[Rd] curious package behaviors under cross-build and/or between windows/unix

Prof Brian D Ripley ripley at stats.ox.ac.uk
Wed Apr 18 20:49:26 CEST 2007

On Wed, 18 Apr 2007, Hin-Tak Leung wrote:

> Hi,
> I have gone back to cross-compiling again, and I have come to two
> curious issues: (I have native R under linux x86_64 and win32 R
> under wine) - both 2.4.1:
> (1) for a pure R package (i.e. no compiled code), win32 R would
> happily load the unix version, but the unix version complains
> the cross-built package that it was built for x86 mingw and refuses
> to load it. Is there any reason for the difference?

Yes.  Take a look at the installed DESCRIPTION file, and the Built: line. 
(One reason is line endings: not everything works on Unix (diff, for one) 
with CRLF endings, but everything does work on Windows with LF endings.)

> (2) I get two "arguments in definition changed from (obj) to (object)"
> messages when I do library(XML) on win32 R - but not on native R,

I get it on all platforms with 2.5.0 RC and later (2.4.x is closed), and it 
is a bug in the XML package, AFAICS.

> I know R-devel is not for asking omegahat questions, but
> the message seem to be emitted by R core, so for some reason win32 R is
> behaving differently from native linux R. Again, why the difference
> in behavior?
> Thanks for an ideas.
> Hin-Tak Leung
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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

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