[R] passing arguments to R CMD SHLIB

[Prof Brian D Ripley]

On Tue, 13 Mar 2001, Faheem Mitha wrote:

>
>
> On Tue, 13 Mar 2001, Prof Brian D Ripley wrote:
>
> > On Tue, 13 Mar 2001, Faheem Mitha wrote:
>
> > > it doesn't look like the arguments -O2 and -Wall get passed down. Is there
> > > some reason for this? I certainly would like error checking to be turned
> > > on as much as possible.
> >
> > Well, no one said they would be!  If you want to alter flags, they are
> > set as CFLAGS R_HOME/etc/Makeconf or Makevars. I have -O2 -Wall -pedantic.
> > I don't think you need -lm as R is linked against that.
>
> Is it possible to set CFLAGS at the user level? I am usually not terribly
> keen to alter system config files (Makeconf in this case). For one thing,
> I don't always have root access on the systems I use, and for another I
> tend to lose my changes when I upgrade.

I did say so: use a file Makevars. You can only add that way. If you do

cat > Makevars
PKG_CPPFLAGS=-O2 -Wall
^D

then that will be added to CFLAGS.

If you lose changes, make them in the file config.site, and copy that
in when you build a new version of R.  Works for me!

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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