/[MITgcm]/manual/s_getstarted/text/getting_started.tex

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-revision 1.41 by jmc,
Fri Jan 22 00:38:16 2010 UTC
+revision 1.46 by dimitri,
Sat Nov 21 03:19:54 2015 UTC
 Line 14 
 are described more fully in chapters \re
  \ref{chap:sarch}.
  \section{Where to find information}
- \label{sect:whereToFindInfo}
+ \label{sec:whereToFindInfo}
  \begin{rawhtml}
  <!-- CMIREDIR:whereToFindInfo: -->
  \end{rawhtml}
 Line 29 
 http://mitgcm.org/pipermail/mitgcm-suppo
  \begin{rawhtml} </A> \end{rawhtml}
  \section{Obtaining the code}
- \label{sect:obtainingCode}
+ \label{sec:obtainingCode}
  \begin{rawhtml}
  <!-- CMIREDIR:obtainingCode: -->
  \end{rawhtml}
 Line 63 
 provide easy support for maintenance upd
  \end{enumerate}
  \subsection{Method 1 - Checkout from CVS}
- \label{sect:cvs_checkout}
+ \label{sec:cvs_checkout}
  If CVS is available on your system, we strongly encourage you to use it. CVS
  provides an efficient and elegant way of organizing your code and keeping
 Line 92 
 You only need to do a ``cvs login'' once
  To obtain the latest sources type:
  \begin{verbatim}
- % cvs co MITgcm
+ % cvs co -P MITgcm
  \end{verbatim}
  or to get a specific release type:
  \begin{verbatim}
- % cvs co -P -r checkpoint52i_post  MITgcm
+ % cvs co -P -r checkpoint52i_post MITgcm
  \end{verbatim}
+ The CVS command ``\texttt{cvs co}'' is the abreviation of the full-name
+ ``\texttt{cvs checkout}'' command and using the option ``-P'' (\texttt{cvs co -P})
+ will prevent to download unnecessary empty directories.
  The MITgcm web site contains further directions concerning the source
  code and CVS.  It also contains a web interface to our CVS archive so
  that one may easily view the state of files, revisions, and other
  development milestones:
- %\begin{rawhtml} <A href="http://mitgcm.org/download" target="idontexist"> \end{rawhtml}
  \begin{rawhtml} <A href="http://mitgcm.org/viewvc/MITgcm/MITgcm/" target="idontexist"> \end{rawhtml}
  \begin{verbatim}
- http://mitgcm.org/source_code.html
+ http://mitgcm.org/viewvc/MITgcm/MITgcm/
  \end{verbatim}
  \begin{rawhtml} </A> \end{rawhtml}
-Line 142 
 updates.  More extensive information on
+Line 145 
 updates.  More extensive information on
  MITgcm code can be found
  \begin{rawhtml} <A href="http://mitgcm.org/public/using_cvs.html" target="idontexist"> \end{rawhtml}
  here
- \begin{rawhtml} </A> \end{rawhtml}
+ \begin{rawhtml} </A> \end{rawhtml}.
- .
  It is important to note that the CVS aliases in Table
  \ref{tab:cvsModules} cannot be used in conjunction with the CVS
  \texttt{-d DIRNAME} option.  However, the \texttt{MITgcm} directories
  they create can be changed to a different name following the check-out:
  \begin{verbatim}
-    %  cvs co MITgcm_verif_basic
+    %  cvs co -P MITgcm_verif_basic
     %  mv MITgcm MITgcm_verif_basic
  \end{verbatim}
+ Note that it is possible to checkout code without ``cvs login'' and without
+ setting any shell environment variables by specifying the pserver name and
+ password in one line, for example:
+ \begin{verbatim}
+    %  cvs -d :pserver:cvsanon:cvsanon@mitgcm.org:/u/gcmpack co -P MITgcm
+ \end{verbatim}
  \subsubsection{Upgrading from an earlier version}
  If you already have an earlier version of the code you can ``upgrade''
-Line 163 
 your copy instead of downloading the ent
+Line 172 
 your copy instead of downloading the ent
  \end{verbatim}
  and then issue the cvs update command such as:
  \begin{verbatim}
- % cvs -q update -r checkpoint52i_post -d -P
+ % cvs -q update -d -P -r checkpoint52i_post
  \end{verbatim}
  This will update the ``tag'' to ``checkpoint52i\_post'', add any new
  directories (-d) and remove any empty directories (-P). The -q option
-Line 209 
 have run into a problem for which ``we h
+Line 218 
 have run into a problem for which ``we h
  latest code'' and we haven't made a ``tag'' or ``release'' since that
  patch then you'll need to get the latest code:
  \begin{verbatim}
- % cvs -q update -A -d -P
+ % cvs -q update -d -P -A
  \end{verbatim}
  Unlike, the ``check-out'' and ``update'' procedures above, there is no
  ``tag'' or release name. The -A tells CVS to upgrade to the
-Line 220 
 also means we can't tell what version of
+Line 229 
 also means we can't tell what version of
  with. So please be sure you understand what you're doing.
