and there is ppc-only Mac OS X). The same is true for --arch=ppc64. I know that this is confusing, but this is the default. I could force the identifiers to be x86_64 and powerpc64 at build time (mainly because such platforms officially don't exist), but for now I have refrained from doing so. The Leopard 64-bit builds are experimental, so nothing is set in stone yet ... Cheers, Simon _______________________________________________ R-SIG-Mac mailing list R-SIG-Mac@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-mac
