[R] R package with C code on Windows

[S. Blay]

Dear R helpers,

MyPkg passes R CMD check on Linux machines.
However, when I 'R CMD check myPkg' on Windows,
the libs subdirectory is not being created.

If I install the package and then create the libs 
subdirectory manually and copy the dll files to it, 
the package seems to work fine 
(but that's not good enough for submitting it to CRAN).

Any advice will be appreciated, 

Thanks,

Sigal