José Matos
2011-Feb-01 08:46 UTC
[R-sig-Fedora] Fwd: [Rd] Warning: you may need to use R-patched with recent R distros
Hi, I noted this message yesterday in R-devel. I think it would sensible to package a patched version while 2.12.2 is not delivered. ---------- Forwarded Message ---------- Subject: [Rd] Warning: you may need to use R-patched with recent R distros Date: Monday 31 January 2011, 19:48:33 From: Prof Brian Ripley <ripley at stats.ox.ac.uk> To: R-devel at r-project.org Two things have emerged in testing on x86_64 Fedora 14 which mean that a recent R-patched is probably needed. 1) That OS uses zlib 1.2.5: that claims to be binary-compatible with zlib 1.2.3 but is not, as we found (painfully) on Windows. The remedy was to remap _all_ the symbols in R's own copy of zlib (not just those zlib arranged to remap). The symptoms were crashes using packages XML and rgoobi (both of which link to zlib) and incorrect results in RJaCGH (which contains a copy of zlib). There may well be other problems .... 2) Fedora 14 uses gcc 4.5.1. With CFLAGS containing the default -O2 or higher, HAVE_C99_COMPLEX was detected as false because there is a (genuine) incompatibility between types Rcomplex and C99's double complex. This means that R's fallback code is used, and regretably that contains a serious bug in an 'optimization' by a colleague, so z^n is incorrect for most complex z and integer n (and has been since 2.10.0). The remedy is to use R-patched or R-devel, or only optimize to -O. We've also seen incorrect results from package mvtnorm when C optimization was -O3. The upshot is that there is likely to be a 2.12.2 to fix these issues. -- Brian D. Ripley, ripley at 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 ______________________________________________ R-devel at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel ----------------------------------------- -- Jos? Ab?lio