[Rd] R-devel has zlib updated to 1.2.1

[Prof Brian Ripley]

and so you will probably need to

(cd src/extra/zlib; make distclean)
./configure

after updating the sources, as some files have been removed that appear 
as dependencies.

-- 
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