As Jari seems a reluctant maintainer https://cygwin.com/ml/cygwin-apps/2014-06/msg00046.html
I rebuilt xgraph with latest debian patches using cygport. It solves the 64 bit segfault reported on: https://cygwin.com/ml/cygwin/2016-03/msg00538.html to download (remove the index.html's) : wget -r -np -nH --cut-dirs=0 \ http://matzeri.altervista.org/x86/xgraph/index.html wget -r -np -nH --cut-dirs=0 \ http://matzeri.altervista.org/x86_64/xgraph/index.html find x86 x86_64 -name index.html -o -name md5.sum | xargs rm Regards Marco