Installing TRIQS 2.2.x on Catalina

[shinaoka]

This is a memo.
I struggled to install TRIQS on Catalina.
Since TRIQS does not support Python 3.x,
we need to stick to Python 2.7.

• Python 2.7.15 (from pyenv WITH shared library)
• HDF5 1.8 (from homebrew)
• h5py 2.7.1 (from pip)

> CONFIGURE_OPTS="--enable-shared" pyenv install 2.7.15
> brew uninstall hdf5 # Uninstall other verions if installed
> brew install hdf5@1.8
> pip install cython # If you do not install Cython, pyenv may pick up a wrong one
> HDF5_DIR=/usr/local/opt/hdf5@1.8  pip install --no-binary=h5py h5py==2.7.1

Before configuring a build for TRIQS, set

> export HDF5_ROOT=/usr/local/opt/hdf5@1.8