Is there a C++ cross platform USB library?

Question

I\'m (going to be) writing an application in Qt that will run on the 3 main OSes (Windows, Linux and Mac). One of the features of this app is that it needs USB to talk to a piec

Answer 1

Try libusb.

Supported operating systems: Linux, FreeBSD, NetBSD, OpenBSD, Darwin, MacOS X (and Windows, through the libusb-win32 project).

But you should note that it uses libusb0.sys kernel-mode driver on Windows, which is not WHQL certified and it could be a problem in 64-bit Windows 7 and Windows Server 2008 R2. Sorry, version 1.2.0.0 of libusb0.sys is digitally signed.