[Rd] suggested package not found

[Tim Bergsma]

I normally work in Windows, but make my packages under Unix.  My package 
'b' suggests my package 'a'.  R CMD check fails for 'b', even though 'a' 
is installed: "Packages required but not available: b".  What do I have 
to do to make 'a' available, besides R CMD INSTALL 'a'?  I'm not 
spotting the answer in "Writing Extensions...".  Please point me in the 
right direction.

Thanks in advance,

Tim.