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<divclass="title">GRIB API installation </div></div>
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<divclass="textblock"><p>GRIB API installation is based on the standard configure utility. It is tested on several platforms and with several compilers. However for some platforms modifications to the installation engine may be required. If you encounter any problem during the installation procedure please send an e-mail with your problem to <ahref="#"onclick="location.href='mai'+'lto:'+'Sof'+'tw'+'are'+'.S'+'upp'+'or'+'t@e'+'cm'+'wf.'+'in'+'t'; return false;">Softw<spanstyle="display: none;">.nosp@m.</span>are.<spanstyle="display: none;">.nosp@m.</span>Suppo<spanstyle="display: none;">.nosp@m.</span>rt@e<spanstyle="display: none;">.nosp@m.</span>cmwf.<spanstyle="display: none;">.nosp@m.</span>int</a>.</p>
<p>The only required package for a standard installation is <ahref="http://www.ece.uvic.ca/~mdadams/jasper/">jasper</a> which enables the jpeg2000 packing/unpacking algorithm. It is possible to build GRIB API without jasper, by using the –disable-jpeg configure option, but to install a fully functional library, its download is recommended.</p>
<p>The following instructions are valid only if you have already installed GRIB API and you need to update the current parameter files. The parameter files should work with any version of GRIB API.</p>
<p>To install the parameter files, then please unpack the downloaded archive in the definition files folder of your GRIB API installation, i.e.:</p>
<divclass="fragment"><divclass="line">> cd definitions</div>
<divclass="line">> tar xf grib_api_parameters-vX.tar</div>
</div><!-- fragment --><p>This process will overwrite any changes you might have done to the parameter files, so please do make a backup of the definition files folder before installing the downloaded GRIB API parameter files.</p>
<p>The following instructions are valid only if you have already installed GRIB API and you need to update the definition files compatible with the same library version you have already installed. Please note that using the definition files with a version of the library different from the one indicated as compatible will cause some problems in decoding/encoding.</p>
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<li>Download GRIB API definition files from <ahref="http://www.ecmwf.int/products/data/software/download/grib_api.html#definitions">ECMWF web site</a>.</li>
<divclass="line">> tar xf grib_def-X.X.X.X.tar</div>
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<li>Run the installation script from the grib_def-X.X.X.X directory: <divclass="fragment"><divclass="line">./installDefinitions.sh grib_api_dir def_files_dir</div>
</div><!-- fragment --> where grib_api_dir is the path to a working installation of GRIB API and def_files_dir is the directory where you want to install the new version of the defintion files. </li>
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