2.3.1. Building OpenFAST with Spack

The process to build and install OpenFAST with Spack on Linux or macOS is described here.

2.3.1.1. Dependencies

OpenFAST has the following dependencies:

  • LAPACK libraries. Users should set BLAS_LIBRARIES and LAPACK_LIBRARIES appropriately for CMake if the library isn’t found in standard paths. Use BLASLIB as an example when using Intel MKL.
  • For the optional C++ API, HDF5 (provided by HDF5_ROOT) and yaml-cpp (provided by YAML_ROOT)
  • For the optional testing framework, Python 3+ and Numpy

2.3.1.2. Building OpenFAST Semi-Automatically Using Spack on macOS or Linux

The following describes how to build OpenFAST and its dependencies mostly automatically on macOS using Spack. This can also be used as a template to build OpenFAST on any Linux system with Spack.

These instructions were developed on macOS 10.11 with the following tools installed via Homebrew:

  • GCC 6.3.0
  • CMake 3.6.1
  • pkg-config 0.29.2

2.3.1.2.1. Step 1

Checkout the official Spack repo from github (we will checkout into ${HOME}):

cd ${HOME} && git clone https://github.com/LLNL/spack.git

2.3.1.2.2. Step 2

Add Spack shell support to your .profile by adding the lines:

export SPACK_ROOT=${HOME}/spack
. $SPACK_ROOT/share/spack/setup-env.sh

2.3.1.2.3. Step 3

Copy the https://raw.githubusercontent.com/OpenFAST/openfast/dev/share/spack/package.py file to your installation of Spack:

mkdir ${SPACK_ROOT}/var/spack/repos/builtin/packages/openfast
cd ${SPACK_ROOT}/var/spack/repos/builtin/packages/openfast
wget --no-check-certificate https://raw.githubusercontent.com/OpenFAST/openfast/dev/share/spack/package.py

2.3.1.2.4. Step 4

Try spack info openfast to see if Spack works. If it does, check the compilers you have available by:

machine:~ user$ spack compilers
==> Available compilers
-- gcc ----------------------------------------------------------
[email protected]  [email protected]

-- clang --------------------------------------------------------
[email protected]  [email protected]

2.3.1.2.5. Step 5

Install OpenFAST with your chosen version of GCC:

spack install openfast %[email protected]

To install OpenFAST with the C++ API, do:

spack install openfast+cxx %[email protected]

That should be it! Spack will automatically use the most up-to-date dependencies unless otherwise specified. For example to constrain OpenFAST to use some specific versions of dependencies you could issue the Spack install command:

spack install openfast %[email protected] ^[email protected]

The executables and libraries will be located at

spack location -i openfast

Add the appropriate paths to your PATH and LD_LIBRARY_PATH to run OpenFAST.