It should be under $SAGE_LOCAL/bin/cygSingular-<version>.dll. Rather than guess at the version the attached patch just takes the latest one (which will normally be the only one). It's pretty hacky, but then so is this code on other platforms too.

For the purposes of the standard Sage distribution this should generally work though.

Component: porting: Cygwin

Author: Erik Bray, Jeroen Demeyer

Branch/Commit: cb3dadf

Reviewer: Jeroen Demeyer, Volker Braun

Issue created by migration from https://trac.sagemath.org/ticket/22628