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INSTALLING R UNDER UNIX


GENERALITIES

This document concerns building and installing R from sources.
Pre-made binaries are made available for some systems with varying
regularity and can be obtained from CRAN (see the RESOURCES file).

R will configure and build under a number of common Unix-like
platforms (including i386-freebsd, i386-linux, ppc-linux,
mips-sgi-irix, alpha-linux, alpha-dec-osf4, rs6000-ibm-aix,
hppa-hp-hpux, sparc-linux, and sparc-sun-solaris) and on Windows 9x/NT
(see src/gnuwin32/readme). In general it is relatively easy to adapt
R to new platforms. See the section on new platforms for details.


GETTING AND UNPACKING THE SOURCES

The simplest way is to download the most recent R-x.yy.z.tgz package,
and unpack them with

tar xvfz R-x.yy.z.tgz

on systems that have GNU tar installed. On other systems you need at
least to have the "gzip" program installed. Then you can do

gzip -dc R-x.yy.z.tgz | tar xvf -

If you need to transport the sources on floppy disks, you can download the
R-x.yy.z.tgz-split.* files. and paste them together at the destination
with

cat R-x.yy.z.tgz-split.* > R-x.yy.z.tgz

and proceed as above.

Finally, for minor-minor releases (x.yy.z with z != 0), a patch
against the preceding release is made available in
R-x.yy.{z-1}-x.yy.z.diff.gz (e.g. R-0.63.2-0.63.3.diff.gz), which is
generally a much shorter file that the .tgz files. Such a file can be
applied to the sources of the previous version by changing to the top
directory of it and

gzip -dc /path/to/it/R-x.yy.{z-1}-x.yy.z.diff.gz | patch -E -p1

Notice that this does not necessarily work if the older sources have
been modified (e.g. by building in their directories).


SIMPLE COMPILATION

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

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 this script to a place where users can invoke it, for example to
`/usr/local/bin/R'. You could also copy the man page `R.1' to a place
where your man reader finds it, such as `/usr/local/man/man1'. If you
want to install the complete R tree to, e.g., /usr/local/lib/R, see
section INSTALLATION below.

You do not necessarily have to build R in the top-level source
directory (say, TOP_SRCDIR). To build in BUILDDIR, cd there and run

TOP_SRCDIR/configure
make

and so on, as described further below. This has the advantage of always
keeping your source tree `clean'. (You may need GNU make to allow this.)

If you need or want to set certain configure variables to something
other than their default, you can do that by either editing the file
`config.site' or on the command line as

VAR="..." ./configure # Bourne shell compatibles
(setenv VAR "..."; ./configure) # C shell

One common variable to change is R_PAPERSIZE, which defaults to a4, not
letter.

If you have libraries and header files, e.g. for GNU readline, in
non-system directories, use the variables LIBS (for libraries) and
CPPFLAGS (for header files), respectively, to specify these locations.

Make will also build plain text help pages as well as HTML and LaTeX
versions of the documentation (the three kinds can also be generated
separately using make help, make html and make latex). Note that you need
Perl version 5, available via http://www.perl.com/CPAN/, to build the
documentation.
If this is not available on your system, you can obtain precompiled
documentation files via the `doc/pre-formatted-help' directory of the
Comprehensive R Archive Network (CRAN), see the file `RESOURCES' for
information on CRAN.

Now rehash if necessary, type `R' and reach for your S manuals ...
And, read the R FAQ (http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html).

The GNOME interface for R will only be built if you specify it:
see the GNOME section below.


INSTALLATION

After

./configure
make

have been completed successfully, you can install the complete R tree
to your system by typing

make install

This will install to the following directories:

$prefix/bin (some) executables
$prefix/man/man1 man pages
$prefix/lib/R all the rest (libraries, online help
system, ...)

where prefix is determined during configuration (typically /usr/local)
and can be set by running configure with the option

./configure --prefix=/where/you/want/R/to/go

Then the R executable will be installed in /where/you/want/R/to/go/bin,
and so on. The prefix of the installation directories can also be seen
in the status message that is displayed at the end of configure.


USING MAKE

To compile R, you currently most likely need GNU make. (To be more
precise, you need a version of make which accepts shell wildcards in
dependencies.) On Solaris 2.6 in particular, you need a version of
GNU make different from 3.77 (the current one); 3.76.1 works fine, as
does the Sun make. To build in a separate directory you need a make
than uses the VPATH variable: GNU make does but e.g. Sun make does
not.


USING FORTRAN

To compile R, you need a FORTRAN compiler or f2c, the FORTRAN-to-C
converter. The default is to search for f77, g77, fort77, f90, xlf,
cf77, and fc (in that order), and then for f2c, and use whichever is
found first; if none is found, R cannot be compiled. The search
mechanism can be changed using the `--with-g77', `--with-f77', and
`--with-f2c' command line options to configure. If your FORTRAN
compiler is in a non-standard location, you should set the enviroment
variable PATH accordingly before running configure.

If your FORTRAN libraries are in slightly peculiar places, you should
also look at LD_LIBRARY_PATH to make sure that all libraries are on this
path.

You must set whatever compilation flags (if any) are needed to ensure
that FORTRAN `integer' is equivalent to a C int pointer and FORTRAN
`double precision' is equivalent to a C double pointer. (Beware of
f2c and compilers whose integer type is by default equivalent to C
long on platforms where long != int.)


BUILDING THE GNOME INTERFACE

This interface is experimental and currently incomplete. For more
information on the GNOME interface and upcoming features, see
http://stat.auckland.ac.nz/~lyndon/roadmap.html.

The GNOME interface for R will only be built if you specify it by
running configure with the --with-gnome option. For example, you
might run

./configure --with-gnome

but please check you have all the requirements first. It is advisable to
have reasonably-up-to-date versions of the gnome and gtk+ libraries
(later than those in RedHat 6.0, for example). You can find the
versions you have by

gnome-config --version
gtk-config --version

We know 1.0.10 and 1.2.3 suffice. Updates are available, for example
from updates.redhat.com or ftp.gurulabs.com/pub/gnome/updates for
RPM-based systems. You need the following RPMs and their dependencies
installed:

gnome-libs
gnome-libs-devel
gtk+
gtk+-devel
glib
glib-devel

You will need also libglade 0.5 or later. For more information on
libglade and to download the source, see
http://www.daa.com.au/~james/gnome/.

libglade needs libxml 1.4, the source for which is available from the
GNOME ftp site (ftp.gnome.org and mirrors). RPMs of libxml-1.4 and
libxml-devel-1.4 are available from updates.redhat.com and mirrors, or
ftp.gurulabs.com/pub/gnome/updates. We are not aware of any current
RPMs for libglade.


NEW PLATFORMS (Standards Hah!)

There are a number of sources of problems when installing R on a new
hardware/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...

R Core Members
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