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-revision 1.6 by jmc,
Tue Dec 23 22:42:20 2003 UTC
+revision 1.12 by dimitri,
Tue Apr 27 04:03:45 2010 UTC
 Line 22
            Initial version.
          </revremark>
        </revision>
+       <revision>
+         <revnumber>0.02</revnumber>
+         <date>2010-01-21</date>
+         <authorinitials>jmc</authorinitials>
+         <revremark>
+           update links.
+         </revremark>
+       </revision>
+       <revision>
+         <revnumber>0.03</revnumber>
+         <date>2010-04-25</date>
+         <authorinitials>jmc</authorinitials>
+         <revremark>
+           Add subsection "Developer settings" (under CVS Repository).
+         </revremark>
+       </revision>
      </revhistory>
      <abstract>
-Line 37
+Line 53
      <sect2>
        <title>New Versions of This Document</title> <para>You can
        obtain the latest version of this document <ulink
-       url="http://mitgcm.org/dev_docs/devel_HOWTO/">online</ulink> in
+       url="http://mitgcm.org/public/docs.html">online</ulink> in
        various formats.</para>
      </sect2>
      <sect2>
-Line 56
+Line 72
        <title>User Manual</title>
        <para>Before jumping into development, please familiarize yourself with
-         the <ulink url="http://mitgcm.org/docs.html"> MITgcm user manual
+         the <ulink url="http://mitgcm.org/public/docs.html"> MITgcm user manual
          </ulink>.  This document contains volumes of useful information and is
          included here by reference.</para>
-Line 94
+Line 110
    <sect1 id="cvs">
      <title>CVS Repository</title>
      <sect2>
        <title>Layout</title>
-Line 104
+Line 121
        others.  The tree currently resembles:</para>
  <programlisting>gcmpack/
-   MITgcm-contrib        contributed code
    CS-regrid             goes into utils
-   cvspolicy.html        -save-
+   CVSROOT               -hidden-
-   CVSROOT               -save-
-   development           experimental stuff
-   manual                -save-
-   misc                  -?-
    MITgcm                code
-        adjoint                  fold into genmake
+        bin                      empty
-        bin                      stub for ecco build
+        doc                      basic developpment documentation
-        compare01                old from 20th century
+        eesupp                   execution environment support code (wrapper)
-        diags                    timeave f77 in pkgs now
+        exe                      empty
-        doc                      tags -- connect to real docs?
+        jobs                     runtime shell scripts for
-        eesupp                   cnh?
+                                   various platforms (not maintained)
-        exe                      ecco user build
+        lsopt                    line search
-     ,- jobs                     runtime shell scripts for
+        model                    main dynamics (core)
-     |                             various platforms
+        optim                    line search interface
-     |  lsopt                    line search
+        pkg                      alternate and optional numerics, etc.
-    m|  model                    main dynamics (core)
+        tools                    scripts to build (and test)
-    e|    optimization_drivers   ?
+        utils                    pre/post processing tools (matlab, ..)
-    r|  optim                    line search interface
+        verification             standard regression tests + examples
-    g|  pkg                      alternate and optional numerics, etc.
+                                       + documented examples (tutorials)
-    e|- tools
+        tutorial_examples        (only in release1 branch)
-    ?|  tutorial_examples        documented tests
-     |                             only populated on release1 branch
-     |                             and not validated during "testscript"
-     '- utils
-        verification             std tests
+   MITgcm_contrib        contributed code
-   mitgcmdoc -> manual   -remove-
+   acesgrid.org          build acesgrid web site
+   development           experimental stuff
+   gcmpack               an old back-up copy ?
+   gfd_lab               -?-
+   manual                -save-
+   misc                  -?-
    mitgcm.org            build web site
+   mitgcmdoc  -> manual  -remove-
    models                -?-
    packages              -?-
+   pdfs                  some pdfs
+   planetinabottle.org   unfinished web site
    preprocess            -?-
    tmp                   -?-
+   www.ecco-group.org    build ecco web site ?
  </programlisting>
+  <!--
        <para>Efforts are underway to reduce the complexity.</para>
+ -->
      </sect2>
-Line 182
+Line 201
        <title>Branches</title>
        <para>As shown in the online <ulink
-       url="http://dev.mitgcm.org/cgi-bin/viewcvs.cgi/MITgcm/doc/tag-index?graph=1.174">ViewCVS-generated
+       url="http://mitgcm.org/viewvc/MITgcm/MITgcm/model/src/forward_step.F?view=graph">
-       tree</ulink>, the MITgcm codebase is split into to two branches
+       ViewCVS-generated tree</ulink>, the MITgcm codebase is split into
-       or "lines" under which development proceeds.  These two lines
+       branches or "lines" under which development proceeds.  The main line
-       are referred to as the "MAIN" and "ecco" versions of the code.
