[Rd] Tests of gcc-4.0.1

From: Prof Brian Ripley <ripley_at_stats.ox.ac.uk>
Date: Fri 05 Aug 2005 - 20:01:02 GMT

I had promised to report on tests of gcc-4.0.1, and have now tracked down all the outstanding issues.

I am comparing gcc3 (gcc-3.4.4 including g77) and gcc4 (gcc-4.0.1 including gfortran) on FC3, both i686 and x86_64 (the latter both 64-bit and 32-bit builds). All compiled from the sources (the FC3 update to 3.4.4 was not out when I started this).

The bottom line is that 4.0.1 shows none of the serious errors that 4.0.0 showed, but was always slower (usually 4-10% slower) than gcc3 and (see below) about 25 CRAN packages fail only about half of which are attributable to deficiences in the packages.

The differences between the outputs has shown some places where R is more sensitive to rounding errors than might have been thought. Amongst these are

Amongst CRAN packages:

RSvgDevice is said to have invalid C

acepack, deldir, fMultivar, fOptions, fSeries, frailtypack, gap, gcmrec, hmm.discnp, labdsv, survrec

have invalid Fortran. (Most of these have been reported to the maintainers some time ago.)

Geneland infinite loops
NISTnls, gss, relsurv fail their tests
SparseM, asypow, mvtnorm, party, subselect segfault ade4 has an LAPACK error (similar to those seen before)

Brian D. Ripley,                  ripley@stats.ox.ac.uk
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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Received on Sat Aug 06 06:05:54 2005

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