This port is currently marked BROKEN due to its dependence on
an obsolete version of fltk. In addition, from its website
"Note: SpiralLoops isn't being supported any more. This is
because there is now a much better featured spiralloop plugin
for SpiralSynth Modular (http://www.pawfal.org/Software/SSM)."
Delete the port.
Over to maintainer.
Maintainer objects to this idea, so close it.