+       of development is referred to as the "MAIN" version of the code.
-       While not identical, the bulk of the MAIN and ecco lines are
-       composed of files from the same codebase.
        </para>
        <para>Periodically, a "Release" branch is formed from the "MAIN"
-       development branch.  This is done in order to create a
+       development branch.  This is done in order to create a relatively stable
-       relatively stable reference point for both users and developers.
+       reference point for both users and developers.  The intent is that once a
-       The intent is that once a relese branch has been created, only
+       release branch has been created, only bug-fixes will be added to it.
-       bug-fixes will be added to it.  Meanwhile, development (which
+       Meanwhile, development (which might "break" or otherwise render invalid
-       might "break" or otherwise render invalid the documentation,
+       the documentation, tutorials, and/or examples contained within a release
-       tutorials, and/or examples contained within a release branch) is
+       branch) is allowed to continue along the MAIN line.</para>
-       allowed to continue along the MAIN and ecco lines.</para>
      </sect2>
      <sect2>
-       <title>Tagging</title>
+       <title> Developer settings </title>
-       <para>The intent of tagging is to create "known-good"
+       <para>CVS is a convenient tool to keep up-to-date a personal copy of the
-       checkpoints that developers can use as references.
+       MITgcm code (see: <ulink url="http://mitgcm.org/public/using_cvs.html">
-       Traditionally, MITgcm tagging has maintained the following
+       using CVS </ulink>). The same tool is used by developers to
-       conventions:</para>
+       incorporate any change into the repository. However, this later
+       function requires specific settings, as detailed here after:</para>
+       <orderedlist>
+         <listitem>
+           <para> You will need an account (loggin access) to the server
+            "mitgcm.org" with the proper group setting (e.g.,
+             group "gcmctrb" to add/modify code into MITgcm_contrib).
+             This kind of account is granted only upon well motivated request.
+             The access to the server mitgcm.org is through ssh-key authorization
+             which will need to be set properly on both side (on your local machine
+             and on your server account). You need to be able to
+             to ssh to mitgcm.org (or <filename>ssh MY_USER_NAME@mitgcm.org</filename>
+             in case of different user-name on both sides) to proceed further.</para>
+         </listitem>
+         <listitem>
+           <para> You need to register to the
+         <ulink url="http://mitgcm.org/mailman/listinfo/mitgcm-cvs">
+       mitgcm-cvs </ulink> mailing list.
+           This ensures that other developers will receive email notification
+            when you make changes; you will also receive as well such email
+            when others make changes to the repository.
+           </para>
+         </listitem>
+         <listitem>
+           <para> It is highly recommended that you register also to the
+         <ulink url="http://mitgcm.org/mailman/listinfo/mitgcm-devel">
+       mitgcm-devel </ulink> mailing list (expect a short delay for
+        this request to be processed).
+           This list is intended for developer discussions.
+           </para>
+         </listitem>
+         <listitem>
+           <para> The standard anonymous mode (using "cvsanon", as mentionned
+         <ulink url="http://mitgcm.org/public/source_code.html">
+       here </ulink>) does not allow check-in ("cvs commit") permission.
