Installation Guide
==================

Requirements
------------

The package depends on Fortran Libraries, FFTW, HEALPix, cfitsio and LensPix. 
Source code for those is included with this package. You also need F2py and a fortran compiler to compile Fortran sources.
Note that the F90 sources are written assuming the intel Fortran compiler. 

Install
-------

0) The pakage can be downloaded from https://github.com/toshiyan/cmblensplus or type 

    git clone git@github.com:toshiyan/cmblensplus.git


1) Install the public codes (FFTW, cfitsio, Healpix, Lenspix, and Lapack) at F90/pub/ or fortran_internal/src_public/

2) Edit the shell file to add, e.g. for .bashrc.ext in NERSC

    module load intel

    export LD_LIBRARY_PATH=${path-to-cmblensplus-F90-public-code}/Healpix/lib/:${path-to-cmblensplus-F90-public-code}/cfitsio/:$LD_LIBRARY_PATH
    
    export PYTHONPATH=${path-to-cmblensplus}/utils/:${path-to-cmblensplus}/wrap/:$PYTHONPATH (or export PYTHONPATH=${path-to-cmblensplus}/utils/:${path-to-cmblensplus}:$PYTHONPATH


3) ./install.sh wrap or setup.py build


Tips
----

- Use icx for CC in Healpix installation on NERSC

- libifport.so.5 not found

  Indicating that ifort is not loaded appropriately. 

- Segmentation fault after installing everything

  Some Healpix subroutine has a problem. One quick solution is to set "ulimit -s unlimited"