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INSTALLING R UNDER UNIX


GENERALITIES

R will configure and build under a number of common Unix platforms
including dec-alpha-osf, freebsd, hpux, linux-elf, sgi-irix, solaris,
and sunos. In general it is relatively easy to adapt R to new
platforms. See below for details.


SIMPLE INSTALLATION

Choose a place to install the R tree (R is not just a binary, but
has additional data sets, help files, font metrics etc). Let's call
this place RHOME. Untar the source code. This should create
directories src, etc, cmd, help and doc. Issue the following
commands:

./configure
make
make help

You can also build a LaTeX version of the manual entries with

make latex

and an HTML version of the manual with

make html

These are not fully supported yet.

To build help pages and LaTeX and HTML versions of the manual in one
step, do

make docs

If these commands execute successfully, the R binary will be copied
to the $RHOME/bin directory. In addition, a shell script font-end
called "R" will be created and copied to the same directory. You
can copy the script to a place where users can invoke it:
/usr/local/bin/R for example.

Now type R and reach for your S manuals ...


USING FORTRAN

R is "shipped" configured so that it does not need a Fortran compiler
to build and install. For performance or other reasons you may
wish to use your Fortran compiler to compile those pieces of R
which are written in Fortran. To do this, edit the file config.site
and change the line "F77=no" as indicated in the comments above
before typing configure. There are no guarantees that this will
work, but it may.


NEW PLATFORMS (Standards Hah!)

There are a number of sources of problems when installing R on a new
harware/os platform.

 1. Floating Point Arithmetic: R supports the POSIX, SVID and IEEE
    models for floating point arithmetic. The POSIX and SVID models
    provide no problems. The IEEE model however can be a pain. The
    problem is that there is no agreement on how to set the signalling
    behavior; sgi/irix and linux require no special action, freebsd
    requires a call to (the macro) fpsetmask(0) and osf1v3.2 requires
    that computation be done with a -ieee_with_inexact flag etc...
    On a new platform you must find out the magic recipe and add some
    code to make it work. This can often be done via the file
    config.site which resides in the top level directory.

 2. Shared Libraries: There seems to be very little agreement across
    platforms on what needs to be done to build shared libraries.
    there are many different combinations of flags for the compilers
    and loaders. The technique we use is to interrogate the X window
    system about what it does (using xmkmf). This often works, but
    you may have to manually override the results. Scanning the cc(1)
    and ld(1) manual entries usually reveals the correct incantation.
    Once you know the recipe you can modify the file config.site
    (following the instructions therein) so that the build will use
    these options.

If you do manage to get R running on a new platform please let us know
about it so we can modify the configuration procedures to include that
platform.

If you are having trouble getting R to work on your platform please
feel free to get in touch to ask questions. We've had a fair amount
of practice at porting R to new platforms...

Ross-n-Robert
R@stat.auckland.ac.nz
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