+          Instead, you will need to set our CVS environment as follow:</para>
+ <screen>
+   $ export CVS_RSH=ssh
+   $ export CVSROOT=':ext:MY_USER_NAME@mitgcm.org:/u/gcmpack'
+ </screen>
+           <para> After downloading a directory, e.g.: <filename>myCopy</filename>,
+            from the CVS repository (e.g.,
+             <filename>MITgcm_contrib/thisPart</filename>) using the command:</para>
+ <screen>
+   $ cvs co -P -d myCopy MITgcm_contrib/thisPart
+ </screen>
+           <para> the type of CVS environment which has been used
+            is stored in the file <filename>myCopy/CVS/Root</filename>
+            and makes it difficult to re-use, for cvs-commit purpose,
+            a cvs local copy (<filename>myCopy</filename>) which was obtained
+            using the CVS anonymous mode.</para>
+         </listitem>
+         <listitem>
+           <para> At this stage, you should be able to send your modified source
+           file (e.g., <filename>src_file</filename>) from your local copy directory
+           (<filename>myCopy</filename>) to the CVS repository
+           (<filename>MITgcm_contrib/thisPart</filename>) using the command
+           "cvs commit":</para>
+ <screen>
+   $ cd myCopy
+   $ cvs -n update        (optional; check if new changes have been made)
+   $ cvs diff src_file    (optional; list your changes)
+   $ cvs commit src_file
+ </screen>
+           <para> It is essential that you provide a short description of the
+           changes you made to <filename>src_file</filename> as you check-in
+           this file (the "cvs commit" command automatically opens your standard
+           editor for this purpose).</para>
+         </listitem>
+       </orderedlist>
+     </sect2>
+     <sect2>
+       <title>Main code development</title>
+       <para>(formerly named "Tagging" ; this section needs an update)</para>
+       <para>The intent of tagging is to create "known-good" checkpoints that
+       developers can use as references.  Traditionally, MITgcm tagging has
+       maintained the following conventions:</para>
        <orderedlist>
          <listitem>
-           <para>Developer checks out code into a local CVS-managed
+           <para>Developer checks out code into a local CVS-managed directory,
-           directory, makes various changes/additions, tests these
+           makes various changes/additions, tests these edits, and eventually
-           edits, and eventually reaches a point where (s)he is
+           reaches a point where (s)he is satisfied that the changes form a new
-           satisfied that the changes form a new "useful" point in the
+           "useful" point in the evolution of the code.</para>
-           evolution of the code.</para>
          </listitem>
          <listitem>
            <para>The developer then runs the <ulink
-           url="http://dev.mitgcm.org/cgi-bin/viewcvs.cgi/MITgcm/verification/testscript">testscript</ulink>
+           url="http://mitgcm.org/viewvc/MITgcm/MITgcm/verification/testreport">
-           shell script to see if any problems are introduced.  While
+           testreport</ulink> shell script to see if any problems are introduced.
-           not intended to be exhaustive, the test cases within the
+           While not intended to be exhaustive, the test cases within the
-           verification directory do provide some indication whether
+           verification directory do provide some indication whether gross errors
-           gross errors have been introduced.
+           have been introduced.
            </para>
          </listitem>
-Line 233
+Line 332
            then:</para>
            <orderedlist>
              <listitem>
-               <para>adds a "checkpointXY_pre" comment (where X is a
+               <para>adds a "checkpointXY_pre" comment (where X is a checkpoint
-               checkpoint number and Y is a letter) to the <ulink
+               number and Y is a letter) to the <ulink
-               url="http://dev.mitgcm.org/cgi-bin/viewcvs.cgi/MITgcm/doc/tag-index">tag-index</ulink>
+               url="http://mitgcm.org/viewvc/MITgcm/MITgcm/doc/tag-index">
-               file and checks it into the CVS repository</para>
+               tag-index</ulink> file and checks it into the CVS
+               repository</para>
              </listitem>
              <listitem>
-               <para>submits the set of changes to the CVS repository
+               <para>submits the set of changes to the CVS repository and adds
-               and adds comments to <filename>tag-index</filename>
+               comments to <filename>tag-index</filename> describing what the
-               describing what the changes are along with a matching
+               changes are along with a matching "checkpointXY_post" entry</para>
-               "checkpointXY_post" entry</para>
              </listitem>
            </orderedlist>
          </listitem>
        </orderedlist>
-       <para>The result of this tagging procedure is a sequence of
+       <para>The result of this tagging procedure is a sequence of development
-       development checkpoints with comments which resembles:</para>
+       checkpoints with comments which resembles:</para>
  <programlisting>
  checkpoint50e_post
-Line 271 
 o fix small problem with in ptracers_wri
+Line 370 
 o fix small problem with in ptracers_wri
  checkpoint50d_pre
  </programlisting>
-       <para>This information can be used to refer to various stages of
+       <para>This information can be used to refer to various stages of the code
-       the code development.  For example, bugs can be traced to
+       development.  For example, bugs can be traced to individual sets of CVS
-       individual sets of CVS checkins based upon their first
+       checkins based upon their first appearance when comparing the results from
-       appearance when comparing the results from different
+       different checkpoints.</para>
-       checkpoints.</para>
      </sect2>
    </sect1>
-   <sect1 id="documentation">
-     <title>Editing the Documentation</title>
-     <sect2 id="documentation_getting">
-       <title>Getting the Docs and Code</title>
-       <para>The first step towards editing the documentation is to
-       checkout a copy of code, docs, and build scripts from the CVS
-       server using:</para>
- <screen>
-   $ export CVS_RSH=ssh
-   $ export CVSROOT=':ext:auden.lcs.mit.edu:/u/u3/gcmpack'
-   $ mkdir scratch
-   $ cvs co MITgcm manual mitgcm.org
- </screen>
-       <para>These commands extract the necessary information from the
-       CVS server and create a temporary (called
-       <filename>scratch</filename>) directory for the storage of the
-       HTML and other files that will be created.  Please note that you
-       must either create <filename>scratch</filename> as shown or edit
-       the various <filename>Makefile</filename>s and scripts used to
-       create the documentation.</para>
-     </sect2>
-     <sect2>
-       <title>Editing the Documentation</title>
-       <para>The documentation is contained in the
-       <filename>manual</filename> directory in a raw LaTeX format.
