R help - Jun 2009 - Changing CRAN package compile option defaults?

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?

Allan

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

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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