• Created by Unknown User (nagc), last modified on Dec 20, 2012

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Prerequisites

You should have completed the installation of grib_api, FCM and downloaded and unpacked the OpenIFS data files and OpenIFS source code.

Reminder: FCM is the name of the build software used to compile OpenIFS.

Build configuration

Before compiling the OpenIFS model, the build configuration must first be set by several environment variables:

OIFS_ARCH  - This sets the architecture of the computer. By default, the FCM build configuration assumes x86_64 (i.e. Linux)

OIFS_COMP - This sets the choice of compiler. The default is 'gnu' which means the gfortran/gcc compilers will be used.

OIFS_BUILD - This sets the type of build. Several choices can be build; fully optimized (opt), debugging/unoptimized (noopt), debugging with array bound checking (nansC) mode.

These environment variables directly correspond to the names of the FCM configuration files in the make/fcmcfg/ directory in the OpenIFS source. Please see this directory for the possible choices supported.

e.g.

export OIFS_ARCH=x86_64
export OIFS_COMP=intel
export OIFS_BUILD=opt

means using the Intel ifort compiler on a x86_64 computer architecture and the model will be compiled with full optimization compiler settings. Also the FCM build system will expect to find a file:

x86_64-intel-opt.cfg

in the 'make/fcmcfg' directory.

export OIFS_ARCH=aix_pwr6
export OIFS_COMP=xlf
export OIFS_BUILD=noopt

means FCM will look for a file:

aix_pwr6-xlf-noopt.cfg

in the make/fcmcfg directory suitable for building on IBM Power6 architecture using the XLF/XLCC compilers using non-optimized settings.

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