Experimental Physics and
Industrial Control System

Both systems have the same version of EPICS retrieved from github. I also believe that both systems have the same version of ASYN.

Is the version number listed somewhere in the module so that I can double check?

I can't remember if I got them from the module github

page or if I pulled them out of synApps and compiled them. Is there a preferred method?

The libusb question gets a bit interesting. The first system was debian based and so I installed libusb-1.0 via apt. 

Running dpkg --get-selections | grep libusb gives me this output on the debian system.

libhidapi-libusb0:amd64 install
libusb-0.1-4:amd64 install
libusb-1.0-0:amd64 install
libusb-1.0-0:i386 install
libusb-1.0-0-dev:amd64 install
libusb-1.0-doc install
libusb-dev install
libusbmuxd4:amd64 install

When I was compiling asyn for the Scientific Linux system it kept complaining that <libusb/libusb-1.0.h> was not found.

I had someone install what I thought was the correct package, but still got the same error when compiling.

Someone else then mentioned something about libusb vs libusbx. Here is the output from running rpm -qa | grep libusb

on the Scientific Linux system:

libusbx-devel-1.0.21-1.el7.x86_64
libusbmuxd-1.0.10-5.el7.x86_64
libusb-0.1.4-3.el7.x86_64
libusb-devel-0.1.4-3.el7.x86_64
libusbx-1.0.21-1.el7.x86_64

Could that have something to do with it?