  \subsection{Method 2 - Tar file download}
- \label{sect:conventionalDownload}
+ \label{sec:conventionalDownload}
  If you do not have CVS on your system, you can download the model as a
  tar file from the web site at:
-Line 277 
 structure).
+Line 286 
 structure).
    package corresponds to a subdirectory. For example, \texttt{gmredi}
    contains the code related to the Gent-McWilliams/Redi scheme,
    \texttt{aim} the code relative to the atmospheric intermediate
-   physics. The packages are described in detail in chapter \ref{chap.packagesI}.
+   physics. The packages are described in detail in chapter \ref{chap:packagesI}.
  \item \texttt{tools}: this directory contains various useful tools.
    For example, \texttt{genmake2} is a script written in csh (C-shell)
-Line 301 
 structure).
+Line 310 
 structure).
    decompositions.
  \item \texttt{verification}: this directory contains the model
-   examples. See section \ref{sect:modelExamples}.
+   examples. See section \ref{sec:modelExamples}.
  \item \texttt{jobs}: contains sample job scripts for running MITgcm.
-Line 312 
 structure).
+Line 321 
 structure).
  \end{itemize}
  \section[Building MITgcm]{Building the code}
- \label{sect:buildingCode}
+ \label{sec:buildingCode}
  \begin{rawhtml}
  <!-- CMIREDIR:buildingCode: -->
  \end{rawhtml}
-Line 321 
 To compile the code, we use the \texttt{
+Line 330 
 To compile the code, we use the \texttt{
  file (\texttt{Makefile}) that allows us to pre-process source files,
  specify compiler and optimization options and also figures out any
  file dependencies. We supply a script (\texttt{genmake2}), described
- in section \ref{sect:genmake}, that automatically creates the
+ in section \ref{sec:genmake}, that automatically creates the
  \texttt{Makefile} for you. You then need to build the dependencies and
  compile the code.
-Line 396 
 where the ``2'' can be replaced with a n
+Line 405 
 where the ``2'' can be replaced with a n
  number of CPUs available.
  Now you are ready to run the model. General instructions for doing so are
- given in section \ref{sect:runModel}. Here, we can run the model by
+ given in section \ref{sec:runModel}. Here, we can run the model by
  first creating links to all the input files:
  \begin{verbatim}
  ln -s ../input/* .
-Line 410 
 where we are re-directing the stream of
+Line 419 
 where we are re-directing the stream of
  \subsection{Building/compiling the code elsewhere}
- In the example above (section \ref{sect:buildingCode}) we built the
+ In the example above (section \ref{sec:buildingCode}) we built the
  executable in the {\em input} directory of the experiment for
  convenience. You can also configure and compile the code in other
  locations, for example on a scratch disk with out having to copy the
-Line 514 
 the one experiment:
+Line 523 
 the one experiment:
  \subsection{Using \texttt{genmake2}}
- \label{sect:genmake}
+ \label{sec:genmake}
  To compile the code, first use the program \texttt{genmake2} (located
  in the \texttt{tools} directory) to generate a Makefile.
  \texttt{genmake2} is a shell script written to work with all
  ``sh''--compatible shells including bash v1, bash v2, and Bourne.
- Internally, \texttt{genmake2} determines the locations of needed
+ %Internally, \texttt{genmake2} determines the locations of needed
- files, the compiler, compiler options, libraries, and Unix tools.  It
+ %files, the compiler, compiler options, libraries, and Unix tools.  It
- relies upon a number of ``optfiles'' located in the
+ %relies upon a number of ``optfiles'' located in the
- \texttt{tools/build\_options} directory.
+ %\texttt{tools/build\_options} directory.
+ \texttt{genmake2} parses information from the following sources:
+ \begin{description}
+ \item[-] a {\em gemake\_local} file if one is found in the current
+   directory
+ \item[-] command-line options
+ \item[-] an "options file" as specified by the command-line option
+   \texttt{--optfile=/PATH/FILENAME}
+ \item[-] a {\em packages.conf} file (if one is found) with the
+   specific list of packages to compile. The search path for
+   file {\em packages.conf} is, first, the current directory and
+   then each of the "MODS" directories in the given order (see below).
+ \end{description}
+ \subsubsection{Optfiles in \texttt{tools/build\_options} directory:}
  The purpose of the optfiles is to provide all the compilation options
  for particular ``platforms'' (where ``platform'' roughly means the
-Line 596 
 for inclusion.  Please send the file to
+Line 619 
 for inclusion.  Please send the file to
  \begin{rawhtml} </A> \end{rawhtml}
  mailing list.
+ \subsubsection{Command-line options:}
  In addition to the optfiles, \texttt{genmake2} supports a number of
  helpful command-line options.  A complete list of these options can be
  obtained from:
-Line 618 
 The most important command-line options
+Line 643 
 The most important command-line options
    the user's path.  When these three items have been identified,
    genmake2 will try to find an optfile that has a matching name.