-       The main document is <filename>manual.tex</filename> and it uses
-       <command>\input{}</command>s to include the chapters and
-       subsections.</para>
-       <para>Since the same LaTeX source is used to produce PostScript,
-       PDF, and HTML output, care should be taken to follow certain
-       conventions.  Two of the most important are the usage of the
-       <command>\filelink{}{}</command> and
-       <command>\varlink{}{}</command> commands.  Both of these
-       commands have been defined to simplify the connection between
-       the automatically generated ("code browser") HTML and the HTML
-       version of the manual produced by LaTeX2HTML.  They each take
-       two arguments (corresponding to the contents of the two sets of
-       curly braces) which are the text that the author wishes to be
-       "wrapped" within the link, and a specially formatted link thats
-       relative to the <filename>MITgcm</filename> directory within the
-       CVS tree.</para>
-       <para>The result is a command that resembles either</para>
-       <orderedlist>
-         <listitem>
-           <para>a reference to a variable or subroutine name such as
-           <command>\varlink{tRef}{tRef}</command>, or </para>
-         </listitem>
-         <listitem>
-           <para>a reference to a file such as
-               <command>\varlink{tRef}{path-to-the-file_name.F}</command>
-               where the absolute path to the file is of the form
-               <filename>/foo/MITgcm/path/to/the/file_name.F</filename></para>
-               <para>(please note how the leading "/foo/MITgcm"
-               component of the path is dropped leaving the path
-               <emphasis>relative</emphasis> to the head of the code
-               directory and each directory separator "/" is turned
-               into a "-")</para>
-         </listitem>
-       </orderedlist>
-     </sect2>
-     <sect2>
-       <title>Building the Documentation</title>
-       <para>Given the directory structure of <xref
-       linkend="documentation_getting">, the entire documentation for the web
-       site can be built using:</para>
- <screen>
-   $ cd mitgcm.org/devel/buildweb
-   $ make All
- </screen>
-       <para>Which builds the PDF from the LaTeX source, creates the
-       HTML output from the LaTeX source, parses the FORTRAN code base
-       to produce a hyperlinked HTML version of the source, and then
-       determines the cross-linking between the various HTML
-       components.</para>
-       <para>If there are no errors, the result of the build process
-       (which can take 30+ minutes on a P4/2.5Ghz) will be contained
-       within a single directory called
-       <filename>scratch/dev_docs</filename>.  This is a freshly built
-       version of the entire on-line users manual.  If you have the
-       correct permissions, it can be directly copied to the web server
-       area:</para>
- <screen>
-   $ mv scratch/dev_docs /u/u0/httpd/html
- </screen>
-       <para>and the update is complete.</para>
-     </sect2>
-   </sect1>
    <sect1 id="coding">
      <title>Coding for MITgcm</title>
-Line 799 
 checkpoint50d_pre
+Line 787 
 checkpoint50d_pre
                special command option (see "-command" below) to invoke the MPI
                executable.  Examples of PBS scripts using MPI with testreport can be
                found in the <ulink
-               url="http://dev.mitgcm.org/cgi-bin/viewcvs.cgi/MITgcm_contrib/test_scripts/">
+               url="http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/test_scripts/">
                MITgcm-contrib area</ulink></para>
              </listitem>
            </varlistentry>
-Line 811 
 checkpoint50d_pre
+Line 799 
 checkpoint50d_pre
                output.txt" is not sufficient.  This option allows a more general
                command (or shell script) to be invoked.  Examples of PBS scripts
                using MPI with testreport can be found in the <ulink
-               url="http://dev.mitgcm.org/cgi-bin/viewcvs.cgi/MITgcm_contrib/test_scripts/">
+               url="http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/test_scripts/">
                MITgcm-contrib area</ulink></para>
              </listitem>
            </varlistentry>
-Line 838 
 checkpoint50d_pre
+Line 826 
 checkpoint50d_pre
          the generic fluid dynamical engine.</para>
        <para>The MITgcmUV packaging structure is described below using generic
-         package names ${pkg}.  A concrete examples of a package is the code for
+         package names ${pkg}. A concrete examples of a package is the code for
          implementing GM/Redi mixing. This code uses the package name</para>
      </sect2>
-Line 898 
 o  Each package gets its runtime configu
+Line 886 
 o  Each package gets its runtime configu
     Package runtime config. options are imported
     into a common block held in a header file
     called "${PKG}.h".
