linux compile options (64-bit)
On Tue, Aug 02, 2005 at 09:33:45AM +0100, Prof Brian Ripley wrote:
On Tue, 2 Aug 2005, G??ran Brostr??m 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? G??ran