- \item[\texttt{--pdefault='PKG1 PKG2 PKG3 ...'}] specifies the default
+ \item[\texttt{--mods='DIR1 DIR2 DIR3 ...'}] specifies a list of
-   set of packages to be used.  The normal order of precedence for
+   directories containing ``modifications''.  These directories contain
-   packages is as follows:
+   files with names that may (or may not) exist in the main MITgcm
-   \begin{enumerate}
+   source tree but will be overridden by any identically-named sources
-   \item If available, the command line (\texttt{--pdefault}) settings
+   within the ``MODS'' directories.
-     over-rule any others.
-   \item Next, \texttt{genmake2} will look for a file named
-     ``\texttt{packages.conf}'' in the local directory or in any of the
-     directories specified with the \texttt{--mods} option.
-   \item Finally, if neither of the above are available,
-     \texttt{genmake2} will use the \texttt{/pkg/pkg\_default} file.
-   \end{enumerate}
+   The order of precedence for this "name-hiding" is as follows:
+   \begin{itemize}
+   \item ``MODS'' directories (in the order given)
+   \item Packages either explicitly specified or provided by default
+     (in the order given)
+   \item Packages included due to package dependencies (in the order
+     that that package dependencies are parsed)
+   \item The "standard dirs" (which may have been specified by the
+     ``-standarddirs'' option)
+   \end{itemize}
+ \item[\texttt{--pgroups=/PATH/FILENAME}] specifies the file
+   where package groups are defined. If not set, the package-groups
+   definition will be read from {\em pkg/pkg\_groups}.
+   It also contains the default list of packages (defined
+   as the group ``{\it default\_pkg\_list}'' which is used
+   when no specific package list ({\em packages.conf})
+   is found in current directory or in any "MODS" directory.
  \item[\texttt{--pdepend=/PATH/FILENAME}] specifies the dependency file
    used for packages.
-Line 657 
 The most important command-line options
+Line 692 
 The most important command-line options
    "STAF" compiler.  As with any compilers, it is helpful to have their
    directories listed in your {\tt \$PATH} environment variable.
- \item[\texttt{--mods='DIR1 DIR2 DIR3 ...'}] specifies a list of
-   directories containing ``modifications''.  These directories contain
-   files with names that may (or may not) exist in the main MITgcm
-   source tree but will be overridden by any identically-named sources
-   within the ``MODS'' directories.
-   The order of precedence for this "name-hiding" is as follows:
-   \begin{itemize}
-   \item ``MODS'' directories (in the order given)
-   \item Packages either explicitly specified or provided by default
-     (in the order given)
-   \item Packages included due to package dependencies (in the order
-     that that package dependencies are parsed)
-   \item The "standard dirs" (which may have been specified by the
-     ``-standarddirs'' option)
-   \end{itemize}
  \item[\texttt{--mpi}] This option enables certain MPI features (using
    CPP \texttt{\#define}s) within the code and is necessary for MPI
-   builds (see Section \ref{sect:mpi-build}).
+   builds (see Section \ref{sec:mpi-build}).
  \item[\texttt{--make=/path/to/gmake}] Due to the poor handling of
    soft-links and other bugs common with the \texttt{make} versions
-Line 699 
 The most important command-line options
+Line 717 
 The most important command-line options
  \subsection{Building with MPI}
- \label{sect:mpi-build}
+ \label{sec:mpi-build}
  Building MITgcm to use MPI libraries can be complicated due to the
  variety of different MPI implementations available, their dependencies
-Line 714 
 The steps for building MITgcm with MPI s
+Line 732 
 The steps for building MITgcm with MPI s
  \item Determine the locations of your MPI-enabled compiler and/or MPI
    libraries and put them into an options file as described in Section
-   \ref{sect:genmake}.  One can start with one of the examples in:
+   \ref{sec:genmake}.  One can start with one of the examples in:
    \begin{rawhtml} <A
      href="http://mitgcm.org/viewvc/MITgcm/MITgcm/tools/build_options/">
    \end{rawhtml}
-Line 749 
 The steps for building MITgcm with MPI s
+Line 767 
 The steps for building MITgcm with MPI s
    \end{itemize}
  \item Build the code with the \texttt{genmake2} \texttt{-mpi} option
-   (see Section \ref{sect:genmake}) using commands such as:
+   (see Section \ref{sec:genmake}) using commands such as:
  {\footnotesize \begin{verbatim}
    %  ../../../tools/genmake2 -mods=../code -mpi -of=YOUR_OPTFILE
    %  make depend
-Line 803 
 the GNU g77 compiler and the mpich MPI l
+Line 821 
 the GNU g77 compiler and the mpich MPI l
  \end{verbatim} }
  \section[Running MITgcm]{Running the model in prognostic mode}
- \label{sect:runModel}
+ \label{sec:runModel}
  \begin{rawhtml}
  <!-- CMIREDIR:runModel: -->
  \end{rawhtml}
- If compilation finished succesfully (section \ref{sect:buildingCode})
+ If compilation finished succesfully (section \ref{sec:buildingCode})
  then an executable called \texttt{mitgcmuv} will now exist in the
  local directory.

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