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Install separately:
grib-api - this is available from the OpenIFS ftp download site. Although this is also available from the ECMWF software download page, it's recommended the one provided on the ftp site is used as it will have been tested and known to work with OpenIFSa library and set of commands for working with and manipulating GRIB files. GRIB is the file format used as input and output for OpenIFS. The grib-api software is available for download from the grib-api software pages. Please use the latest version. Although pre-compiled, binary packages are available, please download the source files and compile it. This is to ensure the same compiler and compiler version is used for OpenIFS and grib-api, otherwise errors from mismatching modules are likely. See the grib_api for OpenIFS install page for more details on how to build grib_api for OpenIFS.
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lapack & blas libraries - these are usually available on all flavours of Linux/Unix. Some systems, notably HPC installations will have special optimized versions of these libraries. These should be used instead (if a version exists for your choice of compiler) to achieve a better performance. You may need to modify the compile configuration to access these optimized libraries. If the lapack/blas libraries are not available or you choose not to use them, OpenIFS comes with the necessary lapack code. This is disabled by default. Contact openifs-support@ecmwf.int for details.
Perl modules required.
Software called FCM is used to compile the model. FCM is provided with OpenIFS. However, note that it may need additional Perl modules installed. The two most likely missing modules are: XML::ParserCheck and Time::Piece. To check a Perl module is installed e.g. XML::Parser, type the command perl -MXML::Parser -e 1. If the module is not installed this will cause an error. For help with installing missing Perl modules either see the CPAN module page or ask your local support team. ECMWF cannot provide assistance in installing Perl on your machine.
FCM is developed by the UK Meteorological Office. For more information, please visit: FCM home page or the the FCM install page for more details.
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