FleCSI journey:

    Writting build script of FleCSI with different backends with bash shell.
    
    Exploring hang issue in the unit tests of flecsi hpx backend.
    
    Testing mpi and HPX backend of FleCSI.

HEADS UP when building flecsi : update package.py

(https://github.com/STEllAR-GROUP/flecsi2/blob/502ca8ced4d0712b4f482dd055efa0ca23e940d5/spack-repo/packages/flecsi/package.py#L22 
and 
https://github.com/STEllAR-GROUP/flecsi2/blob/502ca8ced4d0712b4f482dd055efa0ca23e940d5/spack-repo/packages/flecsi/package.py#L20)

before install&build flecsi using spack.

details -- scripts

 See folder:  build hpx_backend flecsi