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INSTALL.md

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Build and Install Instructions

Prerequisites

A supported Fortran compiler (see table below). Other versions may work, in particular if close to the versions listed below.

Compiler vendor Supported (tested) versions
Intel 18.0.3.222 and above
GNU 10.3.0 and above

A supported MPI library (see table below). Other versions may work, in particular if close to the versions listed below.

MPI library Supported (tested) versions
MPICH 3.3.1 and above
Open MPI 3.1.5 and above
Intel MPI 2018.0.4 and above

Third-party libraries (TPL) compiled with the same compiler and MPI library (where applicable).

Library Supported (tested) versions
CMake 3.20.1 and above
HDF5 1.10.4 and above
NetCDF-C 4.7.3 and above
NetCDF-Fortran 4.5.2 and above

NCEP Libraries (NCEPLibs) compiled with the same compiler and MPI library (where applicable).

Library Supported (tested) versions
BUFR 11.7.0 and above
IP 3.3.3 and above
SP 2.3.3 and above
BACIO 2.4.1 and above
W3EMC 2.9.1 and above
SIGIO 2.3.2 and above
SFCIO 1.4.1 and above
NEMSIO 2.5.2 and above
NCIO 1.1.2 and above
WRF_IO 1.2.0 and above
CRTM 2.3.0 and above

Optional Libraries

Library Supported (tested) versions
GSI-ncdiag 1.0.0 and above (used for Correlated obs. error.)
GSI (Regional) EnKF ARW utilities
EnKF (GFS) EFSOI utilities

Building the GSI Utilities

CMake employs an out-of-source build. Create a directory for configuring the build and cd into it:

mkdir -p build && cd build

Set the compilers, if needed, to match those being used for compiling the TPL and NCEPLibs listed above: FC environment variable can be used to point to the desired Fortran compiler.

Execute cmake from inside your build directory.

cmake -DCMAKE_INSTALL_PREFIX=<install-prefix> <CMAKE_OPTIONS> /path/to/GSI-utils-source

If the dependencies are not located in a path recognized by cmake e.g. /usr/local, it may be necessary to provide the appropriate environment variables e.g. <package_ROOT> or CMAKE_PREFIX_PATH so that cmake is able to locate these dependencies.

gsi_ROOT and enkf_ROOT provides the path to the GSI and EnKF installations on the system. Refer to the installation instructions for the GSI/EnKF here

The installation prefix for GSI-utils tools is provided by the cmake command-line argument -DCMAKE_INSTALL_PREFIX=<install-prefix>

To build and install:

make -j<x>
make install

CMake Options

CMake allows for various options that can be specified on the command line via -DCMAKE_OPTION=VALUE or from within the ccmake gui. The list of options currently available is as follows:

Option Description (Default)
BUILD_UTIL_ALL Build All Utilities (OFF)
BUILD_UTIL_AERODA Build Aerosol DA utility (OFF)
BUILD_UTIL_COV_CALC Build Correlated Obs. Error utility (OFF)
BUILD_UTIL_EFSOI Build Ensemble FSOI application (OFF)
BUILD_UTIL_ENKF_GFS Build GFS ensemble utilities (OFF)
BUILD_UTIL_ENKF_ARW Build ARW ensemble utilities (OFF)
BUILD_UTIL_NCIO Build NetCDF IO utilities (OFF)
BUILD_UTIL_COM Build Miscellaneous community utilities (OFF)
BUILD_UTIL_BKGERR Build Background Error utility (OFF)
BUILD_UTIL_ETC Build Miscellaneous utilities (OFF)