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| 6 | <title>PALM chapter 3.5.5</title> |
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| 8 | <meta name="AUTHOR" content="Siegfried Raasch"> |
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| 19 | <h3 style="line-height: 100%;"><font size="4">3.5.5 Compiling and |
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| 20 | linking user-defined code<br> |
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| 21 | </font></h3> |
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| 22 | <p style="line-height: 100%;">The compiling and linking of |
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| 23 | user-defined code into a model run is done via the shellscript |
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| 24 | <a |
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| 25 | href="http://www.muk.uni-hannover.de/institut/software/mrun_beschreibung.html">mrun</a>. |
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| 26 | The simplest (however not the most comfortable) way is by giving the |
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| 27 | filenames of the files containing the user-defined code as an argument |
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| 28 | of the shellscript option <a |
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| 29 | href="http://www.muk.uni-hannover.de/institut/software/mrun_beschreibung.html#Opt-s">-s</a>. |
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| 30 | If the user-defined subroutines are located e.g. on the two files <span |
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| 31 | style="font-family: monospace;">user1.f90</span> and <span |
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| 32 | style="font-family: monospace;">user2.f90</span>, then |
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| 33 | the <b>mrun</b> call has to be:<br> |
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| 34 | </p> |
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| 35 | <p style="line-height: 100%; margin-left: 40px;"><span |
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| 36 | style="font-family: monospace;">mrun... -s "user1.f90 user2.f90" ... .</span><br> |
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| 37 | </p> |
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| 38 | <p style="line-height: 100%;">For this call the user has to be in the |
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| 39 | working directory <tt><tt><font style="font-size: 10pt;" size="2">~/palm/current_version/SOURCE</font></tt></tt>, |
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| 40 | because the file with the source code of the main program is located |
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| 41 | here. The main program is compiled with |
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| 42 | each model run (without the appropriate filename given as argument for |
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| 43 | the |
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| 44 | option -s). </p> |
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| 45 | <p style="line-height: 100%;">The call </p> |
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| 46 | <ul> |
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| 47 | <pre style="margin-bottom: 0.5cm; line-height: 100%;"><font |
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| 48 | style="font-size: 10pt;" size="2">mrun
-s TEST
,</font></pre> |
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| 49 | </ul> |
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| 50 | <p style="line-height: 100%;">is simpler and causes the compilation |
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| 51 | of all files with suffix <tt><font style="font-size: 10pt;" size="2">.f90</font></tt> |
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| 52 | located in the working |
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| 53 | directory <font face="Thorndale, serif">a</font>nd having |
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| 54 | user write permissions. Unchanged sources of the default model |
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| 55 | have read permission only and therefore are not compiled with that |
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| 56 | call. </p> |
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| 57 | <p style="line-height: 100%;">Typically, users may have different |
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| 58 | versions |
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| 59 | of user-defined code which are to be used for different model runs. |
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| 60 | According to the method just described for starting a certain model |
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| 61 | run, |
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| 62 | the associated user-defined code would have to be copied into the |
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| 63 | working directory and code for other runs may have to be |
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| 64 | removed (otherwise theses files would be compiled as well and the |
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| 65 | routines like <tt><font style="font-size: 10pt;" size="2">user_actions</font></tt> |
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| 66 | would occur twice or several times which would lead to compiling |
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| 67 | errors). This procedure is quite tedious and can lead to errors if |
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| 68 | different |
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| 69 | model runs with restarts are to be carried out at the same time. It is |
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| 70 | better |
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| 71 | to store the different versions of user-defined code in different |
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| 72 | subdirectories |
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| 73 | using the base file name of the respective model run as subdirectory |
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| 74 | name. In this case a line like </p> |
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| 75 | <ul> |
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| 76 | <pre style="margin-bottom: 0.5cm; line-height: 100%;"><font |
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| 77 | style="font-size: 10pt;" size="2">% </font><a |
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| 78 | href="http://www.muk.uni-hannover.de/institut/software/mrun_beschreibung.html#add_source_path"><font |
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| 79 | style="font-size: 10pt;" size="2">add_source_path</font></a><font |
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| 80 | style="font-size: 10pt;" size="2"> $HOME/palm/current_version/SOURCE/USER_CODE/$fname</font></pre> |
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| 81 | </ul> |
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| 82 | <p style="line-height: 100%;">has to be added to the <b>mrun</b> |
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| 83 | configuration file. If you call <b>mrun</b> now with </p> |
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| 84 | <ul> |
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| 85 | <pre style="margin-bottom: 0.5cm; line-height: 100%;"><font |
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| 86 | style="font-size: 10pt;" size="2">mrun -d run1 -s user1.f90 user2.f90
,</font></pre> |
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| 87 | </ul> |
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| 88 | <p style="line-height: 100%;">the additional entry in the configuration |
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| 89 | file |
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| 90 | causes that the files given as argument of the option -s are also |
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| 91 | looked |
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| 92 | for in the directory <tt><font style="font-size: 10pt;" size="2">$HOME/palm/current_version/SOURCE/USER_CODE/run1</font></tt><font |
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| 93 | style="font-size: 10pt;" size="2">,</font> |
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| 94 | in case they are not found in the current working directory. The |
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| 95 | specification of <tt><font style="font-size: 10pt;" size="2">-s</font><font |
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| 96 | size="2"> |
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| 97 | TEST</font></tt> in the <b>mrun</b> call now causes compilation of all |
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| 98 | files with suffix <tt><font style="font-size: 10pt;" size="2">.f90</font></tt> |
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| 99 | and user write permissions which are located in the working |
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| 100 | directory or in the directory indicated by <span |
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| 101 | style="font-family: monospace;">add_source_path</span>. In |
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| 102 | this case no files with the same name are allowed to be in these two |
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| 103 | directories. </p> |
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| 104 | <p style="line-height: 100%;">Further detailed information for linking |
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| 105 | user-defined code with <b>mrun</b> can be found in <a |
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| 106 | href="http://www.muk.uni-hannover.de/institut/software/mrun_beschreibung.html#chapter7">chapter |
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| 107 | 7</a> of the <b>mrun </b>documentation (only in German). </p> |
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| 108 | <p style="line-height: 100%;">While programming user-defined code, |
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| 109 | errors are frequently made. Possible ways of error |
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| 110 | tracing are described in the next chapter. <br> |
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| 111 | </p> |
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| 112 | <hr> |
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| 121 | <p style="line-height: 100%;"><i>Last change: </i> 15/04/05 (SR)</p> |
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