[Rd] compile 2.4.1 for linux on power cpus

[Andrew Ferris]

Peter,

First off, as you may have guessed, I don't compile many 64 bit programs so thanks again for the help. I'll revert back to powerpc64-unknown-linux-gnu which is the default for -build and -host.

Here's the gcc information
[hostname]:/ # which gcc
/usr/bin/gcc
[hostname]:/ # gcc -dumpmachine
powerpc64-suse-linux

>From looking at the GNU documentation for GCC  - IBM RS/6000 and PowerPC Options, I see that it mentions this option:

-m64
    
Generate code for 32-bit or 64-bit environments of Darwin and SVR4 targets (including GNU/Linux). The 32-bit environment sets int, long and pointer to 32 bits and generates code that runs on any PowerPC variant. The 64-bit environment sets int to 32 bits and long and pointer to 64 bits, and generates code for PowerPC64, as for -mpowerpc64. 

So would some compiler flags such as these work:

'CC=gcc -m64' 'CXX=g++ -m64' 'FC=gfortran -mc64' 'F77=gfortran -m64' 'LDFLAGS=-L/lib64'



Andrew Ferris
Network Support Analyst
iCAPTURE Research Centre
University of British Columbia

>>> Peter Dalgaard <p.dalgaard at biostat.ku.dk> 03/14/07 5:03 PM >>>
Andrew Ferris wrote:
> Thank you for the reply Peter. 
>
> I've compiled R from source using the following:
>
> ./configure --host=powerpc64-power5-linux-gnu --build=powerpc64-power5-linux-gnu '--with-blas=-framework blas-3.1.0-11'
>
> and after I've made R I get this:
>
>   
>> .Machine$sizeof.pointer
>>     
> [1] 4
>
> meanwhile uname -a prints out this:
>
> Linux [hostname] 2.6.16.21-0.8-ppc64 #1 SMP Mon Jul 3 18:25:39 UTC 2006 ppc64 ppc64 ppc64 GNU/Linux
>
>   
So I was wrong in assuming that 64 bit SLES would be set up for 64 bit 
compiles.....

> and in the root filesystem there's a /lib and /lib64. I suspect that R needs to have the 64 bit libraries specified so is there a way to do that?
First check the toolchain:

which gcc
gcc -dumpmachine

You might need to revise your path and/or install 64 bit versions of the 
compilers.

Actually, looking at the package list for SLES 10, I see that some 
packages have a -64bit variant, e.g.

glibc-64bit 2.4 
<http://www.novell.com/products/linuxpackages/server10/ppc/glibc-64bit.html> 
(Standard Shared Libraries (from the GNU C Library))
glibc-devel-64bit 2.4 
<http://www.novell.com/products/linuxpackages/server10/ppc/glibc-devel-64bit.html> 
(Include Files and Libraries Mandatory for Development)

but the gcc package does not, and the gcc-fortran-64bit 4.1.0 
<http://www.novell.com/products/linuxpackages/server10/ppc/gcc-fortran-64bit.html> 
packages contains only libraries. So my guess is that there is one 
compiler that does both 32 bit and 64 bit compiling, but you need to set 
a compiler flag for the latter.

I don't think messing with --build and --host is likely to do any good.



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