[R] rq matrix decomposition

[Mads Jeppe Tarp-Johansen]

I specifically need rq matrix decomposition (and not qr).

Looking at netlib site for LAPACK it does provide rq whereas LINPACK not. 
Looking at companion qr in R I see how in base it wraps with a .Call but I 
do not have success in doing that for a similar .Call for rq.

Anyone done this or can provide matrix rewrites that allow me to do the rq 
decomposition with existing R funcs?

Regards MJ