+    Note: In some packages, the header file "${PKG}.h" is splitted
+    into "${PKG}_PARAMS.h" that contains the package parameters and
+    ${PKG}_VARS.h" for the field arrays.
  o  The core driver part of the model can check
     for runtime enabling or disabling of individual packages
-Line 920 
 CPP Flags
+Line 911 
 CPP Flags
 . Within the core driver code flags of the form
         ALLOW_${PKG} are used to include or exclude
         whole packages. The ALLOW_${PKG} flags are included
-        from a PKG_CPP_OPTIONS block which is currently
+        from a PACKAGES_CONFIG.h file that is automatically
+        generated by genmake2 (see genmake2 section).
         held in-line in the CPP_OPTIONS.h header file.
         e.g.
         Core model code .....
+        #include "PACKAGES_CONFIG.h"
         #include "CPP_OPTIONS.h"
           :
           :
-Line 937 
 CPP Flags
+Line 930 
 CPP Flags
 . Within an individual package a header file,
         "${PKG}_OPTIONS.h", is used to set CPP flags
-        specific to that package. It is not recommended
+        specific to that package. It also includes
-        to include this file in "CPP_OPTIONS.h".
+        "PACKAGES_CONFIG.h" and "CPP_OPTIONS.h".
  Package Boot Sequence
-Line 990 
 Package Output
+Line 983 
 Package Output
          #ifdef ALLOW_${PKG}
            if ( use${Pkg} )
-      &       CALL ${PKG}_DIAGS( )
+      &       CALL ${PKG}_OUTPUT( )
          #endif
 . S/R PACKAGES_WRITE_PICKUP()
-Line 1006 
 Description
+Line 999 
 Description
        - ${PKG}_READPARMS()
      is responsible for reading
      in the package parameters file data.${pkg}, and storing
-     the package parameters in "${PKG}.h".
+     the package parameters in "${PKG}.h" (or in "${PKG}_PARAMS.h").
      -> called from INITIALISE_FIXED in PACKAGES_READPARMS
       - ${PKG}_INIT_FIXED()
-Line 1036 
 Description
+Line 1029 
 Description
       use for e.g. ${PKG}_INI_VARS, ${PKG}_INIT_VARIABLES, or the old
       form ${PKG}_INIT
-      - ${PKG}_DIAGS()
+      - ${PKG}_OUTPUT( )
-      is responsible for writing time-average diagnostics to output
+      is responsible for writing time-average fields to output files
-      files (but the cumulating step is done within the package main S/R).
+      (but the cumulating step is done within the package main S/R).
       Can also contain other diagnostics (.e.g. CALL ${PKG}_MONITOR)
       and write snap-shot fields that are hold in common blocks. Other
       temporary fields are directly dump to file where they are available.
-      NOTE: this part does not yet have a standard form and should be called
+      NOTE: 1) the S/R old name ${PKG}_DIAGS is used in some packages
-        from a package dedicated S/R such as PACKAGE_WRITE_DIAGS
+               but is beeing replaced by ${PKG}_OUTPUT
+               to avoid confusion with pkg/diagnostics functionality.
+) the output part is not yet in a standard form and might still
+               evolve a lot.
      -> called within DO_THE_MODEL_IO
       - ${PKG}_WRITE_PICKUP()
-Line 1070 
 Summary
+Line 1066 
 Summary
    -----------------------
    * ${PKG}_OPTIONS.h     has further package-specific CPP options
    * ${PKG}.h             package-specific common block variables, fields
+    or  ${PKG}_PARAMS.h   package-specific common block parameters
+    and ${PKG}_VARS.h     package-specific common block fields
  - FORTRAN source files
    -----------------------
-Line 1078 
 Summary
+Line 1076 
 Summary
    * ${pkg}_check.F        checks package dependencies and consistencies
    * ${pkg}_init_varia.F   initialises package-related fields
    * ${pkg}_... .F         package source code
-   * ${pkg}_diags.F        write diagnostics to file.
