R devel - Sep 2009 - Unexpected behaviour of "next line" in gdb

I compile some C code using

R CMD SHLIB buggyCode.c --ggdb --O0

I thought the -O0 flag would avoid gdb ~ optimisation problems. But each time I
step through the code in gdb using "n" (next line) the executed line
order is
not as expected ("looks" more like a random walk around the expected
next
line). So to me it looks like there is still a gdb ~ optimisation conflict.

Does this mean I have to have a copy of R compiled from source using the -O0
flag too?

thanks
David


-- 
David Pleydell
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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.