[Rd] Unexpected behaviour of "next line" in gdb

[pleydell at supagro.inra.fr]

Looking through the archives I found this thread
http://tolstoy.newcastle.edu.au/R/e4/devel/08/02/0347.html

and so I tried

MAKEFLAGS="CFLAGS=-g -O" R CMD SHLIB ...

and this worked great.