NAG C Library, Mark 7

CLL6407DAL - License Managed

Intel IA-64, Linux, GNU C

Installer's Note


1. Introduction

This Installer's Note is essential reading for whoever is responsible for the installation of this implementation of the NAG C Library. It is supplied in printed form to accompany the software, and is also available together with the Users' Note (un.html) in the doc directory on the distribution medium.

Your attention is drawn to the terms and conditions of the Software Licence regarding the use of NAG software. Any request to use this software other than on the licensed computer must be referred to NAG, as should requests for information about the availability of other implementations.

2. Implementation Provided

2.1. Applicability

This implementation is a compiled, tested, ready-to-use version of the NAG C Library that is considered suitable for operation on the computer systems detailed below:

hardware:         Intel 64-bit systems
operating system: Linux 2.4.21-9 (Red Hat Enterprise Linux 3.0) or compatible  
C compiler:       gcc version 3.2.3 or compatible 

2.2. Derivation

This implementation was produced at NAG Ltd., Oxford on the computing system detailed below:

hardware:         Intel Itanium 
operating system: Linux 2.4.21-9 (RHEL 3 (Taroon Update 1)) 
C compiler:       gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-24) 
compiler options: -fPIC -D_REENTRANT -fexceptions 

The entire NAG C Library, Mark 7, was compiled with full optimization (-O3), except for the following functions, which had to be compiled at lesser optimization levels:

    c06ncsn (-O0)    d02qft  (-O0)    f06qzz  (-O0)    s17dezn (-O0) 
    c06ncun (-O0)    d03plln (-O0)    f06sjf  (-O0)    s17dgzn (-O0) 
    c06nxsn (-O0)    e04ucj  (-O2)    s17devn (-O0)    s17dlzn (-O0) 

This Library has been tested with the Basic Linear Algebra Subprograms (BLAS) and linear algebra functions (LAPACK) provided by NAG (see the Chapter Introductions for f06, f07 and f08 in the NAG C Library Manual) and not with BLAS/LAPACK routines from other sources.

3. Distribution Medium

The software is ordinarily distributed in tar format on CD-ROM.

3.1. Contents

The following shows the directory/file organization of the library materials as they will be installed.
                      |-- in.html
            |-- doc --|-- un.html
            |         |-- nag_c_un.3
            |-- libnagc.a    (static library)
            |-- (dynamic library)
cll6407dal -|-- include --|-- *.h
            |              |-- source ---|-- ??????e.c
            |-- examples --|-- data -----|-- ??????e.d
            |              |-- results --|-- ??????e.r
            |-- scripts ---|-- nagexample
            |              |-- bin ------|-- * (directories of FLEXlm binaries
            |              |                    for supported platforms)
            |-- license ---|-- README.TXT
                           |-- htmlman --|-- flexuser --|-- * (End User Guide)

The following shows the directory/file organization of the PDF documentation materials as they will be installed.

                        |- mark7.html (main index)
                        |- libdoc.css (cascading style sheet)
                        |- genint -|- *.html (introductory material)
                        |          |- *.gif (NAG images)
                        |- images -|
                        |          |- topbar -|- *.gif (C Library images)
               |- html -|
               |        |                    |- gams.html (main GAMS index)
               |        |           |- gams -|
               |        |           |        |- *.html (GAMS files)
               |        |- indexes -|
               |        |           |        |- kwic.html (main KWIC index)
NAGdoc -|- cl -|        |           |- kwic -|
               |        |                    |- *.html (KWIC files)
               |        |
               |        |- [A00-X04] -|- *conts.html (chapter indexes)
               |       |- frontmatter -|- mark7.pdf (NAG copyright)
               |       |
               |       |- genint -|- *.pdf (introductory material)
               |       |
               |- pdf -|- indexes -|- *.pdf (index note)
               |       |
               |       |- INUNs -|- *.pdf (implementation-specific note)
               |       |
               |       |- [A00-X04] -|- *.pdf (chapter and routine files)
               |- examples -|- vrb -|- *.txt (miscellaneous example files)

3.2. File Sizes

The files require approximately the following disk space:
compiled libraries:  libnagc.a:        27.0 Mb
                17.7 Mb
include files:                          1.2 Mb
example program material:               4.2 Mb
library documentation files:            0.1 Mb
scripts:                                0.1 Mb
PDF documentation files:                 87 Mb
licensing materials                    53.8 Mb

4. Installation

4.1. Library Installation

To install all material use the Unix tar utility, e.g.

tar xvf /cdrom/cl07.tar
(assuming the CD-ROM has been mounted as /cdrom).

