[R-pkg-devel] unicode WARNING on solaris?

Hi all,

is there a known fix for this WARNING which I am getting on solaris for my
newly submitted nc package?
https://www.r-project.org/nosvn/R.check/r-patched-solaris-x86/nc-00check.html

A quick google search for "it is not known that wchar_t is Unicode on this
platform cran" shows that many other packages have this WARNING as well.

I searched r-devel and r-pkg-devel for the warning text but I did not find
any messages discussing a fix.

Thanks for any help
Toby