On Tue, 2 Aug 2005, Göran Broström wrote:
On Tue, Aug 02, 2005 at 09:33:45AM +0100, Prof Brian Ripley wrote:
On Tue, 2 Aug 2005, Göran Broström wrote:
[...]
Incidentally, I have just tried building R on a Fujitsu Amilo amd64 with
debian-amd64 (unstable) and ATLAS. Both 'make' and 'make check' worked
without complaints with gcc-3.4.5,
There is no gcc 3.4.5! There are versions 3.3.5 and 3.4.4.
I apologize for the incomplete description; gcc -v gives:
gcc version 3.4.5 20050706 (prerelease) (Debian 3.4.4-5)
but when I tried gcc-4.0.1, 'make check' failed with a segmentation
error after
I have seen this on FC3. Note that ZAXPY is a BLAS routine, and you are
using ATLAS: was that also built with gcc-4.0.1?
Probably not; I just 'apt-get install'ed atlas3-base etc. I'll build atlas
from source and try again.
On FC3 I get the failure
if I use its BLAS, and not if I configure R with --without-blas. (I did
not see the problem using the gcc4 RPM from FC3 update, and I gather
others have managed to use gcc4 from FC4.)
We do not recommend gcc-4.0.x as yet: we have yet to see any performance
gains (only losses) from it, and this is one of a number of known
nuisances. More serious are places where it apparently generates
incorrect code and so gives incorrect answers.
OK. An additional advantage with gfortran(-4.x) will be the possibility to
use fortan95 code, n'est ce pas?
Some Fortran95 code, anyway. (It is not yet a complete implementation.)
The problems we are seeing with gcc4 are mainly (but not
entirely) with gfortran: it seems not quite ready for production use.
-4.0.1 is already a considerable improvement over -4.0.0.
There is another project (www.g95.org) that is using a slightly different
version of these sources, and either g95 or gfortran can be used with
gcc3 if you want to use F95 sources. However, F95 is unlikely to be
suitable for use in distributed R packages for a long time to come.
--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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