[R] Changing CRAN package compile option defaults?

[Prof Brian Ripley]

On Fri, 12 Jun 2009, Allan Engelhardt wrote:

> Is there an easy way to override the compile options when installing packages 
> from CRAN on Unix-style systems?  I tried setting CFLAGS, CXXFLAGS, and 
> FFLAGS but they are not picked up.
>
> For example (with a random package and adding -mtune only to try to get rid 
> of the default)
>
> export CFLAGS="-march=native -mtune=native"
> export CXXFLAGS="-march=native -mtune=native"
> R CMD INSTALL gstat_0.9-60.tar.gz
> [...]
> gcc -m64 -std=gnu99 -I/usr/include/R  -I/usr/local/include    -fpic  -O2 -g 
> -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector 
> --param=ssp-buffer-size=4 -m64 -mtune=generic -c block.c -o block.o
> [...]
>
> I am building a custom system and I'd like to get rid of '-g' (won't debug on 
> that system) and change '-mtune=generic' to '-march=native' (don't need 
> compatibility with other systems).
>
> Is there an easy way of doing this for all packages I build?

Yes: read 'R Installation and Administration' section 6.3.3 (at least 
of the version on CRAN).

Also, it seems likely that you should be building R itself with the 
options you want for packages: how to do that is discussed in the same 
manual.  (Looks like this may be a pre-compiled Linux binary 
distribution of R, but we don't know, of course.)  In that case you 
don't need to set anything else.


> Allan
>
> (Currently re-compiling BLAS and friends with -march=native.)

-- 
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 272866 (PA)
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