I'm trying to build expect from the 5.45.4 sources for an ARM Linux target. I've got TCL v8.6.11 building fine for said target, but am getting errors when configuring expect. It indicates: checking if WNOHANG requires _POSIX_SOURCE... configure: error: Expect can't be cross compiled In searching the net I found a couple references to this issue, but links were to old posts which I couldn't retrieve. Anyone have any suggestions?