How to build FFTW with Arm Compiler.

FFTW is a library for computing real and complex discrete Fourier transforms (DFT) in one or more dimensions. For more information, see the FFTW website.

For the purposes of this build, the following components are used:

Component Form
FFTW Version 3.3.8
Arm Compiler
Version 19.1
Operating system RHEL 7.5
Cavium ThunderX2