On Dec 7, 2011, at 9:07 AM, Adam Strzelecki wrote:
Hello R Community,
I have recently started using R for my PhD work. Aside of that I am
Mac and iOS developer since few years. As far I can see R package
for Mac comes in two flavors, R (32-bit) and R64 (64-bit).
Most of them build as universal unless you do the make/compile stuff
on your own. The compile object code gets put in the .../pckgname/
libs/ directory and mine have x86_64, ppc, and i386 subdirectories.
http://r.research.att.com/
Correct [me] if I am wrong, but the only reason of such separation
(rather doing single universal version for all PPC, i386 and x86_64)
is Carbon dependency for various R packages? So 32-bit version is
the one that uses native Quartz or OpenGL rendering, while 64-bit
version is the one that can drive over 2GB of memory but falls back
to X11 as Carbon isn't available for 64-bit.
Can anyone tell me what are the packages that still relay on Carbon
(quartz renderer, rgl? anything else) that would need to be ported
to Cocoa so 64-bit version will offer full functionality as 32-bit
counterparts on Mac, instead of falling back to X11? I guess I could
help quickly porting these parts into Cocoa, so we got single (3
architecture) binary.
I am running 64 bit Mac almost exclusively with the Mac GUI, and X11
is only loaded for a few packages that rely on its windowing
(typically ones that rely on TcL/Tk). I believe the 32 bit version
addresses whatever portion of 4 GB is not occupied by system or other
programs (not 2 GB) and would be faster and more memory efficient if
were used on a machine with memory limited to 4 GB. There are two
GUIs, one 32 bit and one 64 bit and they both use Quartz. I'm
reasonably sure the Tcl/Tk dependency on X11 is cross-architecture.
Cheers,
--
Adam Strzelecki | nanoant.com
BTW. Who's the Mac package maintainer in R project?
Simon Urbanek.
He reads this list regularly and will be by to correct my errors.
--
David Winsemius, MD
West Hartford, CT
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