The static and dynamic (shareable) versions of the NAG C library are functionally equivalent. Sites should determine whether they prefer one type of library to the other. The advantages (briefly) of using the static library are:

The main advantage of using a dynamic library is that executables are kept significantly smaller and applications can take advantage of patches without needing to relink.

After taking the above remarks into consideration, you may decide to delete one of the libraries.

One or both of the object libraries (libnagc.a, should be moved to a directory, such as /usr/lib, in the default search path of the linker, if possible, so that linkage is convenient. If you decided to install the shareable library ( then, once the library is in place, a symbolic link should be made to point to it:

ln -s

The include files should be moved to a directory such as /usr/include so that they can be accessed during compilation, e.g.

mv include/*.h /usr/include

The script nagexample refers to the local directory containing the example programs. The file should be copied to (for example) /usr/local/bin, modified to reflect the local installation, and its protection set to world execute.

The man page, which directs users to the HTML form of the Users' Note, should be modified to reflect the local installation, and moved to a directory in the man search path, e.g.

cd doc
mv nag_c_un.3 /usr/local/man/man3

4.1.1. License Management

The use of the NAG C Library is controlled by the FLEXlm network license management system (FLEXlm is a registered trademark of Globetrotter Software Inc). This release of the NAG C Library uses version 9.2.3 of FLEXlm.

In order to enable the software, NAG will issue you with a license key. The license key is a simple text file (usually called license.dat), containing details of the software that will be enabled.

To request a license key, locate and run the program key_rqst in the appropriate platform specific subdirectory under the license/bin/ subdirectory of the software distribution. This utility does not have a GUI and must be run from a command prompt. Complete the form that it displays and e-mail (or FAX) it to NAG.

A short term (demonstration or trial) license key contains one or more lines like the following:

FEATURE NAG_CL NAG 7.000 10-apr-2002 0 CBDA2041DC1BC45D2B68 "ANY" DEMO
Specifically, it does not have any lines starting with the word SERVER and is referred to here as an uncounted license key. Longer term uncounted license keys must be locked to a specific computer, i.e. they will enable the software on one computer only. These license keys include the FLEXlm hostid of the computer instead of the word DEMO above.

Once you have obtained the license key, store the text of it in a file, say /opt/nag/license.lic.

If the license file contains one or more SERVER lines, the FLEXlm daemons must be started before you can use the license. Refer to the FLEXlm End Users Guide supplied in the license/htmlman/flexuser/ subdirectory (start at the file TOC.htm).

For an uncounted license, the location of the license file must be made known to the NAG application by setting the environment variable LM_LICENSE_FILE to the full pathname of the file before the application is invoked.

For example, in the C-shell, type:

   setenv LM_LICENSE_FILE /opt/nag/license.lic
or in the Bourne shell, type:
No other actions are required to install an uncounted license.

Further details about FLEXlm and how it may be configured to suit your local circumstances are included in the FLEXlm End Users Guide.

4.2. PDF Documentation Installation

To install all PDF documentation material, use the Unix tar utility, e.g.
tar xvf /cdrom/pdf.tar
(assuming the CD-ROM has been mounted as /cdrom).

You may wish to move the PDF documentation files to the same location as that for other NAG products. You are encouraged to make them readily available to users, but in such a way that they are not generally accessible from outside your site.

If you do not already have a copy of Adobe Acrobat Reader for your platform, a free copy can be downloaded from Please check this site for availability of a reader for your platform.

Please note that if you are using Adobe Acrobat 4.0 or earlier you might experience some problems when printing documents that contain non-standard characters, such as integral signs, square roots and large brackets. These characters will print correctly using Adobe Acrobat 5.0.

The HTML form of the Essential Introduction contains some mathematical characters that are displayed as question marks by older browers such as pre-version 6 Netscape. However these are displayed correctly by recent browsers including Internet Explorer. They may also be viewed via the PDF.

If using Netscape, it might be necessary to re-install Acrobat to ensure that the Acrobat plug-in has been installed. If the plug-in has not been installed, Netscape may copy PDF files to a temporary directory, and then not be able to navigate from there.

