wcstombs error when compiling package with Debian/Ubuntu

Such errors are common when people use older versions of g++ to write 
their C++ code.  Later versions of g++ have somewhat stricter 
conformance to the C++ standards and catch some lax usage: we've seen 
it quite a lot for g++ 4.4.x and even more for pre-4.5.0.  In all the 
cases I have seen this message indicates a missing header.

wcstombs is a C99 function declared in <stdlib.h>: given that this 
looks like a C++ error message, did you include its C++ version, 
<cstdlib>?

Note that Mac OS X and (32-bit) WinXP are using g++ 4.2.x.  Also, what 
other headers a particular header includes is OS-dependent (and maybe 
even compiler-dependent): we have had a lot of trouble recently with 
<stdint.h> that some OSes (especially MinGW32) include from more 
common headers and some do not.

So this may be an OS issue but a compiler-version issue is more 
likely.

Dear Debian/Ubuntu experts,

For the second time users of my BioC package reported problems when trying to 
compile it on Debian/Ubuntu.

The error is always the same: "'wcstombs' was not declared in this scope", 
see:
https://www.stat.math.ethz.ch/pipermail/bioconductor/2010-February/031739.html
https://stat.ethz.ch/pipermail/bioconductor/2009-August/029192.html

Since I have no problems compiling my package on OpenSUSE11.1, MacOS X and 
WinXP, I assume that maybe some development package may not be installed?

Do you know what might be the reason for the compilation error on 
Debian/Ubuntu?
Which development headers/packages (glibc-headers, glibc-kernheaders??) need 
to be installed on Debian/Ubuntu?

Best regards
Christian
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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