  We prove that the link of a complex normal surface singularity is an L--space
if and only if the singularity is rational. This via a recent result of
Hanselman, J. Rasmussen, S. D. Rasmussen and Watson (proving the conjecture of
Boyer, Gordon and Watson), shows that a singularity link is not rational if and
only if its fundamental group is left-orderable if and only if it admits a
coorientable taut foliation.