4.3. Release to Users

The Users' Note (doc/un.html) should be checked and amended as necessary (particularly Sections 3.1 and 5). Advice on accessing the library in Section 3.1 can be checked by running a few example programs following that advice; a suitable sample would be a02bac, d01ajc, g05ffc and s17akc. The installation can also be tested using the script nagexample. The Users' Note should then be made available to users directly, or be absorbed into local access information.

The following material should also be made accessible to users:

Documentation files:

the NAGdoc directory contains the online documentation.

One or more of the compiled libraries:

libnagc.a (symbolic link pointing to
Include files:
Example program material:

Note that the example material has been adapted, if necessary, from that published in the NAG C Library Manual, so that programs are suitable for execution with this implementation with no further changes (but see Section 4.4 for comments about possible differences in results obtained). Making the example material directly available to users provides them with easily adaptable templates for their own problems.

4.4. Example Programs

The example results distributed were generated at Mark 7, using the static library libnagc.a and the software described in Section 2.2. These example results may not be exactly reproducible if the example programs are run in a slightly different environment (for example, a different C compiler, a different compiler library, different arithmetic hardware, or a different set of BLAS or LAPACK functions). The results which are most sensitive to such differences are: eigenvectors (which may differ by a scalar multiple, often -1, but sometimes complex); numbers of iterations and function evaluations; and residuals and other "small" quantities of the same order as the machine precision.

The "example programs" for the functions in the f06 chapter are not typical example programs and they are not in the Library Manual. They are test programs, which are supplied to sites for use in an installation test of the Library.

4.5 Maintenance Level

The maintenance level of the library can be determined by writing a simple program to call a00aac, which prints out details of the implementation, including title and product code, compiler, mark and maintenance level.

5. Documentation

Each supported NAG C Library site is ordinarily provided with a printed copy of the NAG C Library Introductory Guide. Additional documentation is available for purchase; please refer to the NAG websites or contact your local NAG Response Centre for current prices (see Section 6).

Online documentation is bundled with this implementation. Please see Section 4.2.

6. Support from NAG

(a) Contact with NAG

Queries concerning this document or the implementation generally should be directed initially to your local Advisory Service. If you have difficulty in making contact locally, you can contact NAG directly at one of the addresses given in the Appendix. Users subscribing to the support service are encouraged to contact one of the NAG Response Centres (see below).

(b) NAG Response Centres

The NAG Response Centres are available for general enquiries from all users and also for technical queries from sites with an annually licensed product or support service.

The Response Centres are open during office hours, but contact is possible by fax, email and phone (answering machine) at all times.

When contacting a Response Centre it helps us deal with your enquiry quickly if you can quote your NAG site reference and NAG product code (in this case CLL6407DAL).

(c) NAG Websites

The NAG websites provide information about implementation availability, descriptions of products, downloadable software, product documentation and technical reports. The NAG websites can be accessed at the following URLs:, (in North America) or (in Japan)

(d) NAG Electronic Newsletter

If you would like to be kept up to date with news from NAG then please register to receive our free electronic newsletter, which will alert you to special offers, announcements about new products or product/service enhancements, customer stories and NAG's event diary. You can register via one of our websites, or by contacting us at

7. User Feedback

Many factors influence the way NAG's products and services evolve and your ideas are invaluable in helping us to ensure that we meet your needs. If you would like to contribute to this process we would be delighted to receive your comments. Please contact your local NAG Response Centre (shown below).

Appendix - Contact Addresses

Wilkinson House
Jordan Hill Road
OXFORD  OX2 8DR                         NAG Ltd Response Centre
United Kingdom                          email:
Tel: +44 (0)1865 511245                 Tel: +44 (0)1865 311744
Fax: +44 (0)1865 310139                 Fax: +44 (0)1865 310139
1431 Opus Place, Suite 220
Downers Grove
IL 60515-1362                           NAG Inc Response Center
USA                                     email:
Tel: +1 630 971 2337                    Tel: +1 630 971 2345
Fax: +1 630 971 2706                    Fax: +1 630 971 2706
Nihon NAG KK
Hatchobori Frontier Building 2F

Tel: +81 (0)3 5542 6311
Fax: +81 (0)3 5542 6312