[Rd] Force action in package install?

[Duncan Murdoch]

I'd like to substitute the Subversion revision number for a string in a 
package man page every time the package is installed or built.  I can 
assume it is being installed or built from a Subversion working copy.

I tried putting a target that depends on FORCE into Makefile or Makevars 
in the src directory, but it is not being built.  What sort of make 
magic do I need, and where do I put it in order to get R CMD INSTALL to 
run my code?

Duncan Murdoch