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Download grib_api
In this example, we assume you have created a directory called $HOME/ecmwf in which you will download and compile grib_api.
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If you haven't already obtained the grib_api package, get it from the OpenIFS ftp site. The userid for ftp is 'openifs'. If you need the password, please email: openifs-support@ecmwf.int. Please note that currently we require a signed license before password access can be granted to the ftp site, though grib_api is freely available from the ECMWF website.
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grib-api web site. We recommend downloading the latest version. Some of the instructions for options below may differ with the very latest versions.
Unpacking grib_api
To unpack the software:
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Some compilers will link to the shared version by default if both are found (e.g. the GNU compiler). To ensure the correct version of grib_api is found (in case several are available on your system), OpenIFS explicitly lists the static library in the FCM configuration files. Alternately, if you prefer to use the shared library, you must ensure that your LD_LIBRARY_PATH variable is set so that 1.9.18 version compiled here is found first. Alternately, the option --disable-shared stops the shared libraries from being generated, only the static libraries are built and will be linked. However, this may prevent other grib api tools working and is not generally recommended.
Choice of compiler and options
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