Agreed, the compiler can compile binaries for multiple architectures
(we use that all the time). On that same website ( http://
r.research.att.com/ ):
"Building universal R is done by compliling two R binaries and
setting r_arch parameter to ppc and i386 respectively, along with the
proper compiler flags. Those two builds can then be installed into
the same framework location, R install process merges them
correspondingly."
The issue is in the link step not the compile phase.
Rob
On Jun 1, 2007, at 6:05 PM, Robert Kern wrote:
Christopher Barker wrote:
Rob J Goedman wrote:
Hope this helps a bit,
not much, but I don't need to get how R works.
It seems there is still no Fortran compiler for OS-X that build
universal binary libs -- too bad.
The gfortran binary that Paul pointed you to does make Universal
binaries. I
don't know why you think it doesn't. If you want an explicit
statement to that
effect:
http://r.research.att.com/tools/
If you want a demonstration:
[fitpack]$ gfortran -arch i386 -arch ppc -c bispev.f
[fitpack]$ file bispev.o
bispev.o: Mach-O universal binary with 2 architectures
bispev.o (for architecture i386): Mach-O object i386
bispev.o (for architecture ppc):Mach-O object ppc
--
Robert Kern
"I have come to believe that the whole world is an enigma, a
harmless enigma
that is made terrible by our own mad attempt to interpret it as
though it had
an underlying truth."
-- Umberto Eco
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On Jun 1, 2007, at 3:10 PM, Rob J Goedman wrote:
I don't think that is implied on Simon's R website. The context of
the statement is building universal
packages for the R statistical software system.
Within that context the compiler inter-works with the latest set of
Xcode tools to build a package (if the
package includes Fortran in addition to C/C++). These packages are
then installed in R's library and after
loading into R, methods in the package can be called from R. I
think it is the install step of both packages
and R/R.app that makes sure the matching architecture is chosen.
Most packages are available in binary, universal form (and include
both binaries), but installing a package
from source will pass the correct architecture flag.
Hope this helps a bit,
Rob
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