# install_dir. Usually it's something like "$HOME/local" or "$HOME/Install" . # Also change "most_recent_fftw" if there's a more recent version. # ===== Set these ...

set -o pipefail # pipe exit code of chained commands to rightmost. # set -v # print shell input lines as they are read. # set -n read commands but do not execute them, used to check for syntax errors, ...