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NeXus - a common format for neutron and X-ray scattering data
             http://www.nexusformat.org/
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Installation Instructions
=========================

Unix (including Mac OS X)
-------------------------

We have recently changed the installation procedure to use the GNU autoconf 
system.  This will automatically check for the relevant HDF and other libraries
and adjust the configuration scripts accordingly.

1) Ensure that you have current versions of the HDF4 and/or the HDF5 
   libraries.  It is now possible to link the NeXus libraries against 
   either or both libraries, depending on the selected make option.
 
   The libraries, which are available as precompiled binaries for a wide
   range of systems, may be downloaded from:
   
    http://www.hdfgroup.org/

2) At present it is necessary to run the autogen shell script to produce the 
   correct configure file.

   sh autogen.sh

3) Run 'configure' and 'make'.

   ./configure
   ./make
   
   If there are any problems, try different configure options to see if one 
   will work.  You can see what switches are available by typing
   
   ./configure --help

4) Install the files in the default location (usually /usr/local/nexus) using

   make install

5) Test the installation using 

   make test
   
   The standard test procedures produce the following output:
   
 Number of global attributes:  4
    NeXus_version = 2.0.0.
    file_name = NXtest.nx5
    HDF5_Version = 1.4.3
    file_time = 2002-05-17 14:40:24-0600
 Group: entry(NXentry) contains  8 items
    ch_data( 4)
    Values : NeXus data
    Subgroup: data(NXdata)
    i1_data(20)
    Values :   1  2  3  4
    i2_data(22)
    Values :   1000  2000  3000  4000
    i4_data(24)
    Values :      1000000     2000000     3000000     4000000
    r4_data( 5)
    Values :    1.00   2.00   3.00   4.00
           :    5.00   6.00   7.00   8.00
           :    9.00  10.00  11.00  12.00
           :   13.00  14.00  15.00  16.00
           :   17.00  18.00  19.00  20.00
    r8_data( 6)
    Values :    1.00   2.00   3.00   4.00
           :    5.00   6.00   7.00   8.00
           :    9.00  10.00  11.00  12.00
           :   13.00  14.00  15.00  16.00
           :   17.00  18.00  19.00  20.00
       ch_attribute : NeXus
       i4_attribute :    42
       r4_attribute :   3.141593
    Subgroup: sample(NXsample)
 Link Check OK

   There are small differences in the formatting of the C and Fortran 
   files.  All of them may be viewed by NXbrowse using, e.g.:
   
   ./NXbrowse NXtest.nxs
   
Windows
-------
   See README.WIN32.

Mac OS X
--------
   See README.macosx

VMS
---
1) There is no VMS version of HDF5, so it is only possible to link to 
   the HDF4 libraries.  Ensure that you have the current versions, 
   which are available as precompiled binaries at:
   
    http://www.hdfgroup.org/

   The NeXus libraries link against the following libraries:
   
2) Edit MAKE_VMS.COM to specify the correct location of the HDF 
   libraries, and comment out either the F77 or F90 options if necessary.
   
3) If you are installing the Fortran 90 library, edit NXtest.f90 to 
   replace NXACC_CREATE5 with NXACC_CREATE4 in the first call to NXopen.

4) Run MAKE_VMS.COM (i.e. type @MAKE_VMS) to build the NeXus libraries 
   and utilities.

5) Run the test programs to check the installation.

   $ RUN NAPI4_TEST           (Tests C creation of NXtest.nx4)
   $ RUN NAPIF_TEST or NXtest (Tests Fortran creation of NXtest.nxs)

6) Install the NeXus libraries NEXUS.OLB and/or NEXUS90.OLB, and the 
   include (or module) files in a standard location for building other 
   NeXus programs.
   

Comments to : ROsborn@anl.gov

Argonne National Laboratory is operated by The University of Chicago for
the U.S. Department of Energy under contract W-31-109-ENG-38.
LEGAL POSTLUDE
--------------
The NeXus API is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published 
by the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

The NeXus API is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.

DISCLAIMER OF LIABILITY: This document was prepared as an account of
work sponsored by an agency of the U.S. Government. Neither the U.S.
Government nor any agency thereof, nor the University of Chicago, nor
any of their employees or officers, makes any warranty, express or
implied, or assumes any legal liability or responsibility for the
accuracy, completeness, or usefulness of any information, apparatus,
product, or process disclosed, or represents that its use would not
infringe privately owned rights. 

DISCLAIMER OF ENDORSEMENT: Reference to any specific commercial
product, process, or service by trade name, trademark, manufacturer,
or otherwise does not necessarily constitute or imply its endorsement,
recommendation, or favoring by the U.S. Government or any agency
thereof. The views and opinions of document authors do not necessarily
state or reflect those of the U.S. Government or any agency thereof,
Argonne National Laboratory, or the University of Chicago.

COPYRIGHT STATUS: Documents authored by Argonne National Laboratory
employees resulted from work under U.S. Government contract
W-31-109-ENG-38 and are subject to the following license: the
Government is granted for itself and others acting on its behalf a
paid-up, nonexclusive, irrevokable worldwide license in these
documents to reproduce, prepare derivative works, and perform publicly
and display publicly by or on behalf of the Government.

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$Id$