R devel - Jun 2007 - compiler usage after successful UNIX build

Hi,

I believe my question is pretty simple, but I'd like to give you brief
background first:

I work at a company with UNIX installed on a sparc-sun-solaris platform;
the OS version is SunOS 5.9. Several of us who work here have been
advocating for the installation of R on this server. The IT security
group at my company prefers not to install the gcc compilers on our UNIX
production servers; they're okay doing this in a test environment.

My question: After a successful build, is there anytime that R might
call the compiler? My (limited) understanding was that once the binaries
are created, the compiler is not used unless you're doing another build,
e.g., compiling source code for a package. Does R ever compile routines
during execution? Does it depend on how the installation was done?

Thanks for your help with this.


Paul Louisell
650-833-6254
ploua at allstate.com

On Mon, 11 Jun 2007, Louisell, Paul wrote:
> Hi,
>
> I believe my question is pretty simple, but I'd like to give you brief
> background first:
>
> I work at a company with UNIX installed on a sparc-sun-solaris platform;
> the OS version is SunOS 5.9. Several of us who work here have been
> advocating for the installation of R on this server. The IT security
> group at my company prefers not to install the gcc compilers on our UNIX
> production servers; they're okay doing this in a test environment.
Is their objection to gcc or compilers at all?  Sun's own Studio 11 
compilers are now free (and at least as good as gcc in that environment).
> My question: After a successful build, is there anytime that R might
> call the compiler? My (limited) understanding was that once the binaries
> are created, the compiler is not used unless you're doing another
build,
> e.g., compiling source code for a package. Does R ever compile routines
> during execution? Does it depend on how the installation was done?
It only compiles code when asked to do so.  That means running R CMD 
COMPILE or R CMD SHLIB.  The latter is run by R CMD INSTALL and that is 
run by install.packages() and elsewhere.  But you would need to have 
specified some C/C++/Fortran source code, so would be expecting this.

-- 
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)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595