Building¶

Requirements¶

Only strict requirements are:

numpy

scipy

Extra requirements are:

pyclass (for CLASS)

CAMB (for CAMB)

pyfftw (for faster FFTs)

To install cosmoprimo, simply run:

python -m pip install git+https://github.com/cosmodesi/cosmoprimo

If you want to install extra requirements as well (pyclass, CAMB, astropy, pyfftw), run:

python -m pip install git+https://github.com/cosmodesi/cosmoprimo#egg=cosmoprimo[class,camb,astropy,extras]

pyclass can be installed independently through:

python -m pip install git+https://github.com/adematti/pyclass

Boltzmann code CLASS will be compiled at installation time.

If you wish to use clang compiler (instead of gcc), you may encounter an error related to -fopenmp flag. In this case, you can try to export:

export CC=clang

Before installing pyclass. This will set clang OpenMP flags for compilation (see https://github.com/lesgourg/class_public/issues/405). Note that with Mac OS “gcc” may sometimes point to clang.