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In this example, assume you have created a directory called ' $HOME/ecmwf in which you will download and compile grib_api.
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--prefix | This specifies where you want the grib_api files to be installed. In our example here, the source code is in $HOME/ecmwf/grib_api_1.9.18 and we will put the compiled grib_api libraries in our example directory $HOME/ecmwf/grib_api_gcc. You are free to choose any installation directory but it's recommended to keep the installed binaries & libraries in a separate directory to the source code in case different compiler versions are needed. On a shared high performance computer facility, the install path would most likely be somewhere central. If nothing is specified for --prefix, by default grib_api will install in /usr/local. |
--disable-jpeg | OpenIFS does not need to support JPEG and PNG for data compression. This removes the need to link OpenIFS against the Jasper library (libjasper.a). |
--enable-pthread | This option ensures that grib_api is thread-safe. Again, this is normally the default but we enforce it here as OpenIFS will call grib_api from parallel threads. |
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At the end of this step, in the directory $HOME/ecmwf/grib_api we are using in this example you should now have a directory called 'grib_api_gcc' (or some other compiler suffix) which contains the following:
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