+   * ${pkg}_output.F       write output to file.
    * ${pkg}_write_pickup.F write a package pickup file to restart the model
+   New: Subroutine in one package (pkgA) that only contains code which
+        is connected to a 2nd package (pkgB) (e.g.: gmredi_diagnostics_init.F)
+        will be named: pkgA_pkgB_something.F
  - parameter file
    -----------------------
    * data.${pkg}          parameter file
-Line 1089 
 Summary
+Line 1091 
 Summary
    </sect1>
+   <sect1 id="documentation">
+     <title>Editing the Documentation</title>
+     <sect2 id="documentation_getting">
+       <title>Getting the Docs and Code</title>
+       <para>The first step towards editing the documentation is to checkout a
+       copy of code, docs, and build scripts from the CVS server using:</para>
+ <screen>
+   $ export CVS_RSH=ssh
+   $ export CVSROOT=':ext:NAME@mitgcm.org:/u/gcmpack'
+   $ mkdir scratch
+   $ cvs co -P MITgcm manual mitgcm.org
+ </screen>
+       <para>These commands extract the necessary information from the CVS server
+       and create a temporary (called <filename>scratch</filename>) directory for
+       the storage of the HTML and other files that will be created.  Please note
+       that you must either create <filename>scratch</filename> as shown or edit
+       the various <filename>Makefile</filename>s and scripts used to create the
+       documentation.</para>
+     </sect2>
+     <sect2>
+       <title>Editing the Documentation</title>
+       <para>The documentation is contained in the <filename>manual</filename>
+       directory in a raw LaTeX format.  The main document is
+       <filename>manual.tex</filename> and it uses <command>\input{}</command>s
+       to include the chapters and subsections.</para>
+       <para>Since the same LaTeX source is used to produce PostScript, PDF, and
+       HTML output, care should be taken to follow certain conventions.  Two of
+       the most important are the usage of the <command>\filelink{}{}</command>
+       and <command>\varlink{}{}</command> commands.  Both of these commands have
+       been defined to simplify the connection between the automatically
+       generated ("code browser") HTML and the HTML version of the manual
+       produced by LaTeX2HTML.  They each take two arguments (corresponding to
+       the contents of the two sets of curly braces) which are the text that the
+       author wishes to be "wrapped" within the link, and a specially formatted
+       link thats relative to the <filename>MITgcm</filename> directory within
+       the CVS tree.</para>
+       <para>The result is a command that resembles either</para>
+       <orderedlist>
+         <listitem>
+           <para>a reference to a variable or subroutine name such as
+           <command>\varlink{tRef}{tRef}</command>, or </para>
+         </listitem>
+         <listitem>
+           <para>a reference to a file such as
+               <command>\varlink{tRef}{path-to-the-file_name.F}</command>
+               where the absolute path to the file is of the form
+               <filename>/foo/MITgcm/path/to/the/file_name.F</filename></para>
+               <para>(please note how the leading "/foo/MITgcm"
+               component of the path is dropped leaving the path
+               <emphasis>relative</emphasis> to the head of the code
+               directory and each directory separator "/" is turned
+               into a "-")</para>
+         </listitem>
+       </orderedlist>
+     </sect2>
+     <sect2>
+       <title>Building the Documentation</title>
+       <para>Given the directory structure of <xref
+       linkend="documentation_getting">, the entire documentation for the web
+       site can be built using:</para>
+ <screen>
+   $ cd mitgcm.org/devel/buildweb
+   $ make All
+ </screen>
+       <para>Which builds the PDF from the LaTeX source, creates the HTML output
+       from the LaTeX source, parses the FORTRAN code base to produce a
+       hyperlinked HTML version of the source, and then determines the
+       cross-linking between the various HTML components.</para>
+       <para>If there are no errors, the result of the build process (which can
+       take 30+ minutes on a P4/2.5Ghz) will be contained within a single
+       directory called <filename>scratch/dev_docs</filename>.  This is a freshly
+       built version of the entire on-line users manual.  If you have the correct
+       permissions, it can be directly copied to the web server area:</para>
+ <screen>
+   $ mv scratch/dev_docs /u/u0/httpd/html
+ </screen>
+       <para>and the update is complete.</para>
+     </sect2>
+   </sect1>
  </article>

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